package backendapp

import (
	"context"
	"errors"
	"fmt"
	"io/fs"
	"net/http"
	"net/url"
	"os"
	"sort"
	"strings"
	"time"

	"github.com/gin-gonic/gin"
	"go.uber.org/zap"

	agentcapabilities "github.com/kandev/kandev/internal/agent/capabilities/handlers"
	"github.com/kandev/kandev/internal/agent/docker"
	agenthandlers "github.com/kandev/kandev/internal/agent/handlers"
	"github.com/kandev/kandev/internal/agent/hostutility"
	"github.com/kandev/kandev/internal/agent/loginpty"
	"github.com/kandev/kandev/internal/agent/mcpconfig"
	"github.com/kandev/kandev/internal/agent/registry"
	client "github.com/kandev/kandev/internal/agent/runtime/agentctl"
	"github.com/kandev/kandev/internal/agent/runtime/lifecycle"
	agentsettingscontroller "github.com/kandev/kandev/internal/agent/settings/controller"
	agentsettingshandlers "github.com/kandev/kandev/internal/agent/settings/handlers"
	settingsstore "github.com/kandev/kandev/internal/agent/settings/store"
	"github.com/kandev/kandev/internal/agentctl/tracing"
	analyticshandlers "github.com/kandev/kandev/internal/analytics/handlers"
	analyticsrepository "github.com/kandev/kandev/internal/analytics/repository"
	"github.com/kandev/kandev/internal/auth"
	"github.com/kandev/kandev/internal/auth/authn"
	authhttpapi "github.com/kandev/kandev/internal/auth/httpapi"
	"github.com/kandev/kandev/internal/authz"
	"github.com/kandev/kandev/internal/automation"
	"github.com/kandev/kandev/internal/azuredevops"
	"github.com/kandev/kandev/internal/clarification"
	"github.com/kandev/kandev/internal/common/config"
	"github.com/kandev/kandev/internal/common/logger"
	"github.com/kandev/kandev/internal/common/ports"
	"github.com/kandev/kandev/internal/db"
	debughandlers "github.com/kandev/kandev/internal/debug"
	editorcontroller "github.com/kandev/kandev/internal/editors/controller"
	editorhandlers "github.com/kandev/kandev/internal/editors/handlers"
	"github.com/kandev/kandev/internal/entityrefs"
	"github.com/kandev/kandev/internal/events/bus"
	gateways "github.com/kandev/kandev/internal/gateway/websocket"
	"github.com/kandev/kandev/internal/github"
	"github.com/kandev/kandev/internal/gitlab"
	"github.com/kandev/kandev/internal/health"
	"github.com/kandev/kandev/internal/health/oslimits"
	"github.com/kandev/kandev/internal/i18n"
	"github.com/kandev/kandev/internal/improvekandev"
	"github.com/kandev/kandev/internal/integrations/workspacescope"
	"github.com/kandev/kandev/internal/jira"
	kuberneteshandlers "github.com/kandev/kandev/internal/kubernetes"
	"github.com/kandev/kandev/internal/linear"
	lspinstaller "github.com/kandev/kandev/internal/lsp/installer"
	mcphandlers "github.com/kandev/kandev/internal/mcp/handlers"
	mcpscope "github.com/kandev/kandev/internal/mcp/scope"
	mcpserver "github.com/kandev/kandev/internal/mcp/server"
	notificationcontroller "github.com/kandev/kandev/internal/notifications/controller"
	notificationhandlers "github.com/kandev/kandev/internal/notifications/handlers"
	officeagents "github.com/kandev/kandev/internal/office/agents"
	officesqlite "github.com/kandev/kandev/internal/office/repository/sqlite"
	officetestharness "github.com/kandev/kandev/internal/office/testharness"
	"github.com/kandev/kandev/internal/orchestrator"
	"github.com/kandev/kandev/internal/org"
	"github.com/kandev/kandev/internal/orgunit"
	"github.com/kandev/kandev/internal/plugins"
	pluginstore "github.com/kandev/kandev/internal/plugins/store"
	"github.com/kandev/kandev/internal/profiles"
	promptcontroller "github.com/kandev/kandev/internal/prompts/controller"
	prompthandlers "github.com/kandev/kandev/internal/prompts/handlers"
	"github.com/kandev/kandev/internal/quickterminal"
	"github.com/kandev/kandev/internal/repoclone"
	"github.com/kandev/kandev/internal/runtimeflags"
	"github.com/kandev/kandev/internal/secrets"
	"github.com/kandev/kandev/internal/sentry"
	spriteshandlers "github.com/kandev/kandev/internal/sprites"
	sshhandlers "github.com/kandev/kandev/internal/ssh"
	systemsvc "github.com/kandev/kandev/internal/system"
	"github.com/kandev/kandev/internal/system/storage/tempartifacts"
	taskdto "github.com/kandev/kandev/internal/task/dto"
	taskhandlers "github.com/kandev/kandev/internal/task/handlers"
	"github.com/kandev/kandev/internal/task/models"
	sqliterepo "github.com/kandev/kandev/internal/task/repository/sqlite"
	taskservice "github.com/kandev/kandev/internal/task/service"
	usercontroller "github.com/kandev/kandev/internal/user/controller"
	userhandlers "github.com/kandev/kandev/internal/user/handlers"
	utilitycontroller "github.com/kandev/kandev/internal/utility/controller"
	utilityhandlers "github.com/kandev/kandev/internal/utility/handlers"
	"github.com/kandev/kandev/internal/webapp"
	webembedded "github.com/kandev/kandev/internal/webapp/embedded"
	workflowcontroller "github.com/kandev/kandev/internal/workflow/controller"
	workflowhandlers "github.com/kandev/kandev/internal/workflow/handlers"
	"github.com/kandev/kandev/internal/workflowsync"
	"github.com/kandev/kandev/internal/worktree"
	v1 "github.com/kandev/kandev/pkg/api/v1"
	ws "github.com/kandev/kandev/pkg/websocket"
)

const (
	desktopHealthTokenEnv    = "KANDEV_DESKTOP_HEALTH_TOKEN"
	desktopHealthTokenHeader = "X-Kandev-Desktop-Health-Token"
	agentShutdownTimeout     = 20 * time.Second
	httpShutdownTimeout      = 10 * time.Second
	tracingShutdownTimeout   = 5 * time.Second
	addedFieldKey            = "added"
	branchFieldKey           = "branch"
	branchAdditionsFieldKey  = "branch_additions"
	branchDeletionsFieldKey  = "branch_deletions"
	deletedFieldKey          = "deleted"
	versionFieldKey          = "version"
	serviceFieldKey          = "service"
	kandevName               = "kandev"
	startingStatus           = "starting"
)

// buildSessionDataProvider constructs the session data provider function used by the WebSocket hub
// to send initial data (git status, context window, available commands) when a client subscribes.
func buildSessionDataProvider(
	taskRepo *sqliterepo.Repository,
	lifecycleMgr *lifecycle.Manager,
	cancellationProvider taskdto.CancellationPendingProvider,
	log *logger.Logger,
) func(context.Context, string) ([]*ws.Message, error) {
	return func(ctx context.Context, sessionID string) ([]*ws.Message, error) {
		session, err := taskRepo.GetTaskSession(ctx, sessionID)
		if err != nil {
			return nil, nil // Session not found, no data to send
		}

		var result []*ws.Message
		result = appendSessionStateMessageWithCancellation(sessionID, session, cancellationProvider, result)
		result = appendAgentctlStatusMessage(ctx, lifecycleMgr, sessionID, result, log)
		result = appendLiveGitStatusMessage(ctx, taskRepo, lifecycleMgr, sessionID, session, result, log)
		result = appendContextWindowMessage(sessionID, session, result)
		result = appendAvailableCommandsMessage(sessionID, session, lifecycleMgr, result)
		result = appendSessionModeMessage(sessionID, session, lifecycleMgr, result)
		result = appendSessionModelsMessage(sessionID, session, lifecycleMgr, result)
		return result, nil
	}
}

// buildSessionGitDataProvider constructs the narrow provider used by the diff
// panel's explicit refresh request. It intentionally does not hydrate session
// state, agent readiness, commands, mode, models, or context-window data.
func buildSessionGitDataProvider(taskRepo *sqliterepo.Repository, lifecycleMgr *lifecycle.Manager, log *logger.Logger) func(context.Context, string) ([]*ws.Message, error) {
	return func(ctx context.Context, sessionID string) ([]*ws.Message, error) {
		session, err := taskRepo.GetTaskSession(ctx, sessionID)
		if err != nil {
			return nil, nil
		}
		return appendLiveGitStatusMessage(ctx, taskRepo, lifecycleMgr, sessionID, session, nil, log), nil
	}
}

const sessionIDPayloadKey = "session_id"
const taskIDPayloadKey = "task_id"
const newStatePayloadKey = "new_state"
const sessionUpdatedAtPayloadKey = "updated_at"

// appendAgentctlStatusMessage snapshots the current agentctl readiness for a
// session so late-subscribing clients (page reload, task switch, WS reconnect)
// don't sit forever on "Connecting terminal..." waiting for events that have
// already fired.
//
// Non-blocking by design — sendSessionData runs in the WS read loop, so a
// network probe here would delay every subscribe/focus ACK by its timeout.
// Instead, replay the readiness cached by waitForAgentctlReady's successful
// health check. Agent process and workspace stream state are deliberately not
// used here: prepared sessions have a healthy agentctl before either exists.
// The subsequent waitForAgentctlReady event (or its error) corrects the status
// if the snapshot runs while startup is still in progress.
//
// Emits no message when the session has no live execution — the lazy
// create-on-terminal-connect path publishes events normally in that case.
func appendAgentctlStatusMessage(
	_ context.Context,
	lifecycleMgr *lifecycle.Manager,
	sessionID string,
	result []*ws.Message,
	_ *logger.Logger,
) []*ws.Message {
	if lifecycleMgr == nil {
		return result
	}
	execution, ok := lifecycleMgr.GetExecutionBySessionID(sessionID)
	if !ok {
		return result
	}

	payload := map[string]interface{}{
		sessionIDPayloadKey:  sessionID,
		"agent_execution_id": execution.ID,
	}
	if execution.TaskEnvironmentID != "" {
		payload["task_environment_id"] = execution.TaskEnvironmentID
	}
	if execution.WorkspacePath != "" {
		payload["worktree_path"] = execution.WorkspacePath
	}
	action := ws.ActionSessionAgentctlStarting
	if execution.IsAgentctlReady() {
		action = ws.ActionSessionAgentctlReady
	}

	notification, err := ws.NewNotification(action, payload)
	if err != nil {
		return result
	}
	return append(result, notification)
}

// appendSessionStateMessage always sends the current session state so clients
// that subscribe after a state change still receive the authoritative state.
//
// Includes task_environment_id when present so late-subscribing clients
// (page reload, task switch, WS reconnect) can seed environmentIdBySessionId
// — without it, env-routed shell terminals stall on "Connecting terminal...".
func appendSessionStateMessage(sessionID string, session *models.TaskSession, result []*ws.Message) []*ws.Message {
	return appendSessionStateMessageWithCancellation(sessionID, session, nil, result)
}

func cancellationPendingSnapshot(
	provider taskdto.CancellationPendingProvider,
	sessionID string,
) (bool, uint64) {
	if snapshotProvider, ok := provider.(taskdto.CancellationPendingSnapshotProvider); ok {
		return snapshotProvider.CancellationPendingSnapshot(sessionID)
	}
	return provider.CancellationPending(sessionID), 0
}

func appendSessionStateMessageWithCancellation(
	sessionID string,
	session *models.TaskSession,
	cancellationProvider taskdto.CancellationPendingProvider,
	result []*ws.Message,
) []*ws.Message {
	payload := map[string]interface{}{
		sessionIDPayloadKey:        sessionID,
		taskIDPayloadKey:           session.TaskID,
		newStatePayloadKey:         string(session.State),
		sessionUpdatedAtPayloadKey: session.UpdatedAt.UTC().Format(time.RFC3339Nano),
		"name":                     session.Name,
		"cancellation_pending":     false,
		"cancellation_revision":    uint64(0),
	}
	if cancellationProvider != nil {
		pending, revision := cancellationPendingSnapshot(cancellationProvider, sessionID)
		payload["cancellation_pending"] = pending
		payload["cancellation_revision"] = revision
	}
	if session.ReviewStatus != models.ReviewStatusNone {
		payload["review_status"] = string(session.ReviewStatus)
	}
	if session.Metadata != nil {
		payload["session_metadata"] = session.Metadata
	}
	if session.TaskEnvironmentID != "" {
		payload["task_environment_id"] = session.TaskEnvironmentID
	}
	notification, err := ws.NewNotification(ws.ActionSessionStateChanged, payload)
	if err == nil {
		result = append(result, notification)
	}
	return result
}

// appendLiveGitStatusMessage adds git status notification(s) from the canonical
// task-environment workspace. Multi-repo workspaces emit one notification per
// repo (stamped with repository_name); single-repo emits a single untagged
// notification. A session without an environment has no authoritative status
// scope and therefore emits nothing.
func appendLiveGitStatusMessage(ctx context.Context, taskRepo *sqliterepo.Repository, lifecycleMgr *lifecycle.Manager, sessionID string, session *models.TaskSession, result []*ws.Message, log *logger.Logger) []*ws.Message {
	sources, ok := resolveGitStatusSources(ctx, taskRepo, session, log)
	if !ok {
		return result
	}
	msgs, live := tryGetLiveGitStatusWithState(ctx, lifecycleMgr, sessionID, sources, log)
	if live {
		return append(result, msgs...)
	}
	return appendDBSnapshotGitStatus(ctx, taskRepo, sessionID, sources, result, log)
}

// tryGetLiveGitStatus attempts to get live git status from agentctl.
// Returns one notification per repo (one entry for single-repo workspaces).
// Returns nil when no eligible source has a live execution or agentctl is
// stuck. Callers that need to distinguish a failed live query from an absent
// live execution should use tryGetLiveGitStatusWithState.
func tryGetLiveGitStatus(ctx context.Context, lifecycleMgr *lifecycle.Manager, requestedSessionID string, sources *gitStatusSources, log *logger.Logger) []*ws.Message {
	msgs, _ := tryGetLiveGitStatusWithState(ctx, lifecycleMgr, requestedSessionID, sources, log)
	return msgs
}

// tryGetLiveGitStatusWithState probes every eligible execution in the
// environment under one deadline. The boolean is true as soon as an eligible
// non-terminal execution is found, even when agentctl cannot answer. This
// prevents a stale persisted snapshot from replacing an authoritative but
// currently unavailable live source.
func tryGetLiveGitStatusWithState(ctx context.Context, lifecycleMgr *lifecycle.Manager, requestedSessionID string, sources *gitStatusSources, log *logger.Logger) ([]*ws.Message, bool) {
	if lifecycleMgr == nil {
		return nil, false
	}
	if sources == nil || sources.environmentID == "" {
		return nil, false
	}

	// Bound the complete source probe, not each source independently. Shared
	// environments can have several eligible executions, and a stuck agentctl
	// must not add another two seconds for every sibling.
	rpcCtx, cancel := context.WithTimeout(ctx, 2*time.Second)
	defer cancel()

	live := false
	for _, sourceSessionID := range sources.sessionIDs {
		if err := rpcCtx.Err(); err != nil {
			return nil, live
		}
		execution, ok := lifecycleMgr.GetExecutionBySessionID(sourceSessionID)
		if !ok {
			continue
		}
		if !executionMatchesGitStatusSource(sources, execution, sourceSessionID, log) {
			continue
		}
		if !isLiveGitStatusExecution(execution) {
			continue
		}
		live = true
		if msgs := tryGetLiveGitStatusFromExecution(rpcCtx, execution, requestedSessionID, sourceSessionID, sources.environmentID, log); len(msgs) > 0 {
			return msgs, true
		}
	}
	return nil, live
}

func isLiveGitStatusExecution(execution *lifecycle.AgentExecution) bool {
	if execution == nil {
		return false
	}
	switch execution.Status {
	case v1.AgentStatusCompleted, v1.AgentStatusFailed, v1.AgentStatusStopped:
		return false
	default:
		// An empty status is retained as live for recovered/legacy in-memory
		// executions that have been registered but not promoted yet.
		return true
	}
}

func executionMatchesGitStatusSource(sources *gitStatusSources, execution *lifecycle.AgentExecution, sessionID string, log *logger.Logger) bool {
	if execution == nil || sources == nil || sources.environmentID == "" {
		return false
	}
	if execution.TaskEnvironmentID != "" && execution.TaskEnvironmentID != sources.environmentID {
		log.Debug("rejecting live git status source",
			zap.String("source_session_id", sessionID),
			zap.String("task_environment_id", sources.environmentID),
			zap.String("reason", "environment_mismatch"))
		return false
	}
	if execution.WorkspacePath != sources.workspacePath {
		log.Debug("rejecting live git status source",
			zap.String("source_session_id", sessionID),
			zap.String("task_environment_id", sources.environmentID),
			zap.String("reason", "workspace_mismatch"))
		return false
	}
	return true
}

func tryGetLiveGitStatusFromExecution(ctx context.Context, execution *lifecycle.AgentExecution, requestedSessionID, sourceSessionID, taskEnvironmentID string, log *logger.Logger) []*ws.Message {
	agentClient, releaseClient := execution.AcquireAgentCtlClient()
	defer releaseClient()
	if agentClient == nil {
		log.Debug("no agentctl client available for live git status",
			zap.String("source_session_id", sourceSessionID))
		return nil
	}

	// Force fresh git query: cache can wedge when the poll loop misses a HEAD change.
	multi, err := agentClient.GetGitStatusMultiFresh(ctx)
	if err != nil {
		log.Debug("failed to get live git status",
			zap.String("source_session_id", sourceSessionID),
			zap.Error(err))
		return nil
	}
	if multi == nil || !multi.Success || len(multi.Repos) == 0 {
		return nil
	}

	out := make([]*ws.Message, 0, len(multi.Repos))
	for _, repo := range multi.Repos {
		if !repo.Status.Success {
			continue
		}
		notification := buildGitStatusNotification(requestedSessionID, taskEnvironmentID, repo.RepositoryName, repo.Status)
		if notification != nil {
			out = append(out, notification)
		}
	}
	if len(out) == 0 {
		return nil
	}
	log.Debug("got live git status from agentctl",
		zap.String("requested_session_id", requestedSessionID),
		zap.String("source_session_id", sourceSessionID),
		zap.Int("repos", len(out)))
	return out
}

// buildGitStatusNotification packages a single repo's status as a WS event
// the frontend can route through its existing git-status handler. The
// repository_name is stamped on the inner status payload so the frontend
// stores it under byEnvironmentRepo[envKey][repository_name].
func buildGitStatusNotification(sessionID, taskEnvironmentID, repositoryName string, status client.GitStatusResult) *ws.Message {
	if taskEnvironmentID == "" {
		return nil
	}
	statusPayload := map[string]interface{}{
		branchFieldKey:          status.Branch,
		"remote_branch":         status.RemoteBranch,
		"head_commit":           status.HeadCommit,
		"base_commit":           status.BaseCommit,
		"ahead":                 status.Ahead,
		"behind":                status.Behind,
		"remote_ahead":          status.RemoteAhead,
		"remote_behind":         status.RemoteBehind,
		"remote_head_commit":    status.RemoteHeadCommit,
		"files":                 status.Files,
		"modified":              status.Modified,
		addedFieldKey:           status.Added,
		deletedFieldKey:         status.Deleted,
		"untracked":             status.Untracked,
		"renamed":               status.Renamed,
		branchAdditionsFieldKey: status.BranchAdditions,
		branchDeletionsFieldKey: status.BranchDeletions,
		"comparison_target":     status.ComparisonTarget,
		"comparison_status":     status.ComparisonStatus,
		"comparison_error_code": status.ComparisonErrorCode,
		"is_submodule":          status.IsSubmodule,
	}
	if repositoryName != "" {
		statusPayload["repository_name"] = repositoryName
	}
	gitEventData := map[string]interface{}{
		"type":                "status_update",
		"session_id":          sessionID,
		"task_environment_id": taskEnvironmentID,
		"timestamp":           status.Timestamp,
		"status":              statusPayload,
	}
	notification, err := ws.NewNotification(ws.ActionSessionGitEvent, gitEventData)
	if err != nil {
		return nil
	}
	return notification
}

// appendDBSnapshotGitStatus appends a git status notification from the newest
// eligible DB snapshot. The selected source is always routed as the requested
// subscription session.
func appendDBSnapshotGitStatus(ctx context.Context, taskRepo *sqliterepo.Repository, sessionID string, sources *gitStatusSources, result []*ws.Message, log *logger.Logger) []*ws.Message {
	if taskRepo == nil || sources == nil || sources.environmentID == "" {
		return result
	}
	logFields := []zap.Field{zap.String("requested_session_id", sessionID)}
	logFields = append(logFields, zap.String("task_environment_id", sources.environmentID))
	log.Debug("falling back to DB snapshot for git status", logFields...)

	snapshots, err := taskRepo.GetLatestGitStatusSnapshotsByTaskEnvironmentIDs(ctx, []string{sources.environmentID})
	if err != nil {
		log.Warn("failed to load DB snapshots for git status",
			zap.String("requested_session_id", sessionID),
			zap.Error(err))
		return result
	}
	latestByRepository := newestGitStatusSnapshotsByRepository(snapshots)
	if len(latestByRepository) == 0 {
		log.Debug("no eligible DB snapshot found for git status",
			zap.String("requested_session_id", sessionID))
		return result
	}
	repositoryNames := make([]string, 0, len(latestByRepository))
	for repositoryName := range latestByRepository {
		repositoryNames = append(repositoryNames, repositoryName)
	}
	sort.Strings(repositoryNames)
	for _, repositoryName := range repositoryNames {
		snapshot := latestByRepository[repositoryName]
		logFields := []zap.Field{
			zap.String("requested_session_id", sessionID),
			zap.String("source_session_id", snapshot.SessionID),
		}
		logFields = append(logFields, zap.String("task_environment_id", sources.environmentID))
		if repositoryName != "" {
			logFields = append(logFields, zap.String("repository_name", repositoryName))
		}
		log.Debug("selected DB snapshot for git status", logFields...)
		if notification := buildGitSnapshotNotification(sessionID, repositoryName, snapshot); notification != nil {
			result = append(result, notification)
		}
	}
	return result
}

func buildGitSnapshotNotification(sessionID, repositoryName string, snapshot *models.GitSnapshot) *ws.Message {
	if snapshot == nil || snapshot.TaskEnvironmentID == "" {
		return nil
	}
	metadata := snapshot.Metadata
	statusPayload := map[string]interface{}{
		branchFieldKey:          snapshot.Branch,
		"remote_branch":         snapshot.RemoteBranch,
		"head_commit":           snapshot.HeadCommit,
		"base_commit":           snapshot.BaseCommit,
		"ahead":                 snapshot.Ahead,
		"behind":                snapshot.Behind,
		"remote_ahead":          metadata["remote_ahead"],
		"remote_behind":         metadata["remote_behind"],
		"remote_head_commit":    metadata["remote_head_commit"],
		"files":                 snapshot.Files,
		"modified":              metadata["modified"],
		addedFieldKey:           metadata[addedFieldKey],
		deletedFieldKey:         metadata[deletedFieldKey],
		"untracked":             metadata["untracked"],
		"renamed":               metadata["renamed"],
		branchAdditionsFieldKey: metadata[branchAdditionsFieldKey],
		branchDeletionsFieldKey: metadata[branchDeletionsFieldKey],
		"comparison_target":     metadata["comparison_target"],
		"comparison_status":     metadata["comparison_status"],
		"comparison_error_code": metadata["comparison_error_code"],
	}
	if repositoryName != "" {
		statusPayload["repository_name"] = repositoryName
	}
	gitEventData := map[string]interface{}{
		"type":                "status_update",
		"session_id":          sessionID,
		"task_environment_id": snapshot.TaskEnvironmentID,
		"timestamp":           metadata["timestamp"],
		"status":              statusPayload,
	}
	notification, err := ws.NewNotification(ws.ActionSessionGitEvent, gitEventData)
	if err != nil {
		return nil
	}
	return notification
}

// appendContextWindowMessage adds a context window notification to result if available.
func appendContextWindowMessage(sessionID string, session *models.TaskSession, result []*ws.Message) []*ws.Message {
	if session.Metadata == nil {
		return result
	}
	contextWindow, ok := session.Metadata[models.SessionMetaKeyContextWindow]
	if !ok {
		return result
	}
	metadata := map[string]interface{}{
		models.SessionMetaKeyContextWindow: contextWindow,
	}
	if count, present := session.Metadata[models.SessionMetaKeyContextCompactionCount]; present {
		metadata[models.SessionMetaKeyContextCompactionCount] = count
	}
	notification, err := ws.NewNotification(ws.ActionSessionStateChanged, map[string]interface{}{
		"session_id": sessionID,
		"task_id":    session.TaskID,
		"metadata":   metadata,
	})
	if err == nil {
		result = append(result, notification)
	}
	return result
}

// appendAvailableCommandsMessage adds available slash commands notification to result if any.
func appendAvailableCommandsMessage(sessionID string, session *models.TaskSession, lifecycleMgr *lifecycle.Manager, result []*ws.Message) []*ws.Message {
	if lifecycleMgr == nil {
		return result
	}
	commands := lifecycleMgr.GetAvailableCommandsForSession(sessionID)
	if len(commands) == 0 {
		return result
	}
	notification, err := ws.NewNotification(ws.ActionSessionAvailableCommands, map[string]interface{}{
		"session_id":         sessionID,
		"task_id":            session.TaskID,
		"available_commands": commands,
	})
	if err == nil {
		result = append(result, notification)
	}
	return result
}

// appendSessionModeMessage adds session mode state notification to result if cached.
func appendSessionModeMessage(sessionID string, session *models.TaskSession, lifecycleMgr *lifecycle.Manager, result []*ws.Message) []*ws.Message {
	if lifecycleMgr == nil {
		return result
	}
	modeState := lifecycleMgr.GetModeStateForSession(sessionID)
	if modeState == nil || (modeState.CurrentModeID == "" && len(modeState.AvailableModes) == 0) {
		return result
	}
	notification, err := ws.NewNotification(ws.ActionSessionModeChanged, lifecycle.SessionModeEventPayload{
		TaskID:         session.TaskID,
		SessionID:      sessionID,
		CurrentModeID:  modeState.CurrentModeID,
		AvailableModes: modeState.AvailableModes,
	})
	if err == nil {
		result = append(result, notification)
	}
	return result
}

// appendSessionModelsMessage adds session models state notification to result if cached.
func appendSessionModelsMessage(sessionID string, session *models.TaskSession, lifecycleMgr *lifecycle.Manager, result []*ws.Message) []*ws.Message {
	if lifecycleMgr == nil {
		return result
	}
	return appendSessionModelsMessageFromState(
		sessionID,
		session,
		lifecycleMgr.GetModelStateForSession(sessionID),
		result,
	)
}

func appendSessionModelsMessageFromState(sessionID string, session *models.TaskSession, modelState *lifecycle.CachedModelState, result []*ws.Message) []*ws.Message {
	if modelState == nil {
		return result
	}
	snapshot, _ := lifecycle.LoadSessionModelsSnapshot(session.Metadata[models.SessionMetaKeyACPModelState])
	replayState := *modelState
	if len(replayState.Models) == 0 &&
		len(replayState.ConfigOptions) == 0 &&
		!replayState.ConfigOptionsSettled &&
		len(snapshot.Models) > 0 {
		replayState.Models = snapshot.Models
	}
	if replayState.CurrentModelID == "" && len(replayState.Models) == 0 {
		return result
	}
	notification, err := ws.NewNotification(ws.ActionSessionModelsUpdated, lifecycle.SessionModelsEventPayload{
		TaskID:               session.TaskID,
		SessionID:            sessionID,
		CurrentModelID:       replayState.CurrentModelID,
		Models:               replayState.Models,
		ConfigOptions:        replayState.ConfigOptions,
		ConfigOptionsSettled: replayState.ConfigOptionsSettled || snapshot.ConfigOptionsSettled,
		ConfigBaseline:       sessionACPConfigBaseline(session),
	})
	if err == nil {
		result = append(result, notification)
	}
	return result
}

func sessionACPConfigBaseline(session *models.TaskSession) map[string]string {
	if session == nil {
		return nil
	}
	baseline, _ := models.LoadSessionACPConfigBaseline(session.Metadata)
	return baseline
}

// routeParams holds all dependencies needed for HTTP and WebSocket route registration.
type routeParams struct {
	router                        *gin.Engine
	gateway                       *gateways.Gateway
	taskSvc                       *taskservice.Service
	taskRepo                      *sqliterepo.Repository
	officeRepo                    *officesqlite.Repository
	analyticsRepo                 analyticsrepository.Repository
	orchestratorSvc               *orchestrator.Service
	lifecycleMgr                  *lifecycle.Manager
	loginMgr                      *loginpty.Manager
	quickTerminalSvc              *quickterminal.Service
	hostUtilityMgr                *hostutility.Manager
	eventBus                      bus.EventBus
	services                      *Services
	systemSvc                     *systemsvc.Service
	workspaceRestorer             taskhandlers.WorkspaceQuarantineRestorer
	temporaryArtifacts            *tempartifacts.Registry
	runtimeFlagsSvc               *runtimeflags.Service
	dbPool                        *db.Pool
	agentSettingsController       *agentsettingscontroller.Controller
	agentSettingsRepo             settingsstore.Repository
	agentList                     taskhandlers.AgentLister
	agentRegistry                 *registry.Registry
	userCtrl                      *usercontroller.Controller
	notificationCtrl              *notificationcontroller.Controller
	editorCtrl                    *editorcontroller.Controller
	promptCtrl                    *promptcontroller.Controller
	utilityCtrl                   *utilitycontroller.Controller
	msgCreator                    *messageCreatorAdapter
	secretsSvc                    *secrets.Service
	secretStore                   secrets.SecretStore
	mcpConfigSvc                  *mcpconfig.Service
	authSvc                       *auth.Service
	agentRuntimeAvailability      *client.Availability
	addCleanup                    func(func() error)
	repoCloner                    *repoclone.Cloner
	version                       string
	webInternalURL                string
	webTitlePrefix                string
	devMode                       bool
	httpPort                      int
	features                      config.FeaturesConfig
	planCoalesceWindow            time.Duration
	planCoalesceWindowConfigured  bool
	homeDir                       string
	interimSettingsInterlockToken string
	log                           *logger.Logger
}

// registerRoutes sets up all HTTP and WebSocket routes on the given router.
func registerRoutes(p routeParams) {
	workflowCtrl := workflowcontroller.NewController(p.services.Workflow)
	var planService *taskservice.PlanService
	if p.planCoalesceWindowConfigured {
		planService = taskservice.NewPlanService(p.taskRepo, p.eventBus, p.log, p.planCoalesceWindow)
	} else {
		planService = taskservice.NewPlanService(p.taskRepo, p.eventBus, p.log)
	}
	// Per-user task scoping for plan reads/writes (opt-in auth).
	planService.SetTaskAuthorizer(p.taskSvc.AuthorizeTaskAccess)
	// Stamps each plan revision with the task's workflow step at write time.
	planService.SetWorkflowStepGetter(&workflowStepGetterAdapter{svc: p.services.Workflow})
	clarificationStore := clarification.NewStore(2 * time.Hour)
	clarificationCanceller := clarification.NewCanceller(clarificationStore, p.taskRepo, p.taskSvc, p.log)
	p.orchestratorSvc.SetClarificationCanceller(clarificationCanceller)
	p.taskSvc.SetClarificationCanceller(clarificationCanceller)
	// Single resolver instance shared by the REST clarification routes and the
	// external answer_question_kandev/list_pending_questions_kandev MCP tools
	// (R3: both entry points must race through the same claim).
	clarificationResolver := clarification.NewResolver(
		clarificationStore,
		p.taskRepo,
		p.msgCreator,
		p.taskSvc,
		p.orchestratorSvc,
		p.eventBus,
		p.orchestratorSvc.HandleClarificationPrimaryAnswered,
		p.log,
	)

	// Wire pending clarification requests into the office inbox.
	if p.services.OfficeSvcs != nil && p.services.OfficeSvcs.Dashboard != nil {
		p.services.OfficeSvcs.Dashboard.SetPermissionLister(clarificationStore)
	}

	// Office task-handoffs phase 4 + 5 — single HandoffService instance
	// shared by the MCP path (office agents) and the HTTP path (Kanban
	// subtask UI). Constructed here so registerTaskRoutes can wire it
	// into TaskHandlers.SetHandoffService and registerMCPAndDebugRoutes
	// reuses the same instance via SetHandoffService on mcpHandlers.
	handoffDocSvc := taskservice.NewDocumentService(p.taskRepo, p.log)
	handoffSvc := taskservice.NewHandoffService(p.taskRepo, p.taskRepo, handoffDocSvc,
		p.officeRepo, p.officeRepo, p.log)
	p.taskSvc.SetWorkspacePolicyAttacher(handoffSvc)
	handoffSvc.SetCommentReader(&officeCommentReaderAdapter{reader: p.officeRepo})
	// Phase 6 wirings — materializer hook + disk cleaner. The
	// SessionWorktreeReader and WorkspaceCleaner interfaces are both
	// satisfied by adapters that delegate to existing services.
	handoffSvc.SetSessionReader(p.taskRepo)
	if p.lifecycleMgr != nil {
		if wtMgr := p.lifecycleMgr.WorktreeManager(); wtMgr != nil {
			handoffSvc.SetWorkspaceCleaner(worktree.NewHandoffCleaner(wtMgr, p.log))
		}
	}
	handoffSvc.SetRunCanceller(p.orchestratorSvc)
	// Cascade archive/delete must re-publish task.updated / task.deleted
	// events; HandoffService walks the repo directly and bypasses the
	// Service wrappers that normally publish these. Without this wiring
	// the kanban board doesn't react to subtree archive/delete until a
	// full reload.
	handoffSvc.SetTaskEventPublisher(p.taskSvc)
	handoffSvc.SetVacatedStepReconciler(p.taskSvc)
	// Per-user scoping for the cascade is installed by
	// TaskHandlers.SetHandoffService, which is the call that makes the archive /
	// delete routes prefer the cascade over the guarded Service methods.
	if p.services.Office != nil {
		p.services.Office.SetWorkspaceGroupCleaner(handoffSvc)
	}
	// Config sync's own tables (office_config_sync_configs,
	// office_config_sync_manifest) have no FK/cascade onto the workspace
	// row, so DeleteWorkspace must release them explicitly or the poller
	// keeps running against — and resurrecting entities into — a deleted
	// workspace (see the "Workspace deletion side tables" convention).
	if p.services.Office != nil && p.services.OfficeSvcs != nil && p.services.OfficeSvcs.ConfigSync != nil {
		p.services.Office.SetConfigSyncCleaner(p.services.OfficeSvcs.ConfigSync)
	}
	// Cascade archive/delete must tear down runtime resources
	// (container, sandbox, worktree, executor_running rows) for every
	// task in the tree. Without this wiring the agent gets stopped via
	// runCanceller but its container leaks because the cascade bypasses
	// Service.ArchiveTask's runAsyncTaskCleanup branch.
	handoffSvc.SetTaskResourceCleaner(p.taskSvc)
	// Watch reset (Reset button on integration settings) cascade-deletes
	// every task a watch previously created. The integrations re-use the
	// shared HandoffService so the reset path goes through the same
	// cleanup machinery as the regular delete-task surface.
	if p.services.GitHub != nil {
		p.services.GitHub.SetCascadeTaskDeleter(handoffSvc)
	}
	if p.services.GitLab != nil {
		p.services.GitLab.SetCascadeTaskDeleter(handoffSvc)
	}
	if p.services.AzureDevOps != nil {
		p.services.AzureDevOps.SetCascadeTaskDeleter(handoffSvc)
	}
	// repoLookup validates a watcher's optional repository binding (workspace
	// ownership + default-branch fill) on create/update. Shared across the three
	// repo-less watchers; one concrete adapter satisfies each package's
	// structurally-identical RepositoryLookup interface.
	repoLookup := &repositoryLookupAdapter{svc: p.taskSvc}
	if p.services.GitLab != nil {
		p.services.GitLab.SetRepositoryLookup(repoLookup)
		p.services.GitLab.SetWatchDependencyValidator(&gitLabWatchDependencyValidator{
			tasks: p.taskSvc, workflows: p.services.Workflow, agents: p.agentSettingsRepo,
		})
	}
	if p.services.AzureDevOps != nil {
		p.services.AzureDevOps.SetWatchRepositoryLookup(repoLookup)
		p.services.AzureDevOps.SetWatchDependencyValidator(&gitLabWatchDependencyValidator{
			tasks: p.taskSvc, workflows: p.services.Workflow, agents: p.agentSettingsRepo,
		})
	}
	if p.services.Jira != nil {
		p.services.Jira.SetTaskDeleter(handoffSvc)
		p.services.Jira.SetRepositoryLookup(repoLookup)
		p.services.Jira.SetWorkspaceAuthorizer(p.taskSvc.AuthorizeWorkspaceAccess)
	}
	if p.services.Linear != nil {
		p.services.Linear.SetTaskDeleter(handoffSvc)
		p.services.Linear.SetRepositoryLookup(repoLookup)
		p.services.Linear.SetWorkspaceAuthorizer(p.taskSvc.AuthorizeWorkspaceAccess)
	}
	if p.services.Sentry != nil {
		p.services.Sentry.SetTaskDeleter(handoffSvc)
		p.services.Sentry.SetRepositoryLookup(repoLookup)
	}
	if p.services.Automation != nil {
		p.services.Automation.Service.SetRepositoryLookup(repoLookup)
	}
	p.orchestratorSvc.SetWorkspaceMaterializer(handoffSvc)
	// Phase 8 prompt enrichment — wire the office scheduler's
	// TaskContextProvider so every run prompt rendered by the active
	// office/service/BuildPrompt sees Related-tasks / Documents
	// available / Workspace sections.
	if p.services.OrchScheduler != nil {
		p.services.OrchScheduler.SetTaskContextProvider(handoffSvc)
	}

	p.gateway.SetupRoutes(p.router)
	registerTaskRoutes(p, planService, handoffSvc)
	registerSecondaryRoutes(p, workflowCtrl, clarificationStore, clarificationCanceller, clarificationResolver, planService, handoffSvc)
	if p.authSvc != nil {
		authhttpapi.RegisterRoutes(p.router, p.authSvc, p.services.SessionHostnameResolver, p.log)
	}

	// /health is a liveness probe: it answers 200 unconditionally, matching
	// the bootstrap handler's /health contract (internal/backendapp/
	// httpserver.go) so the launcher's healthcheck never depends on startup
	// progress. By the time this handler is reachable at all, ready is
	// already true (see the comment on startGatewayAndServe's Store calls),
	// but it does not gate on that flag — liveness must not depend on
	// readiness, or the crash loop docs/specs/startup-listener-before-
	// recovery/spec.md exists to fix comes back.
	p.router.GET("/health", healthHandler(p))

	// /ready is a readiness probe. It returns 200 only after main has
	// flipped the package-level `ready` flag — which happens after route
	// registration, agent-registry seeding, the HTTP listener accepting
	// connections, and (when KANDEV_E2E_MOCK is set) the testharness routes
	// being mounted. Before that, return 503 so callers (including the e2e
	// fixture's readiness wait and Kubernetes' readinessProbe) keep polling
	// instead of racing ahead and hitting 404s on routes that aren't wired
	// yet. See docs/specs/health-endpoint-version/spec.md for the exact
	// contract this endpoint now owns.
	p.router.GET("/ready", readyHandler(p))

	// /api/v1/features is a public, unauthenticated read of the runtime
	// feature-flag map. The frontend SSR-fetches it once per page render to
	// decide whether to mount Office (and any future flagged feature). The
	// `json:` tags on FeaturesConfig drive serialization, so adding a new
	// field to the struct is enough — no edit here required.
	// See docs/decisions/0007-runtime-feature-flags.md.
	p.router.GET("/api/v1/features", func(c *gin.Context) {
		c.JSON(http.StatusOK, p.features)
	})
	p.router.GET("/api/v1/app-state", func(c *gin.Context) {
		routePath := c.Query("path")
		if routePath == "" {
			routePath = c.Request.URL.Path
		}
		route := webapp.ClassifyRoute(routePath)
		payload := bootPayload(c.Request.Context(), c.Request, p, route)
		c.JSON(http.StatusOK, payload)
	})
	if p.webInternalURL == "" {
		if handler, distDir, ok := newWebAppHandler(p); ok {
			p.router.NoRoute(func(c *gin.Context) {
				handler.ServeHTTP(c.Writer, c.Request)
			})
			p.log.Info("Web SPA static serving enabled", zap.String("dist_dir", distDir))
			return
		}
	}

	if p.webInternalURL != "" {
		handler, err := newWebDevHandler(p)
		if err != nil {
			p.log.Error("Invalid web internal URL, skipping web dev handler", zap.String("url", p.webInternalURL), zap.Error(err))
		} else {
			p.router.NoRoute(func(c *gin.Context) {
				path := c.Request.URL.Path
				if strings.HasPrefix(path, "/api/") || path == "/ws" || path == "/health" || path == "/ready" {
					c.AbortWithStatus(http.StatusNotFound)
					return
				}
				// httputil.ReverseProxy panics with http.ErrAbortHandler as an
				// intentional stdlib signal when a streaming response is aborted
				// (e.g., the client disconnects mid-body, or the upstream dies
				// after response headers were already written). net/http.Server
				// understands this sentinel panic and closes the connection
				// quietly, but Gin's recovery middleware catches it first and
				// logs a noisy stack trace. Swallow that specific panic here
				// while letting any other panic bubble up to Gin's recovery.
				defer func() {
					if r := recover(); r != nil && r != http.ErrAbortHandler {
						panic(r)
					}
				}()
				handler.ServeHTTP(c.Writer, c.Request)
			})
			p.log.Info("Web dev handler enabled", zap.String("target", p.webInternalURL))
		}
	}
}

// healthHandler serves GET /health, the liveness probe. It always answers
// 200 with the process's running version — regardless of the `ready` flag —
// mirroring the bootstrap handler's /health contract (httpserver.go) so the
// launcher's healthcheck never depends on startup progress. See docs/specs/
// health-endpoint-version/spec.md for the exact response contract.
func healthHandler(p routeParams) gin.HandlerFunc {
	version := resolveVersion(p)
	return func(c *gin.Context) {
		if token := desktopHealthToken(); token != "" {
			c.Header(desktopHealthTokenHeader, token)
		}
		c.JSON(http.StatusOK, gin.H{
			statusKey:       "ok",
			serviceFieldKey: kandevName,
			"mode":          "websocket+http",
			versionFieldKey: version,
		})
	}
}

// readyHandler serves GET /ready, the readiness probe. The response always
// carries the process's running version — in both the ready and not-ready
// bodies — so an operator can identify the build of a backend that is stuck
// starting, and so a monitor never needs a credential to read it (see
// docs/specs/health-endpoint-version/spec.md).
func readyHandler(p routeParams) gin.HandlerFunc {
	version := resolveVersion(p)
	return func(c *gin.Context) {
		if !ready.Load() {
			c.JSON(http.StatusServiceUnavailable, gin.H{
				statusKey:       startingStatus,
				serviceFieldKey: kandevName,
				versionFieldKey: version,
			})
			return
		}
		c.JSON(http.StatusOK, gin.H{
			statusKey:       "ok",
			serviceFieldKey: kandevName,
			versionFieldKey: version,
		})
	}
}

// resolveVersion returns p.version, falling back to the package-level
// Version. p.version is normally wired in by run()'s registerRoutes call;
// the fallback keeps the never-empty guarantee (AC-11) true regardless of
// that call-site wiring, since standing up run()'s full DI graph in a test
// just to exercise that one field assignment is out of proportion.
func resolveVersion(p routeParams) string {
	if p.version != "" {
		return p.version
	}
	return Version
}

func desktopHealthToken() string {
	return strings.TrimSpace(os.Getenv(desktopHealthTokenEnv))
}

func newWebAppHandler(p routeParams) (*webapp.Handler, string, bool) {
	assets, source, ok := webAssetsFS()
	if !ok {
		return nil, "", false
	}
	handler := webapp.NewHandler(assets, webAppHandlerOptions(p)...)
	return handler, source, true
}

func newWebDevHandler(p routeParams) (*webapp.DevHandler, error) {
	return webapp.NewDevHandler(p.webInternalURL, webAppHandlerOptions(p)...)
}

func webAppHandlerOptions(p routeParams) []webapp.HandlerOption {
	return []webapp.HandlerOption{
		webapp.WithPayloadBuilder(func(req *http.Request, route webapp.RouteClassification) webapp.BootPayload {
			return bootPayload(req.Context(), req, p, route)
		}),
	}
}

// webRuntimeConfig builds the SPA's runtime block. `req` supplies the active
// locale (from the kandev_locale cookie) so the shell can set <html lang> and the
// client can activate the right catalog before first paint.
func webRuntimeConfig(debug bool, titlePrefix string, req *http.Request) webapp.RuntimeConfig {
	return webapp.RuntimeConfig{
		APIPrefix:                         "/api/v1",
		WebSocketPath:                     "/ws",
		LSPAutoInstallPreferenceLanguages: lspinstaller.AutoInstallPreferenceLanguages(),
		Debug:                             debug,
		// Gates QA-only UI (the pseudo-locale option). Separate from Debug: the
		// e2e harness serves a PRODUCTION bundle, so the frontend cannot infer
		// this from its own build mode.
		NonProduction: profiles.DetectEnvironment() != profiles.EnvProd,
		Locale:        i18n.FromRequest(req),
		TitlePrefix:   strings.TrimSpace(titlePrefix),
	}
}

func bootPayload(ctx context.Context, req *http.Request, p routeParams, route webapp.RouteClassification) webapp.BootPayload {
	initialState := bootInitialState(ctx, req, p, route)
	routeData := bootRouteData(ctx, req, p, route)
	if route.Route == webapp.RouteTaskDetail && routeData == nil && canLoadTaskDetailFallback(req, p.authSvc) {
		bootStateBuilder{p: p}.addHomeKanbanRouteState(ctx, req, initialState)
	}
	runtime := webRuntimeConfig(p.devMode, p.webTitlePrefix, req)
	if p.systemSvc != nil && p.systemSvc.Info != nil {
		runtime.BootID = p.systemSvc.Info.Info().BootID
	}
	payload := webapp.NewBootPayload(
		route,
		runtime,
		initialState,
	)
	payload.RouteData = routeData
	payload.Plugins = bootActivePlugins(p)
	payload.InterimSettingsInterlockToken = p.interimSettingsInterlockToken
	return payload
}

func canLoadTaskDetailFallback(req *http.Request, authSvc *auth.Service) bool {
	if authSvc == nil || authSvc.Mode() == auth.ModeDisabled {
		return true
	}
	if req == nil {
		return false
	}
	_, ok := authn.IdentityFromContext(req.Context())
	return ok
}

// bootActivePlugins populates the boot payload's Plugins list from every
// active, UI-bundle-declaring plugin, per
// docs/plans/plugins/PLUGIN-API.md ("Loading model").
func bootActivePlugins(p routeParams) []webapp.ActivePluginPayload {
	if p.services == nil || p.services.Plugins == nil {
		return nil
	}
	records := p.services.Plugins.ActiveUIPlugins()
	out := make([]webapp.ActivePluginPayload, 0, len(records))
	for _, rec := range records {
		entry := webapp.ActivePluginPayload{
			ID:        rec.ID,
			Name:      rec.DisplayName,
			BundleURL: pluginBundleURL(rec),
			StyleURLs: pluginStyleURLs(rec),
		}
		if rec.RepositoryProviders != nil {
			providerIDs := make([]string, len(rec.RepositoryProviders))
			copy(providerIDs, rec.RepositoryProviders)
			entry.RepositoryProviderIDs = &providerIDs
		}
		out = append(out, entry)
	}
	return out
}

// pluginBundleURL builds the browser-facing bundle URL, mirrored on the
// frontend by lib/plugins/active-plugin.ts's toActivePlugin. The `?v=`
// query param keys the URL on the installed version so an updated plugin
// resolves to a *different* module specifier: without it,
// unloadPlugin(id, {evictCache: true}) (apps/web/lib/plugins/host.ts) drops
// the cached bundle registration on update, but a same-tab re-import() of
// the identical URL returns the browser's already-evaluated ES module
// without re-running its top-level registerKandevPlugin() call — leaving
// the plugin active but unregistered. An unchanged version keeps the same
// URL across boots, so normal (non-update) loads stay cache-friendly.
func pluginBundleURL(rec pluginstore.Record) string {
	return "/api/plugins/" + rec.ID + "/bundle?v=" + url.QueryEscape(rec.Version)
}

// pluginStyleURLs maps a plugin's root-relative ui.styles paths to
// browser-facing URLs served through the /api/plugins/:id/ui/* proxy (the
// plugin's own base_url is never exposed to the browser directly).
func pluginStyleURLs(rec pluginstore.Record) []string {
	if len(rec.UI.Styles) == 0 {
		return nil
	}
	urls := make([]string, 0, len(rec.UI.Styles))
	for _, style := range rec.UI.Styles {
		urls = append(urls, "/api/plugins/"+rec.ID+"/ui"+style)
	}
	return urls
}

func webAssetsFS() (fs.FS, string, bool) {
	distDir := os.Getenv("KANDEV_WEB_DIST_DIR")
	if distDir == "" {
		distDir = firstExistingDir("apps/web/dist", "../web/dist", "../../apps/web/dist")
	}
	if distDir != "" {
		return os.DirFS(distDir), distDir, true
	}
	assets, err := webembedded.FS()
	if err != nil {
		return nil, "", false
	}
	return assets, "embedded", true
}

func firstExistingDir(candidates ...string) string {
	for _, candidate := range candidates {
		info, err := os.Stat(candidate)
		if err == nil && info.IsDir() {
			return candidate
		}
	}
	return ""
}

// resolvePrimaryTaskRepositoryID returns the primary (lowest-position)
// task_repositories.repository_id for a task, or "" if none / on error.
// Used by PR-import callbacks where the PR is associated with the task's
// primary repo (the one the task was created against).
func resolvePrimaryTaskRepositoryID(ctx context.Context, taskRepo *sqliterepo.Repository, taskID string, log *logger.Logger) string {
	repo, err := taskRepo.GetPrimaryTaskRepository(ctx, taskID)
	if err != nil {
		log.Warn("primary task repository lookup failed",
			zap.String("task_id", taskID), zap.Error(err))
		return ""
	}
	if repo == nil {
		return ""
	}
	return repo.RepositoryID
}

// resolveRepositoryIDForSubpath maps a multi-repo subpath name (e.g.
// "kandev") to its task_repositories.repository_id by joining with the
// repositories table on Name. Empty subpath falls back to the primary
// repository so single-repo tasks Just Work. Returns "" if no match — the
// caller will then write a legacy single-repo PR row.
func resolveRepositoryIDForSubpath(ctx context.Context, taskRepo *sqliterepo.Repository, taskID, subpath string, log *logger.Logger) string {
	if subpath == "" {
		return resolvePrimaryTaskRepositoryID(ctx, taskRepo, taskID, log)
	}
	repos, err := taskRepo.ListTaskRepositories(ctx, taskID)
	if err != nil {
		log.Warn("task repositories lookup failed",
			zap.String("task_id", taskID), zap.Error(err))
		return ""
	}
	for _, link := range repos {
		repo, err := taskRepo.GetRepository(ctx, link.RepositoryID)
		if err != nil || repo == nil {
			continue
		}
		if repo.Name == subpath || worktree.SanitizeRepoDirName(repo.Name) == subpath {
			return link.RepositoryID
		}
	}
	log.Warn("no task repository matches subpath",
		zap.String("task_id", taskID), zap.String("subpath", subpath))
	return ""
}

func resolveRepositoryIDForSessionSubpath(ctx context.Context, taskRepo *sqliterepo.Repository, sessionID, subpath string, log *logger.Logger) string {
	worktrees, err := taskRepo.ListTaskSessionWorktrees(ctx, sessionID)
	if err != nil {
		log.Warn("session worktrees lookup failed",
			zap.String("session_id", sessionID), zap.Error(err))
		return ""
	}
	if subpath == "" {
		if len(worktrees) == 1 {
			return worktrees[0].RepositoryID
		}
		log.Warn("branch rename did not specify repo for multi-repo session",
			zap.String("session_id", sessionID), zap.Int("worktree_count", len(worktrees)))
		return ""
	}
	for _, wt := range worktrees {
		// Multi-repo sessions are small today and repository lookup is only on
		// branch rename, so keep this direct until the repository interface grows
		// a batch lookup.
		repo, err := taskRepo.GetRepository(ctx, wt.RepositoryID)
		if err != nil || repo == nil {
			continue
		}
		if repo.Name == subpath || worktree.SanitizeRepoDirName(repo.Name) == subpath {
			return wt.RepositoryID
		}
	}
	log.Warn("no session worktree repository matches subpath",
		zap.String("session_id", sessionID), zap.String("subpath", subpath))
	return ""
}

// registerTaskRoutes registers all task-related HTTP and WebSocket routes.
func registerTaskRoutes(p routeParams, planService *taskservice.PlanService, handoffSvc *taskservice.HandoffService) {
	if attachmentSvc := p.taskSvc.AttachmentService(); attachmentSvc != nil {
		taskhandlers.RegisterAttachmentRoutes(p.router, attachmentSvc, p.log)
	} else {
		p.log.Warn("prompt attachment routes disabled: attachment service is unavailable")
	}
	taskhandlers.RegisterWorkspaceRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.log)
	taskhandlers.RegisterMemberRoutes(p.router, p.taskSvc, p.log)
	if p.services != nil && p.services.Org != nil {
		org.NewController(p.services.Org, p.log).RegisterRoutes(p.router)
	}
	if p.services.OrgUnits != nil {
		orgunit.NewController(p.services.OrgUnits, p.log).RegisterRoutes(p.router)
	}
	if p.services != nil {
		registerMentionRoutes(p.router, p.services.Mentions)
	}
	workflowH := taskhandlers.RegisterWorkflowRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.services.Workflow, p.log)
	workflowH.SetForegroundActivityProvider(p.orchestratorSvc)
	taskH := taskhandlers.RegisterTaskRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.orchestratorSvc, p.taskRepo, planService, p.log)
	if p.services != nil && p.services.User != nil {
		taskH.SetTaskCreateLastUsedRecorder(p.services.User)
		taskH.SetAgentProfileRecentUseRecorder(p.services.User)
	}
	if handoffSvc != nil {
		taskH.SetHandoffService(handoffSvc)
	}
	if p.workspaceRestorer != nil {
		taskH.SetWorkspaceQuarantineRestorer(p.workspaceRestorer)
	}
	if p.services.GitHub != nil {
		ghSvc := p.services.GitHub
		taskH.SetOnTaskCreatedWithPR(func(ctx context.Context, taskID, sessionID, prURL, branch string) {
			// Task-create-from-PR runs once per task and the PR maps to the
			// primary repository (first task_repository row). Resolve to that
			// repository_id so the resulting TaskPR/PRWatch are scoped per-repo.
			repositoryID := resolvePrimaryTaskRepositoryID(ctx, p.taskRepo, taskID, p.log)
			task, taskErr := p.taskRepo.GetTask(ctx, taskID)
			if taskErr != nil || task == nil || task.WorkspaceID == "" {
				p.log.Warn("cannot associate GitHub PR without task workspace", zap.String("task_id", taskID), zap.Error(taskErr))
				return
			}
			if err := ghSvc.AssociatePRByURLForWorkspace(
				ctx, task.WorkspaceID, github.DefaultUserID,
				sessionID, taskID, repositoryID, prURL, branch,
			); err != nil {
				p.log.Warn("failed to associate task GitHub PR", zap.String("task_id", taskID), zap.Error(err))
			}
		})
	}
	taskhandlers.RegisterRepositoryRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.log)
	taskhandlers.RegisterRepositorySetRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.log)
	taskhandlers.RegisterRepositoryBranchPolicyRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.log)
	taskhandlers.RegisterExecutorRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.log)
	taskhandlers.RegisterExecutorProfileRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.agentList, p.log)
	taskhandlers.RegisterEnvironmentRoutes(p.router, p.gateway.Dispatcher, p.taskSvc, p.log)
	var referenceValidators []entityrefs.SubmissionValidator
	if p.services != nil && p.services.Mentions != nil && p.services.Mentions.Submission != nil {
		referenceValidators = append(referenceValidators, p.services.Mentions.Submission)
	}
	taskhandlers.RegisterMessageRoutes(
		p.router, p.gateway.Dispatcher, p.taskSvc,
		&orchestratorWrapper{svc: p.orchestratorSvc}, p.log, referenceValidators...,
	)
	processHandlers := taskhandlers.RegisterProcessRoutes(p.router, p.taskSvc, p.lifecycleMgr, p.log)
	taskhandlers.RegisterWorkspaceFileRoutes(p.router, processHandlers)
	analyticshandlers.RegisterStatsRoutes(p.router, p.analyticsRepo, p.taskSvc, p.log)
	agenthandlers.RegisterShellRoutes(p.router, p.lifecycleMgr, p.log)
	if p.services.Share != nil {
		p.services.Share.RegisterRoutes(p.router)
		p.log.Debug("Registered Public Share Links handlers (HTTP)")
	}
	p.log.Debug("Registered Task Service handlers (HTTP + WebSocket)")
}

// registerSecondaryRoutes registers workflow, agent settings, user, notification, editor,
// prompt, clarification, MCP, and debug routes.
func registerSecondaryRoutes(
	p routeParams,
	workflowCtrl *workflowcontroller.Controller,
	clarificationStore *clarification.Store,
	clarificationCanceller *clarification.Canceller,
	clarificationResolver *clarification.Resolver,
	planService *taskservice.PlanService,
	handoffSvc *taskservice.HandoffService,
) {
	workflowhandlers.RegisterRoutes(p.router, p.gateway.Dispatcher, workflowCtrl, p.eventBus, p.log)
	p.log.Info("Registered Workflow handlers (HTTP + WebSocket)")

	agentsettingshandlers.RegisterRoutes(p.router, p.agentSettingsController, p.gateway.Hub, p.log, p.interimSettingsInterlockToken)
	p.log.Debug("Registered Agent Settings handlers (HTTP)")

	// Login PTY: spawns agent login commands under a PTY on the kandev host
	// (claude auth login, auggie login, ...). The manager is shared with Quick
	// Terminal so descriptor lifecycle callbacks observe the same sessions.
	loginHandlers := loginpty.NewHandlers(p.loginMgr, p.agentRegistry, p.log.Zap(), nil)
	if p.quickTerminalSvc != nil {
		// Guard the assignment: passing a nil *quickterminal.Service straight
		// into the interface would create a typed-nil binder that is non-nil to
		// the handler's nil check but panics when invoked.
		loginHandlers.SetHostShellSessionBinder(p.quickTerminalSvc)
	}
	loginHandlers.RegisterRoutes(p.router)
	if p.quickTerminalSvc != nil {
		p.quickTerminalSvc.RegisterRoutes(p.router)
	}
	p.log.Debug("Registered Login PTY handlers (HTTP + WebSocket)")

	userhandlers.RegisterRoutes(p.router, p.gateway.Dispatcher, p.userCtrl, p.log)
	p.log.Debug("Registered User handlers (HTTP + WebSocket)")

	notificationhandlers.RegisterRoutes(p.router, p.notificationCtrl, p.log)
	p.log.Debug("Registered Notification handlers (HTTP)")

	editorhandlers.RegisterRoutes(p.router, p.editorCtrl, p.log)
	p.log.Debug("Registered Editors handlers (HTTP)")

	prompthandlers.RegisterRoutes(p.router, p.promptCtrl, p.log)
	p.log.Debug("Registered Prompts handlers (HTTP)")

	utilityhandlers.RegisterRoutes(p.router, p.utilityCtrl, p.lifecycleMgr, p.hostUtilityMgr, p.services.User, p.log)
	p.log.Debug("Registered Utility Agents handlers (HTTP)")

	agentcapabilities.RegisterRoutes(p.router, p.hostUtilityMgr, p.log)
	p.log.Debug("Registered Agent Capabilities handlers (HTTP)")

	clarification.RegisterRoutes(
		p.router,
		clarificationStore,
		p.gateway.Hub,
		p.msgCreator,
		p.taskRepo,
		p.eventBus,
		clarificationResolver,
		p.log,
	)
	p.log.Debug("Registered Clarification handlers (HTTP)")

	// Wire the plugin Host interaction write path (ADR 0052) onto the same
	// orchestrator permission resolution and the same clarification resolver
	// instance the REST route and the MCP handlers use, so a plugin's response
	// is indistinguishable from a user's and takes the same durable claim.
	// Deliberately here rather than in initOfficeServices: that returns early
	// when features.office=false (the production default), while plugins run
	// whenever services.Plugins is non-nil.
	if p.services.Plugins != nil {
		p.services.Plugins.SetInteractionResponder(pluginsInteractionResponderAdapter{
			permissions:    p.orchestratorSvc,
			clarifications: clarificationResolver,
		})
	}

	if p.secretsSvc != nil {
		secrets.RegisterRoutes(p.router, p.gateway.Dispatcher, p.secretsSvc, p.log)
		p.log.Debug("Registered Secrets handlers (HTTP + WebSocket)")
	}

	if p.secretStore != nil {
		spriteshandlers.RegisterRoutes(p.router, p.gateway.Dispatcher, p.secretStore, p.log)
		p.log.Debug("Registered Sprites handlers (HTTP + WebSocket)")
	}

	if p.taskRepo != nil {
		kuberneteshandlers.RegisterRoutes(
			p.router,
			p.gateway.Dispatcher,
			p.taskRepo,
			p.services.Task,
			p.log,
		)
		p.log.Debug("Registered Kubernetes handlers (HTTP + WebSocket)")

		sshhandlers.RegisterRoutes(
			p.router,
			p.gateway.Dispatcher,
			p.taskRepo,
			p.services.Task,
			p.agentRegistry,
			lifecycle.NewAgentctlResolver(p.log),
			p.log,
		)
		p.log.Debug("Registered SSH handlers (HTTP + WebSocket)")
	}

	if p.services.GitHub != nil {
		github.RegisterRoutes(p.router, p.gateway.Dispatcher, p.services.GitHub, p.log)
		github.RegisterMockRoutes(p.router, p.services.GitHub, p.log)
		p.log.Debug("Registered GitHub handlers (HTTP + WebSocket)")
	}

	if p.services.GitLab != nil {
		gitlab.RegisterRoutesWithDispatcher(p.router, p.gateway.Dispatcher, p.services.GitLab, p.log)
		gitlab.RegisterMockRoutes(p.router, p.services.GitLab, p.log)
		p.log.Debug("Registered GitLab handlers (HTTP + WebSocket)")
	}

	if p.services.AzureDevOps != nil {
		azuredevops.RegisterRoutes(p.router, p.services.AzureDevOps, p.log)
		azuredevops.RegisterMockRoutes(p.router, p.services.AzureDevOps, p.log)
		p.log.Debug("Registered Azure DevOps handlers (HTTP)")
	}

	if p.services.Jira != nil {
		jira.RegisterRoutes(p.router, p.gateway.Dispatcher, p.services.Jira, p.log)
		jira.RegisterMockRoutes(p.router, p.services.Jira, p.log)
		p.log.Debug("Registered JIRA handlers (HTTP + WebSocket)")
	}

	if p.services.Linear != nil {
		linear.RegisterRoutes(p.router, p.gateway.Dispatcher, p.services.Linear, p.log)
		linear.RegisterMockRoutes(p.router, p.services.Linear, p.log)
		p.log.Debug("Registered Linear handlers (HTTP + WebSocket)")
	}

	if p.services.Sentry != nil {
		sentry.RegisterRoutes(p.router, p.gateway.Dispatcher, p.services.Sentry, p.log)
		sentry.RegisterMockRoutes(p.router, p.services.Sentry, p.log)
		p.log.Debug("Registered Sentry handlers (HTTP)")
	}

	if p.services.WorkflowSync != nil {
		workflowsync.RegisterRoutes(p.router, p.services.WorkflowSync, p.log)
		p.log.Debug("Registered workflow sync handlers (HTTP)")
	}

	if p.services.Automation != nil {
		automation.RegisterRoutes(p.router, p.gateway.Dispatcher, p.services.Automation.Service, p.log)
		p.log.Debug("Registered Automation handlers (HTTP + WebSocket)")
	}

	if p.services.Plugins != nil {
		if p.authSvc != nil {
			// Lets an auth-capable plugin complete OIDC/SAML SSO: it asserts a
			// validated external identity on its webhook response and the host
			// mints + sets the session cookie (the plugin never sees the token).
			p.services.Plugins.SetAuthLoginBridge(pluginSSOBridge{auth: p.authSvc})
		}
		plugins.RegisterRoutes(p.router, p.services.Plugins, p.services.Plugins.Deliverer(), p.log)
		p.log.Debug("Registered Plugins handlers (HTTP)")
	}

	docker.RegisterDockerRoutes(
		p.router, p.lifecycleMgr.DockerClientProvider(),
		dockerTaskTitleProvider(p.taskRepo, p.log), dockerSessionAuthorizer(p.taskSvc), p.log,
	)
	p.log.Debug("Registered Docker management handlers (HTTP)")

	registerHealthRoutes(p)
	registerSystemRoutes(p)
	if p.runtimeFlagsSvc != nil {
		runtimeflags.RegisterRoutes(p.router, p.runtimeFlagsSvc)
	}

	if p.repoCloner != nil {
		var ghCopier improvekandev.GitHubWorkspaceCopier
		var resolveDefaultWorkspace improvekandev.DefaultWorkspaceResolver
		if p.services.GitHub != nil && p.dbPool != nil {
			ghCopier = p.services.GitHub
			resolveDefaultWorkspace = func(context.Context) (string, error) {
				return workspacescope.ResolveMigrationTarget(p.dbPool.Reader())
			}
		}
		ikHandler := improvekandev.NewHandler(p.taskSvc, p.repoCloner, ghCopier, resolveDefaultWorkspace, p.version, p.log)
		if p.services.GitHub != nil {
			ikHandler.SetManagedGitHubForkProber(p.services.GitHub)
		}
		ikHandler.SetTemporaryArtifactRegistry(p.temporaryArtifacts)
		if p.systemSvc != nil {
			ikHandler.SetLogBundles(p.systemSvc.LogBundles)
		}
		improvekandev.RegisterRoutes(p.router, ikHandler)
		p.log.Debug("Registered Improve Kandev handlers (HTTP)")
	}

	registerMCPAndDebugRoutes(p, workflowCtrl, clarificationStore, clarificationCanceller, clarificationResolver, planService, handoffSvc)

	var automationSvc *automation.Service
	if p.services.Automation != nil {
		automationSvc = p.services.Automation.Service
	}
	registerE2EResetRoutes(
		p.router, p.taskRepo, p.taskSvc, automationSvc, p.services.GitHub, p.services.GitLab, p.eventBus, p.log,
	)

	if officetestharness.Enabled() {
		var officeAgentSvc *officeagents.AgentService
		if p.services.OfficeSvcs != nil {
			officeAgentSvc = p.services.OfficeSvcs.Agents
		}
		officetestharness.RegisterRoutes(
			p.router,
			p.taskRepo,
			p.officeRepo,
			p.agentSettingsRepo,
			officeAgentSvc,
			p.eventBus,
			p.log,
		)
		p.log.Info("E2E mock routes enabled at /api/v1/_test/* — DO NOT enable in production")
	}

	// Register office routes
	if p.services.OfficeSvcs != nil {
		mountOfficeRoutes(p.router, p.services.OfficeSvcs, p.authSvc, p.taskSvc, p.officeRepo, handoffSvc, p.log)
		p.log.Debug("Registered Office handlers (HTTP)")
	}
}

// integrationWorkspacePrefixes are the workspace-scoped third-party
// integration route groups. Their config/watch/data routes are keyed by a
// caller-supplied workspace_id (query, or a /workspaces/:id/ path segment on
// gitlab) with no per-user gate of their own, so this global middleware
// authorizes ownership for them when auth is enabled.
var integrationWorkspacePrefixes = []string{
	"/api/v1/jira/", "/api/v1/linear/", "/api/v1/sentry/",
	"/api/v1/azure-devops/", "/api/v1/gitlab/", "/api/v1/github/", "/api/v1/workflow-sync/",
}

// integrationWorkspaceScopeMiddleware enforces workspace ownership on the
// third-party integration route groups (opt-in auth). Their handlers read the
// workspace from the request; internal pollers call the services directly (no
// identity) and are unaffected. Mock subroutes (/api/v1/<x>/mock/...) are only
// mounted in e2e/dev and carry no real credentials, but they still route
// through here — the ownership check is harmless there because e2e runs with
// auth disabled.
func integrationWorkspaceScopeMiddleware(authSvc *auth.Service, taskSvc *taskservice.Service) gin.HandlerFunc {
	return func(c *gin.Context) {
		if authSvc == nil || authSvc.Mode() == auth.ModeDisabled {
			c.Next()
			return
		}
		path := c.Request.URL.Path
		if !hasIntegrationPrefix(path) {
			c.Next()
			return
		}
		wsID := c.Query("workspace_id")
		if wsID == "" {
			wsID = workspaceIDFromPath(path)
		}
		if wsID == "" {
			c.Next()
			return
		}
		if err := taskSvc.AuthorizeWorkspaceAccess(c.Request.Context(), wsID); err != nil {
			c.AbortWithStatusJSON(http.StatusNotFound, gin.H{"error": "workspace not found"})
			return
		}
		c.Next()
	}
}

func hasIntegrationPrefix(path string) bool {
	for _, prefix := range integrationWorkspacePrefixes {
		if strings.HasPrefix(path, prefix) {
			return true
		}
	}
	return false
}

// workspaceIDFromPath extracts the ID from a `/workspaces/<id>/...` path
// segment (gitlab's GET /api/v1/gitlab/workspaces/:workspaceID/task-mrs).
func workspaceIDFromPath(path string) string {
	const marker = "/workspaces/"
	idx := strings.Index(path, marker)
	if idx < 0 {
		return ""
	}
	rest := path[idx+len(marker):]
	if slash := strings.IndexByte(rest, '/'); slash >= 0 {
		return rest[:slash]
	}
	return rest
}

// dockerSessionAuthorizer scopes the Docker management endpoints to the
// caller's own task sessions. Returning an untyped nil when the task service
// is absent (partial builds) keeps the handlers failing closed instead of
// calling through a typed-nil interface.
func dockerSessionAuthorizer(taskSvc *taskservice.Service) docker.SessionAuthorizer {
	if taskSvc == nil {
		return nil
	}
	return taskSvc
}

// lifecycleAccessAuthorizer is the task-service surface the lifecycle manager's
// per-user visibility checks are wired to. Narrowed to an interface so the
// wiring itself is testable: the three single-ID checkers take the same
// signature, so a crossed wire (session visibility installed in the task slot,
// say) compiles and silently authorizes the wrong resource.
type lifecycleAccessAuthorizer interface {
	AuthorizeSessionAccess(ctx context.Context, sessionID string) error
	AuthorizeEnvironmentAccess(ctx context.Context, taskEnvironmentID string) error
	AuthorizeTaskAccess(ctx context.Context, taskID string) error
	AuthorizeTaskEnvironmentAccess(ctx context.Context, taskID, taskEnvironmentID string) error
	AuthorizeSessionScope(ctx context.Context, sessionID string, scope authz.Scope) error
	AuthorizeEnvironmentScope(ctx context.Context, taskEnvironmentID string, scope authz.Scope) error
}

// wireLifecycleAccessCheckers installs every per-user visibility check on the
// lifecycle manager. Kept together so a surface that needs a new kind of check
// has one place to add it, rather than another setter call somewhere else in
// startup that nothing asserts on.
func wireLifecycleAccessCheckers(lifecycleMgr *lifecycle.Manager, access lifecycleAccessAuthorizer) {
	lifecycleMgr.SetSessionAccessChecker(access.AuthorizeSessionAccess)
	lifecycleMgr.SetEnvironmentAccessChecker(access.AuthorizeEnvironmentAccess)
	lifecycleMgr.SetTaskAccessChecker(access.AuthorizeTaskAccess)
	lifecycleMgr.SetTaskEnvironmentAccessChecker(access.AuthorizeTaskEnvironmentAccess)
	// Execution surfaces (terminal, shell, file writes, VS Code, port
	// previews) require session.exec, which a viewer does not hold. They are
	// keyed either by session or by environment, so both slots get one.
	lifecycleMgr.SetSessionExecAccessChecker(func(ctx context.Context, sessionID string) error {
		return access.AuthorizeSessionScope(ctx, sessionID, authz.ScopeSessionExec)
	})
	lifecycleMgr.SetEnvironmentExecAccessChecker(func(ctx context.Context, environmentID string) error {
		return access.AuthorizeEnvironmentScope(ctx, environmentID, authz.ScopeSessionExec)
	})
}

func dockerTaskTitleProvider(taskRepo *sqliterepo.Repository, log *logger.Logger) docker.TaskTitleProvider {
	return func(ctx context.Context, taskID string) (string, bool) {
		if taskRepo == nil || taskID == "" {
			return "", false
		}
		task, err := taskRepo.GetTask(ctx, taskID)
		if err != nil {
			log.Debug("docker container task title lookup failed",
				zap.String("task_id", taskID), zap.Error(err))
			return "", false
		}
		return task.Title, task.Title != ""
	}
}

// registerSystemRoutes mounts the System pages backend onto /api/v1/system/*.
// The system service is constructed upstream (startGatewayAndServe) so the
// updates-poller goroutine can be started with the main run context; here we
// only register HTTP handlers. The systemSvc field is nil during partial
// builds (tests, CLI subcommands) — registration is then a no-op.
func registerSystemRoutes(p routeParams) {
	if p.systemSvc == nil {
		return
	}
	p.systemSvc.RegisterRoutes(p.router, p.log)
}

// registerHealthRoutes sets up the system health endpoint with all health checkers.
func registerHealthRoutes(p routeParams) {
	var githubProvider health.GitHubStatusProvider
	var githubRateProvider health.GitHubRateLimitProvider
	if p.services.GitHub != nil {
		githubProvider = githubWorkspaceHealthAdapter{svc: p.services.GitHub}
		githubRateProvider = githubRateLimitAdapter{svc: p.services.GitHub}
	}
	githubChecker := health.NewGitHubChecker(githubProvider)
	if githubRateProvider != nil {
		githubChecker.WithRateLimitProvider(githubRateProvider)
	}
	osLimitsChecker := health.NewCachedChecker(
		oslimits.NewOSLimitsChecker(oslimits.NewInotifyProbe()),
		5*time.Minute,
	)
	checkers := []health.Checker{
		health.NewGitExecutableChecker(),
		githubChecker,
		health.NewAgentChecker(p.agentSettingsController),
		osLimitsChecker,
	}
	if p.systemSvc != nil && p.systemSvc.StorageRuntime != nil {
		checkers = append(checkers, p.systemSvc.StorageRuntime)
	}
	healthSvc := health.NewService(p.log, checkers...)
	health.RegisterRoutes(p.router, healthSvc, p.log)
}

type githubWorkspaceHealthAdapter struct {
	svc *github.Service
}

func (a githubWorkspaceHealthAdapter) GitHubConnectionHealth(
	ctx context.Context,
) (health.GitHubConnectionHealth, error) {
	if a.svc == nil {
		return health.GitHubConnectionHealth{}, github.ErrGitHubNotConfigured
	}
	summary, err := a.svc.GetWorkspaceConnectionHealth(ctx)
	if err != nil {
		return health.GitHubConnectionHealth{}, err
	}
	return health.GitHubConnectionHealth{
		Active:    summary.Active,
		Invalid:   summary.Invalid,
		Suspended: summary.Suspended,
		Revoked:   summary.Revoked,
	}, nil
}

// githubRateLimitAdapter bridges the github.Service's per-resource exhaustion
// snapshot to the structural shape consumed by the health package without
// importing health into github (cycle).
type githubRateLimitAdapter struct {
	svc *github.Service
}

func (a githubRateLimitAdapter) ExhaustedRateLimits() []health.GitHubRateLimitStatus {
	if a.svc == nil {
		return nil
	}
	src := a.svc.ExhaustedRateLimits()
	if len(src) == 0 {
		return nil
	}
	out := make([]health.GitHubRateLimitStatus, len(src))
	for i, s := range src {
		out[i] = health.GitHubRateLimitStatus{Resource: s.Resource, ResetAt: s.ResetAt}
	}
	return out
}

// mcpTaskPRListerAdapter adapts *github.Service to the MCP handlers'
// TaskPRLister interface so list_tasks responses can carry per-task PR
// summaries. Returns an empty map when the github service is nil.
type mcpTaskPRListerAdapter struct {
	gh *github.Service
}

func (a mcpTaskPRListerAdapter) ListTaskPRsByTaskIDs(
	ctx context.Context, taskIDs []string,
) (map[string][]mcphandlers.TaskPRInfo, error) {
	out := make(map[string][]mcphandlers.TaskPRInfo)
	if a.gh == nil || len(taskIDs) == 0 {
		return out, nil
	}
	prs, err := a.gh.ListTaskPRsByTaskIDs(ctx, taskIDs)
	if err != nil {
		return nil, err
	}
	for taskID, list := range prs {
		infos := make([]mcphandlers.TaskPRInfo, 0, len(list))
		for _, pr := range list {
			if pr == nil {
				continue
			}
			infos = append(infos, mcphandlers.TaskPRInfo{
				Number:   pr.PRNumber,
				URL:      pr.PRURL,
				Title:    pr.PRTitle,
				State:    pr.State,
				MergedAt: pr.MergedAt,
			})
		}
		if len(infos) > 0 {
			out[taskID] = infos
		}
	}
	return out, nil
}

// registerMCPAndDebugRoutes registers MCP and debug routes and wires the MCP handler.
func registerMCPAndDebugRoutes(
	p routeParams,
	wfCtrl *workflowcontroller.Controller,
	clarificationStore *clarification.Store,
	clarificationCanceller *clarification.Canceller,
	clarificationResolver *clarification.Resolver,
	planService *taskservice.PlanService,
	handoffSvc *taskservice.HandoffService,
) {
	walkthroughService := taskservice.NewWalkthroughService(p.taskRepo, p.eventBus, p.log)
	walkthroughService.SetTaskAuthorizer(p.taskSvc.AuthorizeTaskAccess)
	mcpHandlers := mcphandlers.NewHandlers(
		p.taskSvc, wfCtrl,
		clarificationStore, clarificationCanceller, p.msgCreator, p.taskRepo, p.taskRepo, p.eventBus, planService, walkthroughService, p.orchestratorSvc, p.orchestratorSvc.GetMessageQueue(), p.log,
	)
	mcpHandlers.SetPluginService(p.services.Plugins)
	mcpHandlers.SetRemoteContributionService(newRemoteContributionCoordinator(p.services.GitHub, p.services.GitLab))
	// Wire config-mode dependencies for agent-native configuration
	mcpHandlers.SetConfigDeps(p.services.Workflow, p.agentSettingsController, p.mcpConfigSvc)
	mcpHandlers.SetClarificationInputPauser(p.orchestratorSvc)
	mcpHandlers.SetPromptReferenceResolver(p.services.Prompts)
	mcpHandlers.SetPromptReader(p.services.Prompts)
	mcpHandlers.SetTaskStopper(p.orchestratorSvc)
	mcpHandlers.SetAgentPermissionService(p.orchestratorSvc)
	mcpHandlers.SetTaskTitleBranchRenamer(p.orchestratorSvc)
	mcpHandlers.SetUserSettingsProvider(p.services.User)
	// list_pending_questions_kandev / answer_question_kandev (external MCP
	// surface only). p.taskRepo already implements ClarificationBundleLister
	// (ListUnresolvedClarificationBundles, FindMessagesByPendingID).
	mcpHandlers.SetClarificationResolver(clarificationResolver, p.taskRepo)
	if p.systemSvc != nil && p.systemSvc.LogBundles != nil {
		mcpHandlers.SetDiagnosticBundleServices(p.systemSvc.LogBundles, p.lifecycleMgr)
	}

	// Enrich list_tasks responses with associated GitHub PRs (link, title,
	// number, state) when the github service is available.
	if p.services.GitHub != nil {
		mcpHandlers.SetTaskPRLister(mcpTaskPRListerAdapter{gh: p.services.GitHub})
		mcpHandlers.SetTaskPRAutomationService(p.services.GitHub)
	}
	if p.services.GitLab != nil {
		mcpHandlers.SetTaskMRAutomationService(p.services.GitLab)
	}
	if p.services.OfficeSvcs != nil && p.services.OfficeSvcs.Dashboard != nil {
		mcpHandlers.SetDashboardService(p.services.OfficeSvcs.Dashboard)
	}

	// Reuse the cross-task handoff service constructed in registerRoutes —
	// the same instance backs the MCP path and the HTTP Kanban path so
	// workspace-group state stays consistent across both surfaces.
	if handoffSvc != nil {
		mcpHandlers.SetHandoffService(handoffSvc)
	}

	// Native code review. The runner owns background review passes, so it is
	// started here and drained on shutdown; the orchestrator gets it too, which
	// is what enables the run_code_review workflow step action.
	reviewParts := buildReviewComponents(p)
	mcpHandlers.SetReviewService(reviewParts.service)
	mcpHandlers.SetReviewRunner(reviewParts.runner)
	p.orchestratorSvc.SetReviewRunner(reviewParts.runner)
	reviewParts.runner.Start(context.Background())
	if p.addCleanup != nil {
		p.addCleanup(func() error {
			reviewParts.runner.Stop()
			return nil
		})
	}
	// Any pass still marked running belongs to a previous process. Close them so
	// the UI never shows a review that will never finish.
	if cancelled, err := p.taskRepo.CancelInFlightTaskReviewRuns(context.Background()); err != nil {
		p.log.Warn("failed to cancel interrupted review runs", zap.Error(err))
	} else if cancelled > 0 {
		p.log.Info("cancelled review runs interrupted by restart", zap.Int("count", cancelled))
	}
	p.log.Debug("Registered native code review (WebSocket + MCP)")

	mcpHandlers.RegisterHandlers(p.gateway.Dispatcher)
	p.log.Debug("Registered MCP handlers (WebSocket)")

	p.lifecycleMgr.SetMCPHandler(p.gateway.Dispatcher)
	p.log.Debug("MCP handler configured for agent lifecycle manager")

	// In-session MCP calls reach this same dispatcher over the agent's own WS
	// stream, which carries no credential. Always attach the server-derived
	// task/session principal so automation self/workspace boundaries remain in
	// force even when authentication is disabled or unavailable. Owner identity
	// scoping is conditional because single-user installs intentionally retain
	// their existing unscoped behavior.
	mcpScopeResolver := mcpscope.NewResolver(
		p.taskRepo,
		p.authSvc,
		func() bool { return p.authSvc != nil && p.authSvc.Mode() != auth.ModeDisabled },
		p.log,
	)
	p.lifecycleMgr.SetMCPPrincipalScoper(mcpScopeResolver.ScopePrincipal)
	if p.authSvc != nil {
		p.lifecycleMgr.SetMCPIdentityScoper(mcpScopeResolver.Scope)
		p.log.Debug("In-session MCP dispatch scoped to task owner")
	}

	// External MCP endpoint — exposes config tools + create_task to external coding
	// agents (Claude Code, Cursor, etc.) at /mcp on the backend HTTP server.
	registerExternalMCP(p)

	debughandlers.RegisterRoutes(p.router, p.log)
	p.log.Debug("Registered Debug handlers (HTTP)")

	if p.devMode {
		debughandlers.RegisterPprofRoutes(p.router, p.log)
		debughandlers.RegisterMemoryRoute(p.router, p.log)
		if p.dbPool != nil {
			db.RegisterWriterPoolStats(p.dbPool)
		}
	}
}

// registerExternalMCP mounts an MCP server on the backend HTTP router so external
// coding agents can connect to Kandev at /mcp, /mcp/sse, /mcp/message.
func registerExternalMCP(p routeParams) {
	port := p.httpPort
	if port == 0 {
		port = ports.Backend
	}
	baseURL := fmt.Sprintf("http://localhost:%d", port)

	backendClient := mcpserver.NewExternalDispatcherBackendClient(p.gateway.Dispatcher, p.log)
	srv := mcpserver.NewExternal(backendClient, p.log, "")
	mcpGroup := p.router.Group("", externalMCPAuthMiddleware(p.authSvc))
	srv.RegisterBackendRoutes(mcpGroup)
	if p.addCleanup != nil {
		p.addCleanup(func() error {
			ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
			defer cancel()
			return srv.Close(ctx)
		})
	}
	p.log.Info("Registered external MCP endpoint",
		zap.String("base_url", baseURL),
		zap.String("streamable_http", baseURL+"/mcp"),
		zap.String("sse", baseURL+"/mcp/sse"),
		zap.String("sse_message", baseURL+"/mcp/message"))
}

// externalMCPAuthMiddleware guards the external MCP endpoint (/mcp*). While
// authentication is disabled the endpoint stays open (today's behavior). Once
// auth is enabled, external coding agents must present a personal access
// token as an Authorization bearer — they have no browser session cookie.
func externalMCPAuthMiddleware(authSvc *auth.Service) gin.HandlerFunc {
	return func(c *gin.Context) {
		if authSvc == nil || authSvc.Mode() == auth.ModeDisabled {
			c.Next()
			return
		}
		// The global auth middleware may already have resolved a PAT (or a
		// browser session — useful for same-origin tooling).
		if _, ok := authn.FromGin(c); ok {
			c.Next()
			return
		}
		c.Header("WWW-Authenticate", "Bearer")
		c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
			"error": "external MCP requires a personal access token (Settings > Account > API tokens)",
		})
	}
}

// runGracefulShutdown gracefully stops all services and runs cleanups.
func runGracefulShutdown(
	server *http.Server,
	listeners *serverListeners,
	scheduling *schedulingRuntime,
	orchestratorSvc *orchestrator.Service,
	lifecycleMgr *lifecycle.Manager,
	runCleanups func(),
	log *logger.Logger,
) []error {
	start := time.Now()
	var shutdownErrs []error
	log.Info("Graceful shutdown started",
		zap.Int("http_timeout_seconds", int(httpShutdownTimeout/time.Second)),
		zap.Int("agent_timeout_seconds", int(agentShutdownTimeout/time.Second)),
		zap.Int("tracing_timeout_seconds", int(tracingShutdownTimeout/time.Second)))

	// Stop the background bind-retry loop before Shutdown so no new listener
	// can be created after the server begins closing its listeners.
	if listeners != nil {
		listeners.Stop()
	}

	shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), httpShutdownTimeout)
	defer shutdownCancel()

	if err := server.Shutdown(shutdownCtx); err != nil {
		shutdownErrs = append(shutdownErrs, err)
		log.Error("HTTP server shutdown error", zap.Error(err))
	}

	if err := scheduling.Stop(); err != nil {
		shutdownErrs = append(shutdownErrs, err)
		log.Error("Scheduler stop error", zap.Error(err))
	}

	if orchestratorSvc != nil {
		if err := orchestratorSvc.Stop(); err != nil {
			shutdownErrs = append(shutdownErrs, err)
			log.Error("Orchestrator stop error", zap.Error(err))
		}
	}

	if err := stopLifecycleManager(lifecycleMgr, log); err != nil {
		shutdownErrs = append(shutdownErrs, err)
	}
	runCleanups()

	// Flush pending OTel spans before exit
	traceCtx, traceCancel := context.WithTimeout(context.Background(), tracingShutdownTimeout)
	if err := tracing.Shutdown(traceCtx); err != nil {
		shutdownErrs = append(shutdownErrs, err)
		log.Error("Tracer shutdown error", zap.Error(err))
	}
	traceCancel()

	log.Info("Graceful shutdown complete",
		zap.Duration("duration", time.Since(start)),
		zap.Int("error_count", len(shutdownErrs)))
	_ = log.Sync()
	return shutdownErrs
}

// stopLifecycleManager gracefully stops all agents and the lifecycle manager.
func stopLifecycleManager(lifecycleMgr *lifecycle.Manager, log *logger.Logger) error {
	if lifecycleMgr == nil {
		return nil
	}
	var shutdownErrs []error
	log.Info("Stopping agents gracefully",
		zap.Int("timeout_seconds", int(agentShutdownTimeout/time.Second)))
	stopCtx, stopCancel := context.WithTimeout(context.Background(), agentShutdownTimeout)
	if err := lifecycleMgr.StopAllAgents(stopCtx); err != nil {
		shutdownErrs = append(shutdownErrs, err)
		log.Error("Graceful agent stop error", zap.Error(err))
	}
	stopCancel()

	if err := lifecycleMgr.Stop(); err != nil {
		shutdownErrs = append(shutdownErrs, err)
		log.Error("Lifecycle manager stop error", zap.Error(err))
	}
	if len(shutdownErrs) == 0 {
		log.Info("Agents stopped gracefully")
	}
	return errors.Join(shutdownErrs...)
}