package store

import (
	"context"
	"database/sql"
	"encoding/json"
	"errors"
	"fmt"
	"strings"
	"time"

	"github.com/google/uuid"
	"github.com/jmoiron/sqlx"
	"go.uber.org/zap"

	"github.com/kandev/kandev/internal/agent/settings/models"
	"github.com/kandev/kandev/internal/agent/settings/profileconfig"
	"github.com/kandev/kandev/internal/common/logger"
	"github.com/kandev/kandev/internal/db"
	"github.com/kandev/kandev/internal/db/dialect"
)

type sqliteRepository struct {
	db      *sqlx.DB // writer
	ro      *sqlx.DB // reader
	ownsDB  bool
	log     *logger.Logger
	migrate *db.MigrateLogger
}

var _ Repository = (*sqliteRepository)(nil)

func newSQLiteRepositoryWithDB(writer, reader *sqlx.DB, log *logger.Logger) (*sqliteRepository, error) {
	return newSQLiteRepository(writer, reader, log, false)
}

func newSQLiteRepository(writer, reader *sqlx.DB, log *logger.Logger, ownsDB bool) (*sqliteRepository, error) {
	repo := &sqliteRepository{
		db:      writer,
		ro:      reader,
		ownsDB:  ownsDB,
		log:     log,
		migrate: db.NewMigrateLogger(writer, log),
	}
	if err := repo.initSchema(); err != nil {
		if ownsDB {
			if closeErr := writer.Close(); closeErr != nil {
				return nil, fmt.Errorf("failed to close database after schema error: %w", closeErr)
			}
		}
		return nil, fmt.Errorf("failed to initialize schema: %w", err)
	}
	return repo, nil
}

func (r *sqliteRepository) initSchema() error {
	schema := `
	CREATE TABLE IF NOT EXISTS agents (
		id TEXT PRIMARY KEY,
		name TEXT NOT NULL,
		workspace_id TEXT DEFAULT NULL,
		supports_mcp INTEGER NOT NULL DEFAULT 0,
		mcp_config_path TEXT DEFAULT '',
		created_at TIMESTAMP NOT NULL,
		updated_at TIMESTAMP NOT NULL
	);

	CREATE TABLE IF NOT EXISTS agent_profiles (
		id TEXT PRIMARY KEY,
		agent_id TEXT NOT NULL,
		name TEXT NOT NULL,
		agent_display_name TEXT NOT NULL,
		model TEXT NOT NULL DEFAULT '',
		mode TEXT DEFAULT NULL,
		migrated_from TEXT DEFAULT NULL,
		auto_approve INTEGER NOT NULL DEFAULT 0,
		dangerously_skip_permissions INTEGER NOT NULL DEFAULT 0,
		allow_indexing INTEGER NOT NULL DEFAULT 1,
		cli_passthrough INTEGER NOT NULL DEFAULT 0,
		user_modified INTEGER NOT NULL DEFAULT 0,
		plan TEXT DEFAULT '',
		cli_flags TEXT DEFAULT NULL,
		env_vars TEXT NOT NULL DEFAULT '[]',
		created_at TIMESTAMP NOT NULL,
		updated_at TIMESTAMP NOT NULL,
		deleted_at TIMESTAMP,
		workspace_id TEXT NOT NULL DEFAULT '',
		role TEXT NOT NULL DEFAULT '',
		icon TEXT NOT NULL DEFAULT '',
		reports_to TEXT NOT NULL DEFAULT '',
		skill_ids TEXT NOT NULL DEFAULT '[]',
		desired_skills TEXT NOT NULL DEFAULT '[]',
		custom_prompt TEXT NOT NULL DEFAULT '',
		status TEXT NOT NULL DEFAULT 'idle'
			CHECK (status IN ('idle','working','paused','stopped','pending_approval')),
		pause_reason TEXT NOT NULL DEFAULT '',
		last_run_finished_at TIMESTAMP,
		max_concurrent_sessions INTEGER NOT NULL DEFAULT 1,
		cooldown_sec INTEGER NOT NULL DEFAULT 0,
		skip_idle_runs INTEGER NOT NULL DEFAULT 0,
		consecutive_failures INTEGER NOT NULL DEFAULT 0,
		failure_threshold INTEGER NOT NULL DEFAULT 3,
		executor_preference TEXT NOT NULL DEFAULT '',
		budget_monthly_cents INTEGER NOT NULL DEFAULT 0,
		settings TEXT NOT NULL DEFAULT '{}',
		permissions TEXT NOT NULL DEFAULT '{}',
		FOREIGN KEY (agent_id) REFERENCES agents(id) ON DELETE CASCADE
	);

	CREATE TABLE IF NOT EXISTS agent_profile_mcp_configs (
		profile_id TEXT PRIMARY KEY,
		enabled INTEGER NOT NULL DEFAULT 0,
		servers_json TEXT NOT NULL DEFAULT '{}',
		meta_json TEXT NOT NULL DEFAULT '{}',
		created_at TIMESTAMP NOT NULL,
		updated_at TIMESTAMP NOT NULL,
		FOREIGN KEY (profile_id) REFERENCES agent_profiles(id) ON DELETE CASCADE
	);

	DROP INDEX IF EXISTS idx_agents_name;
	CREATE UNIQUE INDEX IF NOT EXISTS idx_agents_name ON agents(name);
	CREATE INDEX IF NOT EXISTS idx_agent_profiles_agent_id ON agent_profiles(agent_id);
	`
	// Note: indexes on new office-enrichment columns (workspace_id, role,
	// reports_to) are created later in migrateOfficeEnrichmentColumns —
	// after the columns themselves are added — so legacy databases don't
	// fail at CREATE INDEX before the ALTER TABLE statements have run.
	_, err := r.db.Exec(schema)
	if err != nil {
		return err
	}

	r.migrate.Apply("agents.tui_config", `ALTER TABLE agents ADD COLUMN tui_config TEXT DEFAULT NULL`)
	r.migrate.Apply("agent_profiles.mode", `ALTER TABLE agent_profiles ADD COLUMN mode TEXT DEFAULT NULL`)
	r.migrate.Apply("agent_profiles.migrated_from", `ALTER TABLE agent_profiles ADD COLUMN migrated_from TEXT DEFAULT NULL`)
	// Rows where cli_flags IS NULL are backfilled on first read - see scanAgentProfile.
	r.migrate.Apply("agent_profiles.cli_flags", `ALTER TABLE agent_profiles ADD COLUMN cli_flags TEXT DEFAULT NULL`)
	r.migrate.Apply("agent_profiles.env_vars", `ALTER TABLE agent_profiles ADD COLUMN env_vars TEXT NOT NULL DEFAULT '[]'`)

	// Migration: drop CHECK(model != '') constraint from agent_profiles.
	//
	// The ACP-first model means models and modes are populated from the host
	// utility probe cache at boot. An empty model is valid — it means "use the
	// agent's default". SQLite does not support ALTER COLUMN or DROP CONSTRAINT,
	// so we must recreate the table. This is idempotent: we check whether the
	// old CHECK constraint still exists before doing anything.
	if err := r.migrateDropModelCheckConstraint(); err != nil {
		return fmt.Errorf("failed to migrate agent_profiles model constraint: %w", err)
	}

	// Migration: ADR 0005 Wave A — enrich agent_profiles with office columns.
	// Each ALTER is idempotent — duplicate-column errors are swallowed.
	r.migrateOfficeEnrichmentColumns()

	return nil
}

// migrateOfficeEnrichmentColumns adds the office-enrichment columns introduced
// in ADR 0005 Wave A. Each ALTER is idempotent: errors raised when the column
// already exists are swallowed.
func (r *sqliteRepository) migrateOfficeEnrichmentColumns() {
	type migration struct {
		name string
		stmt string
	}
	migrations := []migration{
		{"agent_profiles.workspace_id", `ALTER TABLE agent_profiles ADD COLUMN workspace_id TEXT NOT NULL DEFAULT ''`},
		{"agent_profiles.role", `ALTER TABLE agent_profiles ADD COLUMN role TEXT NOT NULL DEFAULT ''`},
		{"agent_profiles.icon", `ALTER TABLE agent_profiles ADD COLUMN icon TEXT NOT NULL DEFAULT ''`},
		{"agent_profiles.reports_to", `ALTER TABLE agent_profiles ADD COLUMN reports_to TEXT NOT NULL DEFAULT ''`},
		{"agent_profiles.skill_ids", `ALTER TABLE agent_profiles ADD COLUMN skill_ids TEXT NOT NULL DEFAULT '[]'`},
		{"agent_profiles.desired_skills", `ALTER TABLE agent_profiles ADD COLUMN desired_skills TEXT NOT NULL DEFAULT '[]'`},
		{"agent_profiles.custom_prompt", `ALTER TABLE agent_profiles ADD COLUMN custom_prompt TEXT NOT NULL DEFAULT ''`},
		{"agent_profiles.status", `ALTER TABLE agent_profiles ADD COLUMN status TEXT NOT NULL DEFAULT 'idle'`},
		{"agent_profiles.pause_reason", `ALTER TABLE agent_profiles ADD COLUMN pause_reason TEXT NOT NULL DEFAULT ''`},
		{"agent_profiles.last_run_finished_at", `ALTER TABLE agent_profiles ADD COLUMN last_run_finished_at TIMESTAMP`},
		{"agent_profiles.max_concurrent_sessions", `ALTER TABLE agent_profiles ADD COLUMN max_concurrent_sessions INTEGER NOT NULL DEFAULT 1`},
		{"agent_profiles.cooldown_sec", `ALTER TABLE agent_profiles ADD COLUMN cooldown_sec INTEGER NOT NULL DEFAULT 0`},
		{"agent_profiles.skip_idle_runs", `ALTER TABLE agent_profiles ADD COLUMN skip_idle_runs INTEGER NOT NULL DEFAULT 0`},
		{"agent_profiles.consecutive_failures", `ALTER TABLE agent_profiles ADD COLUMN consecutive_failures INTEGER NOT NULL DEFAULT 0`},
		{"agent_profiles.failure_threshold", `ALTER TABLE agent_profiles ADD COLUMN failure_threshold INTEGER NOT NULL DEFAULT 3`},
		{"agent_profiles.executor_preference", `ALTER TABLE agent_profiles ADD COLUMN executor_preference TEXT NOT NULL DEFAULT ''`},
		{"agent_profiles.budget_monthly_cents", `ALTER TABLE agent_profiles ADD COLUMN budget_monthly_cents INTEGER NOT NULL DEFAULT 0`},
		{"agent_profiles.settings", `ALTER TABLE agent_profiles ADD COLUMN settings TEXT NOT NULL DEFAULT '{}'`},
		{"agent_profiles.permissions", `ALTER TABLE agent_profiles ADD COLUMN permissions TEXT NOT NULL DEFAULT '{}'`},
	}
	for _, m := range migrations {
		r.migrate.Apply(m.name, m.stmt)
	}
	// Indexes are idempotent via IF NOT EXISTS, but the partial-index variant
	// required for role/reports_to needs the column to exist first - so create
	// here after the ALTERs to handle databases upgraded from older schemas.
	_, _ = r.db.Exec(`CREATE INDEX IF NOT EXISTS idx_agent_profiles_workspace ON agent_profiles(workspace_id)`)
	_, _ = r.db.Exec(`CREATE INDEX IF NOT EXISTS idx_agent_profiles_role ON agent_profiles(workspace_id, role) WHERE role != ''`)
	_, _ = r.db.Exec(`CREATE INDEX IF NOT EXISTS idx_agent_profiles_reports_to ON agent_profiles(reports_to) WHERE reports_to != ''`)
}

// migrateDropModelCheckConstraint recreates agent_profiles without the legacy
// non-empty-model CHECK constraint. Existing databases created before the
// ACP-first migration carry this constraint, which prevents empty model
// values. New databases (created by the CREATE TABLE IF NOT EXISTS above)
// never have it.
//
// The migration is idempotent: it inspects sqlite_master for the CHECK keyword
// and only proceeds when the constraint is present.
func (r *sqliteRepository) migrateDropModelCheckConstraint() error {
	if dialect.IsPostgres(r.db.DriverName()) {
		return nil
	}

	var tableDDL string
	err := r.db.QueryRow(
		`SELECT sql FROM sqlite_master WHERE type='table' AND name='agent_profiles'`,
	).Scan(&tableDDL)
	if errors.Is(err, sql.ErrNoRows) {
		// Table doesn't exist yet (fresh DB, CREATE TABLE IF NOT EXISTS
		// hasn't run or was a no-op) — nothing to migrate.
		return nil
	}
	if err != nil {
		return fmt.Errorf("query agent_profiles DDL: %w", err)
	}

	// Only migrate if the old model CHECK constraint is still present.
	// Use a targeted match to avoid false-positives from unrelated future
	// CHECK constraints on the same table.
	if !strings.Contains(tableDDL, "CHECK(model") {
		return nil
	}

	if err := r.recreateAgentProfilesWithoutModelCheck(); err != nil {
		return err
	}
	if r.log != nil {
		r.log.Info("migration applied", zap.String("name", "agent_profiles.recreate_drop_model_check"))
	}
	return nil
}

// recreateAgentProfilesWithoutModelCheck performs the actual SQLite table
// recreation: copy data into a new table without the CHECK constraint, drop
// the old table, rename the new one. Wrapped in a transaction so a crash
// mid-migration doesn't leave the DB without the agent_profiles table.
func (r *sqliteRepository) recreateAgentProfilesWithoutModelCheck() error {
	// Disable FK enforcement during the recreation: the DB is opened with
	// _foreign_keys=on, and agent_profile_mcp_configs references
	// agent_profiles(id). This matches the pattern in task/repository.
	if _, err := r.db.Exec(`PRAGMA foreign_keys=OFF`); err != nil {
		return fmt.Errorf("disable foreign keys for migration: %w", err)
	}
	defer func() { _, _ = r.db.Exec(`PRAGMA foreign_keys=ON`) }()

	tx, err := r.db.Begin()
	if err != nil {
		return fmt.Errorf("begin migration tx: %w", err)
	}
	defer func() { _ = tx.Rollback() }()

	// The old table does not have cli_flags/env_vars yet (the ADD COLUMN ran earlier in
	// initSchema but on the old table, which is about to be dropped). So we
	// include it in the copy only when it exists on the source table.
	srcHasCLIFlags := columnExists(tx, "agent_profiles", "cli_flags")
	srcHasEnvVars := columnExists(tx, "agent_profiles", "env_vars")
	srcCols := `id, agent_id, name, agent_display_name, model, mode, migrated_from,
		auto_approve, dangerously_skip_permissions, allow_indexing,
		cli_passthrough, user_modified, plan, created_at, updated_at, deleted_at`
	dstCols := srcCols
	if srcHasCLIFlags {
		srcCols += ", cli_flags"
		dstCols += ", cli_flags"
	}
	if srcHasEnvVars {
		srcCols += ", env_vars"
		dstCols += ", env_vars"
	}

	if _, err := tx.Exec(`CREATE TABLE agent_profiles_new (
		id TEXT PRIMARY KEY,
		agent_id TEXT NOT NULL,
		name TEXT NOT NULL,
		agent_display_name TEXT NOT NULL,
		model TEXT NOT NULL DEFAULT '',
		mode TEXT DEFAULT NULL,
		migrated_from TEXT DEFAULT NULL,
		auto_approve INTEGER NOT NULL DEFAULT 0,
		dangerously_skip_permissions INTEGER NOT NULL DEFAULT 0,
		allow_indexing INTEGER NOT NULL DEFAULT 1,
		cli_passthrough INTEGER NOT NULL DEFAULT 0,
		user_modified INTEGER NOT NULL DEFAULT 0,
		plan TEXT DEFAULT '',
		cli_flags TEXT DEFAULT NULL,
		env_vars TEXT NOT NULL DEFAULT '[]',
		created_at TIMESTAMP NOT NULL,
		updated_at TIMESTAMP NOT NULL,
		deleted_at TIMESTAMP,
		FOREIGN KEY (agent_id) REFERENCES agents(id) ON DELETE CASCADE
	)`); err != nil {
		return fmt.Errorf("create new table: %w", err)
	}

	if _, err := tx.Exec(
		`INSERT INTO agent_profiles_new (` + dstCols + `) SELECT ` + srcCols + ` FROM agent_profiles`,
	); err != nil {
		return fmt.Errorf("copy data: %w", err)
	}

	if _, err := tx.Exec(`DROP TABLE agent_profiles`); err != nil {
		return fmt.Errorf("drop old table: %w", err)
	}

	if _, err := tx.Exec(`ALTER TABLE agent_profiles_new RENAME TO agent_profiles`); err != nil {
		return fmt.Errorf("rename new table: %w", err)
	}

	if _, err := tx.Exec(
		`CREATE INDEX IF NOT EXISTS idx_agent_profiles_agent_id ON agent_profiles(agent_id)`,
	); err != nil {
		return fmt.Errorf("recreate index: %w", err)
	}

	return tx.Commit()
}

func (r *sqliteRepository) Close() error {
	if !r.ownsDB {
		return nil
	}
	return r.db.Close()
}

func (r *sqliteRepository) CreateAgent(ctx context.Context, agent *models.Agent) error {
	if agent.ID == "" {
		agent.ID = uuid.New().String()
	}
	now := time.Now().UTC()
	agent.CreatedAt = now
	agent.UpdatedAt = now
	var tuiConfigJSON *string
	if agent.TUIConfig != nil {
		data, err := json.Marshal(agent.TUIConfig)
		if err != nil {
			return fmt.Errorf("failed to marshal tui_config: %w", err)
		}
		s := string(data)
		tuiConfigJSON = &s
	}
	_, err := r.db.ExecContext(ctx, r.db.Rebind(`
		INSERT INTO agents (id, name, workspace_id, supports_mcp, mcp_config_path, tui_config, created_at, updated_at)
		VALUES (?, ?, ?, ?, ?, ?, ?, ?)
	`), agent.ID, agent.Name, agent.WorkspaceID, dialect.BoolToInt(agent.SupportsMCP), agent.MCPConfigPath, tuiConfigJSON, agent.CreatedAt, agent.UpdatedAt)
	return err
}

func (r *sqliteRepository) GetAgent(ctx context.Context, id string) (*models.Agent, error) {
	row := r.ro.QueryRowContext(ctx, r.ro.Rebind(`
		SELECT id, name, workspace_id, supports_mcp, mcp_config_path, tui_config, created_at, updated_at
		FROM agents WHERE id = ?
	`), id)
	return scanAgent(row)
}

func (r *sqliteRepository) GetAgentByName(ctx context.Context, name string) (*models.Agent, error) {
	row := r.ro.QueryRowContext(ctx, r.ro.Rebind(`
		SELECT id, name, workspace_id, supports_mcp, mcp_config_path, tui_config, created_at, updated_at
		FROM agents WHERE name = ?
	`), name)
	return scanAgent(row)
}

func (r *sqliteRepository) UpdateAgent(ctx context.Context, agent *models.Agent) error {
	agent.UpdatedAt = time.Now().UTC()
	result, err := r.db.ExecContext(ctx, r.db.Rebind(`
		UPDATE agents SET workspace_id = ?, supports_mcp = ?, mcp_config_path = ?, updated_at = ?
		WHERE id = ?
	`), agent.WorkspaceID, dialect.BoolToInt(agent.SupportsMCP), agent.MCPConfigPath, agent.UpdatedAt, agent.ID)
	if err != nil {
		return err
	}
	rows, _ := result.RowsAffected()
	if rows == 0 {
		return fmt.Errorf("agent not found: %s", agent.ID)
	}
	return nil
}

func (r *sqliteRepository) DeleteAgent(ctx context.Context, id string) error {
	result, err := r.db.ExecContext(ctx, r.db.Rebind(`DELETE FROM agents WHERE id = ?`), id)
	if err != nil {
		return err
	}
	rows, _ := result.RowsAffected()
	if rows == 0 {
		return fmt.Errorf("agent not found: %s", id)
	}
	return nil
}

func (r *sqliteRepository) ListAgents(ctx context.Context) ([]*models.Agent, error) {
	return r.listAgentsWhere(ctx, "1=1")
}

func (r *sqliteRepository) GetAgentProfileMcpConfig(ctx context.Context, profileID string) (*models.AgentProfileMcpConfig, error) {
	row := r.ro.QueryRowContext(ctx, r.ro.Rebind(`
		SELECT profile_id, enabled, servers_json, meta_json, created_at, updated_at
		FROM agent_profile_mcp_configs
		WHERE profile_id = ?
	`), profileID)

	var config models.AgentProfileMcpConfig
	var enabled int
	var serversJSON string
	var metaJSON string
	if err := row.Scan(&config.ProfileID, &enabled, &serversJSON, &metaJSON, &config.CreatedAt, &config.UpdatedAt); err != nil {
		return nil, err
	}
	config.Enabled = enabled == 1
	if err := json.Unmarshal([]byte(serversJSON), &config.Servers); err != nil {
		return nil, fmt.Errorf("failed to parse MCP servers JSON: %w", err)
	}
	if err := json.Unmarshal([]byte(metaJSON), &config.Meta); err != nil {
		return nil, fmt.Errorf("failed to parse MCP meta JSON: %w", err)
	}
	return &config, nil
}

func (r *sqliteRepository) UpsertAgentProfileMcpConfig(ctx context.Context, config *models.AgentProfileMcpConfig) error {
	if config.ProfileID == "" {
		return fmt.Errorf("profile ID is required")
	}
	if config.Servers == nil {
		config.Servers = map[string]interface{}{}
	}
	if config.Meta == nil {
		config.Meta = map[string]interface{}{}
	}
	now := time.Now().UTC()
	if config.CreatedAt.IsZero() {
		config.CreatedAt = now
	}
	config.UpdatedAt = now

	serversJSON, err := json.Marshal(config.Servers)
	if err != nil {
		return fmt.Errorf("failed to serialize MCP servers: %w", err)
	}
	metaJSON, err := json.Marshal(config.Meta)
	if err != nil {
		return fmt.Errorf("failed to serialize MCP meta: %w", err)
	}

	_, err = r.db.ExecContext(ctx, r.db.Rebind(`
		INSERT INTO agent_profile_mcp_configs (profile_id, enabled, servers_json, meta_json, created_at, updated_at)
		VALUES (?, ?, ?, ?, ?, ?)
		ON CONFLICT(profile_id) DO UPDATE SET
			enabled = excluded.enabled,
			servers_json = excluded.servers_json,
			meta_json = excluded.meta_json,
			updated_at = excluded.updated_at
	`), config.ProfileID, dialect.BoolToInt(config.Enabled), string(serversJSON), string(metaJSON), config.CreatedAt, config.UpdatedAt)
	return err
}

func (r *sqliteRepository) CreateAgentProfile(ctx context.Context, profile *models.AgentProfile) error {
	if profile.ID == "" {
		profile.ID = uuid.New().String()
	}
	now := time.Now().UTC()
	profile.CreatedAt = now
	profile.UpdatedAt = now
	cliFlagsJSON, err := cliFlagsToJSON(profile.CLIFlags)
	if err != nil {
		return err
	}
	envVarsJSON, err := envVarsToJSON(profile.EnvVars)
	if err != nil {
		return err
	}
	enrich, err := enrichmentValues(profile)
	if err != nil {
		return err
	}
	_, err = r.db.ExecContext(ctx, r.db.Rebind(`
		INSERT INTO agent_profiles (
			id, agent_id, name, agent_display_name, model, mode, migrated_from,
			auto_approve, dangerously_skip_permissions, allow_indexing, cli_passthrough,
			user_modified, plan, cli_flags, env_vars, created_at, updated_at, deleted_at,
			workspace_id, role, icon, reports_to,
			skill_ids, desired_skills, custom_prompt,
			status, pause_reason, last_run_finished_at,
			max_concurrent_sessions, cooldown_sec, skip_idle_runs,
			consecutive_failures, failure_threshold,
			executor_preference, budget_monthly_cents, settings, permissions
		) VALUES (
			?, ?, ?, ?, ?, ?, ?,
			?, ?, ?, ?,
			?, '', ?, ?, ?, ?, ?,
			?, ?, ?, ?,
			?, ?, ?,
			?, ?, ?,
			?, ?, ?,
			?, ?,
			?, ?, ?, ?
		)
	`),
		profile.ID, profile.AgentID, profile.Name, profile.AgentDisplayName, profile.Model,
		nullableString(profile.Mode), nullableString(profile.MigratedFrom),
		dialect.BoolToInt(profile.AutoApprove),
		dialect.BoolToInt(profile.DangerouslySkipPermissions), dialect.BoolToInt(profile.AllowIndexing), dialect.BoolToInt(profile.CLIPassthrough),
		dialect.BoolToInt(profile.UserModified), cliFlagsJSON, envVarsJSON, profile.CreatedAt, profile.UpdatedAt, profile.DeletedAt,
		enrich.workspaceID, enrich.role, enrich.icon, enrich.reportsTo,
		enrich.skillIDs, enrich.desiredSkills, enrich.customPrompt,
		enrich.status, enrich.pauseReason, profile.LastRunFinishedAt,
		enrich.maxConcurrentSessions, profile.CooldownSec, dialect.BoolToInt(profile.SkipIdleRuns),
		profile.ConsecutiveFailures, enrich.failureThreshold,
		enrich.executorPreference, profile.BudgetMonthlyCents, enrich.settings, enrich.permissions,
	)
	return err
}

// defaultAgentProfileStatus is the canonical "idle" status default used when
// a profile is created or read without an explicit status. Hoisted to a
// constant so the goconst linter has a single shared source of truth.
const defaultAgentProfileStatus = "idle"

// profileEnrichmentValues holds the marshalled / defaulted office-enrichment
// values that the Insert + Update statements share. Centralising this keeps
// the SQL-bind ordering in one place and avoids duplicated default-fill logic.
type profileEnrichmentValues struct {
	workspaceID           string
	role                  string
	icon                  string
	reportsTo             string
	skillIDs              string
	desiredSkills         string
	customPrompt          string
	status                string
	pauseReason           string
	maxConcurrentSessions int
	failureThreshold      int
	executorPreference    string
	settings              string
	permissions           string
}

// enrichmentValues fills in defaults for the office-enrichment columns. The
// JSON-array fields (SkillIDs, DesiredSkills) are stored verbatim — empty
// values normalise to "[]" so the NOT NULL constraint is satisfied.
func enrichmentValues(profile *models.AgentProfile) (profileEnrichmentValues, error) {
	status := string(profile.Status)
	if status == "" {
		status = defaultAgentProfileStatus
	}
	maxSessions := profile.MaxConcurrentSessions
	if maxSessions <= 0 {
		maxSessions = 1
	}
	settings := profile.Settings
	if settings == "" {
		settings = "{}"
	}
	settings, err := settingsWithConfigOptions(settings, profile.ConfigOptions)
	if err != nil {
		return profileEnrichmentValues{}, err
	}
	permissions := profile.Permissions
	if permissions == "" {
		permissions = "{}"
	}
	return profileEnrichmentValues{
		workspaceID:           profile.WorkspaceID,
		role:                  string(profile.Role),
		icon:                  profile.Icon,
		reportsTo:             profile.ReportsTo,
		skillIDs:              normalizeJSONArray(profile.SkillIDs),
		desiredSkills:         normalizeJSONArray(profile.DesiredSkills),
		customPrompt:          profile.CustomPrompt,
		status:                status,
		pauseReason:           profile.PauseReason,
		maxConcurrentSessions: maxSessions,
		failureThreshold:      failureThresholdToColumn(profile.FailureThreshold),
		executorPreference:    profile.ExecutorPreference,
		settings:              settings,
		permissions:           permissions,
	}, nil
}

const profileSettingsConfigOptionsKey = "config_options"

func settingsWithConfigOptions(raw string, options map[string]string) (string, error) {
	raw = strings.TrimSpace(raw)
	if raw == "" {
		raw = "{}"
	}
	var settings map[string]json.RawMessage
	if err := json.Unmarshal([]byte(raw), &settings); err != nil {
		return "", fmt.Errorf("parse profile settings: %w", err)
	}
	if settings == nil {
		settings = map[string]json.RawMessage{}
	}
	clean := profileconfig.SanitizeConfigOptions(options)
	if len(clean) == 0 {
		delete(settings, profileSettingsConfigOptionsKey)
	} else {
		data, err := json.Marshal(clean)
		if err != nil {
			return "", fmt.Errorf("marshal profile config options: %w", err)
		}
		settings[profileSettingsConfigOptionsKey] = data
	}
	data, err := json.Marshal(settings)
	if err != nil {
		return "", fmt.Errorf("marshal profile settings: %w", err)
	}
	return string(data), nil
}

func configOptionsFromSettings(raw string) map[string]string {
	raw = strings.TrimSpace(raw)
	if raw == "" {
		return nil
	}
	var payload struct {
		ConfigOptions map[string]string `json:"config_options"`
	}
	if err := json.Unmarshal([]byte(raw), &payload); err != nil {
		return nil
	}
	return profileconfig.SanitizeConfigOptions(payload.ConfigOptions)
}

// normalizeJSONArray returns "[]" for empty values; otherwise the input. Used
// to satisfy the NOT NULL DEFAULT '[]' constraint on JSON-array TEXT columns
// (skill_ids, desired_skills) without mandating callers always set a value.
func normalizeJSONArray(s string) string {
	s = strings.TrimSpace(s)
	if s == "" {
		return "[]"
	}
	return s
}

// failureThresholdToColumn maps the *int (NULL = use workspace default) onto
// the merged column's INTEGER NOT NULL DEFAULT 3 semantics. We store 0 as
// "use workspace default" and round-trip it back to nil on read; non-zero
// values flow through verbatim.
func failureThresholdToColumn(p *int) int {
	if p == nil {
		return 0
	}
	return *p
}

// nullableString converts an empty string to sql.NullString zero-value so the
// column is written as NULL rather than "". Keeps nullable columns clean.
func nullableString(s string) sql.NullString {
	if s == "" {
		return sql.NullString{}
	}
	return sql.NullString{String: s, Valid: true}
}

// columnExists reports whether a column is present on a SQLite table. Used by
// the table-recreation migration to gracefully handle databases where ALTER
// TABLE ADD COLUMN ran but the recreation is running for the first time.
type sqlQueryer interface {
	Query(query string, args ...any) (*sql.Rows, error)
}

func columnExists(q sqlQueryer, table, column string) bool {
	rows, err := q.Query(`PRAGMA table_info(` + table + `)`)
	if err != nil {
		return false
	}
	defer func() { _ = rows.Close() }()
	for rows.Next() {
		var (
			cid     int
			name    string
			ctype   string
			notnull int
			dflt    sql.NullString
			pk      int
		)
		if err := rows.Scan(&cid, &name, &ctype, &notnull, &dflt, &pk); err != nil {
			return false
		}
		if name == column {
			return true
		}
	}
	return false
}

// cliFlagsToJSON marshals the profile's CLIFlags list into a JSON string
// suitable for the cli_flags TEXT column. Empty or nil slices serialise to
// "[]" so we can distinguish an empty-but-known list (skip backfill) from a
// never-written NULL (trigger backfill on read).
func cliFlagsToJSON(flags []models.CLIFlag) (string, error) {
	if flags == nil {
		flags = []models.CLIFlag{}
	}
	data, err := json.Marshal(flags)
	if err != nil {
		return "", fmt.Errorf("marshal cli_flags: %w", err)
	}
	return string(data), nil
}

func envVarsToJSON(envVars []models.ProfileEnvVar) (string, error) {
	if envVars == nil {
		envVars = []models.ProfileEnvVar{}
	}
	data, err := json.Marshal(envVars)
	if err != nil {
		return "", fmt.Errorf("marshal env_vars: %w", err)
	}
	return string(data), nil
}

func (r *sqliteRepository) UpdateAgentProfile(ctx context.Context, profile *models.AgentProfile) error {
	profile.UpdatedAt = time.Now().UTC()
	cliFlagsJSON, err := cliFlagsToJSON(profile.CLIFlags)
	if err != nil {
		return err
	}
	envVarsJSON, err := envVarsToJSON(profile.EnvVars)
	if err != nil {
		return err
	}
	enrich, err := enrichmentValues(profile)
	if err != nil {
		return err
	}
	result, err := r.db.ExecContext(ctx, r.db.Rebind(`
		UPDATE agent_profiles
		SET name = ?, agent_display_name = ?, model = ?, mode = ?, migrated_from = ?,
			auto_approve = ?, dangerously_skip_permissions = ?, allow_indexing = ?,
			cli_passthrough = ?, user_modified = ?, cli_flags = ?, env_vars = ?, updated_at = ?,
			workspace_id = ?, role = ?, icon = ?, reports_to = ?,
			skill_ids = ?, desired_skills = ?, custom_prompt = ?,
			status = ?, pause_reason = ?, last_run_finished_at = ?,
			max_concurrent_sessions = ?, cooldown_sec = ?, skip_idle_runs = ?,
			consecutive_failures = ?, failure_threshold = ?,
			executor_preference = ?,
			budget_monthly_cents = ?, settings = ?, permissions = ?
		WHERE id = ? AND deleted_at IS NULL
	`), profile.Name, profile.AgentDisplayName, profile.Model,
		nullableString(profile.Mode), nullableString(profile.MigratedFrom),
		dialect.BoolToInt(profile.AutoApprove),
		dialect.BoolToInt(profile.DangerouslySkipPermissions), dialect.BoolToInt(profile.AllowIndexing),
		dialect.BoolToInt(profile.CLIPassthrough), dialect.BoolToInt(profile.UserModified), cliFlagsJSON, envVarsJSON, profile.UpdatedAt,
		enrich.workspaceID, enrich.role, enrich.icon, enrich.reportsTo,
		enrich.skillIDs, enrich.desiredSkills, enrich.customPrompt,
		enrich.status, enrich.pauseReason, profile.LastRunFinishedAt,
		enrich.maxConcurrentSessions, profile.CooldownSec, dialect.BoolToInt(profile.SkipIdleRuns),
		profile.ConsecutiveFailures, enrich.failureThreshold,
		enrich.executorPreference,
		profile.BudgetMonthlyCents, enrich.settings, enrich.permissions,
		profile.ID)
	if err != nil {
		return err
	}
	rows, _ := result.RowsAffected()
	if rows == 0 {
		return fmt.Errorf("agent profile not found: %s", profile.ID)
	}
	return nil
}

func (r *sqliteRepository) DeleteAgentProfile(ctx context.Context, id string) error {
	now := time.Now().UTC()
	result, err := r.db.ExecContext(ctx, r.db.Rebind(`
		UPDATE agent_profiles SET deleted_at = ?, updated_at = ? WHERE id = ? AND deleted_at IS NULL
	`), now, now, id)
	if err != nil {
		return err
	}
	rows, _ := result.RowsAffected()
	if rows == 0 {
		return fmt.Errorf("agent profile not found: %s", id)
	}
	return nil
}

// agentProfileSelectColumns is the SELECT projection used by every
// AgentProfile read path. Extracted once so the next column added to
// agent_profiles only has to land here — duplicating the list across
// GetAgentProfile / GetAgentProfileIncludingDeleted / ListAgentProfiles
// risks the soft-delete path silently scanning zero values for a freshly
// added column, which is the same shape of bug this package fixes in
// another layer (orphaned watchers vs. stale projection drift).
const agentProfileSelectColumns = `
	SELECT id, agent_id, name, agent_display_name, model, mode, migrated_from,
		auto_approve, dangerously_skip_permissions, allow_indexing,
		cli_passthrough, user_modified, plan, cli_flags,
		COALESCE(env_vars, '[]'),
		created_at, updated_at, deleted_at,
		COALESCE(workspace_id, ''), COALESCE(role, ''), COALESCE(icon, ''),
		COALESCE(reports_to, ''), COALESCE(skill_ids, '[]'),
		COALESCE(desired_skills, '[]'), COALESCE(custom_prompt, ''),
		COALESCE(status, 'idle'), COALESCE(pause_reason, ''),
		last_run_finished_at,
		COALESCE(max_concurrent_sessions, 1), COALESCE(cooldown_sec, 0),
		COALESCE(skip_idle_runs, 0), COALESCE(consecutive_failures, 0),
		COALESCE(failure_threshold, 3), COALESCE(executor_preference, ''),
		COALESCE(budget_monthly_cents, 0),
		COALESCE(settings, '{}'), COALESCE(permissions, '{}')
	FROM agent_profiles`

func (r *sqliteRepository) GetAgentProfile(ctx context.Context, id string) (*models.AgentProfile, error) {
	row := r.ro.QueryRowContext(ctx,
		r.ro.Rebind(agentProfileSelectColumns+` WHERE id = ? AND deleted_at IS NULL`), id)
	profile, err := scanAgentProfile(row)
	if err != nil {
		return nil, err
	}
	return r.applyLegacyBackfill(ctx, profile), nil
}

// GetAgentProfileIncludingDeleted returns the row even when soft-deleted.
// Resolver and watcher self-heal callers use this to disambiguate
// "row removed" (recoverable: orphan reference) from "row never existed".
func (r *sqliteRepository) GetAgentProfileIncludingDeleted(ctx context.Context, id string) (*models.AgentProfile, error) {
	row := r.ro.QueryRowContext(ctx,
		r.ro.Rebind(agentProfileSelectColumns+` WHERE id = ?`), id)
	profile, err := scanAgentProfile(row)
	if err != nil {
		return nil, err
	}
	return r.applyLegacyBackfill(ctx, profile), nil
}

func (r *sqliteRepository) ListAgentProfiles(ctx context.Context, agentID string) ([]*models.AgentProfile, error) {
	rows, err := r.ro.QueryContext(ctx,
		r.ro.Rebind(agentProfileSelectColumns+` WHERE agent_id = ? AND deleted_at IS NULL ORDER BY created_at DESC`),
		agentID)
	if err != nil {
		return nil, err
	}
	defer func() {
		_ = rows.Close()
	}()

	var result []*models.AgentProfile
	for rows.Next() {
		profile, err := scanAgentProfile(rows)
		if err != nil {
			return nil, err
		}
		result = append(result, r.applyLegacyBackfill(ctx, profile))
	}
	return result, rows.Err()
}

// HasDeletedAgentProfiles reports whether the agent has any soft-deleted
// profile rows (deleted_at IS NOT NULL). It is the "has been provisioned
// before" signal the boot-time seeders consult before recreating a default
// profile, so a profile the user deleted is not silently resurrected.
func (r *sqliteRepository) HasDeletedAgentProfiles(ctx context.Context, agentID string) (bool, error) {
	var exists int
	err := r.ro.QueryRowContext(ctx,
		r.ro.Rebind(`SELECT 1 FROM agent_profiles WHERE agent_id = ? AND deleted_at IS NOT NULL LIMIT 1`),
		agentID).Scan(&exists)
	if errors.Is(err, sql.ErrNoRows) {
		return false, nil
	}
	if err != nil {
		return false, err
	}
	return true, nil
}

// applyLegacyBackfill returns the profile with CLIFlags populated from the
// legacy allow_indexing column for Auggie rows that predate the cli_flags
// column. The backfill is scoped to auggie only so a legacy Claude/Codex/
// Copilot row (possible via the column's DEFAULT 1) never gains an
// unsupported --allow-indexing flag. scanAgentProfile leaves CLIFlags nil
// when the stored JSON is absent; we resolve the agent name lazily via a
// small lookup here rather than JOINing in the main SELECT (keeps the
// read query unchanged and avoids cross-test flakiness).
func (r *sqliteRepository) applyLegacyBackfill(ctx context.Context, profile *models.AgentProfile) *models.AgentProfile {
	if profile == nil || profile.CLIFlags != nil {
		return profile
	}
	if !profile.AllowIndexing {
		profile.CLIFlags = []models.CLIFlag{}
		return profile
	}
	agent, err := r.GetAgent(ctx, profile.AgentID)
	if err != nil || agent == nil || agent.Name != "auggie" {
		profile.CLIFlags = []models.CLIFlag{}
		return profile
	}
	profile.CLIFlags = []models.CLIFlag{{
		Description: "Allow workspace indexing without confirmation",
		Flag:        "--allow-indexing",
		Enabled:     true,
	}}
	return profile
}

func (r *sqliteRepository) ListTUIAgents(ctx context.Context) ([]*models.Agent, error) {
	return r.listAgentsWhere(ctx, "tui_config IS NOT NULL")
}

func (r *sqliteRepository) listAgentsWhere(ctx context.Context, where string) ([]*models.Agent, error) {
	rows, err := r.ro.QueryContext(ctx,
		`SELECT id, name, workspace_id, supports_mcp, mcp_config_path, tui_config, created_at, updated_at
		FROM agents WHERE `+where+` ORDER BY created_at DESC`,
	)
	if err != nil {
		return nil, err
	}
	defer func() {
		_ = rows.Close()
	}()

	var result []*models.Agent
	for rows.Next() {
		agent, scanErr := scanAgent(rows)
		if scanErr != nil {
			return nil, scanErr
		}
		result = append(result, agent)
	}
	return result, rows.Err()
}

func scanAgent(scanner interface {
	Scan(dest ...any) error
}) (*models.Agent, error) {
	agent := &models.Agent{}
	var supportsMCP int
	var workspaceID sql.NullString
	var tuiConfigRaw sql.NullString
	if err := scanner.Scan(
		&agent.ID,
		&agent.Name,
		&workspaceID,
		&supportsMCP,
		&agent.MCPConfigPath,
		&tuiConfigRaw,
		&agent.CreatedAt,
		&agent.UpdatedAt,
	); err != nil {
		return nil, err
	}
	if workspaceID.Valid {
		agent.WorkspaceID = &workspaceID.String
	}
	agent.SupportsMCP = supportsMCP == 1
	if tuiConfigRaw.Valid {
		var cfg models.TUIConfigJSON
		if err := json.Unmarshal([]byte(tuiConfigRaw.String), &cfg); err != nil {
			return nil, fmt.Errorf("failed to parse tui_config: %w", err)
		}
		agent.TUIConfig = &cfg
	}
	return agent, nil
}

func scanAgentProfile(scanner interface {
	Scan(dest ...any) error
}) (*models.AgentProfile, error) {
	profile := &models.AgentProfile{}
	var mode sql.NullString
	var migratedFrom sql.NullString
	var autoApprove int
	var skipPermissions int
	var allowIndexing int
	var cliPassthrough int
	var userModified int
	var plan string // unused, kept for backwards compatibility
	var cliFlagsRaw sql.NullString
	var envVarsRaw sql.NullString
	var role, status string
	var skipIdleRuns int
	var failureThreshold int
	if err := scanner.Scan(
		&profile.ID,
		&profile.AgentID,
		&profile.Name,
		&profile.AgentDisplayName,
		&profile.Model,
		&mode,
		&migratedFrom,
		&autoApprove,
		&skipPermissions,
		&allowIndexing,
		&cliPassthrough,
		&userModified,
		&plan,
		&cliFlagsRaw,
		&envVarsRaw,
		&profile.CreatedAt,
		&profile.UpdatedAt,
		&profile.DeletedAt,
		&profile.WorkspaceID,
		&role,
		&profile.Icon,
		&profile.ReportsTo,
		&profile.SkillIDs,
		&profile.DesiredSkills,
		&profile.CustomPrompt,
		&status,
		&profile.PauseReason,
		&profile.LastRunFinishedAt,
		&profile.MaxConcurrentSessions,
		&profile.CooldownSec,
		&skipIdleRuns,
		&profile.ConsecutiveFailures,
		&failureThreshold,
		&profile.ExecutorPreference,
		&profile.BudgetMonthlyCents,
		&profile.Settings,
		&profile.Permissions,
	); err != nil {
		return nil, err
	}
	if mode.Valid {
		profile.Mode = mode.String
	}
	if migratedFrom.Valid {
		profile.MigratedFrom = migratedFrom.String
	}
	profile.AutoApprove = autoApprove == 1
	profile.DangerouslySkipPermissions = skipPermissions == 1
	profile.AllowIndexing = allowIndexing == 1
	profile.CLIPassthrough = cliPassthrough == 1
	profile.UserModified = userModified == 1
	profile.SkipIdleRuns = skipIdleRuns == 1
	profile.Role = models.AgentRole(role)
	profile.Status = models.AgentStatus(status)
	profile.ConfigOptions = configOptionsFromSettings(profile.Settings)
	if failureThreshold > 0 {
		ft := failureThreshold
		profile.FailureThreshold = &ft
	}
	if cliFlagsRaw.Valid && cliFlagsRaw.String != "" {
		if err := json.Unmarshal([]byte(cliFlagsRaw.String), &profile.CLIFlags); err != nil {
			return nil, fmt.Errorf("failed to parse cli_flags for profile %s: %w", profile.ID, err)
		}
	}
	if envVarsRaw.Valid && envVarsRaw.String != "" {
		if err := json.Unmarshal([]byte(envVarsRaw.String), &profile.EnvVars); err != nil {
			return nil, fmt.Errorf("failed to parse env_vars for profile %s: %w", profile.ID, err)
		}
	}
	// When cli_flags is NULL the caller (GetAgentProfile / ListAgentProfiles)
	// runs applyLegacyBackfill to seed the list scoped to the owning agent.
	// Leaving CLIFlags as nil here is deliberate: non-nil vs nil discriminates
	// "stored empty list" from "never written". applyLegacyBackfill rewrites
	// nil → []CLIFlag{} so downstream code never sees a nil slice.
	return profile, nil
}