package sqlite

import (
	"errors"

	"github.com/kandev/kandev/internal/task/repository/repoerrors"
)

// ErrTaskNotFound is returned by Repository methods (GetTask, UpdateTask,
// DeleteTask, UpdateTaskState, …) when no row matches the supplied id.
// Callers should classify via errors.Is rather than substring-matching the
// formatted message, which includes the task id and is therefore brittle.
var ErrTaskNotFound = repoerrors.ErrTaskNotFound

// ErrWorkspaceNotFound is returned by Repository workspace methods when no row
// matches the supplied id.
var ErrWorkspaceNotFound = repoerrors.ErrWorkspaceNotFound

// ErrTaskPlanNotFound is returned by Repository task-plan methods when no row
// matches the supplied task id.
var ErrTaskPlanNotFound = repoerrors.ErrTaskPlanNotFound

// ErrTaskEnvironmentNotFound is returned when no task environment row matches
// the supplied id. Callers should classify it with errors.Is.
var ErrTaskEnvironmentNotFound = repoerrors.ErrTaskEnvironmentNotFound

// ErrNoPrimarySession is returned by GetPrimarySessionByTaskID when the task
// has no primary session row. Callers should use errors.Is to distinguish this
// "not found" case from genuine backend/DB errors.
var ErrNoPrimarySession = errors.New("no primary session")

// ErrExternalIDConflict is returned by CreateTask (and its
// admission/capacity variants) when the insert violates
// uniq_tasks_external_id — the TOCTOU backstop for the create sequence's
// step-3 lookup. Callers should re-read by (workspace_id, external_id) and
// return the winner rather than treating this as a hard failure.
var ErrExternalIDConflict = repoerrors.ErrExternalIDConflict

// ErrOfficeSessionRaceConflict is returned by CreateTaskSession when the
// insert violates the uniq_office_task_session partial unique index — i.e.
// two callers raced past their SELECT-then-INSERT for the same
// (task_id, agent_profile_id) pair. Callers should re-read and reuse the
// winning row rather than treating this as a hard failure.
var ErrOfficeSessionRaceConflict = errors.New("office task session race conflict")