package orch

import (
	"fmt"

	"ai-workflow-skill/packages/coord-core/protocol"
	"ai-workflow-skill/packages/coord-core/store"

	"github.com/spf13/cobra"
)

type dispatchOptions struct {
	runID         string
	taskID        string
	toAgent       string
	body          string
	bodyFile      string
	executionMode string
	baseRef       string
	repoPath      string
	workspaceRoot string
}

func newDispatchCmd(root *rootOptions) *cobra.Command {
	opts := &dispatchOptions{}

	cmd := &cobra.Command{
		Use:   "dispatch",
		Short: "Dispatch a ready task to a worker through inbox",
		Long: helpLong(
			"Use dispatch to turn one ready task into a concrete attempt and inbox thread.",
			"You must choose exactly one execution mode.",
			"analysis: create the attempt and thread only; do not allocate a worktree.",
			"code: allocate a Git worktree for the attempt and record workspace metadata.",
			"repo-path, workspace-root, and base-ref only apply to execution-mode code.",
			"dispatch creates handoff state only; a separate worker runtime or worker agent must still claim the assigned inbox thread.",
		),
		Example: `  orch --db .agents/coord.db dispatch --run blog_mvp_001 --task T1 --execution-mode analysis --to qa-worker --body "Summarize the latest failures."
  orch --db .agents/coord.db dispatch --run blog_mvp_001 --task T2 --execution-mode code --to backend-worker --repo-path /path/to/repo --workspace-root .orch/worktrees --base-ref main --body-file ./tasks/t2.md`,
		RunE: func(cmd *cobra.Command, args []string) error {
			normalizedOpts, err := normalizeDispatchOptions(*opts)
			if err != nil {
				return err
			}

			body, err := resolveBodyValue(opts.body, opts.bodyFile)
			if err != nil {
				return err
			}

			ctx := cmd.Context()
			sqlDB, err := openOrchDB(ctx, root.dbPath)
			if err != nil {
				return err
			}
			defer sqlDB.Close()

			result, err := store.NewOrchStore(sqlDB).DispatchTask(ctx, store.DispatchInput{
				RunID:            normalizedOpts.runID,
				TaskID:           normalizedOpts.taskID,
				ToAgent:          normalizedOpts.toAgent,
				Body:             body,
				BaseRef:          normalizedOpts.baseRef,
				PrepareWorkspace: newDispatchWorkspacePreparer(cmd, normalizedOpts),
			})
			if err != nil {
				return err
			}

			resp := protocol.Success{
				OK:      true,
				Command: "dispatch",
				Data: map[string]any{
					"task":    result.Task,
					"attempt": result.Attempt,
					"thread":  result.Thread,
					"message": result.Message,
				},
			}
			if root.json {
				return protocol.WriteJSON(cmd.OutOrStdout(), resp)
			}

			_, err = fmt.Fprintf(
				cmd.OutOrStdout(),
				"dispatched task %s to %s as thread %s\n",
				result.Task.TaskID,
				result.Attempt.AssignedTo,
				result.Attempt.ThreadID,
			)
			return err
		},
	}

	cmd.Flags().StringVar(&opts.runID, "run", "", "Run ID")
	cmd.Flags().StringVar(&opts.taskID, "task", "", "Task ID")
	cmd.Flags().StringVar(&opts.toAgent, "to", "", "Worker agent override")
	cmd.Flags().StringVar(&opts.body, "body", "", "Task message body")
	cmd.Flags().StringVar(&opts.bodyFile, "body-file", "", "Read task message body from file")
	cmd.Flags().StringVar(&opts.executionMode, "execution-mode", "", "Execution mode: analysis or code")
	cmd.Flags().StringVar(&opts.baseRef, "base-ref", "", "Optional base ref to record on the attempt")
	cmd.Flags().StringVar(&opts.repoPath, "repo-path", "", "Source repository path for worktree dispatch")
	cmd.Flags().StringVar(&opts.workspaceRoot, "workspace-root", "", "Workspace root for worktree dispatch")
	_ = cmd.MarkFlagRequired("run")
	_ = cmd.MarkFlagRequired("task")
	_ = cmd.MarkFlagRequired("execution-mode")

	return cmd
}