"""CLI entry point ``rmgr``."""

from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path


def main(argv: list[str] | None = None) -> int:
    parser = argparse.ArgumentParser(
        prog="rmgr",
        description="Repo Manager CLI (helixforge.repo-manager)",
    )
    parser.add_argument("--version", action="store_true", help="Print package version")
    sub = parser.add_subparsers(dest="command")

    sub.add_parser("version", help="Print version")

    p_obs = sub.add_parser("observe", help="Observe repository + print snapshot JSON")
    p_obs.add_argument("--path", default=".", help="Repository checkout path")
    p_obs.add_argument("--slug", default=None, help="Override repo slug")

    p_rec = sub.add_parser("reconcile", help="Rebuild local work-record index from files")
    p_rec.add_argument("--path", default=".", help="Repository checkout path")
    p_rec.add_argument("--slug", default=None)
    p_rec.add_argument(
        "--write-index",
        action="store_true",
        default=True,
        help="Write .repo-manager/index.json (default true)",
    )
    p_rec.add_argument("--no-write-index", action="store_true", help="Do not write index file")

    p_cmd = sub.add_parser(
        "update-task-status",
        help="Command repo.work.update_task_status (file + git commit)",
    )
    p_cmd.add_argument("--path", default=".", help="Repository checkout path")
    p_cmd.add_argument("--task-id", required=True, help="Canonical task id e.g. RMGR-WP-0001-T05")
    p_cmd.add_argument(
        "--status",
        required=True,
        choices=["wait", "todo", "progress", "done", "cancel"],
    )
    p_cmd.add_argument("--reason", default="rmgr CLI")
    p_cmd.add_argument("--correlation-id", default=None)
    p_cmd.add_argument(
        "--no-commit",
        action="store_true",
        help="Patch file only (invalid as full applied evidence; for tests)",
    )

    args = parser.parse_args(argv)

    if args.version or args.command in (None, "version"):
        from repo_manager import __version__

        print(__version__)
        return 0 if args.command or args.version else 0

    if args.command == "observe":
        from repo_manager.observe import observe_repository

        snap, _idx = observe_repository(Path(args.path), slug=args.slug)
        print(json.dumps(snap, indent=2))
        return 0

    if args.command == "reconcile":
        from repo_manager.index_store import append_event, save_index
        from repo_manager.observe import observe_repository

        root = Path(args.path)
        snap, index = observe_repository(root, slug=args.slug)
        append_event(
            index,
            {
                "type": "repo.reconciled",
                "workplan_count": snap["index"]["workplan_count"],
                "task_count": snap["index"]["task_count"],
            },
        )
        if not args.no_write_index:
            path = save_index(index)
            print(json.dumps({"ok": True, "index_path": str(path), "snapshot": snap}, indent=2))
        else:
            print(json.dumps({"ok": True, "snapshot": snap, "index": index.to_dict()}, indent=2))
        return 0

    if args.command == "update-task-status":
        from repo_manager.commands.task_status import update_task_status

        result = update_task_status(
            Path(args.path),
            args.task_id,
            args.status,
            correlation_id=args.correlation_id,
            reason=args.reason,
            commit=not args.no_commit,
        )
        print(json.dumps(result.to_dict(), indent=2))
        return 0 if result.status == "applied" else 1

    parser.print_help()
    return 0


if __name__ == "__main__":
    raise SystemExit(main())