#!/usr/bin/env python3
"""列出仓库内所有可部署服务及其目标节点。"""

from __future__ import annotations

import os
import sys
from collections import defaultdict

from lib import discover_services, project_root


def main() -> int:
    root = project_root()
    os.chdir(root)
    services = discover_services()
    if not services:
        print("未找到任何可部署服务（需 compose.yaml 且能解析 node）")
        return 0

    by_node: dict[str, list[str]] = defaultdict(list)
    for info in services:
        rel = os.path.relpath(info["service_dir"], root)
        by_node[info["node"]].append(rel)

    print(f"共 {len(services)} 个服务，分布在 {len(by_node)} 个节点:\n")
    for node in sorted(by_node):
        print(f"[{node}]")
        for service in by_node[node]:
            print(f"  - {service}")
        print()
    return 0


if __name__ == "__main__":
    sys.exit(main())