"""~/.skills 仓库内的 git 操作。"""

from __future__ import annotations

import subprocess
import sys
from pathlib import Path

from skiff.paths import SKILLS_HOME


def _run_git(repo: Path, *args: str, check: bool = True) -> subprocess.CompletedProcess[str]:
    return subprocess.run(
        ["git", "-C", str(repo), *args],
        check=check,
        text=True,
        capture_output=not sys.stdout.isatty(),
    )


def ensure_git_repo(repo: Path) -> None:
    if not (repo / ".git").exists():
        raise SystemExit(f"不是 git 仓库: {repo}")


def has_staged_changes(repo: Path) -> bool:
    result = _run_git(repo, "diff", "--cached", "--quiet", check=False)
    return result.returncode == 1


def publish(
    *,
    paths: list[str],
    message: str | None,
    push: bool,
    no_commit: bool,
) -> None:
    repo = SKILLS_HOME.resolve()
    ensure_git_repo(repo)

    _run_git(repo, "add", "--", *paths)

    if not has_staged_changes(repo):
        print("没有可提交的变更", file=sys.stdout)
        return

    if no_commit:
        print(f"已暂存变更: {', '.join(paths)}", file=sys.stdout)
        return

    if not message:
        raise SystemExit("提交需要 -m/--message")

    _run_git(repo, "commit", "-m", message)
    print(f"已提交: {message}", file=sys.stdout)

    if push:
        _run_git(repo, "push")
        print("已推送到远程", file=sys.stdout)