"""把成品章节与年表推送到自建 Gitea。

- 推送凭据复用现有 ~/.ssh/id_ed25519（已验证在 Gitea 注册为 gitadmin 的 chendy-ubuntu-wsl）。
- 原始 legends 数据与存档不入库（见 .gitignore）。
- 自动直推，不设人工审核环节（按访谈决策）。
"""
from __future__ import annotations

import subprocess
from pathlib import Path

from dfannals.config import GITEA_REMOTE, PROJECT_DIR, SSH_KEY

GITIGNORE = """\
# 原始数据与存档：不入库
data/
vendor/
__pycache__/
*.pyc
*.log
"""


def _git(*args: str, check: bool = True) -> subprocess.CompletedProcess:
    env = {
        "GIT_SSH_COMMAND": f"ssh -i {SSH_KEY} -o IdentitiesOnly=yes -o StrictHostKeyChecking=accept-new",
        "GIT_TERMINAL_PROMPT": "0",
    }
    proc = subprocess.run(
        ["git", *args],
        cwd=PROJECT_DIR,
        env={**_base_env(), **env},
        capture_output=True,
        text=True,
        check=False,  # 下面是自定义错误处理，故意不用 check=True
    )
    if check and proc.returncode != 0:
        raise RuntimeError(f"git {' '.join(args)} 失败：{proc.stderr.strip() or proc.stdout.strip()}")
    return proc


def _base_env() -> dict:
    import os

    env = dict(os.environ)
    env.pop("GIT_DIR", None)
    return env


def ensure_repo() -> None:
    """初始化仓库、写 .gitignore、设置 remote 与提交身份。"""
    if not (PROJECT_DIR / ".git").is_dir():
        _git("init", "-b", "main")
    (PROJECT_DIR / ".gitignore").write_text(GITIGNORE)

    remotes = _git("remote").stdout.split()
    if "origin" in remotes:
        _git("remote", "set-url", "origin", GITEA_REMOTE)
    else:
        _git("remote", "add", "origin", GITEA_REMOTE)

    if not _git("config", "user.name", check=False).stdout.strip():
        _git("config", "user.name", "DF Annals Bot")
    if not _git("config", "user.email", check=False).stdout.strip():
        _git("config", "user.email", "df-annals@hajim1.art")


def _tracked_empty_sources() -> list[str]:
    """已跟踪的源码/文档里，哪些是 0 字节。"""
    suffixes = (".py", ".sh", ".lua", ".md", ".toml", ".json")
    out: list[str] = []
    for rel in _git("ls-files").stdout.split():
        if not rel.endswith(suffixes):
            continue
        path = PROJECT_DIR / rel
        if path.is_file() and path.stat().st_size == 0:
            out.append(rel)
    return out


def commit_and_push(message: str, paths: list[Path] | None = None) -> str:
    """提交并推送。返回提交哈希；无改动时返回空串。

    提交前硬拦空文件：实测发生过一次 cli.py 被提交为 0 字节的事故——
    而 cli.py 是唯一入口，于是远端仓库里的管道完全不可运行，且失败是静默的。
    这种错误不能靠人复核，必须在提交口拦住。
    """
    empty = _tracked_empty_sources()
    if empty:
        raise RuntimeError("拒绝提交：以下已跟踪文件是空的 → " + "、".join(empty))

    if paths:
        for p in paths:
            _git("add", "--", str(p.relative_to(PROJECT_DIR)) if p.is_absolute() else str(p))
    else:
        _git("add", "-A")
    if not _git("status", "--porcelain").stdout.strip():
        return ""
    _git("commit", "-m", message)
    head = _git("rev-parse", "--short", "HEAD").stdout.strip()
    _git("push", "-u", "origin", "HEAD:main")
    return head