#!/usr/bin/env python3
"""
AI-Check 主入口 — Controller 层接口参数变更检测（纯 Python，无 Java 依赖）
"""

import argparse
import sys
from pathlib import Path
from typing import Optional

import yaml

CHECKER_DIR = Path(__file__).resolve().parent
sys.path.insert(0, str(CHECKER_DIR))

from change_logger import persist_change_log
from comparator import compare_endpoints
from controller_parser import (
    endpoints_to_map,
    filter_endpoints_by_files,
    parse_endpoints_from_files,
)
from git_utils import (
    get_changed_java_controller_files,
    get_controller_files_diff,
    get_current_commit,
    get_file_content_at_commit,
    get_previous_commit_sha,
)
from llm_reviewer import review_parameter_changes
from notifier import send_parameter_change_notification


def load_config(config_path: Path) -> dict:
    """加载 YAML 配置文件。"""
    if not config_path.exists():
        print(f"[错误] 配置文件不存在: {config_path}")
        print("请在 .gitea/config.yaml 中填写配置并提交到仓库。")
        sys.exit(1)

    with open(config_path, "r", encoding="utf-8") as f:
        return yaml.safe_load(f) or {}


def _read_file_safe(path: Path) -> str:
    """读取文件内容。"""
    try:
        return path.read_text(encoding="utf-8", errors="ignore")
    except OSError as exc:
        print(f"[警告] 无法读取 {path}: {exc}")
        return ""


def _load_version_contents(
    repo_root: Path,
    file_paths: list,
    commit_sha: Optional[str] = None,
) -> dict:
    """加载文件内容；commit_sha 为空则读工作区，否则 git show。"""
    contents = {}
    for fp in file_paths:
        norm = fp.replace("\\", "/")
        if commit_sha:
            text = get_file_content_at_commit(commit_sha, norm)
            if text is not None:
                contents[norm] = text
        else:
            text = _read_file_safe(repo_root / norm)
            if text:
                contents[norm] = text
    return contents


def parse_changed_endpoints(
    repo_root: Path,
    source_subdir: str,
    changed_files: list,
    old_sha: str,
    label: str,
) -> dict:
    """解析变更 Controller 文件在新/旧版本的端点。"""
    if label == "new":
        contents = _load_version_contents(repo_root, changed_files)
    else:
        contents = _load_version_contents(repo_root, changed_files, commit_sha=old_sha)

    print(f"[AST] 解析 {label} 版本 {len(contents)} 个 Controller 文件")
    endpoints = parse_endpoints_from_files(
        repo_root, source_subdir, changed_files, contents
    )
    print(f"[AST] {label} 版本共 {len(endpoints)} 个接口")
    return endpoints_to_map(endpoints)


def main() -> int:
    """主流程入口。"""
    parser = argparse.ArgumentParser(
        description="AI-Check: Controller 接口参数变更检测"
    )
    parser.add_argument(
        "--config", default=".gitea/config.yaml", help="配置文件路径"
    )
    parser.add_argument("--repo-root", default=".", help="Git 仓库根目录")
    parser.add_argument("push_user", nargs="?", default=None, help="推送人")
    parser.add_argument("push_time", nargs="?", default=None, help="推送时间")
    args = parser.parse_args()

    repo_root = Path(args.repo_root).resolve()
    config_path = Path(args.config)
    if not config_path.is_absolute():
        config_path = repo_root / config_path
    config = load_config(config_path)

    source_subdir = config.get("source_dir", "src/main/java")

    commit_info = get_current_commit()
    push_user = args.push_user or commit_info.author
    push_time = args.push_time or commit_info.commit_time

    print("Controller 接口参数变更检测（纯 Python）")
    print("=" * 40)
    print(f"推送人: {push_user}")
    print(f"推送时间: {push_time}")
    print(f"LLM 审核: {config.get('llm', {}).get('enabled', True)}")
    print(f"记录日志: {config.get('log', {}).get('enabled', False)}")
    print("=" * 40)

    prev_sha = get_previous_commit_sha()
    if prev_sha is None:
        print("[Git] 首次提交，无可对比版本，跳过。")
        return 0

    changed_files = [f.replace("\\", "/") for f in get_changed_java_controller_files(prev_sha, commit_info.sha)]
    if not changed_files:
        print("[Git] 本次提交未变更 Controller 文件，跳过。")
        return 0

    print(f"[Git] 变更 Controller 文件 {len(changed_files)} 个:")
    for f in changed_files:
        print(f"  - {f}")

    git_diff = get_controller_files_diff(prev_sha, commit_info.sha, changed_files)

    new_map = parse_changed_endpoints(
        repo_root, source_subdir, changed_files, prev_sha, "new"
    )
    old_map = parse_changed_endpoints(
        repo_root, source_subdir, changed_files, prev_sha, "old"
    )

    new_filtered = endpoints_to_map(
        filter_endpoints_by_files(list(new_map.values()), changed_files)
    )
    old_filtered = endpoints_to_map(
        filter_endpoints_by_files(list(old_map.values()), changed_files)
    )

    reports = compare_endpoints(old_filtered, new_filtered)
    print(f"[对比] 检测到 {len(reports)} 个接口存在参数变更")

    llm_review = None
    if reports:
        llm_review = review_parameter_changes(
            reports, config, changed_files, git_diff
        )
        if llm_review:
            print("[LLM] 参数变更审核完成")

    persist_change_log(reports, commit_info, config, llm_review)

    notify_cfg = config.get("notify", {})
    if notify_cfg.get("only_on_change", True) and not reports:
        print("[通知] 无接口参数变更，跳过企微通知。")
        return 0

    mentioned = notify_cfg.get("mentioned_users", "")
    mentioned_list = [u.strip() for u in mentioned.split(",") if u.strip()] or None

    send_parameter_change_notification(
        webhook_url=config.get("wecom", {}).get("webhook_url", ""),
        reports=reports,
        push_user=push_user,
        push_time=push_time,
        llm_review=llm_review,
        mentioned_users=mentioned_list,
    )

    print("\n完成")
    return 0


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