#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
在已导出的 Wolai 帮助中心语料中做关键词命中统计，方便定位“页面组成/页面操作”相关页面。

示例：
  python scripts/wolai_help_center/build_keyword_hits.py --out artifacts/wolai-help-center-v4
"""

from __future__ import annotations

import argparse
import json
from pathlib import Path
from typing import Any, Dict, List


DEFAULT_KEYWORDS = [
    "页面",
    "页面选项",
    "自适应宽度",
    "小字体",
    "标题目录",
    "标题自动编号",
    "编辑保护",
    "复制链接",
    "导出",
    "移动",
    "嵌入",
    "页面历史",
    "字数",
    "统计",
    "权限",
    "共享",
    "公开",
    "私有",
    "删除",
    "恢复",
    "撤回",
    "回收站",
    "关系图",
    "反向链接",
]


def read_front_matter_title(md: str) -> str:
    if not md.startswith("---"):
        return ""
    try:
        meta_json = md.split("---", 2)[1].strip()
        meta = json.loads(meta_json)
        return str(meta.get("title") or "")
    except Exception:
        return ""


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--out", type=str, default="artifacts/wolai-help-center-v4", help="抓取输出目录")
    parser.add_argument("--keywords", type=str, default="", help="自定义关键词（用逗号分隔）")
    args = parser.parse_args()

    out_dir = Path(args.out)
    index_path = out_dir / "index.json"
    if not index_path.exists():
        raise SystemExit(f"未找到 {index_path}")

    index = json.loads(index_path.read_text(encoding="utf-8"))
    results: List[Dict[str, Any]] = index.get("results") or []
    keywords = (
        [x.strip() for x in args.keywords.split(",") if x.strip()]
        if args.keywords.strip()
        else DEFAULT_KEYWORDS
    )

    hits: Dict[str, List[Dict[str, str]]] = {k: [] for k in keywords}
    for r in results:
        pid = str(r.get("pageId") or "")
        md_rel = str(r.get("md") or "")
        if not pid or not md_rel:
            continue
        md_path = out_dir / md_rel
        if not md_path.exists():
            continue
        md = md_path.read_text(encoding="utf-8", errors="replace")
        title = read_front_matter_title(md)
        for k in keywords:
            if k in md:
                hits[k].append(
                    {"pageId": pid, "title": title, "md": md_rel.replace("\\", "/")}
                )

    analysis_dir = out_dir / "analysis"
    analysis_dir.mkdir(parents=True, exist_ok=True)
    out_path = analysis_dir / "keyword_hits.json"
    out_path.write_text(json.dumps(hits, ensure_ascii=False, indent=2), encoding="utf-8")
    print(f"已写入：{out_path}")
    return 0


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