#!/usr/bin/env python3
"""把 extraction-viewer.html + data/search_result + data/extract_result + images
打包成可离线分享的静态版本。

输出:
  data/dist/extraction-viewer.html  - 单文件，所有 JSON 内联，marked.js 内联
  data/dist/images/                 - 图片直接拷贝（不 base64，避免 HTML 巨大）
  data/dist.zip                     - 上面两项一起的压缩包

用法:
  python3 build_static.py            # 生成 dist/ + dist.zip
  python3 build_static.py --no-zip   # 只生成 dist/
"""
from __future__ import annotations

import argparse
import json
import shutil
import sys
import urllib.request
import zipfile
from pathlib import Path

ROOT = Path(__file__).resolve().parent
PROJECT_ROOT = ROOT.parents[1]
DATA_DIR = PROJECT_ROOT / "data"
SEARCH_RESULT_DIR = DATA_DIR / "search_result"
EXTRACT_RESULT_DIR = DATA_DIR / "extract_result"
VIEWER = ROOT / "extraction-viewer.html"
RESULT = SEARCH_RESULT_DIR / "result.json"
EXTRACTED_CAP = EXTRACT_RESULT_DIR / "capability"
EXTRACTED_STRAT = EXTRACT_RESULT_DIR / "strategy"
BATCH = DATA_DIR / "batch_extracted"
IMAGES = SEARCH_RESULT_DIR / "images"
FIELD_SPECS = ROOT / "capability_strategy_fields.csv"

DIST = DATA_DIR / "dist"
DIST_ZIP = DATA_DIR / "dist.zip"

MARKED_URL = "https://cdn.jsdelivr.net/npm/marked/marked.min.js"
MARKED_LOCAL = ROOT / ".marked.min.js"  # cache locally so reruns are offline


def load_json_dir(p: Path) -> dict[str, object]:
    if not p.is_dir():
        return {}
    out: dict[str, object] = {}
    for f in sorted(p.glob("*.json")):
        with f.open(encoding="utf-8") as fh:
            out[f.name] = json.load(fh)
    return out


def fetch_marked() -> str:
    if MARKED_LOCAL.exists():
        return MARKED_LOCAL.read_text(encoding="utf-8")
    print(f"  下载 marked.js: {MARKED_URL}")
    with urllib.request.urlopen(MARKED_URL, timeout=20) as r:
        text = r.read().decode("utf-8")
    MARKED_LOCAL.write_text(text, encoding="utf-8")
    return text


def build_html(viewer_html: str, bundle: dict, marked_js: str) -> str:
    # JSON 安全嵌入: 把 </ 转义掉, 防止 </script> 提早闭合
    bundle_json = (
        json.dumps(bundle, ensure_ascii=False, separators=(",", ":"))
        .replace("</", "<\\/")
    )
    inject = (
        "<script>window.__BUNDLED__ = "
        + bundle_json
        + ";</script>\n"
        + "<script>"
        + marked_js
        + "</script>\n"
    )
    # 把 CDN 那行换成内联的 marked + 数据
    cdn_tag = '<script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>'
    if cdn_tag not in viewer_html:
        print("WARN: 没找到 CDN marked 脚本标签, 直接在 </head> 前注入", file=sys.stderr)
        return viewer_html.replace("</head>", inject + "</head>")
    return viewer_html.replace(cdn_tag, inject)


def main() -> int:
    ap = argparse.ArgumentParser()
    ap.add_argument("--no-zip", action="store_true", help="只输出 dist/, 不打 zip")
    ap.add_argument(
        "--no-images",
        action="store_true",
        help="不复制 images/（仅适合所有图片都来自外部 URL 的场景）",
    )
    args = ap.parse_args()

    if not VIEWER.exists():
        print(f"找不到 {VIEWER}", file=sys.stderr)
        return 1

    print("[1/5] 读取 viewer + JSON")
    viewer_html = VIEWER.read_text(encoding="utf-8")
    result = json.loads(RESULT.read_text(encoding="utf-8")) if RESULT.exists() else []
    capability = load_json_dir(EXTRACTED_CAP)
    strategy = load_json_dir(EXTRACTED_STRAT)
    batch = load_json_dir(BATCH)
    print(
        f"  result.json: {len(result)} 条; "
        f"extracted/capability: {len(capability)}; "
        f"extracted/strategy: {len(strategy)}; "
        f"batch_extracted: {len(batch)}"
    )

    print("[2/5] 抓取 marked.js")
    marked_js = fetch_marked()

    print("[3/5] 内联生成 HTML")
    field_specs_csv = FIELD_SPECS.read_text(encoding="utf-8") if FIELD_SPECS.exists() else ""
    if field_specs_csv:
        print(f"  capability_strategy_fields.csv: {len(field_specs_csv)} bytes")
    # 注: 数据 key 必须等于 viewer SOURCES[*].dir 的相对路径
    bundle = {
        "result": result,
        "extracted/capability": capability,
        "extracted/strategy": strategy,
        "batch_extracted": batch,
        "field_specs_csv": field_specs_csv,
    }
    new_html = build_html(viewer_html, bundle, marked_js)

    if DIST.exists():
        shutil.rmtree(DIST)
    DIST.mkdir()
    out_html = DIST / "extraction-viewer.html"
    out_html.write_text(new_html, encoding="utf-8")
    size_mb = out_html.stat().st_size / 1024 / 1024
    print(f"  写入 {out_html.relative_to(PROJECT_ROOT)} ({size_mb:.2f} MB)")

    print("[4/5] 复制 images/")
    if args.no_images:
        print("  跳过（--no-images）")
    elif IMAGES.is_dir():
        shutil.copytree(IMAGES, DIST / "images")
        n = len(list((DIST / "images").iterdir()))
        size_mb = sum(p.stat().st_size for p in (DIST / "images").iterdir()) / 1024 / 1024
        print(f"  复制 {n} 张图片, {size_mb:.1f} MB")
    else:
        print("  没有 images/, 跳过")

    if args.no_zip:
        print("[5/5] 跳过 zip（--no-zip）")
    else:
        print(f"[5/5] 打包 {DIST_ZIP.name}")
        if DIST_ZIP.exists():
            DIST_ZIP.unlink()
        with zipfile.ZipFile(DIST_ZIP, "w", zipfile.ZIP_DEFLATED, compresslevel=6) as zf:
            for p in DIST.rglob("*"):
                if p.is_file():
                    zf.write(p, p.relative_to(DIST.parent))
        zip_mb = DIST_ZIP.stat().st_size / 1024 / 1024
        print(f"  {DIST_ZIP.relative_to(PROJECT_ROOT)} ({zip_mb:.1f} MB)")

    print(
        "\n完成。同事拿到 dist.zip 后:\n"
        "  1. 解压\n"
        "  2. 双击 dist/extraction-viewer.html\n"
        "  3. 直接看（不需要起 server，不需要联网）"
    )
    return 0


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