"""
从 Kiro Agent 缓存中恢复 docs/h5_ui/ 文件到 2026-03-04 09:00 (北京时间) 之前的最新版本。

扫描缓存目录中所有 hash 子目录，找到每个 h5_ui 文件的最新缓存版本，
与当前工作区版本对比，仅恢复有差异的文件。
"""
import os
import shutil
import hashlib
from pathlib import Path
from datetime import datetime, timezone, timedelta

# 北京时间 = UTC+8
BJT = timezone(timedelta(hours=8))
CUTOFF = datetime(2026, 3, 4, 9, 0, 0, tzinfo=BJT)

CACHE_ROOT = Path(
    r"C:\Users\Administrator\AppData\Roaming\Kiro\User\globalStorage"
    r"\kiro.kiroagent\f2aaff8dac256b544f00059b8ef5d1e2"
    r"\74a08cf8613c7dec4db7b264470db812"
)
WORKSPACE = Path(r"C:\NeoZQYY")
TARGET_PREFIX = Path("docs") / "h5_ui"


def md5(path: Path) -> str:
    h = hashlib.md5()
    h.update(path.read_bytes())
    return h.hexdigest()


def scan_cache():
    """扫描缓存，返回 {relative_path: [(mtime_utc, full_path), ...]}"""
    results: dict[str, list[tuple[datetime, Path]]] = {}
    if not CACHE_ROOT.exists():
        print(f"[ERROR] 缓存根目录不存在: {CACHE_ROOT}")
        return results

    for hash_dir in CACHE_ROOT.iterdir():
        if not hash_dir.is_dir():
            continue
        h5_base = hash_dir / "docs" / "h5_ui"
        if not h5_base.exists():
            continue
        for f in h5_base.rglob("*"):
            if not f.is_file():
                continue
            rel = f.relative_to(hash_dir)  # e.g. docs/h5_ui/pages/xxx.html
            mtime = datetime.fromtimestamp(f.stat().st_mtime, tz=BJT)
            results.setdefault(str(rel), []).append((mtime, f))
    return results


def find_best_versions(cache_map):
    """对每个文件，找 cutoff 之前最新的版本；若全部早于 cutoff 则取最新的那个"""
    best = {}
    for rel, versions in cache_map.items():
        # 按时间降序
        versions.sort(key=lambda x: x[0], reverse=True)
        # 优先找 cutoff 之前的
        for mtime, path in versions:
            if mtime <= CUTOFF:
                best[rel] = (mtime, path)
                break
        if rel not in best:
            # 所有版本都在 cutoff 之后（不太可能），取最早的
            best[rel] = versions[-1]
    return best


def main():
    print(f"[scan] 缓存根: {CACHE_ROOT}")
    print(f"[scan] 截止时间: {CUTOFF.isoformat()}")
    cache_map = scan_cache()
    if not cache_map:
        print("[ERROR] 未找到任何 h5_ui 缓存文件")
        return

    print(f"[scan] 找到 {len(cache_map)} 个文件的缓存版本")
    best = find_best_versions(cache_map)

    restored = []
    skipped_same = []
    skipped_missing = []

    for rel, (mtime, cached_path) in sorted(best.items()):
        workspace_path = WORKSPACE / rel
        if not workspace_path.exists():
            # 工作区没有这个文件，直接复制
            workspace_path.parent.mkdir(parents=True, exist_ok=True)
            shutil.copy2(cached_path, workspace_path)
            restored.append((rel, mtime, "NEW"))
            continue

        # 比较内容
        if md5(cached_path) == md5(workspace_path):
            skipped_same.append(rel)
            continue

        # 内容不同，用缓存版本覆盖
        shutil.copy2(cached_path, workspace_path)
        restored.append((rel, mtime, "UPDATED"))

    print(f"\n{'='*60}")
    print(f"恢复结果摘要")
    print(f"{'='*60}")

    if restored:
        print(f"\n已恢复 {len(restored)} 个文件:")
        for rel, mtime, action in restored:
            print(f"  [{action}] {rel}  (缓存时间: {mtime.strftime('%Y-%m-%d %H:%M:%S')})")
    else:
        print("\n没有需要恢复的文件（缓存版本与当前工作区一致）")

    if skipped_same:
        print(f"\n跳过 {len(skipped_same)} 个文件（内容与当前一致）:")
        for rel in skipped_same:
            print(f"  [SAME] {rel}")

    print(f"\n总计: 缓存文件 {len(cache_map)}, 恢复 {len(restored)}, 跳过 {len(skipped_same)}")


if __name__ == "__main__":
    main()