#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""M11b-3 代码镜像同步器：modules/world_sync/ 是唯一真源，
apps/scense/pkgs/world_sync/ 是打包镜像（宿主 build.sh 从应用仓库安装，禁止手工双写）。

与 sync_models_to_app.py（只管 models/）互补，本脚本同步 **Python 包与测试**：
  - world_sync/*.py（包源码，含 pbl_runtime_broadcast.py）
  - tests/*.py（含 test_m11b3_post_commit_broadcast.py）
  - skill/SKILL.md、README.md

用法:
    python modules/world_sync/scripts/sync_code_to_app.py           # 同步
    python modules/world_sync/scripts/sync_code_to_app.py --check   # 只校验 sha256

行为：逐文件以同一份字节覆盖镜像落点，打印两两 sha256 比对；--check 不一致退出码 1。
"""

from __future__ import annotations

import argparse
import hashlib
import os
import sys

HERE = os.path.dirname(os.path.abspath(__file__))
WS_ROOT = os.path.abspath(os.path.join(HERE, "..", "..", ".."))

SRC_ROOT = os.path.join("modules", "world_sync")
DST_ROOT = os.path.join("apps", "scense", "pkgs", "world_sync")

#: 需要镜像的相对路径（真源 = modules/world_sync/）
MIRROR_SUBDIRS = ("world_sync", "tests")
MIRROR_FILES = ("README.md", os.path.join("skill", "SKILL.md"))
#: 不同步的产物/缓存
SKIP_SUFFIX = ("__pycache__", ".pyc", ".egg-info", ".pytest_cache")


def sha256_of(path: str) -> str:
    h = hashlib.sha256()
    with open(path, "rb") as fh:
        for chunk in iter(lambda: fh.read(65536), b""):
            h.update(chunk)
    return h.hexdigest()


def collect() -> list:
    rels = []
    for sub in MIRROR_SUBDIRS:
        base = os.path.join(SRC_ROOT, sub)
        if not os.path.isdir(base):
            continue
        for name in sorted(os.listdir(base)):
            if any(s in name for s in SKIP_SUFFIX):
                continue
            if not name.endswith(".py"):
                continue
            rels.append(os.path.join(sub, name))
    for rel in MIRROR_FILES:
        if os.path.isfile(os.path.join(SRC_ROOT, rel)):
            rels.append(rel)
    return rels


def main() -> int:
    ap = argparse.ArgumentParser()
    ap.add_argument("--check", action="store_true", help="只校验，不写入")
    args = ap.parse_args()

    bad = 0
    for rel in collect():
        src = os.path.join(WS_ROOT, SRC_ROOT, rel)
        dst = os.path.join(WS_ROOT, DST_ROOT, rel)
        src_sha = sha256_of(src)
        same = os.path.isfile(dst) and sha256_of(dst) == src_sha
        if args.check:
            print("%-58s %s" % (rel, "OK" if same else "DRIFT"))
            if not same:
                bad += 1
            continue
        os.makedirs(os.path.dirname(dst), exist_ok=True)
        with open(src, "rb") as fh:
            data = fh.read()
        with open(dst, "wb") as fh:
            fh.write(data)
        ok = sha256_of(dst) == src_sha
        print("%-58s %s sha256=%s" % (rel, "SYNCED" if ok else "FAIL", src_sha[:12]))
        if not ok:
            bad += 1
    if bad:
        print("RESULT: FAIL (%d 项不一致)" % bad)
        return 1
    print("RESULT: PASS (镜像与真源逐文件 sha256 一致)")
    return 0


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