# -*- coding: utf-8 -*-
"""验证回退（撤销）系统。

要点：
  * 可回退的操作执行后会自动进回退列表
  * 回退能把状态真的改回去
  * **不可回退的操作（关机、删文件、杀进程）不该被记录** ——
    记了会给用户"还能退回去"的错觉，反而危险
"""
import sys
import tempfile
import time
from pathlib import Path

ROOT = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(ROOT / "windows"))

from lanremote.actions import Actions                          # noqa: E402
from lanremote.config import Store                             # noqa: E402
from lanremote.features import Features                        # noqa: E402
from lanremote.headless import HeadlessUI                      # noqa: E402

passed = 0
failed = 0


def check(name, ok, detail=""):
    global passed, failed
    if ok:
        passed += 1
        print("  [PASS] " + name)
    else:
        failed += 1
        print("  [FAIL] " + name + "  " + str(detail))


def main() -> int:
    store = Store(Path(tempfile.mkdtemp()))
    ui = HeadlessUI(store)
    features = Features(Actions(ui, store))
    ui.root

    print("一、三个回退功能都在")
    defs = features.defs()
    names = {d["name"] for d in defs}
    for required in ("undo_last", "undo_all", "undo_list"):
        check("声明了 " + required, required in names)
    check("功能总数 > 200", len(defs) > 200, len(defs))

    print()
    print("二、初始没有可回退的")
    check("undo_list 说没有",
          "没有" in features.run("undo_list", {}),
          features.run("undo_list", {}))
    check("undo_last 说没有",
          "没有" in features.run("undo_last", {}),
          features.run("undo_last", {}))

    print()
    print("三、做几个可回退的操作")
    features.run("shuffle_play", {"on": True})
    check("开关被记为可回退", len(features._undo_stack()) == 1,
          len(features._undo_stack()))
    features.run("loop_play", {"on": True})
    features.run("big_text", {"text": "回退测试"})
    check("三步都记上了", len(features._undo_stack()) == 3,
          len(features._undo_stack()))

    listing = features.run("undo_list", {})
    check("undo_list 列了三步", "3 步" in listing, listing)
    check("看得到操作描述",
          "回退测试" in listing or "随机播放" in listing, listing)

    print()
    print("四、开关的状态确实是开着的，回退要能关掉")
    check("shuffle_play 现在是开的", store.get("shuffle_play") is True,
          store.get("shuffle_play"))
    check("loop_play 现在是开的", store.get("loop_play") is True,
          store.get("loop_play"))

    # 最近一步是 big_text，先退它
    result = features.run("undo_last", {})
    check("回退上一步成功", "已回退" in result, result)
    check("回退后列表少一条", len(features._undo_stack()) == 2,
          len(features._undo_stack()))

    # 再退两步，应该把两个开关关掉
    features.run("undo_last", {})
    features.run("undo_last", {})
    check("shuffle_play 被关回去了", store.get("shuffle_play") is False,
          store.get("shuffle_play"))
    check("loop_play 被关回去了", store.get("loop_play") is False,
          store.get("loop_play"))
    check("列表清空了", len(features._undo_stack()) == 0,
          len(features._undo_stack()))

    print()
    print("五、undo_all 批量回退")
    features.run("shuffle_play", {"on": True})
    features.run("loop_play", {"on": True})
    features.run("big_text", {"text": "批量测试"})
    check("攒了 3 步", len(features._undo_stack()) == 3,
          len(features._undo_stack()))
    result = features.run("undo_all", {})
    check("undo_all 说回退了 3 步", "3 步" in result, result)
    check("开关都回去了", store.get("shuffle_play") is False
          and store.get("loop_play") is False,
          f"{store.get('shuffle_play')}/{store.get('loop_play')}")
    check("列表空了", len(features._undo_stack()) == 0,
          len(features._undo_stack()))

    print()
    print("六、撤不回来的操作不该被记录")
    # 这些都是破坏性的 / 不可逆的
    for name in ("kill_games", "clean_temp", "lock_now", "net_reset"):
        try:
            features.run(name, {})
        except Exception:                                 # noqa: BLE001
            pass
    check("破坏性操作没有进回退列表",
          len(features._undo_stack()) == 0, len(features._undo_stack()))
    check("IRREVERSIBLE 里有 kill_games",
          "kill_games" in Features.IRREVERSIBLE)
    check("IRREVERSIBLE 里有 delete_file",
          "delete_file" in Features.IRREVERSIBLE)
    check("IRREVERSIBLE 里有 shutdown",
          "shutdown" in Features.IRREVERSIBLE)

    print()
    print("七、回退不会来回横跳")
    features.run("shuffle_play", {"on": True})
    stack_before = len(features._undo_stack())
    features.run("undo_last", {})
    check("回退后不会又记一条新的",
          len(features._undo_stack()) == stack_before - 1,
          f"{stack_before} -> {len(features._undo_stack())}")

    print()
    print("八、全部 toggle 都能记录回退")
    toggles = [d for d in defs if d.get("kind") == "toggle"]
    # 别写死数量 —— 加功能时这里会假失败（relay_saver 就踩过一次）。
    # 真正要保证的是：开关数量合理，且**每一个**都能回退。
    check("开关数量合理（>= 15）", len(toggles) >= 15, len(toggles))
    check("开关类都算可回退",
          all(d["name"] not in Features.IRREVERSIBLE for d in toggles),
          str([d["name"] for d in toggles
               if d["name"] in Features.IRREVERSIBLE]))

    ui.stop()
    print()
    print("=" * 60)
    print(f"通过 {passed} 项，失败 {failed} 项")
    return 0 if failed == 0 else 1


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