# -*- coding: utf-8 -*-
"""凭据变化时客户端重建测试（不联网）: uv run python tests/test_provider.py"""

import json
import os
import sys
import tempfile
import time
from pathlib import Path

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
sys.stdout.reconfigure(encoding="utf-8")

from reaction_board.bilibili.client import BilibiliClient, Pacer  # noqa: E402
from reaction_board.bilibili.provider import ClientProvider  # noqa: E402
from reaction_board.config import ConfigStore  # noqa: E402


def write_config(path: Path, *, cookie: str, mid: int) -> None:
    path.write_text(json.dumps({
        "bilibili": {
            "read": {"mid": mid, "csrf": "read-csrf", "cookie": cookie},
            "write": {"mid": 2, "csrf": "write-csrf", "cookie": "write-cookie"},
        },
        "folders": [],
    }, ensure_ascii=False), encoding="utf-8")


def bump(path: Path) -> None:
    target = max(path.stat().st_mtime_ns, time.time_ns()) + 1_000_000
    os.utime(path, ns=(target, target))


def test_rebuild_only_when_credentials_change():
    with tempfile.TemporaryDirectory() as tmp:
        path = Path(tmp) / "config.json"
        write_config(path, cookie="cookie-a", mid=1)
        store = ConfigStore(path, env={})
        created = []

        def factory(credentials):
            created.append((credentials.mid, credentials.cookie))
            return BilibiliClient(
                cookie=credentials.cookie,
                csrf=credentials.csrf,
                mid=credentials.mid,
                pacer=Pacer(1.0, 1.6),
            )

        provider = ClientProvider(store, "read", factory)
        first = provider.get()
        assert provider.get() is first
        assert created == [(1, "cookie-a")]

        write_config(path, cookie="cookie-b", mid=1)
        bump(path)
        second = provider.get()
        assert second is not first
        assert created == [(1, "cookie-a"), (1, "cookie-b")]
        assert second.pacer.min_delay == 1.0
        assert second.pacer.max_delay == 1.6

        # 仅 mtime 变化但凭据相同：不重建
        bump(path)
        assert provider.get() is second
        assert len(created) == 2


def test_mid_change_rebuilds():
    with tempfile.TemporaryDirectory() as tmp:
        path = Path(tmp) / "config.json"
        write_config(path, cookie="cookie-a", mid=1)
        store = ConfigStore(path, env={})
        provider = ClientProvider(
            store, "read",
            lambda credentials: BilibiliClient(mid=credentials.mid),
        )
        assert provider.get().mid == 1
        write_config(path, cookie="cookie-a", mid=9)
        bump(path)
        assert provider.get().mid == 9


def test_config_revision_increments():
    with tempfile.TemporaryDirectory() as tmp:
        path = Path(tmp) / "config.json"
        write_config(path, cookie="cookie-a", mid=1)
        store = ConfigStore(path, env={})
        assert store.revision == 0
        write_config(path, cookie="cookie-b", mid=1)
        bump(path)
        store.get()
        assert store.revision == 1
        store.get()
        assert store.revision == 1


def main():
    test_rebuild_only_when_credentials_change()
    test_mid_change_rebuilds()
    test_config_revision_increments()
    print("OK: 凭据变化重建客户端与配置 revision 测试全部通过")


if __name__ == "__main__":
    main()