"""MC 服务器状态 —— 业务逻辑(Service 层)。"""

from __future__ import annotations

from base64 import b64decode
from io import BytesIO
from re import findall

from mcstatus import BedrockServer, JavaServer
from nonebot.adapters.onebot.v11 import Message, MessageSegment as MS


def _server_icon(status) -> bytes | None:
    """取服务器图标字节；没有图标或格式不认识就返回 None。

    属性名跨版本换过：mcstatus ≥13 叫 `icon`，11.x/12.x 叫 `favicon`
    （13.0.0 的 changelog：`JavaStatusResponse.favicon` → `icon`，值没变）。
    值可能是完整的 data URI，也可能是不带前缀的裸 base64，两种都认。
    """
    raw = getattr(status, "icon", None) or getattr(status, "favicon", None)
    if not raw:
        return None
    data = raw.split("base64,", 1)[-1] if "base64," in raw else raw
    try:
        return b64decode(data)
    except Exception:  # noqa: BLE001 — 图标坏了不影响其它字段
        return None


async def check_mc_status(
    name: str, host: str, server_type: str
) -> str | Message:
    try:
        if server_type == "js":
            js = await JavaServer.async_lookup(host, timeout=2)
            status = js.status()
            version_list = findall(r"\d+\.\d+(?:\.[\dxX]+)?", status.version.name)
            if len(version_list) != 1:
                version = f"{version_list[0]}-{version_list[-1]}"
            else:
                version = version_list[0]
            online = f"{status.players.online}/{status.players.max}"
            if status.players.online and status.players.sample:
                anonymous_player = 0
                _player_list = []
                for p in status.players.sample:
                    if p.id == "00000000-0000-0000-0000-000000000000":
                        anonymous_player += 1
                    else:
                        _player_list.append(p.name)
                if anonymous_player:
                    _player_list.append(f"[{anonymous_player}个匿名玩家]")
                player_list = "\n".join(_player_list) if _player_list else "没返回玩家列表"
            else:
                player_list = "没人在线"
            latency = round(status.latency)
            icon_data = _server_icon(status)
            icon = MS.image(BytesIO(icon_data)) + "\n" if icon_data else ""
            msg = (
                icon
                + f"名称：{name}\n版本：{version}\n在线：{online}\n延迟：{latency}ms\n在线列表：\n{player_list}"
            )
        else:
            if host.find(":") != -1:
                host, port = host.split(":")
            else:
                host, port = host, 19132
            bds = BedrockServer(host=host, port=int(port))
            status = await bds.async_status()
            online = f"{status.players_online}/{status.players_max}"
            latency = round(status.latency)
            version = status.version.version
            msg = f"名称：{name} 【{version}】\n在线：{online}  延迟：{latency}ms"
    except Exception as e:
        msg = f"名称：{name} 查询失败！\n错误：{repr(e)}"
    return msg