import asyncio
import json
from typing import Optional, Awaitable, Callable

import websockets
from loguru import logger


class GsCoreClient:
    def __init__(self):
        self._ws = None
        self._url: str = ""
        self._token: str = ""
        self._recv_task: Optional[asyncio.Task] = None
        self._message_handler: Optional[Callable[[dict], Awaitable[None]]] = None
        self._is_closing = False

    def configure(self, url: str, handler: Callable[[dict], Awaitable[None]], token: str = "liuwei"):
        self._url = url
        self._message_handler = handler
        self._token = token

    async def connect(self):
        if not self._url:
            logger.warning("[GsCoreClient] gscore_url 未配置，跳过连接")
            return False
        if self._ws is not None:
            return True
        try:
            # 兼容性方案：如果 Header 传参报错，尝试将 token 附加在 URL 参数中
            # 格式变为: ws://ip:port/ws/abot?token=liuwei
            connector_url = self._url
            if "?" in connector_url:
                connector_url += f"&token={self._token}"
            else:
                connector_url += f"?token={self._token}"

            logger.info(f"[GsCoreClient] 正在尝试连接 (兼容模式): {connector_url}")

            # 去掉 extra_headers，避免触发底层 create_connection 的参数检查
            self._ws = await websockets.connect(
                connector_url,
                max_size=10 ** 7
            )

            self._is_closing = False

            if self._recv_task and not self._recv_task.done():
                self._recv_task.cancel()

            loop = asyncio.get_running_loop()
            self._recv_task = loop.create_task(self._recv_loop())
            logger.success("[GsCoreClient] 连接成功")
            return True
        except Exception as e:
            logger.error(f"[GsCoreClient] 连接失败: {e}")
            self._ws = None
            return False

    async def _recv_loop(self):
        while not self._is_closing:
            try:
                if not self._ws:
                    break
                msg = await self._ws.recv()
                msg_str = msg.decode("utf-8") if isinstance(msg, bytes) else msg
                try:
                    payload = json.loads(msg_str)
                    if self._message_handler:
                        await self._message_handler(payload)
                except Exception as e:
                    logger.exception(f"[GsCoreClient] 解析返回失败: {e}")
            except websockets.exceptions.ConnectionClosed as e:
                if not self._is_closing:
                    logger.warning(f"[GsCoreClient] 连接断开 ({e.code})，5秒后重连...")
                    break
                else:
                    break
            except Exception as e:
                logger.exception(f"[GsCoreClient] 接收异常: {e}")
                break
            await asyncio.sleep(0.1)

        if not self._is_closing:
            self._ws = None
            await asyncio.sleep(5)
            await self.connect()

    async def send(self, message: str) -> bool:
        if not self._ws:
            if not await self.connect():
                return False
        try:
            # 显式检查连接状态
            await self._ws.send(message.encode("utf-8"))
            return True
        except (websockets.exceptions.ConnectionClosed, Exception) as e:
            logger.error(f"[GsCoreClient] 发送失败，尝试重连: {e}")
            if await self.reconnect():
                try:
                    await self._ws.send(message.encode("utf-8"))
                    return True
                except Exception:
                    pass
            return False

    async def reconnect(self):
        await self.close(manual=False)
        return await self.connect()

    async def close(self, manual: bool = True):
        self._is_closing = manual
        if self._recv_task:
            self._recv_task.cancel()
            self._recv_task = None
        if self._ws:
            try:
                await self._ws.close()
            except Exception:
                pass
            self._ws = None


gs_core_client = GsCoreClient()