"""
WechatHookBot - 主入口

基于新版 HTTP Hook API 的微信机器人框架

特点：
- HTTP 回调接收消息
- HTTP API 发送消息
- 无需 DLL 注入（DLL 放到微信目录自动加载）
- 优先级消息队列
- 自适应熔断器
- 配置热更新
- 性能监控
- 优雅关闭
"""

import asyncio
import signal
import sys
import time
from pathlib import Path
from loguru import logger

from WechatHook import WechatHookClient
from WechatHook.http_server import CallbackServer
from WechatHook.message_types import normalize_from_callback, get_internal_msg_type
from utils.hookbot import HookBot
from utils.config_manager import get_config, get_main_config_path, get_project_root
from utils.plugin_manager import PluginManager
from utils.decorators import scheduler
from utils.message_queue import PriorityMessageQueue, MessagePriority
from utils.bot_utils import (
    PRIORITY_MESSAGE_TYPES,
    AdaptiveCircuitBreaker,
    ConfigWatcher,
    PerformanceMonitor,
    get_performance_monitor
)
from utils.operation_lock import OperationLock


class BotService:
    """机器人服务类"""

    def __init__(self):
        self.base_dir = get_project_root()
        self.config_path = get_main_config_path()
        self.client: WechatHookClient = None
        self.callback_server: CallbackServer = None
        self.hookbot: HookBot = None
        self.plugin_manager: PluginManager = None
        self.is_running = False
        self.is_shutting_down = False
        self.event_loop = None

        # 消息队列和性能控制
        self.message_queue: PriorityMessageQueue = None
        self.queue_config = {}
        self.concurrency_config = {}
        self.consumer_tasks = []
        self.processing_semaphore = None

        # 自适应熔断器
        self.circuit_breaker: AdaptiveCircuitBreaker = None

        # 配置热更新
        self.config_watcher: ConfigWatcher = None

        # 性能监控
        self.performance_monitor: PerformanceMonitor = None

        # 配置
        self.config = {}

        # WebUI
        self.webui_server = None

    async def on_message_callback(self, message_type: str, data: dict):
        """
        HTTP 回调消息处理

        Args:
            message_type: 消息类型 (private_message/group_message/moments_message/chatroom_member_add/chatroom_member_remove/chatroom_info_change/chatroom_member_nickname_change)
            data: 原始消息数据
        """
        if OperationLock.is_paused():
            logger.debug(f"更新中忽略消息: type={message_type}")
            return

        if self.is_shutting_down:
            logger.debug(f"关闭中忽略消息: type={message_type}")
            return

        # 跳过朋友圈消息
        if message_type == "moments_message":
            logger.debug("跳过朋友圈消息")
            return

        # 处理群事件（event_type 类型的消息）
        if message_type in ["chatroom_member_add", "chatroom_member_remove", "chatroom_info_change", "chatroom_member_nickname_change"]:
            await self._handle_chatroom_event(message_type, data)
            return

        # 使用消息队列处理普通消息
        if self.message_queue and self.event_loop:
            try:
                await self._enqueue_message(message_type, data)
            except Exception as e:
                logger.error(f"消息入队失败: {e}")
        else:
            logger.warning(f"消息队列未就绪: queue={self.message_queue is not None}, loop={self.event_loop is not None}")

    async def _handle_chatroom_event(self, event_type: str, data: dict):
        """
        处理群事件（event_type 类型的消息）

        Args:
            event_type: 事件类型 (chatroom_member_add/chatroom_member_remove/chatroom_info_change/chatroom_member_nickname_change)
            data: 原始事件数据
        """
        try:
            logger.info(f"[群事件] 收到事件: {event_type}")

            # 提取事件数据
            event_data = data.get("data", {})
            room_wxid = event_data.get("roomid", "")
            member_count = event_data.get("membercount", 0)
            member_list_data = event_data.get("memberlist", {})

            # 构造标准化的消息格式
            normalized_msg = {
                "MsgType": self._get_event_msg_type(event_type),
                "RoomWxid": room_wxid,
                "MemberCount": member_count,
                "MemberList": [],
            }

            # 处理成员列表（可能是单个对象或数组）
            if isinstance(member_list_data, dict):
                # 单个成员
                member_info = {
                    "wxid": member_list_data.get("userName", ""),
                    "nickname": member_list_data.get("nickName", ""),
                    "display_name": member_list_data.get("displayName", ""),
                    "avatar": member_list_data.get("bigHeadImgUrl", ""),
                }
                normalized_msg["MemberList"].append(member_info)
            elif isinstance(member_list_data, list):
                # 多个成员
                for member in member_list_data:
                    member_info = {
                        "wxid": member.get("userName", ""),
                        "nickname": member.get("nickName", ""),
                        "display_name": member.get("displayName", ""),
                        "avatar": member.get("bigHeadImgUrl", ""),
                    }
                    normalized_msg["MemberList"].append(member_info)

            logger.info(f"[群事件] 标准化消息: room={room_wxid}, members={len(normalized_msg['MemberList'])}")

            # 直接触发事件（不经过消息队列）
            from utils.event_manager import EventManager
            await EventManager.emit(event_type, self.client, normalized_msg)

        except Exception as e:
            logger.error(f"处理群事件失败: {e}")
            import traceback
            logger.error(f"详细错误: {traceback.format_exc()}")

    def _get_event_msg_type(self, event_type: str) -> int:
        """获取事件对应的消息类型码"""
        from WechatHook.message_types import MessageType
        event_map = {
            "chatroom_member_add": MessageType.MT_CHATROOM_MEMBER_ADD,
            "chatroom_member_remove": MessageType.MT_CHATROOM_MEMBER_REMOVE,
            "chatroom_info_change": MessageType.MT_CHATROOM_INFO_CHANGE,
            "chatroom_member_nickname_change": MessageType.MT_CHATROOM_MEMBER_NICKNAME_CHANGE,
        }
        return event_map.get(event_type, 11046)

    async def _enqueue_message(self, message_type: str, data: dict):
        """将消息加入优先级队列"""
        try:
            # 记录收到消息
            if self.performance_monitor:
                self.performance_monitor.record_message_received()

            # 获取内部消息类型
            wechat_msg_type = str(data.get("msgType", "1"))
            internal_type = get_internal_msg_type(wechat_msg_type, data)

            priority = PRIORITY_MESSAGE_TYPES.get(internal_type, MessagePriority.NORMAL)

            # 将消息放入优先级队列
            # 存储 (message_type, data) 元组
            accepted = await self.message_queue.put(
                internal_type,
                {"_callback_type": message_type, **data},
                priority=priority
            )
            if not accepted:
                if self.performance_monitor:
                    self.performance_monitor.record_message_dropped()
                return

            # 记录队列大小
            if self.performance_monitor:
                self.performance_monitor.record_queue_size(self.message_queue.qsize())

        except Exception as e:
            logger.error(f"消息入队异常: {e}")

    async def _ensure_consumer_count(self, target_count: int):
        """按目标数量调整消费者协程。"""
        target_count = max(int(target_count), 1)
        current_count = len(self.consumer_tasks)

        if target_count > current_count:
            for consumer_id in range(current_count, target_count):
                consumer_task = asyncio.create_task(self._message_consumer(consumer_id))
                self.consumer_tasks.append(consumer_task)
            logger.info(f"消息消费者数量已扩容到 {target_count}")
            return

        if target_count < current_count:
            tasks_to_stop = self.consumer_tasks[target_count:]
            self.consumer_tasks = self.consumer_tasks[:target_count]
            for task in tasks_to_stop:
                task.cancel()
            await asyncio.gather(*tasks_to_stop, return_exceptions=True)
            logger.info(f"消息消费者数量已缩容到 {target_count}")

    async def _message_consumer(self, consumer_id: int):
        """消息消费者协程"""
        logger.info(f"消息消费者 {consumer_id} 已启动")

        while True:
            if self.is_shutting_down and (not self.message_queue or self.message_queue.empty()):
                break

            try:
                if OperationLock.is_paused():
                    await OperationLock.wait_if_paused()
                    continue

                message_acquired = False
                msg_type = None
                data = None

                try:
                    # 从队列获取消息
                    msg_type, data = await asyncio.wait_for(
                        self.message_queue.get(),
                        timeout=1.0
                    )
                    message_acquired = True

                    # 检查熔断器状态
                    if self.circuit_breaker and self.circuit_breaker.is_open():
                        logger.debug("熔断器开启，跳过消息处理")
                        self.circuit_breaker.record_rejection()
                        continue

                    # 标准化消息
                    callback_type = data.pop("_callback_type", "private_message")
                    normalized_msg = normalize_from_callback(callback_type, data)

                    # 从消息中提取群成员信息并缓存
                    if callback_type == "group_message" and self.client:
                        sender_profile = data.get("sender_profile") or {}
                        new_chatroom_data = sender_profile.get("newChatroomData") or {}
                        members = new_chatroom_data.get("chatRoomMember") or []
                        room_id = normalized_msg.get("RoomWxid", "")
                        if members and room_id:
                            self.client.update_chatroom_members_cache(room_id, members)

                    # 处理消息
                    timeout = self.concurrency_config.get("plugin_task_timeout_seconds", 720)
                    start_time = time.time()

                    try:
                        if self.processing_semaphore:
                            async with self.processing_semaphore:
                                await asyncio.wait_for(
                                    self.hookbot.process_message(msg_type, normalized_msg),
                                    timeout=timeout
                                )
                        else:
                            await asyncio.wait_for(
                                self.hookbot.process_message(msg_type, normalized_msg),
                                timeout=timeout
                            )

                        processing_time = time.time() - start_time
                        if self.circuit_breaker:
                            self.circuit_breaker.record_success()
                        if self.performance_monitor:
                            self.performance_monitor.record_message_processed(processing_time)

                    except asyncio.TimeoutError:
                        logger.warning(f"消息处理超时 (>{timeout}s): type={msg_type}")
                        if self.circuit_breaker:
                            self.circuit_breaker.record_failure()
                        if self.performance_monitor:
                            self.performance_monitor.record_message_failed()

                    except Exception as e:
                        logger.error(f"消息处理异常: {e}")
                        if self.circuit_breaker:
                            self.circuit_breaker.record_failure()
                        if self.performance_monitor:
                            self.performance_monitor.record_message_failed()

                    # 更新熔断器统计
                    if self.performance_monitor and self.circuit_breaker:
                        self.performance_monitor.update_circuit_breaker_stats(
                            self.circuit_breaker.get_stats()
                        )

                    # 消息间隔
                    message_interval = self.concurrency_config.get("message_interval_ms", 100)
                    if message_interval > 0:
                        await asyncio.sleep(message_interval / 1000.0)

                except asyncio.TimeoutError:
                    if self.is_shutting_down and self.message_queue and self.message_queue.empty():
                        break
                    continue
                finally:
                    if message_acquired and self.message_queue:
                        self.message_queue.task_done()

            except asyncio.CancelledError:
                logger.info(f"消费者 {consumer_id} 收到取消信号")
                break
            except Exception as e:
                logger.error(f"消费者 {consumer_id} 异常: {e}")
                import traceback
                logger.error(traceback.format_exc())
                await asyncio.sleep(0.1)

        logger.info(f"消费者 {consumer_id} 已退出")

    async def initialize(self):
        """初始化系统"""
        logger.info("=" * 60)
        logger.info("WechatHookBot 启动中... (HTTP 协议版本)")
        logger.info("=" * 60)

        self.event_loop = asyncio.get_event_loop()

        # 读取配置
        config_path = self.config_path
        if not config_path.exists():
            logger.error(f"配置文件不存在: {config_path}")
            return False

        self.config = get_config().get_all()

        # 初始化性能配置
        self.queue_config = self.config.get("Queue", {})
        self.concurrency_config = self.config.get("Concurrency", {})

        # 创建优先级消息队列
        self.message_queue = PriorityMessageQueue.from_config(self.queue_config)
        logger.info(
            f"优先级消息队列已创建，容量: {self.message_queue.maxsize}, "
            f"溢出策略: {self.message_queue.overflow_strategy.value}"
        )

        # 创建并发控制信号量
        max_concurrency = self.concurrency_config.get("plugin_max_concurrency", 8)
        self.processing_semaphore = asyncio.Semaphore(max_concurrency)
        logger.info(f"并发控制已设置，最大并发: {max_concurrency}")

        # 创建自适应熔断器
        if self.concurrency_config.get("enable_circuit_breaker", True):
            self.circuit_breaker = AdaptiveCircuitBreaker(
                failure_threshold=self.concurrency_config.get("circuit_breaker_threshold", 10),
                success_threshold=3,
                initial_recovery_time=5.0,
                max_recovery_time=300.0
            )
            logger.info("自适应熔断器已创建")

        # 创建性能监控器
        self.performance_monitor = get_performance_monitor()
        logger.info("性能监控器已创建")

        # 创建配置热更新监听器
        self.config_watcher = ConfigWatcher(str(self.config_path), check_interval=5.0)
        self.config_watcher.register_callback(self._on_config_update)
        await self.config_watcher.start()
        logger.info("配置热更新监听器已启动")

        # 获取 HTTP 配置
        http_config = self.config.get("HttpHook", {})
        api_base_url = http_config.get("api-url", "http://127.0.0.1:8888")
        callback_host = http_config.get("callback-host", "0.0.0.0")
        callback_port = http_config.get("callback-port", 9999)

        # 创建 HTTP 客户端
        logger.info(f"连接 Hook API: {api_base_url}")
        self.client = WechatHookClient(base_url=api_base_url)

        # 创建 HookBot
        self.hookbot = HookBot(self.client)

        # 微信初始化（刷新好友列表、群列表缓存）
        logger.info("执行微信初始化...")
        if await self.client.wechat_init():
            logger.success("微信初始化成功")
        else:
            logger.warning("微信初始化失败，部分功能可能受影响")

        # 获取登录信息
        logger.info("获取登录信息...")
        login_info = await self.client.get_login_info()

        if login_info and self.client.wxid:
            logger.success(f"获取登录信息成功: wxid={self.client.wxid}, nickname={self.client.nickname}")
            self.hookbot.update_profile(self.client.wxid, self.client.nickname)
        else:
            # 使用配置中的备用信息
            bot_config = self.config.get("Bot", {})
            fallback_wxid = bot_config.get("wxid", "unknown")
            fallback_nickname = bot_config.get("nickname", "HookBot")
            logger.warning(f"获取登录信息失败，使用配置中的备用信息: {fallback_wxid}")
            self.hookbot.update_profile(fallback_wxid, fallback_nickname)

        # 创建并启动回调服务器
        logger.info(f"启动回调服务器: {callback_host}:{callback_port}")
        self.callback_server = CallbackServer(host=callback_host, port=callback_port)
        self.callback_server.add_message_handler(self.on_message_callback)

        if not await self.callback_server.start():
            logger.error("回调服务器启动失败")
            return False

        # 启动 WebUI
        webui_config = self.config.get("WebUI", {})
        if webui_config.get("enabled", False):
            try:
                from utils.webui import WebUIServer
                webui_host = webui_config.get("host", "0.0.0.0")
                webui_port = webui_config.get("port", 5001)
                self.webui_server = WebUIServer(host=webui_host, port=webui_port, config_path=str(self.config_path))
                await self.webui_server.start()
            except Exception as e:
                logger.error(f"WebUI 启动失败: {e}")

        # 加载插件
        logger.info("加载插件...")
        self.plugin_manager = PluginManager()
        self.plugin_manager.set_bot(self.client)
        loaded_plugins = await self.plugin_manager.load_plugins(load_disabled=False)
        logger.success(f"已加载插件: {loaded_plugins}")

        # 启动消息消费者
        consumer_count = self.queue_config.get("consumer_count", 1)
        await self._ensure_consumer_count(consumer_count)
        logger.success(f"已启动 {consumer_count} 个消息消费者")

        # 启动定时任务
        if scheduler.state == 0:
            scheduler.start()
        logger.success("定时任务已启动")

        # 记录启动时间
        self.start_time = int(time.time())

        logger.success("=" * 60)
        logger.success("WechatHookBot 启动成功！")
        logger.success(f"回调地址: http://{callback_host}:{callback_port}")
        logger.success("请确保 Hook 已配置正确的回调地址")
        logger.success("=" * 60)

        return True

    async def _on_config_update(self, new_config: dict):
        """配置热更新回调"""
        logger.info("正在应用新配置...")

        self.config = new_config or self.config
        old_queue = self.queue_config
        self.queue_config = new_config.get("Queue", self.queue_config)
        old_concurrency = self.concurrency_config
        self.concurrency_config = new_config.get("Concurrency", self.concurrency_config)

        if self.message_queue:
            await self.message_queue.update_config(
                maxsize=self.queue_config.get("max_size", self.message_queue.maxsize),
                overflow_strategy=self.queue_config.get("overflow_strategy", self.message_queue.overflow_strategy.value),
                sampling_rate=self.queue_config.get("sampling_rate", self.message_queue.sampling_rate),
            )
            logger.info(
                f"消息队列配置已更新: max_size={self.message_queue.maxsize}, "
                f"overflow={self.message_queue.overflow_strategy.value}"
            )

        enable_circuit_breaker = self.concurrency_config.get("enable_circuit_breaker", True)
        if enable_circuit_breaker and not self.circuit_breaker:
            self.circuit_breaker = AdaptiveCircuitBreaker(
                failure_threshold=self.concurrency_config.get("circuit_breaker_threshold", 10),
                success_threshold=3,
                initial_recovery_time=5.0,
                max_recovery_time=300.0
            )
            logger.info("已按新配置启用熔断器")
        elif not enable_circuit_breaker and self.circuit_breaker:
            self.circuit_breaker = None
            logger.info("已按新配置禁用熔断器")

        if self.circuit_breaker:
            new_threshold = self.concurrency_config.get("circuit_breaker_threshold", 10)
            if new_threshold != old_concurrency.get("circuit_breaker_threshold", 10):
                self.circuit_breaker.failure_threshold = new_threshold
                logger.info(f"熔断器阈值已更新: {new_threshold}")

        new_max_concurrency = self.concurrency_config.get("plugin_max_concurrency", 8)
        if new_max_concurrency != old_concurrency.get("plugin_max_concurrency", 8):
            self.processing_semaphore = asyncio.Semaphore(new_max_concurrency)
            logger.info(f"插件并发上限已更新: {new_max_concurrency}")

        new_consumer_count = self.queue_config.get("consumer_count", len(self.consumer_tasks) or 1)
        if new_consumer_count != len(self.consumer_tasks):
            await self._ensure_consumer_count(new_consumer_count)

        if self.queue_config.get("consumer_count") != old_queue.get("consumer_count"):
            logger.info(f"消息消费者数量已更新: {new_consumer_count}")

        logger.success("配置热更新完成")

    async def run(self):
        """运行机器人"""
        if not await self.initialize():
            return

        self.is_running = True

        # 启动定期性能报告
        async def periodic_stats():
            while self.is_running:
                await asyncio.sleep(300)
                if self.performance_monitor and self.is_running:
                    self.performance_monitor.print_stats()

        stats_task = asyncio.create_task(periodic_stats())

        try:
            logger.info("机器人正在运行，按 Ctrl+C 停止...")
            while self.is_running:
                await asyncio.sleep(1)
        except KeyboardInterrupt:
            logger.info("收到停止信号...")
        finally:
            stats_task.cancel()
            await self.stop()

    async def stop(self):
        """优雅关闭机器人"""
        if self.is_shutting_down:
            return
        self.is_shutting_down = True

        logger.info("=" * 60)
        logger.info("正在优雅关闭机器人...")
        logger.info("=" * 60)

        # 1. 停止接收新消息
        self.is_running = False
        logger.info("[1/7] 停止接收新消息")

        if self.callback_server:
            logger.info("[1/7] 关闭消息入口...")
            await self.callback_server.stop()
            logger.info("[1/7] 消息入口已关闭")

        # 2. 等待队列中的消息处理完成
        if self.message_queue and not self.message_queue.empty():
            queue_size = self.message_queue.qsize()
            logger.info(f"[2/7] 等待队列中 {queue_size} 条消息处理完成...")
            try:
                await asyncio.wait_for(self.message_queue.join(), timeout=30)
                logger.info("[2/7] 队列消息已全部处理完成")
            except asyncio.TimeoutError:
                logger.warning("[2/7] 队列消息未在 30 秒内处理完成，将在停止消费者后清空剩余消息")
        else:
            logger.info("[2/7] 队列为空，无需等待")

        # 3. 停止消息消费者
        if self.consumer_tasks:
            logger.info(f"[3/7] 停止 {len(self.consumer_tasks)} 个消息消费者...")
            for task in self.consumer_tasks:
                task.cancel()
            await asyncio.gather(*self.consumer_tasks, return_exceptions=True)
            self.consumer_tasks.clear()
            logger.info("[3/7] 消息消费者已停止")
        else:
            logger.info("[3/7] 无消费者需要停止")

        # 4. 回调服务器已在前面关闭，这里仅补充日志
        if self.callback_server:
            logger.info("[4/7] 回调服务器已停止")
        else:
            logger.info("[4/7] 无回调服务器")

        # 4.5 停止 WebUI
        if self.webui_server:
            await self.webui_server.stop()

        # 5. 停止配置监听器
        if self.config_watcher:
            logger.info("[5/7] 停止配置监听器...")
            await self.config_watcher.stop()
            logger.info("[5/7] 配置监听器已停止")
        else:
            logger.info("[5/7] 无配置监听器")

        # 6. 卸载插件
        if self.plugin_manager:
            logger.info("[6/7] 卸载插件...")
            await self.plugin_manager.unload_plugins()
            logger.info("[6/7] 插件已卸载")
        else:
            logger.info("[6/7] 无插件需要卸载")

        # 7. 停止定时任务和关闭客户端
        logger.info("[7/7] 清理资源...")
        if self.message_queue and not self.message_queue.empty():
            remaining = self.message_queue.qsize()
            self.message_queue.clear()
            logger.warning(f"[7/7] 已清空剩余队列消息: {remaining}")

        if scheduler.running:
            scheduler.shutdown()

        if self.client:
            await self.client.close()

        # 输出最终性能报告
        if self.performance_monitor:
            logger.info("最终性能报告:")
            self.performance_monitor.print_stats()

        logger.success("=" * 60)
        logger.success("机器人已优雅关闭")
        logger.success("=" * 60)


async def main():
    """主函数"""
    # 读取性能配置
    project_root = get_project_root()
    logs_dir = project_root / "logs"
    logs_dir.mkdir(parents=True, exist_ok=True)
    config_path = get_main_config_path()
    if config_path.exists():
        perf_config = get_config().get_section("Performance")
    else:
        perf_config = {}

    # 配置日志
    logger.remove()

    console_enabled = perf_config.get("log_console_enabled", True)
    logger.add(
        sys.stdout,
        colorize=perf_config.get("log_colorize", True),
        format="<green>{time:YYYY-MM-DD HH:mm:ss}</green> | <level>{level}</level> | {message}",
        level=perf_config.get("log_level_console", "INFO"),
        filter=lambda record: console_enabled or "启动" in record["message"] or "初始化" in record["message"] or "成功" in record["message"] or "失败" in record["message"] or "错误" in record["message"]
    )

    logger.add(
        str(logs_dir / "hookbot.log"),
        format="{time:YYYY-MM-DD HH:mm:ss} | {level} | {message}",
        encoding="utf-8",
        rotation="5mb",
        retention="1 week",
        level=perf_config.get("log_level_file", "INFO")
    )

    # WebUI 日志 sink
    try:
        from utils.webui import loguru_sink
        logger.add(
            loguru_sink,
            format="{time:YYYY-MM-DD HH:mm:ss} | {level} | {message}",
            level=perf_config.get("log_level_console", "INFO"),
        )
    except Exception:
        pass

    # 创建并运行服务
    service = BotService()
    await service.run()


if __name__ == "__main__":
    # 注意：新协议不再需要 32 位 Python
    asyncio.run(main())