from typing import Dict, Any, Optional, Callable
from bosha.server.utils import info, warning, error, exception
from bosha.server.config import settings

class AgoraService:
    """声网服务类，用于集成声网SDK，接收视频流"""
    
    def __init__(self):
        """初始化声网服务"""
        self.agora_engine = None
        self.initialized = False
        self.channels = {}  # 存储频道信息
        
        # 初始化声网SDK
        self.init_agora()
    
    def init_agora(self):
        """初始化声网SDK"""
        try:
            # 示例：实际应使用声网SDK初始化
            # 例如使用声网的RtcEngine
            # from agora_rtc_sdk import RtcEngine
            # self.agora_engine = RtcEngine()
            # self.agora_engine.initialize(settings.AGORA_APP_ID)
            
            # 模拟初始化成功
            self.agora_engine = True
            self.initialized = True
            info("声网SDK初始化成功")
            
        except Exception as e:
            exception(f"初始化声网SDK失败: {e}")
            self.initialized = False
    
    def join_channel(self, channel_name: str, uid: int, token: str = "") -> bool:
        """
        加入声网频道
        
        Args:
            channel_name: 频道名称
            uid: 用户ID
            token: 声网Token
            
        Returns:
            bool: 加入结果
        """
        try:
            if not self.initialized:
                warning("声网SDK未初始化")
                return False
            
            # 检查是否已经加入了该频道
            if channel_name in self.channels:
                warning(f"已经加入了频道 {channel_name}")
                return True
            
            # 示例：实际应使用声网SDK加入频道
            # self.agora_engine.join_channel(token, channel_name, "", uid)
            
            # 模拟加入频道成功
            self.channels[channel_name] = {
                "name": channel_name,
                "uid": uid,
                "token": token,
                "joined": True
            }
            
            info(f"成功加入频道 {channel_name}，UID: {uid}")
            return True
            
        except Exception as e:
            exception(f"加入频道 {channel_name} 失败: {e}")
            return False
    
    def leave_channel(self, channel_name: str) -> bool:
        """
        离开声网频道
        
        Args:
            channel_name: 频道名称
            
        Returns:
            bool: 离开结果
        """
        try:
            if not self.initialized:
                warning("声网SDK未初始化")
                return False
            
            # 检查是否加入了该频道
            if channel_name not in self.channels:
                warning(f"未加入频道 {channel_name}")
                return True
            
            # 示例：实际应使用声网SDK离开频道
            # self.agora_engine.leave_channel()
            
            # 模拟离开频道成功
            del self.channels[channel_name]
            info(f"成功离开频道 {channel_name}")
            return True
            
        except Exception as e:
            exception(f"离开频道 {channel_name} 失败: {e}")
            return False
    
    def start_video_stream(self, channel_name: str, callback: Callable) -> bool:
        """
        开始接收视频流
        
        Args:
            channel_name: 频道名称
            callback: 视频帧回调函数
            
        Returns:
            bool: 操作结果
        """
        try:
            if not self.initialized:
                warning("声网SDK未初始化")
                return False
            
            # 检查是否已经加入了该频道
            if channel_name not in self.channels:
                warning(f"未加入频道 {channel_name}")
                return False
            
            # 示例：实际应使用声网SDK设置视频帧回调
            # self.agora_engine.set_video_frame_callback(callback)
            # self.agora_engine.enable_video()
            
            info(f"开始接收频道 {channel_name} 的视频流")
            return True
            
        except Exception as e:
            exception(f"开始接收视频流失败: {e}")
            return False
    
    def stop_video_stream(self, channel_name: str) -> bool:
        """
        停止接收视频流
        
        Args:
            channel_name: 频道名称
            
        Returns:
            bool: 操作结果
        """
        try:
            if not self.initialized:
                warning("声网SDK未初始化")
                return False
            
            # 示例：实际应使用声网SDK停止视频流
            # self.agora_engine.disable_video()
            
            info(f"停止接收频道 {channel_name} 的视频流")
            return True
            
        except Exception as e:
            exception(f"停止接收视频流失败: {e}")
            return False
    
    def generate_token(self, channel_name: str, uid: int, expire: int = 3600) -> str:
        """
        生成声网Token
        
        Args:
            channel_name: 频道名称
            uid: 用户ID
            expire: 过期时间，单位：秒
            
        Returns:
            str: 声网Token
        """
        try:
            # 示例：实际应使用声网的Token生成工具
            # from agora_token_builder import RtcTokenBuilder
            # token = RtcTokenBuilder.build_token_with_uid(
            #     settings.AGORA_APP_ID,
            #     settings.AGORA_APP_CERT,
            #     channel_name,
            #     uid,
            #     settings.AGORA_ROLE_PUBLISHER,
            #     expire
            # )
            
            # 模拟生成Token
            token = f"agora_token_{channel_name}_{uid}_{expire}"
            return token
            
        except Exception as e:
            exception(f"生成Token失败: {e}")
            return ""
    
    def get_channel_info(self, channel_name: str) -> Optional[Dict]:
        """
        获取频道信息
        
        Args:
            channel_name: 频道名称
            
        Returns:
            Optional[Dict]: 频道信息
        """
        return self.channels.get(channel_name)
    
    def get_stats(self) -> Dict:
        """
        获取声网服务统计信息
        
        Returns:
            Dict: 统计信息
        """
        return {
            "initialized": self.initialized,
            "channel_count": len(self.channels),
            "channels": list(self.channels.keys())
        }
    
    def release(self):
        """释放声网SDK资源"""
        try:
            if not self.initialized:
                return
            
            # 离开所有频道
            for channel_name in list(self.channels.keys()):
                self.leave_channel(channel_name)
            
            # 示例：实际应使用声网SDK释放资源
            # self.agora_engine.release()
            
            self.agora_engine = None
            self.initialized = False
            info("声网SDK资源已释放")
            
        except Exception as e:
            exception(f"释放声网SDK资源失败: {e}")
