import asyncio
from typing import Dict, Optional
from interfaces.asr import ASR
from interfaces.llm import LLM
from interfaces.tts import TTS
from services.interrupt_handler import interrupt_handler


class AudioSession:
    def __init__(
        self,
        asr_service: Optional[ASR] = None,
        llm_service: Optional[LLM] = None,
        tts_service: Optional[TTS] = None,
        sample_rate: int = 16000,
    ):
        self.start_time = None
        self.end_time = None
        self.last_received_seq = -1
        self.asr_service = asr_service
        self.send_queue = None
        self.send_task = None
        self.transcript = ""
        self.last_activity_time = asyncio.get_running_loop().time()
        self.websocket = None
        self.llm_service = llm_service
        self.tts_service = tts_service
        self.device_id = None
        self.session_id = None
        self.sample_rate = sample_rate
        self.audio_queue = None

    async def set_interrupted(self, interrupted=True):
        
        if self.device_id and self.session_id:
            session_key = (self.device_id, self.session_id)
            await interrupt_handler.set_interrupt_state(session_key, interrupted)
            if hasattr(self.llm_service, "closed"):
                self.llm_service.closed = interrupted
            from utils.logger import session_logger

            session_logger.info(
                self.device_id, self.session_id, f"会话中断状态已设置为: {interrupted}"
            )
            if interrupted:
                from services.task_manager import task_manager
                await task_manager.create_task(
                    interrupt_handler.handle_interrupt(session_key),
                    device_id=self.device_id,
                    session_key=session_key,
                    task_type="interrupt"
                )

    async def register_interrupt_handlers(self):
        
        if not self.device_id or not self.session_id:
            return
        session_key = (self.device_id, self.session_id)
        if hasattr(self, "audio_queue") and self.audio_queue:
            await interrupt_handler.register_cleanup_handler(
                session_key,
                self.clear_audio_queue,
                priority=interrupt_handler.PRIORITY["QUEUE_CLEANUP"],
            )
        if hasattr(self, "send_queue") and self.send_queue:
            await interrupt_handler.register_cleanup_handler(
                session_key,
                self.clear_send_queue,
                priority=interrupt_handler.PRIORITY["QUEUE_CLEANUP"],
            )
        if self.send_task:
            await interrupt_handler.register_cleanup_handler(
                session_key,
                self.cancel_send_task,
                priority=interrupt_handler.PRIORITY["TASK_CANCELLATION"],
            )

    async def clear_audio_queue(self):
        
        try:
            if hasattr(self, "audio_queue") and self.audio_queue:
                queue_size = self.audio_queue.qsize()
                cleared_count = 0

                # 发送结束信号
                await self.audio_queue.put((None, 0))

                # 清空队列中的所有项目
                while not self.audio_queue.empty():
                    try:
                        item = await self.audio_queue.get_nowait()
                        self.audio_queue.task_done()
                        cleared_count += 1
                        # 如果是大对象，显式删除引用
                        del item
                    except asyncio.QueueEmpty:
                        break
                    except Exception:
                        pass

                from utils.logger import session_logger
                session_logger.info(
                    self.device_id, self.session_id,
                    f"音频队列已清空，原有项目数: {queue_size}，清理项目数: {cleared_count}"
                )

                # 清除队列引用
                self.audio_queue = None
        except Exception as e:
            from utils.logger import session_logger

            session_logger.error(
                self.device_id, self.session_id, f"清空音频队列时出错: {e}"
            )

    async def clear_send_queue(self):

        try:
            if hasattr(self, "send_queue") and self.send_queue:
                queue_size = self.send_queue.qsize()
                cleared_count = 0

                # 清空队列中的所有项目
                while not self.send_queue.empty():
                    try:
                        item = self.send_queue.get_nowait()
                        self.send_queue.task_done()
                        cleared_count += 1
                        # 如果是大对象，显式删除引用
                        del item
                    except asyncio.QueueEmpty:
                        break

                # 发送结束信号
                await self.send_queue.put(None)

                from utils.logger import session_logger
                session_logger.info(
                    self.device_id, self.session_id,
                    f"发送队列已清空，原有项目数: {queue_size}，清理项目数: {cleared_count}"
                )

                # 清除队列引用
                self.send_queue = None
        except Exception as e:
            from utils.logger import session_logger

            session_logger.error(
                self.device_id, self.session_id, f"清空发送队列时出错: {e}"
            )

    async def cancel_send_task(self):
        
        if self.send_task:
            self.send_task.cancel()
            try:
                await asyncio.wait_for(self.send_task, timeout=1.0)
            except (asyncio.CancelledError, asyncio.TimeoutError):
                from utils.logger import session_logger

                session_logger.info(self.device_id, self.session_id, "发送任务已取消")
            except Exception as e:
                from utils.logger import session_logger

                session_logger.error(
                    self.device_id, self.session_id, f"取消发送任务时出错: {e}"
                )
            finally:
                self.send_task = None


class AudioSessionManager:
    def __init__(self):
        self.sessions: Dict[tuple, AudioSession] = {}
        self.lock = asyncio.Lock()

    async def get_session(self, session_key):
        async with self.lock:
            return self.sessions.get(session_key)

    async def set_session(self, session_key, session):
        async with self.lock:
            self.sessions[session_key] = session

    async def remove_session(self, session_key):
        async with self.lock:
            if session_key in self.sessions:
                del self.sessions[session_key]

    async def get_all_sessions(self):
        async with self.lock:
            return list(self.sessions.items())


audio_session_manager = AudioSessionManager()