import json
import time
import asyncio
from fastapi import WebSocket
from handlers.audio_packet_parser import parse_packet
from handlers.audio_session_handler import handle_websocket_data
from services.audio_session import audio_session_manager
from services.interrupt_handler import interrupt_handler
from services.task_manager import task_manager
from utils.logger import session_logger
from handlers.prompt_sound_handler import handle_prompt_sound_request
from handlers.session_cleanup_handler import handle_old_session_cleanup

async def handle_websocket_messages(websocket: WebSocket, device_id: str):
    """
    处理WebSocket连接中的所有消息
    
    Args:
        websocket: WebSocket连接
        device_id: 设备ID
    """
    current_active_session = None
    first_audio_received_time = None
    
    while True:
        message = await websocket.receive()
        
        if not websocket.client_state.name == "CONNECTED":
            session_logger.info(
                device_id,
                "connection",
                "WebSocket连接已关闭，退出消息循环",
            )
            break
            
        if message["type"] == "websocket.receive":
            data = message["text"] if "text" in message else message["bytes"]
            
            if isinstance(data, str):
                await handle_text_message(websocket, device_id, data)
            else:  # 处理二进制音频数据
                current_active_session, first_audio_received_time = await handle_binary_message(
                    websocket, 
                    device_id, 
                    data, 
                    current_active_session,
                    first_audio_received_time
                )
        elif message["type"] == "websocket.disconnect":
            break


async def handle_text_message(websocket: WebSocket, device_id: str, text_data: str):
    """处理文本消息"""
    if text_data.startswith("REQUEST_PROMPT_SOUND:"):
        prompt_type = text_data.split(":", 1)[1]
        if device_id:
            await handle_prompt_sound_request(device_id, prompt_type)
    elif text_data == "NETWORK_RESET_ACKNOWLEDGED":
        session_logger.info(device_id, "network", f"设备 {device_id} 确认网络重置")
    elif text_data.startswith("FIRMWARE_UPDATE_STATUS:"):
        status_info = text_data.split(":", 1)[1]
        parts = status_info.split(",")
        status_dict = {}
        for part in parts:
            if "=" in part:
                key, value = part.split("=", 1)
                status_dict[key.strip()] = value.strip()
        
        from services.device_update_manager import device_firmware_update_manager
        
        update_status = status_dict.get("status", "updating")
        progress = float(status_dict.get("progress", "0")) if "progress" in status_dict else 0.0
        
        await device_firmware_update_manager.update_firmware_progress(device_id, progress)
        
        if update_status in ["success", "failed", "completed"]:
            version = status_dict.get("version", "unknown")
            await device_firmware_update_manager.update_firmware_update(
                device_id,
                firmware_version=version,
                update_status=update_status
            )
        
        session_logger.info(device_id, "update", f"固件更新状态已保存: {update_status}, 进度: {progress}")
    elif text_data.startswith("FIRMWARE_VERSION:"):
        version_info = text_data.split(":", 1)[1].strip()
        session_logger.info(device_id, "update", f"收到设备固件版本: {version_info}")
        from services.device_update_manager import device_firmware_update_manager
        await device_firmware_update_manager.update_device_firmware_version(
            device_id,
            version_info
        )
        await device_firmware_update_manager.update_firmware_update(
            device_id,
            version_info,
            "success"  # 收到版本信息说明设备当前状态正常
        )


async def handle_binary_message(websocket: WebSocket, device_id: str, binary_data, current_active_session, first_audio_received_time):
    """处理二进制音频消息"""
    session_key, session, packet_type, audio_data, sample_rate = await parse_packet(binary_data, websocket)
    
    if session:
        session.websocket = websocket
        session_id = session_key[1]
        
        if packet_type == 1:  # 开始包
            current_active_session = await handle_start_packet(
                device_id, session_id, session_key, session, current_active_session
            )
        elif packet_type == 3:  # 中断包
            current_active_session = await handle_interrupt_packet(
                device_id, session_id, session_key, session, current_active_session
            )
        elif packet_type == 2:  # 结束包
            if current_active_session == session_key:
                current_active_session = None
        elif packet_type == 0 and first_audio_received_time is None:
            first_audio_received_time = time.perf_counter()
            session.start_time = first_audio_received_time
            session_logger.info(
                device_id, session_id, f"收到第一个音频数据包时间: {first_audio_received_time}"
            )
        
        await handle_websocket_data(websocket, session_key, session, packet_type, audio_data, sample_rate)
    
    return current_active_session, first_audio_received_time


async def handle_start_packet(device_id, session_id, session_key, session, current_active_session):
    """处理会话开始包"""
    if current_active_session and current_active_session[1] != session_id:
        old_session = await audio_session_manager.get_session(current_active_session)
        if old_session:
            session_logger.info(
                device_id,
                current_active_session[1],
                f"检测到新会话 {session_id}，优先中断旧会话 {current_active_session[1]}",
            )
            await interrupt_handler.set_interrupt_state(current_active_session, True)
            if hasattr(old_session.llm_service, "close"):
                await old_session.llm_service.close()
            if hasattr(old_session.tts_service, "close"):
                await old_session.tts_service.close()
            await task_manager.create_task(
                handle_old_session_cleanup(old_session, current_active_session),
                device_id=device_id,
                session_key=current_active_session,
                task_type="cleanup"
            )
    
    current_active_session = session_key
    await interrupt_handler.set_interrupt_state(session_key, False)
    if hasattr(session.llm_service, "closed"):
        session.llm_service.closed = False
    session_logger.info(device_id, session_id, f"设置当前活跃会话: {session_id}")
    await interrupt_handler.register_session(session_key)
    
    return current_active_session


async def handle_interrupt_packet(device_id, session_id, session_key, session, current_active_session):
    """处理中断包"""
    if current_active_session == session_key:
        current_active_session = None
        session_logger.info(device_id, session_id, "收到中断包，立即设置中断状态")
        await interrupt_handler.set_interrupt_state(session_key, True)
        if hasattr(session.llm_service, "closed"):
            session.llm_service.closed = True
        if interrupt_handler.is_processing_interrupt(session_key):
            session_logger.info(device_id, session_id, "检测到连续中断，中断请求将被排队")
        await task_manager.create_task(
            interrupt_handler.handle_interrupt(session_key),
            device_id=device_id,
            session_key=session_key,
            task_type="interrupt"
        )
    return current_active_session