from fastapi import APIRouter, HTTPException, status
from app.core.device.manager import device_manager
from app.core.device.dispatcher import device_dispatcher
from app.schemas.at import ATCommandRequest, ATCommandResponse
from app.utils.log import get_logger

logger = get_logger(__name__)

router = APIRouter()

@router.post("/devices/{device_id}/send-at", response_model=ATCommandResponse, summary="发送AT指令")
async def send_at_command(device_id: str, at_request: ATCommandRequest):
    """向指定设备发送AT指令"""
    try:
        # 检查设备是否存在
        device = await device_manager.get_device(device_id)
        if not device:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail=f"设备 {device_id} 不存在"
            )
        
        # 检查协议是否为AT
        if device.protocol_type != 'at':
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=f"设备 {device_id} 不是AT协议，当前协议: {device.protocol_type}"
            )
        
        # 发送AT指令
        result = await device_dispatcher.execute_operation(
            device_id=device_id,
            protocol_type=device.protocol_type,
            operation="send_at_command",
            command=at_request.command,
            timeout=at_request.timeout,
            wait_response=at_request.wait_response
        )
        
        return result
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"AT指令发送失败: {device_id}, 错误: {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"AT指令发送失败: {str(e)}"
        )

@router.post("/devices/{device_id}/send-multiple-at", summary="发送多个AT指令")
async def send_multiple_at_commands(device_id: str, commands: list, delay_between: float = 1.0):
    """向指定设备发送多个AT指令"""
    try:
        # 检查设备是否存在
        device = await device_manager.get_device(device_id)
        if not device:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail=f"设备 {device_id} 不存在"
            )
        
        # 检查协议是否为AT
        if device.protocol_type != 'at':
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=f"设备 {device_id} 不是AT协议，当前协议: {device.protocol_type}"
            )
        
        # 发送多个AT指令
        result = await device_dispatcher.execute_operation(
            device_id=device_id,
            protocol_type=device.protocol_type,
            operation="send_multiple_commands",
            commands=commands,
            delay_between=delay_between
        )
        
        return {
            "device_id": device_id,
            "success": True,
            "message": f"成功发送 {len(commands)} 个AT指令",
            "results": result
        }
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"多个AT指令发送失败: {device_id}, 错误: {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"多个AT指令发送失败: {str(e)}"
        )

@router.get("/devices/{device_id}/test-at", summary="测试AT连接")
async def test_at_connection(device_id: str):
    """测试AT连接状态"""
    try:
        # 检查设备是否存在
        device = await device_manager.get_device(device_id)
        if not device:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail=f"设备 {device_id} 不存在"
            )
        
        # 检查协议是否为AT
        if device.protocol_type != 'at':
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=f"设备 {device_id} 不是AT协议，当前协议: {device.protocol_type}"
            )
        
        # 测试连接
        result = await device_dispatcher.execute_operation(
            device_id=device_id,
            protocol_type=device.protocol_type,
            operation="test_connection"
        )
        
        return {
            "device_id": device_id,
            "connected": result,
            "message": "AT连接正常" if result else "AT连接失败"
        }
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"AT连接测试失败: {device_id}, 错误: {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"AT连接测试失败: {str(e)}"
        )

@router.get("/devices/{device_id}/at-info", summary="获取AT设备信息")
async def get_at_device_info(device_id: str):
    """获取AT设备的详细信息"""
    try:
        # 检查设备是否存在
        device = await device_manager.get_device(device_id)
        if not device:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail=f"设备 {device_id} 不存在"
            )
        
        # 检查协议是否为AT
        if device.protocol_type != 'at':
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=f"设备 {device_id} 不是AT协议，当前协议: {device.protocol_type}"
            )
        
        # 获取设备信息
        result = await device_dispatcher.execute_operation(
            device_id=device_id,
            protocol_type=device.protocol_type,
            operation="get_device_info"
        )
        
        return result
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"获取AT设备信息失败: {device_id}, 错误: {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"获取AT设备信息失败: {str(e)}"
        )

@router.get("/serial/ports", summary="获取可用串口列表")
async def get_available_serial_ports():
    """获取系统中可用的串口列表"""
    try:
        from app.utils.serial_utils import SerialUtils
        ports = SerialUtils.list_available_ports()
        
        return {
            "success": True,
            "message": f"发现 {len(ports)} 个可用串口",
            "ports": ports
        }
        
    except Exception as e:
        logger.error(f"获取可用串口列表失败: {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"获取可用串口列表失败: {str(e)}"
        )