# sensors/views.py

from django.http import JsonResponse

from .models import Sensor


def get_sensor_data(request, area_code, parameter_type):
    try:
        sensors = Sensor.objects.filter(area_code=area_code)
        if not sensors.exists():
            return JsonResponse({'error': 'No sensors found for this area code'}, status=404)

        data_list = []
        for sensor in sensors:
            # 获取该传感器最新的指定参数的数据
            data = sensor.data.filter(parameter_type=parameter_type).order_by('-timestamp').first()
            if data:
                data_list.append({
                    'sensor_uuid': str(sensor.uuid),
                    'value': float(data.value),
                    'timestamp': data.timestamp.isoformat()
                })

        if not data_list:
            return JsonResponse({'error': f'No {parameter_type} data available for this area'}, status=404)

        response = {
            'area_code': area_code,
            'parameter_type': parameter_type,
            'sensors': data_list
        }

        return JsonResponse(response)
    except Exception as e:
        return JsonResponse({'error': str(e)}, status=500)