package sensor

import (
	"fmt"
	"time"

	uuid "github.com/satori/go.uuid"
	"github.com/volker-raschek/flucky/pkg/types"
	"github.com/yryz/ds18b20"
)

// DS18B20 is a sensor to measure humidity and temperature.
type DS18B20 struct {
	*types.Sensor
}

// GetSensorModel returns the sensor model
func (s *DS18B20) GetSensorModel() types.SensorModel {
	return s.Sensor.SensorModel
}

// GetSensor return the sensor struct
func (s *DS18B20) GetSensor() *types.Sensor {
	return s.Sensor
}

// ReadTemperature measure the temperature
func (s *DS18B20) ReadTemperature() (*types.Temperature, error) {

	t, err := ds18b20.Temperature(*s.WireID)
	if err != nil {
		return nil, fmt.Errorf("Can not read from Sensor %v (UUID: %v, Wire-ID: %v): %v", s.SensorName, s.SensorID, s.WireID, err)
	}

	temperature := &types.Temperature{
		TemperatureID:       uuid.NewV4().String(),
		TemperatureValue:    t,
		TemperatureFromDate: time.Now(),
		TemperatureTillDate: time.Now(),
		SensorID:            s.SensorID,
	}

	return temperature, nil

}