package temperature

import (
	"fmt"
	"time"

	"github.com/volker-raschek/flucky/pkg/config"
	"github.com/volker-raschek/flucky/pkg/types"
)

// GetSensorsByTemperatures returns commulated list of sensors by temperature values
func GetSensorsByTemperatures(temperatures []*types.Temperature, cnf *config.Configuration) []*types.Sensor {
	sensors := []*types.Sensor{}
	for _, temperature := range temperatures {
		duplicated := false
		foundSensor := &types.Sensor{}
		for _, cnfSensor := range cnf.Sensors {
			if temperature.SensorID == cnfSensor.SensorID {
				foundSensor = cnfSensor

				// compare if id has already been added to list
				for _, sensor := range sensors {
					if cnfSensor.SensorID == sensor.SensorID {
						duplicated = true
						break
					}
				}
			}
		}
		if duplicated {
			continue
		}
		if foundSensor != nil {
			sensors = append(sensors, foundSensor)
			continue
		} else {
			sensors = append(sensors, &types.Sensor{SensorID: temperature.SensorID})
		}
	}
	return sensors
}

// GetTemperaturesBetweenTimeRange returns a list of temperatures between a given time range
func GetTemperaturesBetweenTimeRange(from time.Time, till *time.Time, temperatures []*types.Temperature) ([]*types.Temperature, error) {

	if till != nil && from.After(*till) {
		fFormat := from.Format("2006-01-02 15:04:05")
		tFormat := till.Format("2006-01-02 15:04:05")
		return nil, fmt.Errorf("%v is after %v", fFormat, tFormat)
	}

	cachedTemperatures := []*types.Temperature{}
	for _, temperature := range temperatures {

		if till == nil && temperature.TemperatureDate.After(from) {
			cachedTemperatures = append(cachedTemperatures, temperature)
			continue
		}

		if temperature.TemperatureDate.After(from) && temperature.TemperatureDate.Before(*till) {
			cachedTemperatures = append(cachedTemperatures, temperature)
		}
	}
	return cachedTemperatures, nil
}

// GetTemperaturesBySensors returns a list of temperatures given by the sensor id.
// If the sensor name, wire-id or id can not found in configured sensors, it would be skiped!
func GetTemperaturesBySensors(sensorNamesOrIDs []string, temperatures []*types.Temperature, cnf *config.Configuration) []*types.Temperature {
	cachedSensors := []*types.Sensor{}
	cachedTemperatures := []*types.Temperature{}

	// match sensor name, wire-id or sensor id with configured sensors
	// and append the matched sensor to the list
	for _, sensor := range sensorNamesOrIDs {
		for _, cs := range cnf.Sensors {
			if cs.SensorID == sensor {
				cachedSensors = append(cachedSensors, cs)
			}
			if cs.WireID != nil && *cs.WireID == sensor {
				cachedSensors = append(cachedSensors, cs)
			}
			if cs.SensorName == sensor {
				cachedSensors = append(cachedSensors, cs)
			}
		}
	}

	// march all temperatures which matched with the sensor id
	for _, temperature := range temperatures {
		for _, cachedSensor := range cachedSensors {
			if temperature.SensorID == cachedSensor.SensorID {
				cachedTemperatures = append(cachedTemperatures, temperature)
			}
		}
	}

	return cachedTemperatures
}