package temperature

import (
	"fmt"
	"io"
	"text/tabwriter"
	"time"

	"git.cryptic.systems/fh-trier/go-flucky/pkg/httpcall"

	stypes "git.cryptic.systems/fh-trier/go-flucky-server/pkg/types"
	"git.cryptic.systems/fh-trier/go-flucky/pkg/logs"

	"git.cryptic.systems/fh-trier/go-flucky/pkg/config"

	uuid "github.com/satori/go.uuid"
	"github.com/yryz/ds18b20"
)

var temperatureLog = "temperature.log"

func Get(argSensorNames []string, writeLogfiles, push bool, configDir string, w io.Writer) error {

	// get cnf
	cnf, err := config.Read(configDir)
	if err != nil {
		return err
	}

	tw := tabwriter.NewWriter(w, 0, 0, 5, ' ', 0)

	var sensorNames []string

	// headlines
	if len(argSensorNames) > 1 {
		for _, argSensorName := range argSensorNames {
			if len(argSensorNames) > 1 {
				fmt.Fprintf(tw, "%v\t", argSensorName)
			}
			sensorNames = append(sensorNames, argSensorName)
		}
		fmt.Fprint(tw, "\n")
	} else {
		numOfSensors := len(cnf.Sensors)

		for _, sensor := range cnf.Sensors {
			switch {
			case sensor.SensorName != nil && numOfSensors <= 1:
				sensorNames = append(sensorNames, *sensor.SensorName)
			case sensor.SensorName == nil && numOfSensors <= 1:
				sensorNames = append(sensorNames, sensor.SensorID)
			case sensor.SensorName != nil && numOfSensors > 1:
				fmt.Fprintf(tw, "%v\t", *sensor.SensorName)
				sensorNames = append(sensorNames, *sensor.SensorName)
				break
			case sensor.SensorName == nil && numOfSensors > 1:
				sensorNames = append(sensorNames, sensor.SensorID)
				fmt.Fprintf(tw, "%v\t", sensor.SensorID)
				break
			}
		}

		if numOfSensors > 1 {
			fmt.Fprint(tw, "\n")
		}
	}

	temperatures, err := getTemperatures(sensorNames, configDir)
	if err != nil {
		return err
	}

	for _, temperature := range temperatures {
		fmt.Fprintf(tw, "%v\t", temperature.TemperatureValue)
	}

	fmt.Fprint(tw, "\n")

	tw.Flush()

	if writeLogfiles {
		if err := logs.Temperature(temperatures, cnf); err != nil {
			return err
		}
	}

	if push {
		if err := httpcall.SendTemperatures(temperatures, configDir); err != nil {
			return err
		}
	}

	return nil

}

func GetFollow(sensorNames []string, writeLogfiles, push bool, configDir string, w io.Writer) error {

	// // get cnf
	// cnf, err := config.Read(configDir)
	// if err != nil {
	// 	return err
	// }

	// var temperatures []*stypes.Temperature

	// // tabwriter
	// tw := tabwriter.NewWriter(w, 0, 0, 5, ' ', 0)

	// // headlines
	// var sensorNames []string
	// cnt := len(cnf.TemperatureSensors)
	// for _, sensor := range cnf.TemperatureSensors {

	// 	switch {
	// 	case sensor.Name == "" && cnt == 1:
	// 		sensorNames = append(sensorNames, sensor.ID)
	// 		break

	// 	case sensor.Name != "" && cnt == 1:
	// 		sensorNames = append(sensorNames, sensor.Name)
	// 		break

	// 	case sensor.Name == "" && cnt > 1:
	// 		sensorNames = append(sensorNames, sensor.ID)
	// 		fmt.Fprintf(tw, "%v\t", sensor.ID)
	// 		break

	// 	case sensor.Name != "" && cnt > 1:
	// 		sensorNames = append(sensorNames, sensor.Name)
	// 		fmt.Fprintf(tw, "%v\t", sensor.Name)
	// 		break

	// 	}
	// }

	// if cnt > 1 {
	// 	fmt.Fprint(tw, "\n")
	// }

	// // body
	// ticker := time.NewTicker(1 * time.Second)

	// go func() {
	// 	for {
	// 		select {
	// 		case _, more := <-ticker.C:
	// 			if !more {
	// 				return
	// 			}

	// 			// get temperatures from sensors and write them into writer
	// 			temperatures, err = getTemperatures(sensorNames, configDir)
	// 			for _, temperature := range temperatures {
	// 				fmt.Fprintf(tw, "%v\t", temperature.TemperatureValue)
	// 			}

	// 			fmt.Fprint(tw, "\n")

	// 			// flush writer
	// 			tw.Flush()

	// 		}
	// 	}
	// }()

	// signalChannel := make(chan os.Signal)
	// signal.Notify(signalChannel, syscall.SIGINT, syscall.SIGTERM)

	// sig := <-signalChannel
	// fmt.Printf("Got signal %s, initiating shutdown\n", sig)
	// ticker.Stop()

	// // write logfiles
	// if writeLogfiles {
	// 	if err := logs.Temperature(temperatures, cnf); err != nil {
	// 		return err
	// 	}
	// }

	return nil
}

func Push(sensorName, configDir string) error {

	// var temperatures []*stypes.Temperature

	// temperature, err := getTemperature(sensorName, configDir)
	// if err != nil {
	// 	return err
	// }

	// temperatures = append(temperatures, &temperature)

	// if err := httpcall.SendTemperatures(temperatures, configDir); err != nil {
	// 	return err
	// }

	return nil

}

func getTemperatures(sensorNames []string, configDir string) ([]*stypes.Temperature, error) {

	temperatures := []*stypes.Temperature{}

	// read cnf
	cnf, err := config.Read(configDir)
	if err != nil {
		return []*stypes.Temperature{}, err
	}

	// search after sensor
	var foundSensors []*stypes.Sensor
	var sensorFound bool
	for _, configSensor := range cnf.Sensors {
		for _, sensorName := range sensorNames {
			if configSensor.SensorID == sensorName || *configSensor.SensorName == sensorName {
				foundSensors = append(foundSensors, configSensor)
				sensorFound = true
			}
		}
	}

	if !sensorFound {
		return []*stypes.Temperature{}, fmt.Errorf("Sensor not found any sensor in the list")
	}

	for _, foundSensor := range foundSensors {
		t, err := ds18b20.Temperature(*foundSensor.WireID)
		if err != nil {
			return []*stypes.Temperature{}, fmt.Errorf("Can not read temperature from sensor %v: %v", foundSensor.SensorID, err)
		}

		temperature := &stypes.Temperature{
			TemperatureID:    uuid.NewV4().String(),
			TemperatureValue: t,
			SensorID:         foundSensor.SensorID,
			TemperatureDate:  time.Now(),
		}

		temperatures = append(temperatures, temperature)
	}

	return temperatures, nil
}