package cli

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

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

func PrintTemperatures(temperatures []*types.Temperature, cnf *config.FluckyConfig, w io.Writer) {

	sensors := []*types.Sensor{}

	// Search after sensors
	for _, temperature := range temperatures {
		found := false

		// Search for the sensor that has acquired the measured value
		for _, sensor := range cnf.Sensors {
			if sensor.SensorID == temperature.SensorID {
				sensors = append(sensors, sensor)
				found = true
				break
			}
		}

		// If it was not found, pass only the sensor with the UUID on
		if !found {
			sensor := &types.Sensor{
				SensorID: temperature.SensorID,
			}
			sensors = append(sensors, sensor)
		}
	}

	// sort temperature values for every sensor
	orderedTemperatures := make(map[string][]*types.Temperature)
	for _, temperature := range temperatures {
		orderedTemperatures[temperature.SensorID] = append(orderedTemperatures[temperature.SensorID], temperature)
	}

	// declare tabwriter
	tw := tabwriter.NewWriter(w, 0, 0, 3, ' ', 0)

	// headlines
	for i, sensor := range sensors {
		fmt.Fprintf(tw, "%v\t", sensor.Name())
		if i == len(sensors)-1 {
			fmt.Fprintf(tw, "\n")
		}
	}

	// find sensor with maximum temperature values
	maxLength := 0
	for _, orderedTemperature := range orderedTemperatures {
		if len(orderedTemperature) > maxLength {
			maxLength = len(orderedTemperature)
		}
	}

	// body
	for i := 0; i < maxLength; i++ {
		for _, sensor := range sensors {
			if len(orderedTemperatures[sensor.SensorID]) > i {
				fmt.Fprintf(tw, "%3.3f\t", orderedTemperatures[sensor.SensorID][i].TemperatureValue)
			} else {
				fmt.Fprint(tw, "\t")
			}
			fmt.Fprint(tw, "\n")
		}
	}
	tw.Flush()
}