package logs

import (
	"bufio"
	"fmt"
	"os"
	"path/filepath"

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

// Temperature write a given array of temperatures to a logfile
func Temperature(temperatures []*stypes.Temperature, config *types.Config) error {

	logPath := filepath.Dir(config.TemperatureLogfile)

	// create log dir if not exist
	if _, err := os.Stat(logPath); os.IsNotExist(err) {
		err := os.MkdirAll(logPath, os.ModePerm)
		if err != nil {
			return fmt.Errorf("Can not create directory: %v", err)
		}
	}

	f, err := os.OpenFile(config.TemperatureLogfile, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer f.Close()

	w := bufio.NewWriter(f)

	for _, temperature := range temperatures {
		fmt.Fprintf(w, "%v\t%v\t%v\t%v\n", temperature.TemperatureID, temperature.TemperatureValue, temperature.TemperatureDate, temperature.SensorID)
	}

	err = w.Flush()
	if err != nil {
		return fmt.Errorf("Can not flush writer: %v", err)
	}

	return nil
}