package ffmpeg

import (
	"fmt"
	"os"
	"os/exec"
	"strconv"
)

const (
	FFPROBE = "/usr/bin/ffprobe"
)

// Remove executes mega-rm src
func Duration(fn string) (duration float64, err error) {
	// ffprobe -i "KatyDid's Channel, The JACK Show Reads Graham Nolans Chuck Dixon Tweet.mp3" -show_entries format=duration -v quiet -of csv="p=0"
	//"\"" + fn + "\"",
	args := []string{
		"-i",
		`""` + fn + `""`,
		"-show_entries",
		"format=duration",
		"-v",
		"quiet",
		"-of",
		"csv=\"p=0\"",
	}
	fmt.Println("[ffmpeg]", FFPROBE, args)
	//_duration, err := exec.Command(FFPROBE, args...).Output()
	cmd := exec.Command(FFPROBE, args...)
	cmd.Stderr = os.Stderr
	data, err := cmd.Output()
	if err != nil {
		fmt.Println("[ffmpeg] error[0]:", err)
		fmt.Println(data)
		return 0, err
	}

	duration, err = strconv.ParseFloat(string(data), 64)
	if err != nil {
		fmt.Println("[ffmpeg] error[1]:", err)
		return 0, err
	}

	return
}