package transcoder

import (
	"fmt"
	"log"
	"os"
	"os/exec"
	"path/filepath"

	"github.com/spf13/viper"
)

func Transcode(inFile string) {
	// create ingest and archive paths
  ingestPath := filepath.Join(viper.GetString("transcoder.repository"), "ingest", inFile)
  outputPath := filepath.Join(viper.GetString("transcoder.repository"), "output", inFile)

  log.Printf("Transcoding video file %s.", ingestPath)

	cmd := exec.Command("/usr/bin/ffmpeg", 
		"-i", ingestPath, 
		"-y",
		"-f", viper.GetString("transcoder.video_format"),
    "-c:v", viper.GetString("transcoder.video_codec"),
    "-s", viper.GetString("transcoder.video_resolution"),
    "-r", viper.GetString("transcoder.video_framerate"),
    "-vf", fmt.Sprintf("format=%s", viper.GetString("transcoder.video_color")),
    "-profile:v", viper.GetString("transcoder.video_profile"),
    "-c:a", viper.GetString("transcoder.audio_codec"),
    outputPath)

  if err := cmd.Run(); err != nil {
		log.Fatalf("Error while transcoding: %s.", err)
    os.Exit(1)
	}
}