/src/main/scala/dk/mehmedbasic/audiobook/conversion/JoiningAudioConverter.scala

package dk.mehmedbasic.audiobook.conversion

import dk.mehmedbasic.audiobook.execution._
import java.io._
import scala.Some
import dk.mehmedbasic.audiobook.io.{CountingInputStream, StreamReader}
import javazoom.jl.player.Player

/**
 * Joining audio converter. Handles n files piped to one output file.
 *
 * @author Jesenko Mehmedbasic
 *         created 09-01-13, 21:06
 *
 * @param callback Gives the file being converted, the current frame and the total frame count.
 */
class JoiningAudioConverter(
                             inputFile: AudioFile,
                             output: AudioConfig,
                             callback: (String, File) => Unit) extends Runnable {

  val system: OperatingSystem = OperatingSystem.get()
  val factory: ConversionCommandFactory = new ConversionCommandFactory(system, inputFile.getFile, output)

  val processOption: Option[Process] = createProcess

  def createProcess: Option[Process] = {
    val executor: CommandExecutor = system.getExecutor
    val process: Process = executor.execute(factory.createCommand())
    val errorStream: InputStream = process.getErrorStream
    new Thread(new StreamReader(errorStream)).start()
    Some(process)
  }

  def run() {
    if (processOption.isEmpty) {
      println(new File(".").getAbsoluteFile)
      System.err.println("An error occurred during faac execution\nCheck your $PATH for the faac executable")
      return
    }
    new StreamReader(processOption.get.getInputStream).start()

    val stream: OutputStream = new BufferedOutputStream(processOption.get.getOutputStream)
    val device: OutputStreamAudioDevice = new OutputStreamAudioDevice(stream, inputFile.getFile)

    val player: Player = new Player(new CountingInputStream(new FileInputStream(inputFile.getFile)), device)

    device.setListener(
      (fileName: String, pos: Int, len: Long) => {

      })
    player.play()

    callback.apply(inputFile.getFile.getAbsolutePath, factory.getOutput)
  }
}