// +build pi0

package main

import (
	"log"
	"os/exec"
	"time"
)

const audioCmd = "play"

func initCommand() {
	const soundcardPath = "/usr/share/doc/audioInjector/asound.state.RCA.thru.test"
	const sleepDur = 1 * time.Second

	// alsactl is a command that ensures the sound will be played through the correct soundcard.
	path, err := exec.LookPath("alsactl")
	if err != nil {
		log.Fatalf("fatal: didn't find 'alsactl' executable\n")
	}
	log.Printf("debug: 'alsactl' executable is in '%s'\n", path)

	for {
		cmdInit := exec.Command("alsactl", "-f", soundcardPath, "restore")
		err := cmdInit.Run()
		if err == nil {
			break
		}
		log.Printf("fatal(ish): cmd.Run() for 'alsactl' failed with '%s'\n", err)
		time.Sleep(sleepDur)
	}

	// Making sure that play command is on the pi.
	path, err = exec.LookPath(audioCmd)
	if err != nil {
		log.Fatalf("fatal: didn't find 'play' executable\n")
	}
	log.Printf("debug: 'play' executable is in '%s'\n", path)
}