#!/usr/bin/python3

import subprocess, signal
import sys, os, time

# Display Message
def display_usage():
    print("Usage: ./jackStart COMMAND [--start|--stop] OUTPUT [MID|DSP24] ")

def display_missing_device():
    print("Missing Device: [MID | DSP24]")

def display_missing_cmd():
    print("Missing Command: --start | --stop")


# Check if all commandline args are present
if(len(sys.argv) == 1):
    display_usage()
    quit()
#elif (len(sys.argv) < 3 ):
#    display_missing_device()
 #   quit()

# Start server
sink = 0
source = 0
def start_server():

    playback = "jackd -R -d alsa -d hw:" + sys.argv[2] + " -C hw:DSP24 -P hw:" +sys.argv[2]
#    os.system(mod1)
   # os.system("/usr/bin/pactl load-module module-jack-source channels=2")
    os.system(playback)
    print("Server started")
# Stop server
pass_arg=['list', '|','grep -B 1 "Name: module-jack-source"']

def stop_server():
#    subprocess.run(['pactl'] + pass_arg)
    subprocess.check_output(['pactl'] + pass_arg,executable ='/bin/bash')
#    print(pass_args)
   # cmd ='pactl list | grep -B 1 "Name: module_jack_sink" | grep "Module"'
   # sink = subprocess.call(['pactl list | grep -B 1 "Name: module-jack-sink" | grep Module | sed "'"s/[^0-9]//g"'"'])
   # source = os.system("pactl list | grep -B 1 "Name: module-jack-source" | grep Module | sed 's/[^0-9]//g'")

    #os.system("pkill jackd")
    #os.system("pactl unload-module module-jack-sink")
    #os.system("pactl unload-module module-jack-source")

# Run or stop server
if(sys.argv[1] == None):
    quit()
if(sys.argv[1] == "--stop"):
    stop_server()
elif(sys.argv[1] == "--start"):
    start_server()