from pirc522 import RFID
from glob import glob

import atexit
import os
import time
import signal
import subprocess
import vlc

rdr = RFID()
util = rdr.util()

last_seen = None
seen_at = 0
p = None

RETRY_TIME = 2

#player = subprocess.Popen(["mpg321", "-R", "-"], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
player = subprocess.Popen(["mpg321", "-R", "-"], stdin=subprocess.PIPE)
player.stdin.write("GAIN 100")

try:
  while True:
    (error, tag_type) = rdr.request()
    if not error:
      (error, uid) = rdr.anticoll()
      if not error:
        tag_id = ''.join(hex(x)[2:].zfill(2) for x in uid)
        print("Tag: " + tag_id)

        if tag_id == 'b9506555d9':
          print("Stopping playback.")
          player.stdin.write("STOP\n")
          continue

        if time.time() > (seen_at + RETRY_TIME):
          last_seen = uid
          seen_at = time.time()

          if tag_id == 'aa89665510':
            print("Toggling pause.")
            player.stdin.write("PAUSE\n")
            continue

          file = glob("media/" + tag_id + " - *.mp3")
          if file:
            print("Playing file " + file[0])
            player.stdin.write("STOP\n")
            player.stdin.write("LOAD " + file[0] + "\n")

          continue
except (KeyboardInterrupt, SystemExit):
  os.kill(player.pid, signal.SIGTERM)

# Calls GPIO cleanup
rdr.cleanup()