import RPi.GPIO as GPIO
from mfrc522 import MFRC522
import signal
from time import sleep
from soundplayer import SoundPlayer
import os
import glob

#from interval import IntervalTimer

maxload =  50
maxtitel = 15
titelnr = 1
load = 50
titel = "/home/pi/1-43ImmergruenePartyKnueller.mp3"
p = SoundPlayer(titel, 1)

musik = {}

playlist = True
lastcheck = 0

def loadSongs():
    global maxtitel
    names = glob.glob("/home/pi/*.mp3")
    for x in names:
        p = int(x.split('-')[0].split('/')[3])
        musik[p] = x
    maxtitel = len(musik)

def showSongs():
    for i in range(len(musik)+1):
        print(i,musik.get(i))

def playSong(nr):
    global p
    global titelnr
    titelnr = nr
    titel = musik.get(titelnr)
    print("Now playing "+titel)
    p.stop()
    sleep(2)
    p = SoundPlayer(titel,1)
    p.play(1) # non-blocki   

def nextSong():
    global titelnr
    global maxtitel

    if titelnr >= maxtitel:
        titelnr = 1
    else:
        titelnr = titelnr +1
    playSong(titelnr)

def previousSong():
    global titelnr
    global maxtitel

    if titelnr <= 1:
        titelnr = maxtitel
    else:
        titelnr = titelnr -1
    playSong(titelnr)


def gibLaut():
    global lastcheck
    global playlist
    oks = p.isPlaying()
    if oks == True:
        lastcheck = 0
    else:
        if lastcheck == 0:
            lastcheck = 1
        else:
            if lastcheck == 1:
                lastcheck = 0
                if playlist == True:
                    nextSong()


#inter = IntervalTimer(2,gibLaut)

continue_reading = True

def setLoad(load):
    s = "amixer -c 1 cset numid=6 "+str(load)+ "," + str(load) + " > /home/pi/loud.txt"
    #print(s)
    os.system(s)
    f = open("/home/pi/loud.txt")
    f.readline()
    f.readline()
    s=f.readline()
    x = s.split(',')

    print(x[1])

def change_loudness():
    global load
    f =  open("/home/pi/start.txt","w")
    f.write(str(load))
    print(str(load))
    f.close()

def read_info():
    global maxload
    global load
    f = open("/home/pi/sound.txt")
    f.readline()
    s = f.readline()
    x = s.split(',')[4].split('=')
    maxload = int(x[1])
    g = open("/home/pi/start.txt")
    s = g.readline()
    load = int(s)
    print(load)
    setLoad(load)

# Capture SIGINT for cleanup when the script is aborted
def end_read(signal,frame):
    global continue_reading
    print ("Ctrl+C captured, ending read.")
    inter.stop()
    continue_reading = False
    GPIO.cleanup()

# Hook the SIGINT
signal.signal(signal.SIGINT, end_read)

# Create an object of the class MFRC522
MIFAREReader = MFRC522()

#Lauter
GPIO.setup(37, GPIO.IN)
#Leiser
GPIO.setup(36, GPIO.IN)
#Next Song
GPIO.setup(33, GPIO.IN)
#prevoius Song
GPIO.setup(35, GPIO.IN)
#set loudness
GPIO.setup(38, GPIO.IN)

# Welcome message
print("Welcome to the jfs World of Sounds")

loadSongs()
showSongs()

info1 = os.system("amixer -c 1 cget numid=6 > /home/pi/sound.txt")
read_info()

print ("Press Ctrl-C to stop.")
p.play(1)


#os.system("amixer -c 1 cset numid=6 50,50")
#inter.start()

# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:
    # other pins
    if GPIO.input(37) == 1:
            #print("+")
            if load < maxload:
                load = load +5
                setLoad(load)
    if GPIO.input(36) == 1:
            #print("-")
            if load > 0:
                load = load - 5
                setLoad(load)
    if GPIO.input(33) == 1 :
        print(">>>>>")
        nextSong()
    if GPIO.input(35) == 1 :
        print("<<<<<")
        previousSong()
    if GPIO.input(38) == 1 :
        print("set loudness")
        change_loudness()

    # Scan for cards    
    (status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
    # If a card is found
    if status == MIFAREReader.MI_OK:
        print ("Card detected")   
    # Get the UID of the card
    (status,uid) = MIFAREReader.MFRC522_Anticoll()
    # If we have the UID, continue
    if status == MIFAREReader.MI_OK:
        # Print UID
        print ("Card read UID: %s,%s,%s,%s" % (uid[0], uid[1], uid[2], uid[3]) ) 
        # This is the default key for authentication
        key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]      
        # Select the scanned tag
        MIFAREReader.MFRC522_SelectTag(uid)
        # Authenticate
        status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)
        # Check if authenticated
        if status == MIFAREReader.MI_OK:
            data = []
            text_read = ''
            #print(MIFAREReader.MFRC522_Read(8))
            block = MIFAREReader.MFRC522_Read(8) 
            if block:
            	data += block
            if data:
                text_read = ''.join(chr(i) for i in data)
            MIFAREReader.MFRC522_StopCrypto1()
            print(text_read)
            s = text_read.strip()
            i = int(s)
            print("Card No "+str(i))
            playSong(i)
        else:
            print ( "Authentication error")