#!/bin/env python

import signal
import RPi.GPIO as GPIO
import requests
import time

print("""buttons.py - Detect which button has been pressed

This example should demonstrate how to:
1. set up RPi.GPIO to read buttons,
2. determine which button has been pressed

Press Ctrl+C to exit!

""")


# My music server URL
url = "http://192.168.0.114:6680/mopidy/rpc"
lastpress = 0


# The buttons on Pirate Audio are connected to pins 5, 6, 16 and 24
# Boards prior to 23 January 2020 used 5, 6, 16 and 20 
# try changing 24 to 20 if your Y button doesn't work.
BUTTONS = [5, 6, 16, 24]

# These correspond to buttons A, B, X and Y respectively
LABELS = ['A', 'B', 'X', 'Y']

# Set up RPi.GPIO with the "BCM" numbering scheme
GPIO.setmode(GPIO.BCM)

# Buttons connect to ground when pressed, so we should set them up
# with a "PULL UP", which weakly pulls the input signal to 3.3V.
GPIO.setup(BUTTONS, GPIO.IN, pull_up_down=GPIO.PUD_UP)


# "handle_button" will be called every time a button is pressed
# It receives one argument: the associated input pin.
def handle_button(pin):
    global lastpress
    if lastpress + 1 >= time.time():
        print("dubbel")
        return
    
    label = LABELS[BUTTONS.index(pin)]
    print("Button press detected on pin: {} label: {}".format(pin, label))
    actions = {  "A": "core.playback.resume",
                 "B": "core.playback.pause",
                 "X": "core.playback.next",
                 "Y": "core.playback.previous" }

    js1 = { "method": actions[label], "jsonrpc": "2.0", "params": {}, "id": 1 }
    js2 = requests.post(url, json=js1)
    uri = js2.json()["result"]
    print (actions[label], label, uri)
    lastpress = time.time()

# Loop through out buttons and attach the "handle_button" function to each
# We're watching the "FALLING" edge (transition from 3.3V to Ground) and
# picking a generous bouncetime of 100ms to smooth out button presses.
for pin in BUTTONS:
    GPIO.add_event_detect(pin, GPIO.FALLING, handle_button, bouncetime=100)

# Finally, since button handlers don't require a "while True" loop,
# we pause the script to prevent it exiting immediately.
signal.pause()