#!/usr/bin/python3
# -*- coding: utf-8 -*-
# -*- mode: Python -*-

'''

Physical buttons handler for Nerves v0.1b

Func button : GPIO 23 (->pin 16) / ground pin 14
Down button : GPIO 24 (->pin 18) / ground 20

When button is pressed : button.value -> False


'''   

from time import sleep
import board
import digitalio
import leds
 
crtfunc = 0
funcs = [0,1,2]

debug = 0

print("Loading Nerves buttons handler v0.1b")
 
funcbutton = digitalio.DigitalInOut(board.D23)
funcbutton.direction = digitalio.Direction.INPUT
funcbutton.pull = digitalio.Pull.UP

funcstate = True

downbutton = digitalio.DigitalInOut(board.D24)
downbutton.direction = digitalio.Direction.INPUT
downbutton.pull = digitalio.Pull.UP

def runforever():
    global crtfunc, funcstate

    while True:

        #print(funcbutton.value, funcstate, crtfunc, downbutton.value)
        #print(funcbutton.value, funcstate)

        if not funcbutton.value: 

            if  debug > 0:
                print("func button pressed : ", funcbutton.value, funcstate )
            
            sleep(0.2)

        # Launch on button release
        if funcbutton.value and funcstate == False :

            crtfunc +=1
            if crtfunc == len(funcs):
                crtfunc = 0
            print('Launch func', crtfunc)
            if crtfunc == 0:
                leds.mode = 0
            if crtfunc == 1:
                leds.mode = 1

            sleep(0.2)

        funcstate = funcbutton.value

        if not downbutton.value: 
            if  debug > 0:
                print("down button pressed")
    
            import os
            print('will shutdown...')
            leds.mode = -1
            leds.cls()
            os.system("systemctl poweroff")
    
        sleep(0.005)


if __name__ == '__main__':
    
    runforever()