import time
import board
import busio
import digitalio
from simpleio import map_range
from analogio import AnalogIn
from digitalio import DigitalInOut, Direction
import usb_midi
import adafruit_midi  # MIDI protocol encoder/decoder library
from adafruit_midi.control_change import ControlChange
from adafruit_midi.note_on import NoteOn

class Button:
    def __init__(self, name, pin, midi_io, active_function=False, deactive_function=False):
        """
        name(str): human name for the pin
        pin: pin definition 
        midi_io: control signal number to use 
        active_function = function to call when activated; calls with object, and state(active/deactive)
        deactive_function = function to call when deactivated; calls with object, and state(active/deactive)
        """

        self.name = name
        self.pin = digitalio.DigitalInOut(pin)
        self.pin.direction = digitalio.Direction.INPUT
        self.midi_io = midi_io

        self.active = False

        if active_function:
            self.on_active_function = active_function
        else:
            self.active_function = False

        if deactive_function:
            self.on_deactive_function = deactive_function
        else:
            self.on_deactive_function = False


    def poll(self):
        if self.pin.value and self.active == False:
            self.active = True
            if self.on_active_function:
                self.on_active_function(self, "activate")

        if not self.pin.value and self.active==True:
            self.active = False
            if self.on_deactive_function:
                self.on_deactive_function(self, "deactivate")


# pick your USB MIDI out channel here, 1-16
MIDI_USB_channel = 1
# pick your classic MIDI channel for sending over UART serial TX/RX
CLASSIC_MIDI_channel = 2

midi_usb = adafruit_midi.MIDI(
    midi_out=usb_midi.ports[1], out_channel=MIDI_USB_channel - 1
)

def update_button(button_object, e):
    print("button called", button_object.name,e)

    if e == "activate":
        midi_usb.send(ControlChange(button_object.midi_io, 100))

    if e == "deactivate":
        midi_usb.send(ControlChange(button_object.midi_io, 0))


button_group = [
    Button( "Button 12", board.D12, 12, update_button, update_button),
    Button( "Button 11", board.D11, 11, update_button, update_button),
    Button( "Button 10", board.D10, 10, update_button, update_button),
    Button( "Button 9", board.D9, 9, update_button, update_button)
    ]

## poll all the buttons for change
while True:
    for b in button_group:
        b.poll()
    time.sleep(0.2)