import mido
import time
import sys
import listen

def new_note(x):
    return x.type == 'note_on' and x.velocity != 0

def old_note(x):
    return x.type == 'note_off'

def note_after(pos):
    if pos < 0:
        pos = 0
    for i, j in enumerate(track[pos:]):
        if new_note(j):
            return pos+i, j.note
    return 100000, None

def sine_interaction(in_, out):
    tones = []

    while True:

        slept = False

        for j in in_.iter_pending():
            if new_note(j):
                print('new', j.note)
                if j.note-60 not in tones:
                    tones.append(j.note-60)
                    listen.play_abk_tones(tones, time=0.2, cq=2**(1/10))
                    slept = True

            if old_note(j):
                print('old', j.note)
                if j.note-60 in tones:
                    tones.remove(j.note-60)
                    slept = True

        if not slept:
            time.sleep(0.01)

def open_piano():
    piano_id = 'CASIO USB-MIDI MIDI 1'

    in_ = mido.open_input(piano_id)
    out = mido.open_output(piano_id)

    for i in in_.iter_pending():  # Some kind of cleanup
        pass

    return in_, out

if __name__ == '__main__':

    in_, out = open_piano()

    sine_interaction(in_, out)