import time

# Import SPI library (for hardware SPI) and MCP3008 library.
import Adafruit_GPIO.SPI as SPI
import Adafruit_MCP3008
import fluidsynth

fs = fluidsynth.Synth()
fs.start(driver="alsa")
sfid0 = fs.sfload("Audio - Sound Font - Sonic Implants Session Drums.sf2")
fs.program_select(0, sfid0, 0, 0)

# Hardware SPI configuration:
SPI_PORT   = 0
SPI_DEVICE = 0
mcp = Adafruit_MCP3008.MCP3008(spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE))

# channel state and settings
MIDI_NOTES = [48, 38, 51, 50, 55, 49, 50, 51];
NUMBER_OF_CHANNELS = 6
MILLIS_BETWEEN_PICKS_AND_OFF = 50
MILLIS_BETWEEN_TWO_OF_THE_SAME_NOTE = 10

channel_state = [0]*NUMBER_OF_CHANNELS
channel_pick  = [0]*NUMBER_OF_CHANNELS
channel_pick_time = [0]*NUMBER_OF_CHANNELS
channel_thrushhold = [30, 30, 30, 20, 60, 30, 30, 30]
channel_state_millis = [0]*NUMBER_OF_CHANNELS

#millis = int(round(time.time() * 1000))
# Main program loop.
while True:
    # Read all the ADC channel values in a list.
    values = [0]*NUMBER_OF_CHANNELS
    for i in range(NUMBER_OF_CHANNELS):
        # The read_adc function will get the value of the specified channel (0-7).
        values[i] = mcp.read_adc(i)
	#Stat 0 - IDLE
	if channel_state[i] == 0:
		#if we cross the threshhold
		if values[i] > channel_thrushhold[i] and channel_state_millis[i] + MILLIS_BETWEEN_TWO_OF_THE_SAME_NOTE <= int(round(time.time() * 1000)) :
			#set state to 1
			channel_state[i] = 1
			channel_state_millis[i] = int(round(time.time() * 1000))
	elif channel_state[i] == 1:
		# while till we over the pick
		if channel_pick[i] < values[i]:
			#play note
			fs.noteon(0, MIDI_NOTES[i] , 127)
			#set state to 2
			channel_state[i] = 2
			channel_state_millis[i] = int(round(time.time() * 1000))
		else:
			# save last pick
			channel_pick[i] = values[i]
	elif  channel_state[i] == 2:
		#if the note is playing for long enough
		if channel_state_millis[i] + MILLIS_BETWEEN_PICKS_AND_OFF <= int(round(time.time() * 1000)): 
			#note off
			fs.noteoff(0, MIDI_NOTES[i])
			#clear the pick
			channel_pick[i] = 0
			#set state back to IDLE
			channel_state[i] = 0
			channel_state_millis[i] = int(round(time.time() * 1000))