import time
from pigpio_encoder.rotary import Rotary

# Bands dict
bands = {
	"80m":[3.5, 4],
	"40m":[7, 7.3],
	"20m":[14, 14.35],
	"10m":[28, 29.7],
	"2m":[144,146],
	"70cm":[430,440]
}

# iterate over band
band = iter(bands)
CURRENT_BAND = None

def setup_encoder(ranges:list, scale:float=.25):
	# make the minimum and maximum deviate by .1
	minimum, maximum = ranges
	minimum -= .1
	maximum += .1
	
	# prints current value
	def rotary_callback(counter):
		print("Counter value: ", round(counter, 2))


	# init rotary
	my_rotary = Rotary(
		clk_gpio=17,
		dt_gpio=27,
		sw_gpio=22
	)

	# setup rotary
	my_rotary.setup_rotary(
		min=minimum,
		max=maximum,
		scale=scale,
		debounce=300,
		rotary_callback=rotary_callback
	)

	#my_rotary.watch()
	return my_rotary

def change_band(plus:bool=False, minus:bool=False):
	global CURRENT_BAND
	if plus:
		# rollover positive next
		CURRENT_BAND = next(band)
	if minus:
		try:
			# rollover negative previous
			bands_keys = list(bands)
			CURRENT_BAND = bands[bands_keys[bands_keys.index(CURRENT_BAND)-1]]
			print(CURRENT_BAND)
		except IndexError:
			pass

	# new encoder
	encoder = setup_encoder(bands[CURRENT_BAND])
	print(CURRENT_BAND)
	
	return encoder

def main():
	encoder = change_band(plus=True)
	while True:
		if encoder.counter > bands[CURRENT_BAND][1]:
			encoder = change_band(plus=True)
		if encoder.counter < bands[CURRENT_BAND][0]:
			encoder = change_band(minus=True)
		time.sleep(.5)

if __name__ == "__main__":
	main()