#!/usr/bin/python
import time, sys, os
#import RPi.GPIO as GPIO

SLEEP_TIME=1
LED_INC=10
TOP=80
INC_OFF=0

#GPIO.setmode(GPIO.BOARD)

class LED:
    def __init__(self, name, pin, brightness):
        self.__name = name
        self.brightness = brightness
        self.__forward = True

        # Setup port
        #GPIO.setup(pin, GPIO.OUT)
        #self.__pwm = GPIO.PWN(pin, 1000)
        #self.__pwm.start(brightness)
        self.__inc_off_count = INC_OFF


    def inc(self):
        if self.brightness == 0:

            if self.__inc_off_count == INC_OFF:
                self.__inc_off_count = 0
            else:
                self.__inc_off_count+=1
                return

        if self.__forward:
            self.brightness+=LED_INC
        else:
            self.brightness-=LED_INC

        if self.brightness > 80:
            self.__forward = False
            self.brightness-=(LED_INC * 2)
        elif self.brightness < 0:
            self.__forward = True
            self.brightness+=(LED_INC * 2)
        self.update_led()
        #self.__pwn.ChangeDutyCycle(self.brightness)

    def update_led(self):
        if self.brightness <= 20:
            sys.stdout.write("\033[0;30m")
        elif self.brightness <= 40:
             sys.stdout.write("\033[1;30m")
        elif self.brightness <= 60:
             sys.stdout.write("\033[0;37m")
        else:
            sys.stdout.write("\033[1;37m")


        sys.stdout.write("*")

        #print ("LED %s %s" % (self.__name, self.brightness))

    def reverse(self):
        self.__forward = not self.__forward


leds = [
LED("1", 1, 80),
LED("2", 2, 70),
LED("3", 1, 60),
LED("4", 1, 50),
LED("5", 1, 40),
LED("6", 1, 30),
LED("7", 1, 20),
LED("8", 1, 10),
LED("9", 1, 0)
]

while (True):
    clear = lambda: os.system('clear')
    clear()
    for led in leds:
        led.inc()

    sys.stdout.flush()
    if leds[-1].brightness == TOP or leds[0].brightness == TOP:
        for led in leds:
            led.reverse()



    time.sleep(SLEEP_TIME)