import datetime
import sched, time
import math
import unicornhat as uh
uh.set_layout(uh.PHAT)
uh.brightness(0.5)


#################################################################################################
#Kelvin to RGB


def convert_K_to_RGB(colour_temperature):
    """
    Converts from K to RGB, algorithm courtesy of
    http://www.tannerhelland.com/4435/convert-temperature-rgb-algorithm-code/
    """
    #range check
    if colour_temperature == 0:
        return [0, 0, 0]

    tmp_internal = colour_temperature / 100.0

    # red
    if tmp_internal <= 66:
        red = 255
    else:
        tmp_red = 329.698727446 * math.pow(tmp_internal - 60, -0.1332047592)
        if tmp_red < 0:
            red = 0
        elif tmp_red > 255:
            red = 255
        else:
            red = tmp_red

    # green
    if tmp_internal <=66:
        tmp_green = 99.4708025861 * math.log(tmp_internal) - 161.1195681661
        if tmp_green < 0:
            green = 0
        elif tmp_green > 255:
            green = 255
        else:
            green = tmp_green
    else:
        tmp_green = 288.1221695283 * math.pow(tmp_internal - 60, -0.0755148492)
        if tmp_green < 0:
            green = 0
        elif tmp_green > 255:
            green = 255
        else:
            green = tmp_green

    # blue
    if tmp_internal >=66:
        blue = 255
    elif tmp_internal <= 19:
        blue = 0
    else:
        tmp_blue = 138.5177312231 * math.log(tmp_internal - 10) - 305.0447927307
        if tmp_blue < 0:
            blue = 0
        elif tmp_blue > 255:
            blue = 255
        else:
            blue = tmp_blue

    return red, green, blue

#################################################################################################
#My script


kelvinmax = 6000
keltemp = 0
rgbval = [0, 0, 0]
def numinc():
    global kelvinmax
    global keltemp
    global rgbval
    currentDT = datetime.datetime.now()
    htime = int(currentDT.strftime("%H"))#Time in hours
    mtime = int(currentDT.strftime("%M"))#Time in minutes
    mintime = htime*60+mtime#Total current time in minutes(converted the hours to minutes)
    print(htime, mtime, mintime, mintime>=1080 and mintime<1320)
    if(mintime>=1080 and mintime<1320):#If the time is between 6 and 10pm set the keltemp.
        intime = mintime - 1080
        percentday = intime/240#% of the day that has passed.
        keltemp = kelvinmax - kelvinmax*percentday
    else:#If the time is not in the range of 6-10pm turn off the LEDs.
        keltemp = 0
    rgbval = convert_K_to_RGB(keltemp)
    #print(keltemp, convert_K_to_RGB(keltemp))
    setLED()

def setLED():
    global kelvinmax
    global keltemp
    global rgbval
    if(keltemp == 0):#Turn off LEDs
        uh.clear()
        uh.show()
    else:
        for x in range(8):
            for y in range(4):
                uh.set_pixel(x, y, int(rgbval[0]), int(rgbval[1]), int(rgbval[2]))
        uh.show()


numinc()
s = sched.scheduler(time.time, time.sleep)
def do_something(sc):
    print("Updating LED color.")
    numinc()
    s.enter(60, 1, do_something, (sc,))

s.enter(60, 1, do_something, (s,))
s.run()