light

from datetime import time as Time, datetime, timedelta
from time import time, sleep
from gpiozero import LED
from multiprocessing import Process
from functools import partial
from tkinter.ttk import Combobox
from tkinter import Tk, Label, Button, Frame

hrs = [('0' + str(hr))[-2:] for hr in range(25)]
mins = [('0' + str(min_))[-2:] for min_ in range(60)]
procs = []
growlight = LED(17)

def light_on():
    """ every 1 minute, checks if it is time for the light to be on or off """
    while True:
        now = datetime.now()
        now = (now.hour, now.minute)
        start = (int(hr_cb.get()), int(min_cb.get()))
        hrs = int(len_cb.get())
        stop = (start[0] + hrs, start[1])

        with open('/home/pi/code/python/log.txt','a') as af: # debug
            # debug
            af.write(f'start: {start}\n')
            af.write(f'now:   {now}\n')
            af.write(f'stop:  {stop}\n')
            af.write(f'hrs: {hrs}\n')
            af.write(f'before logic: {growlight}\n')

            if  start <= now < stop:
                if not growlight.is_active:
                    growlight.on()
                    af.write('!on signal sent\n') # debug
                else:
                    af.write('light was already on, and should be.\n')
            elif growlight.is_active:
                growlight.off()
                af.write('!off signal sent\n') # debug
            else:
                af.write('light was already off, and should be.\n')

            af.write(f'after logic: {growlight}\n\n')

            af.close() # debug

        sleep(59)

def light_timer():
    global timer
    global procs
    if len(procs) > 0:
        for proc in procs:
            proc.terminate()
    timer = Process(target=light_on)
    procs.append(timer)
    timer.start()

def cleanup_kill():
    global procs
    if len(procs) > 0:
        for proc in procs:
            proc.terminate()
    root.destroy()


root = Tk()
root.title('growlight')
timeframe = Frame(root)

hr_cb = Combobox(timeframe, values=hrs, width=5)
hr_cb.set('07')
colon = Label(timeframe, text=':')
min_cb = Combobox(timeframe, values=mins, width=5)
min_cb.set('00')
len_cb = Combobox(root, values=hrs, width=5)
len_cb.set(12)
hr_lbl = Label(root, text="Start Time:")
len_lbl = Label(root, text="Length of daylight:")
go = Button(root, text="reset cycle", command=light_timer)

hr_cb.grid(row=1, column=0)
colon.grid(row=1, column=1)
min_cb.grid(row=1, column=2)

hr_lbl.grid(row=0, column=0)
timeframe.grid(row=1, column=0)
len_lbl.grid(row=2, column=0)
len_cb.grid(row=3, column=0)
go.grid(row=4, column=0)

root.protocol("WM_DELETE_WINDOW", cleanup_kill)
root.mainloop()