from tkinter import *#window
from tkinter import ttk
from io import StringIO
from datetime import datetime

root = Tk()
root.title("GUI")
root.minsize(230,215)

def bedtime_from_now(H,M, eol=True): #global now
    Hnow = now.hour
    Mnow = now.minute

    if M >= Mnow:
        M2 = M - Mnow
    else:
        M2 = 60 - Mnow + M
        Hnow = Hnow + 1
        if Hnow >= 24:
            Hnow = Hnow - 24

    if H >= Hnow:
        H2 = H - Hnow
    else:
        H2 = 24 - Hnow + H

    print(" ({:02}시간 {:02}분 후)".format(H2, M2),file=sio,end='')

    if eol==True:
        print(file=sio)

def bed_time(h,m=0,eol=True):
    if m==0:
        H = (hour - h + 24) % 24
        M = 0
    else:
        if minute - m >= 0:
            M = minute - m
            H = (hour - h + 24) % 24
        else:
            M = (minute - m + 60) % 60
            H = (hour-1 - h + 24) % 24

    print("{:02}시 {:02}분".format(H,M),file=sio,end='')

    bedtime_from_now(H,M,eol)

def click():
    #global strs3
    global hour ,minute
    global now
    #global sio

    sio.seek(0)
    sio.truncate(0)

    now = datetime.now()

    hour = int(strs.get())
    minute = int(strs2.get())

    print ("현재시각 {}시 {:02}분\n".format(now.hour,now.minute),file=sio)

    print("잠자리에 들 시간",file=sio)
    bed_time(3)
    bed_time(4, 30)
    bed_time(6)
    bed_time(7, 30)
    bed_time(8, 30)
    bed_time(9,m=0,eol=False)
    strs3.set(sio.getvalue())

#end def

strs = StringVar()
strs2 = StringVar()
strs3 = StringVar()

lbl = Label(root,text="일어날 시간을 입력하세요")
lbl.grid(row=0,column=1,padx=5,pady=5)

lbl2 = Label(root, text="   시")
lbl2.grid(row=1, column=0,pady=5,padx=5)

Combx1 = ttk.Combobox(textvariable=strs, width=20)
Combx1['value'] = tuple(str(i) for i in range(0, 23 +1, 1))
#콤보박스 요소 삽입
Combx1.current(0)
Combx1.grid(row=1,column=1,pady=5)

lbl3 = Label(root, text="   분")
lbl3.grid(row=3, column=0)

Combx2 = ttk.Combobox(textvariable=strs2, width=20)
Combx2['value'] = tuple(str(i) for i in range(0,55+5,5))
#콤보박스 요소 삽입
Combx2.current(0)
Combx2.grid(row=3,column=1)

btn = Button(root, text="확인",command=click,width=6,height=1, bg='#cae1ff')
btn.grid(row=4,column=1,pady=10)
sio = StringIO("")

strs3.set("잠자리에 들 시간")
lbl4 = Label(root, textvariable=strs3)
lbl4.grid(row=5, column=1,pady=7)

root.mainloop()
sio.close()