main.py

from tkinter import *
import math

# ---------------------------- CONSTANTS ------------------------------- #
PINK = "#e2979c"
RED = "#e7305b"
GREEN = "#9bdeac"
YELLOW = "#f7f5dd"
FONT_NAME = "Courier"
WORK_MIN = 25
SHORT_BREAK_MIN = 5
LONG_BREAK_MIN = 20
reps = 0
timer = None


# ---------------------------- TIMER RESET ------------------------------- #
def reset_timer():
    window.after_cancel(timer)
    canvas.itemconfig(countdown_mech, text="00:00")
    txt.config(text="Timer")
    check_marks.config(text="")
    global reps
    reps = 0


# ---------------------------- TIMER MECHANISM ------------------------------- #
def start_timer():
    global reps
    reps = reps + 1

    short_break_sec = SHORT_BREAK_MIN * 60
    long_break_sec = LONG_BREAK_MIN * 60
    work_sec = WORK_MIN * 60

    if reps % 8 == 0:
        txt.config(text="Break", fg=RED)
        count_down(long_break_sec)
    elif reps % 2 == 0:
        txt.config(text="Break", fg=PINK)
        count_down(short_break_sec)
    else:
        txt.config(text="Work", fg=GREEN)
        count_down(work_sec)


# ---------------------------- COUNTDOWN MECHANISM ------------------------------- #

def count_down(count):
    mini = math.floor(count / 60)
    sec = count % 60
    if sec < 10:
        sec = f"0{sec}"

    canvas.itemconfig(countdown_mech, text=f"{mini}:{sec}")

    if count > 0:
        global timer
        timer = window.after(1000, count_down, count - 1)
    else:
        start_timer()
        print(reps)
        marks = ""
        work_sessions = math.floor(reps / 2)
        for _ in range(work_sessions):
            marks += "✔"
        check_marks.config(text=marks)


# ---------------------------- UI SETUP ------------------------------- #
window = Tk()
window.title("Pomodoro")
window.config(padx=100, pady=50, bg=YELLOW)

canvas = Canvas(width=200, height=224, bg=YELLOW, highlightthickness=0)
tomato_img = PhotoImage(file="tomato.png")

canvas.create_image(100, 112, image=tomato_img)
countdown_mech = canvas.create_text(103, 130, text="00:00", fill="white", font=(FONT_NAME, 30, "bold"))
canvas.grid(row=1, column=1)

txt = Label(text="Timer", font=(FONT_NAME, 50), fg=GREEN, bg=YELLOW)
txt.grid(row=0, column=1)

button1 = Button(text="Start", highlightthickness=0, command=start_timer)
button1.grid(row=2, column=0)

button2 = Button(text="Reset", highlightthickness=0, command=reset_timer)
button2.grid(row=2, column=2)

check_marks = Label(fg=GREEN, bg=YELLOW)
check_marks.grid(row=3, column=1)

window.mainloop()