import tkinter as tk

STATE_IDLE = "IDLE"
STATE_FOCUS = "FOCUS"
STATE_WORK = "WORK"
STATE_OVERTIME = "OVERTIME"
STATE_BREAK = "BREAK"

current_state = STATE_IDLE
seconds_left = 0
distractions = 0

width = 120
height = 140

app = tk.Tk()
app.title("Focus-Timer")    
app.configure(background="#17153B")
app.geometry(f"{width}x{height}")
app.minsize(width, height)
app.maxsize(width, height)
app.resizable(False, False)

timer_label = tk.Label(app, text="hh:mm:ss",fg="#C8ACD6",background="#17153B",font=("Helvetica", 25) , anchor="center")
timer_label.pack(expand=True,fill="y")

def tick():
	global seconds_left, current_state

	match current_state:
		case STATE_IDLE:
			return
		case STATE_OVERTIME:
			seconds_left += 1
		case _:
			seconds_left -= 1

	update_timer_label()

	if current_state in ("FOCUS","WORK","BREAK") and seconds_left <= 0:
		handle_transition()
	
	app.after(1000, tick)

def update_timer_label():
	global seconds_left
	mins, secs = divmod(seconds_left, 60)
	time_label.config(text=f"{mins}:{secs}")

def handle_transition():
	global current_state, seconds_left, focus_attempts

	match current_state:
		case "FOCUS":
			current_state = STATE_WORK
			seconds_left = 4200 # 70 min
			distractions = 0
		
		case "WORK":
			current_state = STATE_OVERTIME
			seconds_left = 0
		
		case "BREAK":
			current_state = STATE_IDLE
			seconds_left = 0

def start_button():
	global current_state, seconds_left, distractions
	distractions = 0
	current_state = STATE_FOCUS
	seconds_left = 0

	tick()

def distracted_button():
	global current_state, seconds_left, distractions

	if current_state != STATE_FOCUS:
		return

	distractions += 1

	if distractions > 2:
		seconds_left = 600
	else:
		seconds_left = 1200 - (300 * distractions)

	update_timer_label()

def break_button():
	global current_state, seconds_left

	current_state = STATE_BREAK
	seconds_left = 1500
	update_timer_label()

app.mainloop()