"""
uv-belichter-software - The main program run at the Pi Picos startup
Copyright (C) 2024  Benjamin Burkhardt

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
"""


import utils
from lcdMenu import lcdMenu
from WelcomeScreen import WelcomeScreen
from time import sleep, time_ns
from gc import collect  # garbage collector for better memory performance

config = utils.Config()
btn_mapping = {"ok_btn": config.PIN_IN_BTN_1, "next_btn": config.PIN_IN_BTN_2}  # the btn mapping for all lcdMenus

# extra functions to access the garbage collector
def manual():
    config.LCD.clear()
    set_value = config.PIN_OUT_RELAIS.value()
    config.LCD.putstr(f"---- MANUAL ----    State: {set_value}    ")
    while True:
        if set_value != config.PIN_IN_SWITCH.value():
            config.PIN_OUT_RELAIS.value(config.PIN_IN_SWITCH.value())
            set_value = config.PIN_OUT_RELAIS.value()
            config.LCD.putstr(f"---- MANUAL ----    State: {set_value}    ")
        if config.PIN_IN_BTN_1.value() == 1 or config.PIN_IN_BTN_2.value() == 1:
            return True  # exit on press of these buttons; True to disable the Quitting message from lcdMenu
def timer():
    timer_menu = lcdMenu(config.LCD, btn_mapping, scroll_direction=True, cycle=True, hide_menu_name=False, name="TIMERS")
    timer_values_original = [config.TIMER_1_DURATION, config.TIMER_2_DURATION, config.TIMER_3_DURATION]
    timer_values = timer_values_original.copy()  # here, the current timers time is stored when interrupting via the interrupt_pin (see below)
    timer_splits = [lambda: divmod(round(timer_values[0]), 60), lambda: divmod(round(timer_values[1]), 60), lambda: divmod(round(timer_values[2]), 60)]
    interrupt_pin = config.PIN_IN_BTN_1  # the interrupt btn stops the timer, saves the current time and goes back to the menu
    reset_pin = config.PIN_IN_BTN_2  # the reset btn restores the default value
    start_stop_pin = config.PIN_IN_SWITCH  # the start_stop switch starts/stops the timer
    
    # timer_number is the number of the timer that will be run, starting at 1
    # the _timer variable is needed because otherwise python will throw crazy errors regarding "variable accessed before assignment"...
    # ...just see it as a copy of the timer_number-1'th elemnt of the timer_values list (see above)
    def run_timer(timer_number: int, _timer: int):
        config.LCD.clear()
        config.LCD.putstr(f"Timer {timer_number}".center(16))
        last_start_stop_value = start_stop_pin.value()
        config.PIN_OUT_RELAIS.value(last_start_stop_value)
        last_time_ns = time_ns()
        while True:  # now run the timer (if the switch is high)
            config.LCD.move_to(0,1)
            _timer_div = divmod(round(_timer), 60)
            config.LCD.putstr(f"{_timer_div[0]:02d}:{_timer_div[1]:02d}".center(16))
            if interrupt_pin.value() == 1:
                timer_values[timer_number-1] = _timer  # save the current state
                last_start_stop_value = 0  # turn the LEDs off!
                config.PIN_OUT_RELAIS.value(last_start_stop_value)
                return None
            if reset_pin.value() == 1:
                _timer = timer_values_original[timer_number-1]  # reset the timers
            if _timer <= 0:
                config.PIN_OUT_RELAIS.off()
                return True
            sleep(0.05)
            if last_start_stop_value != (new_value := start_stop_pin.value()):
                last_start_stop_value = new_value
                config.PIN_OUT_RELAIS.value(new_value)
                last_time_ns = time_ns()
            if start_stop_pin.value() == 1:
                _timer -= (time_ns() - last_time_ns) / 1000**3
                last_time_ns = time_ns()
    
    timer_programs = [(f"T1 - {timer_splits[0]()[0]:02d}:{timer_splits[0]()[1]:02d}", lambda: run_timer(1, timer_values[0])),
                      (f"T2 - {timer_splits[1]()[0]:02d}:{timer_splits[1]()[1]:02d}", lambda: run_timer(2, timer_values[1])),
                      (f"T3 - {timer_splits[2]()[0]:02d}:{timer_splits[2]()[1]:02d}", lambda: run_timer(3, timer_values[2])),
                      ("Exit", timer_menu.stop)]
    timer_menu.setup(timer_programs)  # give it the callback list
    timer_menu.run()
    del timer_menu, timer_programs
    collect()
    return True  # disable the "Quitting" message from lcdMenu
def lcd_big_hello():
    import lcd_big_hello as lbh
    lbh.run(config.LCD)
    del lbh
    collect()
    return True
def input_tests():
    import input_tests as input_tests
    input_tests.run(serial_output=False)
    collect()
    return True
def settings():
    settings_menu = lcdMenu(config.LCD, btn_mapping, scroll_direction=True, cycle=True, hide_menu_name=False, name="SETTINGS")
    def swap_welcome():
        config.STARTUP_WELCOME_SHOW = not config.STARTUP_WELCOME_SHOW
        config.LCD.clear()
        config.LCD.putstr(f" Welcome Screen ")
        if config.STARTUP_WELCOME_SHOW:
            config.LCD.putstr("--- Enabled! ---")
        else:
            config.LCD.putstr("--- Disabled ---")
        sleep(1)
    def welcome_cycles():
        config.LCD.clear()
        current_cycles = config.STARTUP_WELCOME_CYCLES
        
        option_down = [" ", "v"][current_cycles>1]
        config.LCD.putstr(f"     Cycles     \n{option_down} {str(current_cycles).center(12)} ^")
        btn_left = config.PIN_IN_BTN_1
        btn_right = config.PIN_IN_BTN_2
        while True:
            if btn_left.value() == 1:
                sleep(0.1)  # this value is a good compromise between being able to press both buttons and a fast up/down speed
                if btn_right.value() == 1:
                    config.STARTUP_WELCOME_CYCLES = current_cycles
                    config.LCD.move_to(0,1)  # move to the second row
                    config.LCD.putstr(f"Now set to {current_cycles}".center(16))  # show a little info that it is now set
                    while btn_right.value() == 1 or btn_left.value() == 1:  # wait till both btns are released
                        pass
                    return True
                
                current_cycles -= 1
                if current_cycles < 1: current_cycles = 1
                option_down = [" ", "v"][current_cycles>1]
                config.LCD.putstr(f"     Cycles     \n{option_down} {str(current_cycles).center(12)} ^")
            if btn_right.value() == 1:
                sleep(0.1)
                if btn_left.value() == 1:
                    config.STARTUP_WELCOME_CYCLES = current_cycles
                    config.LCD.move_to(0,1)  # move to the second row
                    config.LCD.putstr(f"Now set to {current_cycles}".center(16))  # show a little info that it is now set
                    while btn_right.value() == 1 or btn_left.value() == 1:  # wait till both btns are released
                        pass
                    return True
                current_cycles += 1
                option_down = [" ", "v"][current_cycles>1]
                config.LCD.putstr(f"     Cycles     \n{option_down} {str(current_cycles).center(12)} ^")
    
    # with n being the number of the timer (starting at 0)
    def set_n_timer(n: int):
        # a small helper function to save the value of the n'th timer...
        # as you can't programatically access TIMER_n_DURATION
        def set_timer_helper(n, value):
            if n == 0:
                config.TIMER_1_DURATION = value
            elif n == 1:
                config.TIMER_2_DURATION = value
            elif n == 2:
                config.TIMER_3_DURATION = value
            else:
                utils.log(0, "There are only 3 timers at all. Trying to set the timer number {n} failed.")
                
        config.LCD.clear()
        timer_values = [config.TIMER_1_DURATION, config.TIMER_2_DURATION, config.TIMER_3_DURATION]
        current_timer = timer_values[n]  # get the n'th timer
        current_timer_div = lambda: divmod(current_timer, 60)
        

        config.LCD.putstr(f"Timer {n+1}".center(16))
        config.LCD.putstr(f"{'v' if current_timer > 1 else ' '} " + f"{current_timer_div()[0]:02d}:{current_timer_div()[1]:02d}".center(12) + " ^")
        btn_left = config.PIN_IN_BTN_1
        btn_right = config.PIN_IN_BTN_2
        left_was_released = True
        right_was_released = True
        while True:
            if btn_left.value() == 1:
                if left_was_released:
                    time_press_start = time_ns()
                    left_was_released = False
                sleep(0.1)  # this value is a good compromise between being able to press both buttons and a fast up/down speed
                if btn_right.value() == 1:  # exit if both btns are pressed
                    set_timer_helper(n, current_timer)
                    config.LCD.move_to(0,1)  # move to the second row
                    config.LCD.putstr(f"Saved!".center(16))  # show a little info that it is now set
                    while btn_right.value() == 1 or btn_left.value() == 1:  # wait till both btns are released
                        pass
                    return True
                # define the step width
                time_now = time_ns()
                if (time_now - time_press_start) <= 1*(10**9):  # max. 1 seconds pressed
                    current_timer -= 1
                elif (time_now - time_press_start) <= 2*(10**9):  # max. 2 seconds pressed
                    current_timer -= 5
                elif (time_now - time_press_start) <= 3*(10**9):  # max. 3 seconds pressed
                    current_timer -= 10
                elif (time_now - time_press_start) <= 4*(10**9):  # max. 4 seconds pressed
                    current_timer -= 30
                elif (time_now - time_press_start) <= 5*(10**9):  # max. 5 seconds pressed
                    current_timer -= 60
                else:  # longer than 5s pressed
                    current_timer -= 300
                if current_timer < 1: current_timer = 5999
                config.LCD.move_to(0,1)
                config.LCD.putstr("v " + f"{current_timer_div()[0]:02d}:{current_timer_div()[1]:02d}".center(12) + " ^")
            else:
                left_was_released = True
            if btn_right.value() == 1:
                if right_was_released:
                    time_press_start = time_ns()
                    right_was_released = False
                sleep(0.1)
                if btn_left.value() == 1:  # exit if both btns are pressed
                    set_timer_helper(n, current_timer)
                    config.LCD.move_to(0,1)  # move to the second row
                    config.LCD.putstr(f"Saved!".center(16))  # show a little info that it is now set
                    while btn_right.value() == 1 or btn_left.value() == 1:  # wait till both btns are released
                        pass
                    return True
                # define the step width
                time_now = time_ns()
                if (time_now - time_press_start) <= 1*(10**9):  # max. 1 seconds pressed
                    current_timer += 1
                elif (time_now - time_press_start) <= 2*(10**9):  # max. 2 seconds pressed
                    current_timer += 5
                elif (time_now - time_press_start) <= 3*(10**9):  # max. 3 seconds pressed
                    current_timer += 10
                elif (time_now - time_press_start) <= 4*(10**9):  # max. 4 seconds pressed
                    current_timer += 30
                elif (time_now - time_press_start) <= 5*(10**9):  # max. 5 seconds pressed
                    current_timer += 60
                else:  # longer than 5s pressed
                    current_timer += 300
                if current_timer > 5999: current_timer = 1
                config.LCD.move_to(0,1)
                config.LCD.putstr("v " + f"{current_timer_div()[0]:02d}:{current_timer_div()[1]:02d}".center(12) + " ^")
            else:
                right_was_released = True
            
    settings_programs = [("Show welcome", swap_welcome),
                         ("Welcome cycles", welcome_cycles),
                         ("Timer 1", lambda: set_n_timer(0)),
                         ("Timer 2", lambda: set_n_timer(1)),
                         ("Timer 3", lambda: set_n_timer(2)),
                         ("Exit", settings_menu.stop)]
    settings_menu.setup(settings_programs)  # give it the callback list
    settings_menu.run()  # run the menu until it's closed
    del settings_menu, settings_programs
    collect()
    return True
def run_demo_menu():
    demo_menu = lcdMenu(config.LCD, btn_mapping, scroll_direction=True, cycle=True, hide_menu_name=False, name="DEMOS")
    demo_programs = [("LCD Demo", lcd_big_hello),
                     ("Input tests", input_tests),
                     ("Exit", demo_menu.stop)]
    demo_menu.setup(demo_programs)  # give it the callback list
    demo_menu.run()
    del demo_menu, demo_programs
    collect()
    return True

if config.STARTUP_WELCOME_SHOW:
    ws = WelcomeScreen(config.LCD,
                       interrupt_pins=[config.PIN_IN_BTN_1, config.PIN_IN_BTN_2, config.PIN_IN_SWITCH],
                       subtitle=config.STARTUP_PROJECT_NAME,
                       starting_msg=config.STARTUP_MESSAGE_STARTING,
                       started_msg=config.STARTUP_MESSAGE_FINISHED)
    ws.show(cycles=config.STARTUP_WELCOME_CYCLES)
    del ws
    collect()

    
# create the menus
main_menu = lcdMenu(config.LCD, btn_mapping, scroll_direction=True, cycle=True, hide_menu_name=False, name="PROGRAMS")
main_programs = [("Timer", timer),
                 ("Manual", manual),
                 ("Demos", run_demo_menu),
                 ("Settings", settings)]
main_menu.setup(main_programs)  # give it the callback list

# and run the main menu (will be an endless loop)
main_menu.run()