#!/usr/bin/python3

import os
import pygame
from tools import pg  # if you import pg from tools, you dont need to init pygame.
from tools.settings import Settings


# integrated settings (I dont trust my own settings class.)
DEFAULT_WINDOW_SIZE = (800, 600)
FPS = 60
SAVE_SETTINGS_ON_EXIT = True


# some initializing
pygame.init()
screen = pygame.display.set_mode(DEFAULT_WINDOW_SIZE)
pygame.display.set_caption("Cowyeet 2.0")

if os.path.isfile("settings.txt"):
    settings = Settings("settings.txt")

else:
    settings = Settings()
    settings.path = "settings.txt"
    settings["win_size"] = DEFAULT_WINDOW_SIZE
    settings.save()

# loading screen
default_font = pygame.font.SysFont("ubuntu", 16)
loading_text = default_font.render("Loading...", True, (240, 240, 240))

screen.fill((40, 40, 40))
screen.blit(loading_text, (400 - loading_text.get_width() / 2, 300 - loading_text.get_height() / 2))
pygame.display.update()


# variables
nero = (40, 40, 40)  # colors (color names by https://www.color-blindness.com/color-name-hue/)
dim_gray = (100, 100, 100)
white_smoke = (240, 240, 240)

buttons = []  # misc
text_buttons = []
active_buttons = []
last_frame_mouse_pressed = False
page = "main_menu"


# pygame objects
clock = pygame.time.Clock()  # misc
mouse = pygame.mouse

bigger_default_font = pygame.font.SysFont("ubuntu", 32)  # fonts


# coordinate calculations
def center_x(width: int):
    return screen.get_width() / 2 - width / 2


def center_y(height: int):
    return screen.get_height() / 2 - height / 2


def center(size):
    width, height = size

    return center_x(width), center_y(height)


# buttons
start_button = pg.TextButton("Start", center, screen, lambda: page_switch("game"), text_color=white_smoke, bg_color=dim_gray, font=bigger_default_font)
buttons.append(start_button)
text_buttons.append(start_button)


def close():
    global running
    running = False


def window_size_reload(new_size):
    for button in text_buttons:
        button.update()


def main_menu_page():
    start_button.blit(screen)


def page_selector():
    if page == "main_menu":
        main_menu_page()


def page_switch(new_page: str=None):
    global active_buttons
    global page

    if not new_page is None:
        page = new_page

    if page == "main_menu":
        active_buttons = [start_button]

    else:
        print("Error: Page not found.")

    # for button in buttons:
    #     button.active = False
    #
    # for button in active_buttons:
    #     button.active = True


def get_events():
    global last_frame_mouse_pressed

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            close()
            return

        if event.type == pygame.MOUSEBUTTONDOWN:
            pressed = mouse.get_pressed()
            pos = mouse.get_pos()

            if not last_frame_mouse_pressed:
                for button in active_buttons:
                    button.check(pos, pressed)

            last_frame_mouse_pressed = True

        if event.type == pygame.VIDEORESIZE:

            window_size_reload(event.size)


def loop():
    global last_frame_mouse_pressed

    screen.fill(nero)

    get_events()

    if not running:
        return

    pressed = mouse.get_pressed()
    if not pressed[0] and not pressed[1] and not pressed[2]:
        last_frame_mouse_pressed = False

    page_selector()

    pygame.display.update()

    clock.tick(FPS)


# loading completed

screen = pygame.display.set_mode(settings["win_size"], flags=pygame.RESIZABLE)
screen.fill(nero)
pygame.display.update()

page_switch()

running = True

while running:
    loop()

pygame.quit()

if SAVE_SETTINGS_ON_EXIT:
    settings.save()