#!/usr/bin/python3

import pygame
from pygame._sdl2 import Window
from dataclasses import dataclass
import gui


@dataclass
class Settings:
    fps: int = 60
    window_size: tuple = (1000, 600)


class Examples:
    def __init__(self):
        pygame.init()

        self.screen = pygame.display.set_mode((1000, 600), pygame.RESIZABLE)
        pygame.display.set_caption("Game")
        self.window = Window.from_display_module()

        self.loading_surface = self.generate_loading_surface()
        self.screen.blit(self.loading_surface, (0, 0))
        pygame.display.update()

        self.settings = Settings()

        self.fps = self.settings.fps

        # colors
        self.gray = (20, 20, 20)

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

        self.big_font = pygame.font.Font(pygame.font.get_default_font(), 32)

        # loading finished
        self.window.size = self.settings.window_size

        self.gui = gui.GUI(self)

        self.running = True

    def generate_loading_surface(self):
        default_font = pygame.font.SysFont("ubuntu", 32, True)
        loading_text = default_font.render("Loading...", True, (240, 240, 240))

        w, h = self.screen.get_size()

        loading_surface = pygame.Surface((w, h), flags=pygame.SRCALPHA)

        loading_surface.fill((40, 40, 40))
        loading_surface.blit(loading_text,
                             (w // 2 - loading_text.get_width() // 2, h // 2 - loading_text.get_height() // 2))

        return loading_surface

    def loop(self):
        self.screen.fill(self.gray)

        self.get_events()
        if not self.running:
            return

        self.gui.draw()

        if self.loading_surface.get_alpha() > 0:
            self.screen.blit(self.loading_surface, (0, 0))
            self.loading_surface.set_alpha(self.loading_surface.get_alpha() - 4)

        pygame.display.update()
        self.clock.tick(self.fps)

    def get_events(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                self.exit()
                return

            elif event.type == pygame.VIDEORESIZE:
                self.window_update(event.size)

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

                if self.gui.current_page in self.gui.buttons:
                    for button in self.gui.buttons[self.gui.current_page]:
                        button.check(pos, pressed)

    def exit(self):
        self.running = False

        print("Bye!")

    def window_update(self, size):
        self.settings.window_size = size
        self.gui.update()


if __name__ == "__main__":
    examples = Examples()

    while examples.running:
        examples.loop()