import argparse
import logging
import os
import pickle
from tkinter import Tk, simpledialog, messagebox

import pygame
from pygame import locals as pglocals

from config import (RESOLUTION, MAP_RESOLUTION,
                    SNAKE_COLOR, BACKGROUND_COLOR, FONT_COLOR,
                    INITIAL_SNAKE_SIZE, SCORES_FILE, MAX_HIGH_SCORES_COUNT)
from objects import Snake, Apple
from utils import get_score_text, Direction


parser = argparse.ArgumentParser()
parser.add_argument('-v', '--verbose', help='Show debug logs', action='store_true')
args = parser.parse_args()

level = logging.INFO
if args.verbose:
    level = logging.DEBUG

logging.basicConfig(level=level)
logger = logging.getLogger(__name__)

pygame.init()
Tk().wm_withdraw()  # to hide the main window


def main():
    clock = pygame.time.Clock()
    logger.debug('pygame initialized')

    if not pygame.font:
        logger.warning('Fonts disabled')
    if not pygame.mixer:
        logger.warning('Sound disabled')

    screen = pygame.display.set_mode(RESOLUTION)  # type: pygame.Surface
    pygame.display.set_caption('Snake')
    scores = []
    if os.path.isfile(SCORES_FILE):
        with open(SCORES_FILE, 'rb') as scores_file:
            scores = pickle.load(scores_file)

    logger.info(f'Previous high scores : {scores}')

    # Retry loop
    while True:
        screen.fill(BACKGROUND_COLOR)
        snake = Snake()
        screen.fill(SNAKE_COLOR, snake.head)
        apple = Apple()
        apple.display(screen)

        score = 0
        score_text, score_rect = get_score_text(score)
        screen.blit(score_text, score_rect)

        screen.fill(FONT_COLOR, pygame.Rect(0, MAP_RESOLUTION[1], MAP_RESOLUTION[0], 5))

        pygame.display.flip()
        if scores:
            display_scores(scores)

        # Main game loop
        while True:
            for event in pygame.event.get():
                if event.type == pglocals.QUIT:
                    logger.warning('Received QUIT event')
                    return
                if event.type == pglocals.KEYDOWN:
                    if event.key == pglocals.K_DOWN or event.key == pglocals.K_s:
                        snake.direction = Direction.DOWN
                    elif event.key == pglocals.K_LEFT or event.key == pglocals.K_q:
                        snake.direction = Direction.LEFT
                    elif event.key == pglocals.K_UP or event.key == pglocals.K_z:
                        snake.direction = Direction.UP
                    elif event.key == pglocals.K_RIGHT or event.key == pglocals.K_d:
                        snake.direction = Direction.RIGHT
                    elif event.key == pglocals.K_ESCAPE:
                        pause = True
                        while pause:
                            clock.tick(5)
                            for subevent in pygame.event.get():
                                if subevent.type == pglocals.KEYDOWN and subevent.key == pglocals.K_ESCAPE:
                                    pause = False
                                    break

            dirty_rects = snake.move(screen, apple)
            if snake.dead:
                logger.info(f'Vous avez perdu ! Score : {score}')
                break

            if snake.head.colliderect(apple.rect):
                apple.renew()
                score += apple.score
                logger.debug(f'Apple eaten, new score : {score}')

                screen.fill(BACKGROUND_COLOR, score_rect)
                old_score_rect = score_rect

                score_text, score_rect = get_score_text(score)
                screen.blit(score_text, score_rect)
                dirty_rects.append(score_rect.union(old_score_rect))

            dirty_rects.append(apple.display(screen))

            pygame.display.update(dirty_rects)

            # Run faster as snake grows
            clock.tick(10 - INITIAL_SNAKE_SIZE + len(snake.slots))

        display_end_screen(screen, score)
        scores = save_score(score, scores)

        restart = False
        while not restart:
            for event in pygame.event.get():
                if event.type == pglocals.QUIT:
                    logger.info('Received QUIT event')
                    logger.info(f'High scores : {scores}')
                    return
                if event.type == pglocals.KEYDOWN:
                    if event.key == pglocals.K_r:
                        logger.info('Restarting game')
                        restart = True
                    elif event.key == pglocals.K_s:
                        display_scores(scores)

            clock.tick(5)


def display_scores(scores):
    scores_str = '\n'.join(map(lambda s: f"{s['player']} : {s['score']}", scores))
    messagebox.showinfo("Tableau des scores", scores_str)


def save_score(score, scores):
    username = simpledialog.askstring(
        "Enregistrer le score",
        f"Entrez votre nom d'utilisateur ou laissez vide pour ne pas enregistrer."
    )
    if username:
        scores.append({'player': username, 'score': score})
        logger.info(f'Saving {username}: {score}')
        scores = sorted(scores, key=lambda x: x['score'], reverse=True)[:MAX_HIGH_SCORES_COUNT]
        logger.info(f'New high scores : {scores}')
        with open(SCORES_FILE, 'wb') as scores_file:
            pickle.dump(scores, scores_file)
    else:
        logger.debug('Not saving score')
    return scores


def display_end_screen(screen, score):
    screen.fill(BACKGROUND_COLOR)
    font = pygame.font.Font(None, 60)
    text = font.render(f"PERDU ! Score : {score}", 1, FONT_COLOR)
    text_rect = text.get_rect()  # type: pygame.Rect
    text_rect.center = screen.get_rect().center
    screen.blit(text, text_rect)
    font = pygame.font.Font(None, 30)
    text = font.render(f"R pour recommencer", 1, FONT_COLOR)
    text_rect = text.get_rect()  # type: pygame.Rect
    text_rect.center = screen.get_rect().center
    text_rect.top += 45
    screen.blit(text, text_rect)
    text = font.render(f"S pour les scores", 1, FONT_COLOR)
    text_rect = text.get_rect()  # type: pygame.Rect
    text_rect.center = screen.get_rect().center
    text_rect.top += 70
    screen.blit(text, text_rect)
    pygame.display.flip()


if __name__ == '__main__':
    main()