# -*- coding: utf-8 -*-
# main.py - main module, starts game and main loop
# This file is part of brutalmaze
#
# brutalmaze 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.
#
# brutalmaze 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 brutalmaze.  If not, see <http://www.gnu.org/licenses/>.
#
# Copyright (C) 2017 Nguyễn Gia Phong

from collections import deque

import pygame
from pygame.locals import *

from .constants import ICON, SIZE, INIT_FPS, MAX_FPS, UP, LEFT, DOWN, RIGHT
from .maze import Maze
from .utils import some


def main():
    """Start game and main loop."""
    pygame.init()
    pygame.display.set_icon(ICON)
    pygame.fastevent.init()
    maze, clock = Maze(SIZE, INIT_FPS), pygame.time.Clock()
    fps, flash_time, going = INIT_FPS, deque(), True
    while going:
        events = pygame.fastevent.get()
        for event in events:
            if event.type == QUIT:
                going = False
            elif event.type == VIDEORESIZE:
                maze.resize(event.w, event.h)
            elif event.type == KEYDOWN:
                if event.key == K_F2:   # new game
                    maze.__init__((maze.w, maze.h), fps)
                elif event.key in (K_ESCAPE, K_p):
                    maze.paused ^= True

        if not maze.hero.dead:
            keys = pygame.key.get_pressed()
            buttons = pygame.mouse.get_pressed()
            maze.move(some(keys, LEFT) - some(keys, RIGHT),
                      some(keys, UP) - some(keys, DOWN), fps)
            maze.hero.slashing = keys[K_RETURN] or buttons[2]
            maze.hero.firing = buttons[0]

        if len(flash_time) > 5:
            new_fps = 5000.0 / (flash_time[-1] - flash_time[0])
            flash_time.popleft()
            if new_fps < fps:
                fps -= 1
            elif fps < MAX_FPS and not maze.paused:
                fps += 5
        maze.update(fps)
        flash_time.append(pygame.time.get_ticks())
        clock.tick(fps)
    pygame.quit()