#!/usr/bin/env python3

# RAYCASTER
#
# pip install pysdl2 pysdl2-dll

import sys
import sdl2.ext

WIN_WIDTH = 640
WIN_HEIGHT = 480
DUNGEON_WIDTH = WIN_WIDTH
DUNGEON_HEIGHT = WIN_HEIGHT
PLAYER_SPEED = 10

class Main:

	def __init__(self):
		# Graphics
		sdl2.ext.init()
		self.window = sdl2.ext.Window("Raycaster", size=(WIN_WIDTH, WIN_HEIGHT))
		self.window.show()
		self.surface = self.window.get_surface()

		# Player
		self.player_position = {"x": WIN_WIDTH/2, "y": WIN_HEIGHT/2, "r": 0}

		return

	def run(self):
		running = True
		while running:
			events = sdl2.ext.get_events()
			for event in events:
				if event.type == sdl2.SDL_QUIT:
					running = False
					break
				if event.type == sdl2.SDL_KEYDOWN:
					if event.key.keysym.sym == sdl2.SDLK_UP:
						self.player_position["y"] = int(self.player_position["y"] - PLAYER_SPEED)
					elif event.key.keysym.sym == sdl2.SDLK_DOWN:
						self.player_position["y"] = int(self.player_position["y"] + PLAYER_SPEED)
					if event.key.keysym.sym == sdl2.SDLK_LEFT:
						self.player_position["x"] = int(self.player_position["x"] - PLAYER_SPEED)
					elif event.key.keysym.sym == sdl2.SDLK_RIGHT:
						self.player_position["x"] = int(self.player_position["x"] + PLAYER_SPEED)
					# Limit position
					if self.player_position["x"] < 0:
						self.player_position["x"] = 0
					if self.player_position["x"] > DUNGEON_WIDTH:
						self.player_position["x"] = DUNGEON_WIDTH
					if self.player_position["y"] < 0:
						self.player_position["y"] = 0
					if self.player_position["y"] > DUNGEON_HEIGHT:
						self.player_position["y"] = DUNGEON_HEIGHT

			sdl2.ext.draw.fill(self.surface, sdl2.ext.Color(0,0,0,0)) # Clears screen
			self.draw()
			self.window.refresh()
		return 0

	def draw(self):
		#sdl2.ext.draw.line(self.surface, sdl2.ext.Color(255,0,0,255), (0, 0, self.player_position["x"], self.player_position["y"]))
		sdl2.ext.draw.fill(self.surface, sdl2.ext.Color(0,255,0,255), (self.player_position["x"] - 4, self.player_position["y"] - 4, 4, 4))
		return



if __name__ == '__main__':
	try:
		main = Main()
		main.run()
	except KeyboardInterrupt:
		exit(0)