/* Included all */
use lexsdl::*;

/* Included functions */
use sdl2_sys::SDL_RenderSetLogicalSize;
use sdl2_sys::SDL_RenderFillRect;
use sdl2_sys::SDL_SetTextureColorMod;

/* Included types */
use std::ffi::CString;
use libc::c_int;
use sdl2_sys::SDL_Rect;
use lexlib::Vec2;

// include bytes of a texture.
const PURPLE_GUY_TEXTURE_WALK_DATA: &[u8] = include_bytes!("assets/purpleGuy_walk.png");

fn main(){unsafe{
	// initialize sdl and image with the LEXSDL dafaults.
	LEXSDL_Init(0);
	LEXSDL_InitIMG(0);
	
	// title for the window
	let window_title = CString::new("LEXSDL Rust Example - Sprites").unwrap();
	
	//create the window and renderer
	LEXSDL_CreateWindow(window_title.as_ptr(),0);
	LEXSDL_CreateRenderer(0);
	
	// Set a size for the rendering target.
	SDL_RenderSetLogicalSize(LEXSDL_GetRenderer(), 64,64);
	
	// counter intuitively the draw color will be the background color
	LEXSDL_SetDrawColor(0x00,0x88,0xFF,0xFF);
	
	// direction of the texture of the ring in the sky
	let ring_file = CString::new("examples/assets/ring001.png").unwrap();
	
	// load the texture of the sky ring
	let ring_texture_id = LEXSDL_TextureLoad(ring_file.as_ptr());
	
	// load the byte data of the guy sprite
	let purple_guy_texture_id = LEXSDL_TextureLoadBytes(PURPLE_GUY_TEXTURE_WALK_DATA.as_ptr() as *const u8, PURPLE_GUY_TEXTURE_WALK_DATA.len() as c_int);
	
	
	// create the sprite of the purple guy
	let purple_guy_texture_walk_sprite_id = LEXSDL_CreateSprite(purple_guy_texture_id, 4, 6, SDL_Rect {x: 0, y: 0, w: 4, h: 4});
	
	// create the sprite of the sky ring
	let ring_sprite_id = LEXSDL_CreateSprite(ring_texture_id, 4, 12, SDL_Rect {x: 0, y: 0, w: 5, h: 5});
	
	//setup variables for the guy
	let mut guy_pos = Vec2::new(4,60);
	let guy_speed = 16;
	let mut guy_direction = false;
	let mut frame_cnt = 0;
	
	// variables for changing color of the ring
	let mut ring_color_change_dir = false;
	let mut ring_red = 0;
	let mut ring_green = 0;
	let mut ring_blue = 0;
	
	while LEXSDL_EventQuit() == 0 {
		// handle default events
		LEXSDL_HandleEvents();
		
		// start a new frame
		LEXSDL_NewFrame();
		frame_cnt += 1;
		
		// fill the area with a rect as background
		SDL_RenderFillRect(LEXSDL_GetRenderer(),std::ptr::null());
		
		// quick dirty color change
		if ring_red == 0 { ring_color_change_dir = false }
		if !ring_color_change_dir {
			if ring_red < 255						{ ring_red += 1; }
			if ring_red > 100 && ring_green < 255		{ ring_green += 1; }
			if ring_green > 100 && ring_blue < 255	{ ring_blue += 1; }
			if ring_red > 250 && ring_green > 250 && ring_blue > 250 { ring_color_change_dir = true; }
		} else {
			if ring_blue > 0						{ ring_blue -=1; }
			if ring_blue < 150 && ring_green > 0	{ ring_green -= 1; }
			if ring_green < 150 && ring_red > 0	{ ring_red -= 1; }
		}
		
		// change color if the ring
		SDL_SetTextureColorMod(LEXSDL_SpriteGetTexture(ring_sprite_id),ring_red,ring_green,ring_blue);
		
		// play the animation of the ring
		LEXSDL_SpritePlay(ring_sprite_id,10,10,4,4);
		
		// play the animation of the guy depending of his direction
		if guy_direction {
			LEXSDL_SpritePlayFlip(purple_guy_texture_walk_sprite_id,guy_pos.x,guy_pos.y,4,4);
		} else {
			LEXSDL_SpritePlay(purple_guy_texture_walk_sprite_id,guy_pos.x,guy_pos.y,4,4);
		}
		
		// check the frame count to move the guy
		if frame_cnt == guy_speed {
			frame_cnt = 0;
			if guy_direction {
				if guy_pos.x <= 0 { guy_direction = false; }
				guy_pos.x -= 1;
			} else {
				if guy_pos.x >= 60 { guy_direction = true; }
				guy_pos.x += 1;
			}
		}
		
		// finally show the frame
		LEXSDL_ShowFrame();
	}
	
	// termination
	LEXSDL_Terminate();
	LEXSDL_Quit();
}}