module hibis_rsdl;

import bindbc.sdl;
import hibis.renderer.renderer;
import hibis.math.types;
import std.exception;
import std.format;

import std.string : toStringz;

/** \class RSDL
* Renderer implementation using SDL2 Renderer for the game engine
*/
class RSDL : Renderer {
	this(string title, IntVec2 size) {
		const SDLSupport ret = loadSDL();
		if(ret != sdlSupport) {
			throw new Exception("Couldn't load SDL library!");
		}

		SDL_Init(SDL_INIT_VIDEO);

		// Create window. `title` is cast to a char* here as toStringz returns an immutable char* (causing an error)
		window = SDL_CreateWindow(cast(char*)toStringz(title), SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
									size.x, size.y, SDL_WINDOW_RESIZABLE);

		if (window is null) {
			string error = format("Couldn't create window! what: %d", SDL_GetError());
			throw new Exception(error);
		}

		renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

		if (renderer is null) {
			string error = format("Couldn't create renderer! what: %d", SDL_GetError());
			throw new Exception(error);
		}
	}

	~this() {
		SDL_DestroyRenderer(renderer);
		SDL_DestroyWindow(window);
		SDL_Quit();
	}

	override void clearScreen(Color col = Color(0, 0, 0, 1)) {
		SDL_SetRenderDrawColor(renderer, col.r, col.g, col.b, col.a);
		SDL_RenderClear(renderer);
	}

	override void renderCurrent() {
		SDL_RenderPresent(renderer);
	}

	override void preDraw() {}
	override void postDraw() {}

	override void update() {}

	override void setWindowTitle(string title) {}

	private SDL_Window* window;
	private SDL_Renderer* renderer;
}