package org.toop.graphics;

import org.toop.platform.graphics.opengl.*;

import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;

public abstract class Renderer {
	public enum API {
		NONE,
		OPENGL,
	};

    protected static final Logger logger = LogManager.getLogger(Renderer.class);

	private static API api = API.NONE;
	private static Renderer instance = null;

	public static Renderer setup(API api) {
		if (instance != null) {
			logger.warn("Renderer is already setup.");
			return instance;
		}

		switch (api) {
			case OPENGL:
				instance = new OpenglRenderer();
				break;

			default:
				logger.fatal("No valid renderer api chosen");
				return null;
		}

		Renderer.api = api;
		return instance;
	}

	public static API getApi() {
		return api;
	}

	public void cleanup() {
		instance = null;
		logger.info("Renderer cleanup.");
	}

	public abstract void clear();
	public abstract void render();
}