package sagittarius;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.ScreenAdapter;
import com.badlogic.gdx.graphics.Camera;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.utils.viewport.FitViewport;
import com.badlogic.gdx.utils.viewport.Viewport;

class GameScreen extends ScreenAdapter {

// ---------- ATTRIBUTES ----------

    // screen size
	static final int WIDTH = 1920;
	static final int HEIGHT = 1080;

    // drawing stuff
	private SpriteBatch batch;
	private ShapeRenderer shapeRenderer;
    private BitmapFont font;

    // camera stuff
    private Viewport viewport;
	protected static Camera camera;

    // TODO: categorize better ?
    private HUD hud = new HUD();

// ---------- METHODS ----------

    private void clearScreen() {
        Gdx.gl.glClearColor(Color.BLACK.r, Color.BLACK.g, Color.BLACK.b, Color.BLACK.a);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    }

    private void update(float deltaTime) {
        SagittariusGame.update(deltaTime);
        hud.update();
        camera.position.set(WIDTH / 2, HEIGHT / 2, 0);
        camera.update();
    }

    @Override
    public void render(float deltaTime) {

        update(deltaTime);

        clearScreen();

        // ---------- batch ----------
        batch.setProjectionMatrix(camera.combined);
        batch.begin();

        // planets
        for (Planet planet : SagittariusGame.planetList) {
            planet.renderDebug(batch, font);
        }

        // moons
        for (Moon moon : SagittariusGame.moonList) {
            moon.renderDebug(batch, font);
        }
        
        // players
        for (Player player : SagittariusGame.playerList) {
            player.renderDebug(batch, font);
        }

        // arrows
        for (Arrow arrow : SagittariusGame.arrowList) {
            arrow.renderDebug(batch, font);
        }

        batch.end();

        // ---------- shapeRenderer ----------
        shapeRenderer.setProjectionMatrix(camera.combined);
        shapeRenderer.begin(ShapeRenderer.ShapeType.Line);

        // planets
        for (Planet planet : SagittariusGame.planetList) {
            planet.render(shapeRenderer);
        }

        // players
        for (Player player : SagittariusGame.playerList) {
            player.render(shapeRenderer);
        }

        // arrows
        for (Arrow arrow : SagittariusGame.arrowList) {
            arrow.render(shapeRenderer);
        }

        // moons
        for (Moon moon : SagittariusGame.moonList) {
            moon.render(shapeRenderer);
        }

        // float[] vertices = {100, 100, 200, 200, 1000, 500};
        // shapeRenderer.polyline(vertices);

        shapeRenderer.end();

        // HUD
        hud.render();

    }

    @Override
    public void show() {
        camera = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
        camera.position.set(WIDTH / 2, HEIGHT / 2, 0);
        camera.update();

        viewport = new FitViewport(WIDTH, HEIGHT, camera);

        shapeRenderer = new ShapeRenderer();
        batch = new SpriteBatch();
        font = new BitmapFont();
    }

	@Override
	public void resize(int width, int height) {
		viewport.update(width, height);
        camera.update();
        batch.setProjectionMatrix(camera.combined);
        shapeRenderer.setProjectionMatrix(camera.combined);
    }

    @Override
    public void dispose() {
        batch.dispose();
        font.dispose();
        shapeRenderer.dispose();
    }

}