package sagittarius.view;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.Input.Keys;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.scenes.scene2d.Group;

import sagittarius.SagittariusGame;
import sagittarius.model.*;

public class GameScreen extends BaseScreen implements InputProcessor {

// ---------- ATTRIBUTEs ----------

    public static BitmapFont fontDebug = new BitmapFont();

    // Cursors
    public static Vector2 screenCursor;
    private static Vector3 unprojectedCursor;
	public static Vector2 worldCursor;

    // Groups  // TODO: move this in SagittariusGame ?
    public static Group attractors;
    public static Group arrows;
    public static Group players;

    // turn system stuff
    public static int playerIndex;
    public static Player playerCurrent;

    // camera stuff
    private Vector3 mainCameraPosition;
    private final float speed = 0.05f;
    private final float ispeed = 1.0f - speed;
    private static Entity focus;

    // test
    private OrthographicCamera gameCam;

// ---------- METHODs ----------

    @Override
    public void initialize() {

        Gdx.input.setInputProcessor(this);

        // planets & moons
        attractors = new Group();

        Planet planet1 = new Planet(new Vector2(300, 200), 1000, 50, Color.BLUE);
        attractors.addActor(planet1);

        Planet planet2 = new Planet(new Vector2(1200, 700), 3000, 200, Color.ORANGE);
        attractors.addActor(planet2);

        Moon moon2_1 = new Moon(planet2, 100, 70, 500, Color.MAGENTA);
        attractors.addActor(moon2_1);

        Planet planet3 = new Planet(new Vector2(1500, 100), 1000, 70, Color.PINK);
        attractors.addActor(planet3);

        mainStage.addActor(attractors);

        // players
        players = new Group();

        Player player1 = new Player(planet1, Color.RED);
        players.addActor(player1);

        Player player2 = new Player(planet2, Color.WHITE);
        players.addActor(player2);

        Player player3 = new Player(moon2_1, Color.YELLOW);
        players.addActor(player3);

        mainStage.addActor(players);

        // arrows
        arrows = new Group();
        mainStage.addActor(arrows);

        // The one and only Bow
        Bow bow = new Bow(true);
        mainStage.addActor(bow);

        // others
        FPS fpsCounter = new FPS(uiStage);
        uiStage.addActor(fpsCounter);

        MouseInfo mouseInfo = new MouseInfo();
        uiStage.addActor(mouseInfo);

        mainStage.setDebugAll(SagittariusGame.debugMode);
        uiStage.setDebugAll(SagittariusGame.debugMode);

        // game turns
        playerIndex = 0;
        player1.setActive(true);
        playerCurrent = player1;

        // camera stuff
        mainCameraPosition = mainStage.getCamera().position;
        focus = playerCurrent;
        gameCam = ((OrthographicCamera) mainStage.getCamera());

    }

    @Override
    public void update(float dt) {

		screenCursor = new Vector2(Gdx.input.getX(), Gdx.input.getY()); // utiliser les trucs fournis par libGDX
	    unprojectedCursor = mainStage.getCamera().unproject(new Vector3(screenCursor, 0));
		worldCursor = new Vector2(unprojectedCursor.x, unprojectedCursor.y);

        if (players.getChildren().size <= 1) {
            SagittariusGame.setActiveScreen( new StartScreen() );
        }

        // camera zoom using keys
        if (Gdx.input.isKeyPressed( Keys.DOWN)) {
            gameCam.zoom += dt;
        }
        if (Gdx.input.isKeyPressed( Keys.UP)) {
            gameCam.zoom -= dt;
        }

        // clamp zoom 
        gameCam.zoom = MathUtils.clamp(gameCam.zoom, 1f, 3f);

        // camera follow focus
        mainCameraPosition.scl(ispeed);
        mainCameraPosition.add(new Vector3(focus.getPosition(), 0).scl(speed));

    }

    /**
     * Removes a Player from the Game.
     * 
     * @param player Player to remove from the active list.
     */
    public static void removePlayer(Player player) {
        player.setActive(false);
        int index = players.getChildren().indexOf(player, true);
        if (index < playerIndex) {
            players.removeActor(player);
            playerIndex++;
            playerIndex %= players.getChildren().size;
        } else if (index == playerIndex) {
            players.removeActor(player);
            playerIndex %= players.getChildren().size;
            playerCurrent = (Player) players.getChild(playerIndex);
            playerCurrent.setActive(true);
        } else {
            players.removeActor(player);
        }
    }

    /**
     * Used to allows the next Player in the list to play.
     */
    public static void nextPlayer() {
        playerCurrent.setActive(false);
        playerIndex++;
        playerIndex %= players.getChildren().size;
        playerCurrent = (Player) players.getChild(playerIndex);
        playerCurrent.setActive(true);
    }

    public static void setFocus(Entity entity) {
        focus = entity;
    }

// ---------- InputProcessor METHODs ----------

    @Override
    public boolean keyDown(int keycode) {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean keyUp(int keycode) {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean keyTyped(char character) {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean touchDown(int screenX, int screenY, int pointer, int button) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean touchUp(int screenX, int screenY, int pointer, int button) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean touchDragged(int screenX, int screenY, int pointer) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean mouseMoved(int screenX, int screenY) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean scrolled(float amountX, float amountY) {
        gameCam.zoom += 2 * amountY * Gdx.graphics.getDeltaTime();
        return false;
    }

}