/*
 * Copyright 2017 MovingBlocks
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.terasology.logic.players;

import org.terasology.utilities.Assets;
import org.terasology.audio.AudioManager;
import org.terasology.entitySystem.entity.EntityRef;
import org.terasology.entitySystem.event.ReceiveEvent;
import org.terasology.entitySystem.systems.BaseComponentSystem;
import org.terasology.entitySystem.systems.RegisterMode;
import org.terasology.entitySystem.systems.RegisterSystem;
import org.terasology.input.ButtonState;
import org.terasology.input.binds.general.OnlinePlayersButton;
import org.terasology.input.binds.general.PauseButton;
import org.terasology.input.binds.general.ScreenshotButton;
import org.terasology.logic.characters.events.DeathEvent;
import org.terasology.network.ClientComponent;
import org.terasology.registry.CoreRegistry;
import org.terasology.registry.In;
import org.terasology.rendering.nui.NUIManager;
import org.terasology.rendering.nui.layers.ingame.OnlinePlayersOverlay;
import org.terasology.rendering.opengl.ScreenGrabber;

@RegisterSystem(RegisterMode.CLIENT)
public class MenuControlSystem extends BaseComponentSystem {

    @In
    private NUIManager nuiManager;

    @Override
    public void initialise() {
        nuiManager.getHUD().addHUDElement("dropItemRegion");  //Ensure the drop region is behind the toolbar
        nuiManager.getHUD().addHUDElement("toolbar");
    }

    @ReceiveEvent(components = ClientComponent.class)
    public void onTogglePause(PauseButton event, EntityRef entity) {
        if (event.getState() == ButtonState.DOWN) {
            nuiManager.toggleScreen("engine:pauseMenu");
            event.consume();
        }
    }

    @ReceiveEvent(components = ClientComponent.class)
    public void onScreenshotCapture(ScreenshotButton event, EntityRef entity) {
        if (event.getState() == ButtonState.DOWN) {
            CoreRegistry.get(ScreenGrabber.class).takeScreenshot();
            CoreRegistry.get(AudioManager.class).playSound(Assets.getSound("engine:camera").get());
            event.consume();
        }
    }

    @ReceiveEvent(components = {ClientComponent.class})
    public void onDeath(DeathEvent event, EntityRef entity) {
        if (entity.getComponent(ClientComponent.class).local) {
            nuiManager.pushScreen("engine:deathScreen");
        }
    }

    @ReceiveEvent(components = ClientComponent.class)
    public void onShowOnlinePlayers(OnlinePlayersButton event, EntityRef entity) {
        boolean show = event.isDown();
        String onlinePlayersOverlay = "engine:onlinePlayersOverlay";

        if (show) {
            nuiManager.addOverlay(onlinePlayersOverlay, OnlinePlayersOverlay.class);
        } else {
            nuiManager.removeOverlay(onlinePlayersOverlay);
        }
        event.consume();
    }

}