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Classic point and click adventure game engine
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/*******************************************************************************
 * Copyright 2014 Rafael Garcia Moreno.
 *
 * 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 com.bladecoder.engine;

import com.badlogic.gdx.Application;
import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.utils.BufferUtils;
import com.bladecoder.engine.assets.EngineAssetManager;
import com.bladecoder.engine.model.World;
import com.bladecoder.engine.ui.UI;
import com.bladecoder.engine.util.Config;
import com.bladecoder.engine.util.DPIUtils;
import com.bladecoder.engine.util.EngineLogger;

import java.io.IOException;
import java.nio.IntBuffer;
import java.text.MessageFormat;

public class BladeEngine implements ApplicationListener {

    private String chapter;
    private String gameState;
    private String testScene;
    private String recordName;
    private String forceRes;
    private boolean debug = false;
    private boolean restart = false;
    private UI ui;
    private World world;

    public static UI getAppUI() {
        return ((BladeEngine) Gdx.app.getApplicationListener()).getUI();
    }

    public void setTestMode(String s) {
        testScene = s;
    }

    public void loadGameState(String s) {
        gameState = s;
    }

    public void setPlayMode(String recordName) {
        this.recordName = recordName;
    }

    public void setDebugMode() {
        debug = true;
    }

    public void setRestart() {
        restart = true;
    }

    public void setChapter(String chapter) {
        this.chapter = chapter;
    }

    public void forceResolution(String forceRes) {
        this.forceRes = forceRes;
    }

    public UI getUI() {
        return ui;
    }

    public void loadGame(String baseFolder) {
        if (ui != null) {
            ui.dispose();
            world.dispose();
        }

        world = new World();

        EngineAssetManager.setAssetFolder(baseFolder);
        Config.getInstance().load();

        try {
            world.loadWorldDesc();
        } catch (Exception e) {
            // dispose();
            EngineLogger.error("EXITING: " + e.getMessage());
            Gdx.app.exit();
        }

        ui = new UI(world);
    }

    @Override
    public void create() {
        if (!debug)
            debug = Config.getInstance().getProperty(Config.DEBUG_PROP, debug);

        if (debug)
            EngineLogger.setDebug();
        else
            EngineLogger.setDebugLevel(Application.LOG_ERROR);

        EngineLogger.debug("GAME CREATE");

        if (forceRes == null)
            forceRes = Config.getInstance().getProperty(Config.FORCE_RES_PROP, forceRes);

        if (forceRes != null) {
            EngineAssetManager.getInstance().forceResolution(forceRes);
        }

        loadGame(null);

        if (EngineLogger.debugMode()) {
            if (chapter == null)
                chapter = Config.getInstance().getProperty(Config.CHAPTER_PROP, chapter);

            if (testScene == null) {
                testScene = Config.getInstance().getProperty(Config.TEST_SCENE_PROP, testScene);
            }

            if (testScene != null || chapter != null) {
                try {
                    world.loadChapter(chapter, testScene, true);
                } catch (Exception e) {
                    dispose();
                    EngineLogger.error("Error loading model:" + e.getMessage(), e);
                    Gdx.app.exit();
                }

                ui.setCurrentScreen(UI.Screens.SCENE_SCREEN);
            }

            if (gameState == null)
                gameState = Config.getInstance().getProperty(Config.LOAD_GAMESTATE_PROP, gameState);

            if (gameState != null) {
                try {
                    world.loadGameState(gameState);
                } catch (IOException e) {
                    EngineLogger.error(e.getMessage());
                }
            }

            if (restart) {
                try {
                    world.getSerializer().loadChapter();

                    ui.setCurrentScreen(UI.Screens.SCENE_SCREEN);
                } catch (Exception e) {
                    EngineLogger.error("ERROR LOADING GAME", e);
                    dispose();
                    Gdx.app.exit();
                }
            }

            if (recordName == null)
                recordName = Config.getInstance().getProperty(Config.PLAY_RECORD_PROP, recordName);

            if (recordName != null) {
                ui.getRecorder().setFilename(recordName);
                ui.getRecorder().load();
                ui.getRecorder().setPlaying(true);

                ui.setCurrentScreen(UI.Screens.SCENE_SCREEN);
            }
        }

        IntBuffer size = BufferUtils.newIntBuffer(16);
        Gdx.gl.glGetIntegerv(GL20.GL_MAX_TEXTURE_SIZE, size);
        int maxSize = size.get();

        EngineLogger.debug("Max. texture Size: " + maxSize);
        EngineLogger.debug("Density: " + Gdx.graphics.getDensity());
        EngineLogger.debug("Dimensions: " + Gdx.graphics.getWidth() + "x" + Gdx.graphics.getHeight());
        EngineLogger.debug("Size Multiplier: " + DPIUtils.getSizeMultiplier());
    }

    @Override
    public void dispose() {
        EngineLogger.debug("GAME DISPOSE");
        world.dispose();
        ui.dispose();
    }

    @Override
    public void render() {
        ui.render();

        // Pause the game when an error is found in debug mode
        if (EngineLogger.lastError != null && EngineLogger.debugMode() && !world.isPaused()) {
            pause();
        }
    }

    @Override
    public void resize(int width, int height) {
        EngineLogger.debug(MessageFormat.format("GAME RESIZE {0}x{1}", width, height));

        if (ui != null)
            ui.resize(width, height);
    }

    @Override
    public void pause() {
        boolean bot = ui.getTesterBot().isEnabled();
        boolean r = ui.getRecorder().isPlaying();

        if (!world.isDisposed() && ((!bot && !r) || EngineLogger.lastError != null)) {
            EngineLogger.debug("GAME PAUSE");
            ui.pause();
            try {
                world.saveGameState();
            } catch (IOException e) {
                EngineLogger.error(e.getMessage());
            }
        } else {
            EngineLogger.debug("NOT PAUSING WHEN BOT IS RUNNING OR PLAYING RECORDED GAME");
        }
    }

    @Override
    public void resume() {
        EngineLogger.debug("GAME RESUME");
        resize(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
        ui.resume();
    }

}