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package io.lightlink.config;

/*
 * #%L
 * lightlink-core
 * %%
 * Copyright (C) 2015 Vitaliy Shevchuk
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */


import io.lightlink.translator.ScriptTranslator;
import io.lightlink.utils.Utils;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.servlet.ServletContext;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class ConfigManager {

    public static final String DEFAULT_ROOT_PACKAGE = "lightlink";

    private ServletContext servletContext;
    private String rootPackage;
    private ScriptTranslator translator = new ScriptTranslator();

    public ConfigManager() {
        this(DEFAULT_ROOT_PACKAGE);
    }

    public ConfigManager(String rootPackage) {
        this.rootPackage = rootPackage.replace('.', '/');
    }

    public ConfigManager(String rootPackage, ServletContext servletContext) {
        this(rootPackage);
        this.servletContext = servletContext;
    }

    public ConfigManager(ServletContext servletContext) {
        this();
        this.servletContext = servletContext;
    }

    public static ScriptEngine getScriptEngine() {
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("nashorn");
        if (engine==null){
            throw new IllegalStateException("Nashorn engine is not found. Please make sure you use Java 8 or higher OR " +
                    "to run on Java7 you need to add Nashorn backport jar to your webapp");
        }
        return engine;
    }

    public String getRootPackage() {
        return rootPackage;
    }


    public static boolean isInDebugMode() {
        return "true".equalsIgnoreCase(System.getProperty("lightlink.debug"));
    }

    public List