/*
 * Copyright (c) 2006-2017 DMDirc Developers
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
 * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.dmdirc.addons.scriptplugin;

import com.dmdirc.plugins.PluginInfo;
import com.dmdirc.plugins.implementations.BaseCommandPlugin;
import com.dmdirc.util.validators.ValidationResponse;

import javax.script.ScriptEngineManager;

import dagger.ObjectGraph;

/**
 * This allows javascript scripts to be used in DMDirc.
 */
public class ScriptPlugin extends BaseCommandPlugin {

    private ScriptPluginManager scriptPluginManager;

    @Override
    public void load(final PluginInfo pluginInfo, final ObjectGraph graph) {
        super.load(pluginInfo, graph);

        setObjectGraph(graph.plus(new ScriptModule(pluginInfo)));
        registerCommand(ScriptCommand.class, ScriptCommand.INFO);

        scriptPluginManager = getObjectGraph().get(ScriptPluginManager.class);
    }

    @Override
    public void onLoad() {
        scriptPluginManager.onLoad();
        super.onLoad();
    }

    @Override
    public void onUnload() {
        scriptPluginManager.onUnLoad();
        super.onUnload();
    }

    @Override
    public ValidationResponse checkPrerequisites() {
        if (new ScriptEngineManager().getEngineByName("JavaScript") == null) {
            return new ValidationResponse("JavaScript Scripting Engine not found.");
        } else {
            return new ValidationResponse();
        }
    }

    /**
     * Get the reason for checkPrerequisites failing.
     *
     * @return Human-Readable reason for checkPrerequisites failing.
     */
    public String checkPrerequisitesReason() {
        if (new ScriptEngineManager().getEngineByName("JavaScript") == null) {
            return "JavaScript Scripting Engine not found.";
        } else {
            return "";
        }
    }

}