/*******************************************************************************
 * Signavio Core Components
 * Copyright (C) 2012  Signavio GmbH
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package com.signavio.warehouse.business.util.jpdl4;

import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

public class JpdlToJson {
    private static Process process;

    public static String transform(Document doc) {
        // trigger for transformation
        Node root = getRootNode(doc);
        if (root == null)
            return "";

        process = new Process(root);
        process.createTransitions();

        try {
            return process.toJson();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return "";

    }

    public static JSONObject createJsonObject(String uuid, JSONObject stencil,
            JSONArray outgoing, JSONObject properties, JSONArray childShapes,
            JSONObject bounds) throws JSONException {
        // create Oryx compliant JSONObject for Node
        JSONObject node = new JSONObject();

        node.put("bounds", bounds);
        node.put("resourceId", uuid);
        node.put("stencil", stencil);
        node.put("outgoing", outgoing);
        node.put("properties", properties);
        node.put("childShapes", childShapes);
        return node;
    }

    private static Node getRootNode(Document doc) {
        Node node = doc.getDocumentElement();
        if (node == null || !node.getNodeName().equals("process"))
            return null;
        return node;
    }

    public static Bounds getBounds(Node node) {
        if (node != null) {
            String bounds = node.getNodeValue();
            return new Bounds(bounds.split(","));
        } else {
            return new Bounds();
        }
    }

    public static String getAttribute(NamedNodeMap attributes, String name) {
        if(attributes.getNamedItem(name) != null)
            return attributes.getNamedItem(name).getNodeValue();
        return null;
    }

    public static Process getProcess() {
        return process;
    }

    public static JSONArray getTransitions(List<Transition> outgoings) throws JSONException {
        JSONArray outgoing = new JSONArray();

        for(Transition t : outgoings) {
            JSONObject tt = new JSONObject();
            tt.put("resourceId", t.getUuid());
            outgoing.put(tt);
        }
        return outgoing;
    }
}
