/*******************************************************************************

 * Copyright (c) 2009 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 *******************************************************************************/

package org.symbian.tools.wrttools.previewer.http;

import java.io.UnsupportedEncodingException;

import java.net.URI;

import java.net.URISyntaxException;

import java.net.URLDecoder;

import java.net.URLEncoder;

import java.util.Map;

import java.util.TreeMap;

import org.eclipse.core.resources.IProject;

import org.symbian.tools.wrttools.previewer.PreviewerPlugin;

public class WebAppInterface {

    private static WebAppInterface INSTANCE;

    public static void connectDebugger(String widget, String id, String sId) {

        if (PreviewerPlugin.TRACE_WEBAPP) {

            System.out.println("Connecting debugger");

        }

        getInstance().connect(widget, id, sId);

    }

    public static String decode(String value) {

        try {

            return URLDecoder.decode(value, "UTF-8");

        } catch (UnsupportedEncodingException e) {

            throw new RuntimeException(e);

        }

    }

    public static String encode(String project) {

        try {

            return URLEncoder.encode(project, "UTF-8");

        } catch (UnsupportedEncodingException e) {

            throw new RuntimeException(e);

        }

    }

    public static String getAjaxUri(String widget, String id) {

        if (PreviewerPlugin.TRACE_WEBAPP) {

            System.out.println("getAjaxUri");

        }

        return getInstance().createAjaxUri(widget, id).toASCIIString();

    }

    public synchronized static WebAppInterface getInstance() {

        if (INSTANCE == null) {

            INSTANCE = new WebAppInterface();

        }

        return INSTANCE;

    }

    public static String getUrl(String widget, String id) {

        return getInstance().complete(widget, id).toASCIIString();

    }

    public static boolean isConnected(String widget, String id) {

        if (PreviewerPlugin.TRACE_WEBAPP) {

            System.out.println("isConnected");

        }

        return getInstance().isJobComplete(widget, id);

    }

    public static boolean isSuccessful(String widget, String id) {

        if (PreviewerPlugin.TRACE_WEBAPP) {

            System.out.println("isSuccessful");

        }

        return getInstance().isConnectionSuccessful(widget, id);

    }

    private final Map<String, BrowserConnectionJob> debuggerJobs = new TreeMap<String, BrowserConnectionJob>();

    private WebAppInterface() {

        try {

            WebappManager.start("wrtbrowser");

        } catch (Exception e) {

            PreviewerPlugin.log(e);

        }

    }

    private synchronized URI complete(String widget, String id) {

        return WorkspaceResourcesServlet.getPreviewerStartingPage(widget);

    }

    private synchronized void connect(String widget, String id, String sId) {

        if (!isConnected(widget, id)) {

            BrowserConnectionJob listener = debuggerJobs.get(getId(widget, id));

            listener.setSessionId(sId);

            listener.schedule(250);

        }

    }

    private URI createAjaxUri(String widget, String id) {

        try {

            return createUri("connectionTest.jsp", widget, id);

        } catch (URISyntaxException e) {

            PreviewerPlugin.log(e);

            return null;

        }

    }

    private URI createUri(String page, String project, String session) throws URISyntaxException {

        URI uri = new URI("http", null, WebappManager.getHost(), WebappManager.getPort(), "/wrtdebugger/" + page,

                "widget=" + encode(project) + "&session=" + session, null);

        return uri;

    }

    private String getId(String name, String session) {

        return name + "$" + session;

    }

    private boolean isJobComplete(String widget, String id) {

        BrowserConnectionJob job = debuggerJobs.get(getId(widget, id));

        return job.isReady();

    }

    private boolean isConnectionSuccessful(String widget, String id) {

        BrowserConnectionJob job = debuggerJobs.get(getId(widget, id));

        return job.isSuccess();

    }

    public synchronized URI prepareDebugger(IProject project, IPreviewStartupListener listener) {

        String session = Long.toHexString(System.currentTimeMillis());

        if (listener != null) {

            debuggerJobs.put(getId(project.getName(), session), new BrowserConnectionJob(listener, uri));

        }

        return uri;

    }

}