/**

 * Copyright (c) 2010 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.debug.internal.launch;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.net.URI;

import java.net.URISyntaxException;

import org.chromium.debug.core.model.StackFrame;

import org.chromium.sdk.Script;

import org.eclipse.core.filesystem.EFS;

import org.eclipse.core.resources.IFile;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.IPath;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Path;

import org.eclipse.core.runtime.Status;

import org.eclipse.debug.core.model.ISourceLocator;

import org.eclipse.debug.core.model.IStackFrame;

import org.eclipse.debug.core.sourcelookup.AbstractSourceLookupDirector;

import org.eclipse.debug.core.sourcelookup.AbstractSourceLookupParticipant;

import org.eclipse.debug.core.sourcelookup.ISourceLookupDirector;

import org.eclipse.debug.core.sourcelookup.ISourceLookupParticipant;

import org.symbian.tools.wrttools.debug.internal.Activator;

import org.symbian.tools.wrttools.debug.internal.model.ResourceManager;

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

import org.symbian.tools.wrttools.previewer.http.WebappManager;

public final class WebApplicationSourceLocator extends AbstractSourceLookupDirector implements ISourceLocator,

        ISourceLookupDirector {

    public static final class WebApplicationSourceLookupParticipant extends AbstractSourceLookupParticipant {

        private final ResourceManager resourceManager;

        private final WebApplicationSourceLocator locator;

        public WebApplicationSourceLookupParticipant(WebApplicationSourceLocator locator,

                ResourceManager resourceManager) {

            this.locator = locator;

            this.resourceManager = resourceManager;

        }

        public String getSourceName(Object object) throws CoreException {

            Script script = null;

            if (object instanceof StackFrame) {

                script = ((StackFrame) object).getCallFrame().getScript();

            } else if (object instanceof Script) {

                script = (Script) object;

            } else {

                System.out.println("Source lookup request for " + object.getClass());

            }

            if (script != null) {

                IFile resource = resourceManager.getResource(script);

                if (resource != null) {

                    return resource.getProjectRelativePath().toString();

                } else {

                    return locator.fileUrl(script);

                }

            }

            return null;

        }

    }

    private final ResourceManager resourceManager;

    public WebApplicationSourceLocator(ResourceManager resourceManager) {

        this.resourceManager = resourceManager;

    }

    public String fileUrl(Script script) throws CoreException {

        String name = script.getName();

        try {

            URI uri = new URI(name);

            if ("http".equals(uri.getScheme()) && WebappManager.getHost().equals(uri.getHost())

                    && WebappManager.getPort() == uri.getPort()) {

                final IPath stateLocation = Activator.getDefault().getStateLocation();

                final IPath path = stateLocation.append("systemlibraries")

                        .append(new Path(uri.getPath()).lastSegment());

                final File file = path.toFile();

                file.getParentFile().mkdirs();

                final String source = script.getSource();

                final BufferedWriter writer = new BufferedWriter(new FileWriter(file));

                try {

                    writer.write(source);

                } finally {

                    writer.close();

                }

                return new Path(file.getParentFile().getName()).append(file.getName()).toString();

            }

        } catch (URISyntaxException e) {

            throw new RuntimeException(e);

        } catch (IOException e) {

            throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID,

                    "Cannot load web runtime system libraries", e));

        }

        return null;

    }

    public Object getSourceElement(IStackFrame stackFrame) {

		if (stackFrame instanceof StackFrame == false) {

			return null;

		}

		StackFrame jsStackFrame = (StackFrame) stackFrame;

		Script script = jsStackFrame.getCallFrame().getScript();

		if (script == null) {

			return null;

		}

		IFile resource = resourceManager.getResource(script);

		if (resource != null) {

			return resource;

		} else {

			File file = PreviewerPlugin.getDefault().getHttpPreviewer().getLocalFile(script.getName());

				try {

					return EFS.getStore(file.toURI());

				} catch (CoreException e) {

					Activator.log(e);

				}

			}

		}

		return null;

	}

    public void initializeParticipants() {

        addParticipants(new ISourceLookupParticipant[] { new WebApplicationSourceLookupParticipant(this,

                resourceManager) });

    }

}