/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package com.nokia.s60tools.apiquery.cache.core.job;

import java.io.FileNotFoundException;

import java.io.IOException;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Platform;

import org.eclipse.core.runtime.Status;

import org.eclipse.core.runtime.jobs.Job;

import com.nokia.s60tools.apiquery.cache.configuration.CacheEntryStorage;

import com.nokia.s60tools.apiquery.cache.resources.Messages;

import com.nokia.s60tools.apiquery.cache.searchmethod.ui.LocalCacheUIComposite;

import com.nokia.s60tools.apiquery.shared.datatypes.config.IConfigurationChangedListener;

import com.nokia.s60tools.apiquery.shared.job.AbstractJob;

import com.nokia.s60tools.apiquery.shared.job.JobCancelledByUserException;

import com.nokia.s60tools.apiquery.ui.views.main.MainView;

import com.nokia.s60tools.sdk.SdkInformation;

/**

 * Job for loading already seeked SDK data to RAM

 */

public class UpdateSDKSelectionJob extends AbstractJob {

	private final SdkInformation info;

	private boolean showErrorDialog = true;

	/**

	 * Constructor

	 * @param name

	 * @param info

	 */

	public UpdateSDKSelectionJob(String name, SdkInformation info) {

		super(name);

		this.info = info;

		setUser(true);

	}

	/**

	 * Constructor

	 * @param name

	 * @param info

	 * @param showErrorDialog set <code>false</code> if dont want to show error dialog when there was errors 

	 * when updating cache. 

	 */

	public UpdateSDKSelectionJob(String name, SdkInformation info, boolean showErrorDialog) {

		super(name);

		this.info = info;

		setUser(true);

		this.showErrorDialog = showErrorDialog;

	}	

	/**

	 * Check if job is allready running

	 * @return true if job with same name is allready running

	 */

	public boolean isAllreadyRunning(){

		//Get and check all jobs

		Job[] jobs = getJobManager().find(null);

		for (int i = 0; i < jobs.length; i++) {

			if(jobs[i] instanceof UpdateSDKSelectionJob){

				UpdateSDKSelectionJob job = (UpdateSDKSelectionJob)jobs[i];

				//If we found job what is not this job, and it runs for same SDK (same name)

				//then there is job allready runnig to update this SDK

				if(!job.equals(this) && job.getName().equals(this.getName())){

					return true;

				}

			}

		}

		return false;

	}

	/* (non-Javadoc)

	 * @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor)

	 */

	protected IStatus run(IProgressMonitor monitor) {

		MainView.enablePropTabcontents(false);

		//Check if Update is already ongoing, returning warning if is.

		if(isAllreadyRunning()){

			IStatus status = new Status(

					Status.WARNING,Platform.PI_RUNTIME,

					Status.WARNING, "Job: '" +getName() +"' already runnig.", null);			

			return status;

		}		

		setMonitor(monitor);

		try{

			reportStartTime();

			updateDataStore();

			reportEndTime();

			return Status.OK_STATUS;

		}catch (JobCancelledByUserException e) {			

			return Status.CANCEL_STATUS;

		}catch (Exception e) {

			e.printStackTrace();

			return returnErrorStatus(e);

		}		

		finally{

			MainView.enablePropTabcontents(true);

		}

	}

	/**

	 * Return error status

	 * @param e

	 * @return

	 */

	private IStatus returnErrorStatus(Exception e){

		String msg = Messages.getString("UpdateSDKSelectionJob.SDKReadError_Msg") +info.getSdkId() +"'";	 //$NON-NLS-1$ //$NON-NLS-2$

		IStatus status = new Status(

				Status.ERROR,Platform.PI_RUNTIME,

				Status.ERROR,msg, e);

		return status;			

	}

	/**

	 * When known that data source allready found (files seeked under SDK) just

	 * updating datastore selections so that selected SDK is selected.

	 * 

	 * @throws IOException

	 * @throws FileNotFoundException

	 * @throws JobCancelledByUserException 

	 */

	private void updateDataStore() throws FileNotFoundException, IOException, JobCancelledByUserException {

		getMonitor().beginTask(

				Messages.getString("UpdateSDKSelectionJob.ReadingSDK_ProgressMsg") + info.getSdkId() + "'", //$NON-NLS-1$ //$NON-NLS-2$

				IProgressMonitor.UNKNOWN); 

		CacheEntryStorage storage = CacheEntryStorage.getInstance();

		getMonitor().subTask(Messages.getString("UpdateSDKSelectionJob.ParsingFiles_ProgressMsg")); //$NON-NLS-1$

		// Cancel situations will throw exception and restore old data

		storage.selectSDKAndLoadAllSelectedDatasToMemory(getMonitor(), info);

		// Notifying listeners, only one notifying should be enough.

		storage.notifyConfigurationChangeListeners(IConfigurationChangedListener.ALL_ENTRYS_UPDATED);

		// Show error message or write to log if there is some errors on load.

		if (storage.isLoadErros()) {

			if (showErrorDialog) {

				JobMessageUtils.showLoadErrorDialog();

			} else {

				JobMessageUtils.printLoadErrorMessage();

			}

		}

	}

}