/*******************************************************************************
 * Copyright (c) 2011, 2012 Ericsson AB and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Ericsson AB - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.reviews.r4e.mail.smtp.mailVersion.internal.dialogs;

import java.text.SimpleDateFormat;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.IInputValidator;
import org.eclipse.jface.window.Window;
import org.eclipse.mylyn.reviews.r4e.mail.smtp.SmtpPlugin;
import org.eclipse.mylyn.reviews.r4e.mail.smtp.mailVersion.internal.MailInputValidator;
import org.eclipse.mylyn.reviews.r4e.mail.smtp.mailVersion.internal.SMTPHostString;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.forms.FormDialog;
import org.eclipse.ui.forms.IManagedForm;
import org.eclipse.ui.forms.events.ExpansionAdapter;
import org.eclipse.ui.forms.events.ExpansionEvent;
import org.eclipse.ui.forms.widgets.ExpandableComposite;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.ui.forms.widgets.ScrolledForm;
import org.eclipse.ui.forms.widgets.Section;

/**
 * This class implements the dialog used to fill in the meeting request information
 * @author Sebastien Dubois
 * @version $Revision: 1.0 $
 */
public class ScheduleMeetingInputDialog extends FormDialog {

	// ------------------------------------------------------------------------
	// Constants
	// ------------------------------------------------------------------------
	
	/**
	 * Field MEETING_DIALOG_TITLE.
	 * (value is ""Meeting Information"")
	 */
	private static final String MEETING_DIALOG_TITLE = "Meeting Information";

	/**
	 * Field BASIC_PARAMS_HEADER_MSG.
	 * (value is ""Enter Meeting Information"")
	 */
	private static final String BASIC_PARAMS_HEADER_MSG = "Enter Meeting Information";

	/**
	 * Field SIMPLE_DATE_FORMAT.
	 * (value is ""yyyy/MM/dd"")
	 */
	public static final String SIMPLE_DATE_FORMAT = "yyyy-MMM-dd HH:mm";

	
	// ------------------------------------------------------------------------
	// Member variables
	// ------------------------------------------------------------------------
	
	/**
	 * Field fStartTime.
	 */
    protected Long fStartTime = null;
    
	/**
	 * Field fCalendarButton.
	 */
	protected Button fCalendarButton = null;
	
	/**
	 * Field fDuration.
	 */
    private Integer fDuration = null;
    
	/**
	 * Field fLocation.
	 */
    private String fLocation = null;
    
	/**
	 * Field fStartTimeInputTextField.
	 */
    protected Text fStartTimeInputTextField = null;
    
	/**
	 * Field fDurationInputTextField.
	 */
    private Text fDurationInputTextField = null;
    
	/**
	 * Field fLocationInputTextField.
	 */
    private Text fLocationInputTextField = null;
    
    /**
     * The input validator, or <code>null</code> if none.
     */
    private final IInputValidator fValidator;
    
    
	// ------------------------------------------------------------------------
	// Constructors
	// ------------------------------------------------------------------------
    
	/**
	 * Constructor for ScheduleMeetingInputDialog.
	 * @param aParentShell Shell
	 */
	public ScheduleMeetingInputDialog(Shell aParentShell) {
		super(aParentShell);
		setBlockOnOpen(true);
		fValidator = new MailInputValidator();
	}
	
	
	// ------------------------------------------------------------------------
	// Methods
	// ------------------------------------------------------------------------

    /**
     * Method buttonPressed.
     * @param buttonId int
     * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int)
     */
	@Override
	protected void buttonPressed(int buttonId) {
        if (buttonId == IDialogConstants.OK_ID) {
        	
        	//NOTE fStartTime is set below
        	//Validate StartTime
        	String validateResult = validateEmptyInput(fDurationInputTextField);
        	if (null != validateResult) {
        		
        		//Validation of input failed
    			final ErrorDialog dialog = new ErrorDialog(null, 
    					SMTPHostString.getString("dialog_title_error"), 
    					SMTPHostString.getString("duration_Error"),
        				new Status(IStatus.ERROR, 
        						SmtpPlugin.FPLUGIN_ID, 0, validateResult, null), IStatus.ERROR);
    			dialog.open();
    			this.getShell().setCursor(this.getShell().getDisplay().getSystemCursor(SWT.CURSOR_ARROW));
    			return;
        	}
        	fDuration = Integer.valueOf(fDurationInputTextField.getText());
        	
        	//Validate Location
        	validateResult = validateEmptyInput(fLocationInputTextField);
        	if (null != validateResult) {
        		//Validation of input failed
    			final ErrorDialog dialog = new ErrorDialog(null, 
    					SMTPHostString.getString("dialog_title_error"),
    					SMTPHostString.getString("location_Error"),
        				new Status(IStatus.ERROR, 
        						SmtpPlugin.FPLUGIN_ID, 0, validateResult, null), IStatus.ERROR);
    			dialog.open();
    			this.getShell().setCursor(this.getShell().getDisplay().getSystemCursor(SWT.CURSOR_ARROW));
    			return;
        	}
        	fLocation = fLocationInputTextField.getText();   	
         } else {
        	 fStartTime = null;
        	 fDuration = null;
        	 fLocation = null;
        }
		this.getShell().setCursor(this.getShell().getDisplay().getSystemCursor(SWT.CURSOR_ARROW));
        super.buttonPressed(buttonId);
    }
    
    /**
     * Method configureShell.
     * @param shell Shell
     * @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell)
     */
    @Override
	protected void configureShell(Shell shell) {
        super.configureShell(shell);
        shell.setText(MEETING_DIALOG_TITLE);
    }
    
	/**
	 * Configures the dialog form and creates form content. Clients should
	 * override this method.
	 * 
	 * @param mform
	 *            the dialog form
	 */
	@Override
	protected void createFormContent(final IManagedForm mform) {

		final FormToolkit toolkit = mform.getToolkit();
		final ScrolledForm sform = mform.getForm();
		sform.setExpandVertical(true);
		final Composite composite = sform.getBody();
		final GridLayout layout = new GridLayout(1, false);
		composite.setLayout(layout);
        
		//Basic parameters section
        final Section basicSection = toolkit.createSection(composite, Section.DESCRIPTION | ExpandableComposite.TITLE_BAR |
        		  ExpandableComposite.TWISTIE | ExpandableComposite.EXPANDED);
        final GridData basicSectionGridData = new GridData(GridData.FILL, GridData.FILL, true, false);
        basicSectionGridData.horizontalSpan = 4;
        basicSection.setLayoutData(basicSectionGridData);
        
        
        basicSection.setText(SMTPHostString.getString("basic_parameter"));
        basicSection.setDescription(BASIC_PARAMS_HEADER_MSG);
        basicSection.addExpansionListener(new ExpansionAdapter()
		{
			@Override
			public void expansionStateChanged(ExpansionEvent e){
				getShell().setSize(getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT));
			}
		});
        final Composite basicSectionClient = toolkit.createComposite(basicSection);
        basicSectionClient.setLayout(layout);
        basicSection.setClient(basicSectionClient);
        
	    //Meeting composite
        final Composite meetingComposite = toolkit.createComposite(basicSectionClient);
	    GridData textGridData = new GridData(GridData.FILL, GridData.FILL, true, true);
		textGridData.horizontalSpan = 3;
		meetingComposite.setLayoutData(textGridData);
		meetingComposite.setLayout(new GridLayout(4, false));
		
		//Meeting Start Time
	    final Label meetingStartTimeLabel = toolkit.createLabel(meetingComposite, 
	    		SMTPHostString.getString("start_time_label"));
	    meetingStartTimeLabel.setLayoutData(new GridData(GridData.BEGINNING, GridData.BEGINNING, false, false));
	    fStartTimeInputTextField = toolkit.createText(meetingComposite, "", SWT.BORDER);
	    textGridData = new GridData(GridData.FILL, GridData.FILL, false, false);
	    textGridData.horizontalSpan = 2;
	    fStartTimeInputTextField.setLayoutData(textGridData);
	    
	    //Calendar Button
	    fCalendarButton = toolkit.createButton(meetingComposite, "...", SWT.NONE);
	    fCalendarButton.setLayoutData(new GridData(GridData.FILL, GridData.FILL, false, false));
	    fCalendarButton.addSelectionListener(new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
//				final CalendarDialog dialog = new CalendarDialog(R4EUIModelController.getNavigatorView().
//						getSite().getWorkbenchWindow().getShell(), true);
				final CalendarDialog dialog = new CalendarDialog(getShell(), true);
		    	final int result = dialog.open();
		    	if (result == Window.OK) {
		    		final SimpleDateFormat dateFormat = new SimpleDateFormat(SIMPLE_DATE_FORMAT);	
		    		fStartTimeInputTextField.setText(dateFormat.format(dialog.getDate()));
		    		fStartTime = Long.valueOf(dialog.getDate().getTime());
					getShell().setSize(getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT));
		    	}
			}
			public void widgetDefaultSelected(SelectionEvent e) { // $codepro.audit.disable emptyMethod
				// No implementation needed
			}
		});
	    
		//Meeting Duration
	    final Label meetingEndTimeLabel = toolkit.createLabel(meetingComposite, SMTPHostString.getString("duration_label") );
	    meetingEndTimeLabel.setLayoutData(new GridData(GridData.BEGINNING, GridData.BEGINNING, false, false));
	    fDurationInputTextField = toolkit.createText(meetingComposite, "", SWT.BORDER);
	    textGridData = new GridData(GridData.FILL, GridData.FILL, false, false);
	    textGridData.horizontalSpan = 2;
	    fDurationInputTextField.setLayoutData(textGridData);
	    toolkit.createLabel(meetingComposite, "");  //dummy label for alignment purposes

		//Meeting Location
	    final Label meetingLocationLabel = toolkit.createLabel(meetingComposite,
	    		SMTPHostString.getString("location_label"));
	    meetingLocationLabel.setLayoutData(new GridData(GridData.BEGINNING, GridData.BEGINNING, false, false));
	    fLocationInputTextField = toolkit.createText(meetingComposite, "", SWT.BORDER);
	    textGridData = new GridData(GridData.FILL, GridData.FILL, true, false);
	    textGridData.horizontalSpan = 2;
	    fLocationInputTextField.setLayoutData(textGridData);
	    toolkit.createLabel(meetingComposite, "");  //dummy label for alignment purposes
    }
    
	/**
	 * Method isResizable.
	 * @return boolean
	 */
	@Override
	protected boolean isResizable() {
		return true;
	}
    
    /**
     * Method getStartTime
     * @return Long
     */
    public Long getStartTime() {
        return fStartTime;
    }
    
    /**
     * Method getDuration
     * @return Integer
     */
    public Integer getDuration() {
        return fDuration;
    }
    
    /**
     * Method getLocation
     * @return String
     */
    public String getLocation() {
        return fLocation;
    }
    
    /**
     * Method validateEmptyInput.
     * @param aText Text
     * @return String
     */
    private String validateEmptyInput(Text aText) {
        if (null != fValidator) {
            return fValidator.isValid(aText.getText());
        }
        return null;
    }
    
    /**
     * Method setStartTime
     * @param aSt Long
     */
    public void setStartTime(Long aSt) {
		final SimpleDateFormat dateFormat = new SimpleDateFormat(SIMPLE_DATE_FORMAT);	
		fStartTimeInputTextField.setText(dateFormat.format(aSt));
		fStartTime = aSt;
    }
    
    /**
     * Method setDuration
     * @param aDuration Long
     */
    public void setDuration(Integer aDuration) {
    	fDurationInputTextField.setText(aDuration.toString());
    }
    
    /**
     * Method setLocation
     * @param aLoc String
     */
    public void setLocation(String aLoc) {
    	fLocationInputTextField.setText(aLoc);
    }

}