/**********************************************************************
 * Copyright (c) 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors:
 *    IBM - Initial API and implementation
 **********************************************************************/
package net.sourceforge.phpdt.monitor.ui.internal.viewers;

import net.sourceforge.phpdt.monitor.core.IRequest;
import net.sourceforge.phpdt.monitor.core.MonitorCore;
import net.sourceforge.phpdt.monitor.ui.internal.ContextIds;
import net.sourceforge.phpdt.monitor.ui.internal.MonitorUIPlugin;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.help.WorkbenchHelp;

/**
 * An transport (header) viewer.
 */
public class HeaderViewer {
	protected boolean displayHeader;

	protected Composite headerComp;
	protected Composite innerComp;
	protected Composite rootComp;

	protected Label headerLabel;
	protected Text headerText;
	protected IRequest rr;
	protected byte msg;
	protected GridLayout layout;
	protected GridData data;

	protected boolean hidden;

	protected static int HEADER_LABEL_SIZE = 15;
	protected static int HEADER_TEXT_SIZE = 110;
	public static byte REQUEST_HEADER = 0;
	public static byte RESPONSE_HEADER = 1;

	public HeaderViewer(Composite parent, byte message) {
		rootComp = parent;
		displayHeader = true;
		hidden = false;
		
		headerComp = new Composite(parent, SWT.NONE);
		layout = new GridLayout();
		layout.numColumns = 1;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		headerComp.setLayout(layout);
		data = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING);
		headerComp.setLayoutData(data);

		innerComp = new Composite(headerComp, SWT.NONE);
		layout = new GridLayout();
		layout.numColumns = 1;
		layout.marginHeight = 0;
		layout.marginWidth = 2;
		innerComp.setLayout(layout);
		data = new GridData(GridData.FILL_BOTH);
		data.heightHint = HEADER_LABEL_SIZE;
		innerComp.setLayoutData(data);

		rr = null;
		msg = message;

		setDisplayHeader(false);
	}
	
	/*public boolean isHidden() {
		return hidden;
	}*/
	
	/*public void hideViewer() {
		hidden = true;
		innerComp.dispose();
		data = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING);
		data.heightHint = 0;
		headerComp.setLayoutData(data);	
		rootComp.layout(true);
	}
	
	public void showViewer() {
		hidden = false;
		
		innerComp = new Composite(headerComp, SWT.NONE);
		layout = new GridLayout();
		layout.numColumns = 1;
		layout.marginHeight = 0;
		layout.marginWidth = 2;
		innerComp.setLayout(layout);
		data = new GridData(GridData.FILL_BOTH);
		data.heightHint = HEADER_LABEL_SIZE;
		innerComp.setLayoutData(data);
		
		displayHeader = true;
		setDisplayHeader(false);
	}*/
	
	public void setRequestResponse(IRequest reqresp) {
		rr = reqresp;
		if (!hidden)
			getView();
	}
	
	public void setDisplayHeader(boolean b) {
		if (displayHeader != b) {
			displayHeader = b;
			if (displayHeader) {
				innerComp.dispose();

				data = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING);
				data.heightHint = HEADER_TEXT_SIZE;
				headerComp.setLayoutData(data);
								
				innerComp = new Composite(headerComp, SWT.NONE);
				layout = new GridLayout();
				layout.numColumns = 1;
				layout.marginHeight = 0;
				layout.marginWidth = 0;
				innerComp.setLayout(layout);
				data = new GridData(GridData.FILL_BOTH);
				data.heightHint = HEADER_TEXT_SIZE;
				innerComp.setLayoutData(data);
								
				headerText = new Text(innerComp, SWT.BORDER | SWT.MULTI | SWT.READ_ONLY | SWT.H_SCROLL | SWT.V_SCROLL);
				Display display = innerComp.getDisplay();
				headerText.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND));
				headerText.setForeground(display.getSystemColor(SWT.COLOR_LIST_FOREGROUND));
				headerText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.FILL_VERTICAL));
				headerText.setFont(JFaceResources.getTextFont());
				WorkbenchHelp.setHelp(headerText, ContextIds.VIEW_RESPONSE);

				rootComp.layout(true);
			} else {
				innerComp.dispose();

				data = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING);
				data.heightHint = HEADER_LABEL_SIZE;
				headerComp.setLayoutData(data);
				
				innerComp = new Composite(headerComp, SWT.NONE);
				layout = new GridLayout();
				layout.numColumns = 1;
				layout.marginHeight = 0;
				layout.marginWidth = 2;
				innerComp.setLayout(layout);
				data = new GridData(GridData.FILL_BOTH);
				data.heightHint = HEADER_LABEL_SIZE;
				innerComp.setLayoutData(data);

				headerLabel = new Label(innerComp, SWT.NONE);
				headerLabel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING));
				
				rootComp.layout(true);
			}
		}
		getView();
	}

	/*public boolean getDisplayHeader() {
		return displayHeader;
	}*/

	private void getView() {
		String out = "";
		if (rr != null) {
			if (msg == REQUEST_HEADER) {
				out = MonitorCore.parse(rr.getRequest(IRequest.TRANSPORT));
			} else if (msg == RESPONSE_HEADER) {
				out = MonitorCore.parse(rr.getResponse(IRequest.TRANSPORT));
			}
		}
		
		if (displayHeader) {
			headerText.setText(out);
		} else {
			String lineSeparator = System.getProperty("line.separator");
			int index = out.indexOf(lineSeparator);
			if(index > 0)
				headerLabel.setText(MonitorUIPlugin.getResource("%headerLabel") + ": " + out.substring(0, index));
			else 
				headerLabel.setText(MonitorUIPlugin.getResource("%headerLabel") + ":  " + out);
		}
	}

	public void dispose() {
		headerComp.dispose();
	}
}