/**********************************************************************
 * 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.view;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import net.sourceforge.phpdt.monitor.core.IContentFilter;
import net.sourceforge.phpdt.monitor.core.IRequest;
import net.sourceforge.phpdt.monitor.ui.IContentViewer;
import net.sourceforge.phpdt.monitor.ui.internal.MonitorUIPlugin;
import net.sourceforge.phpdt.monitor.ui.internal.Trace;
import net.sourceforge.phpdt.monitor.ui.internal.viewers.ByteViewer;
import net.sourceforge.phpdt.monitor.ui.internal.viewers.HeaderViewer;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.swt.widgets.Composite;

/**
 * 
 */
public class ViewerManager implements IViewerManager {
	private boolean displayHeaderInf;
	protected IContentViewer reqViewer;
	protected IContentViewer respViewer;
	protected HeaderViewer reqHeader;
	protected HeaderViewer respHeader;
	
	protected Composite reqHComp;
	protected Composite reqVComp;
	protected Composite respHComp;
	protected Composite respVComp;
	
	protected List viewers;
	protected IRequest request;
	protected List filters = new ArrayList();

	public ViewerManager(Composite reqHeadParent, Composite reqViewParent, Composite respHeadParent, Composite respViewParent) {
		reqHComp = reqHeadParent;
		respHComp = respHeadParent;
		reqVComp = reqViewParent;
		respVComp = respViewParent;
		reqHeader = new HeaderViewer(reqHComp, HeaderViewer.REQUEST_HEADER);
		respHeader = new HeaderViewer(respHComp, HeaderViewer.RESPONSE_HEADER);
		reqViewer = new ByteViewer();
		reqViewer.init(reqVComp);
		respViewer = new ByteViewer();
		respViewer.init(respVComp);
		setDisplayHeaderInfo(MonitorUIPlugin.getShowHeaderPreference());
		setAvailableViewers();
	}

	private void setAvailableViewers() {
		IExtensionRegistry registry = Platform.getExtensionRegistry();
		IConfigurationElement[] cf = registry.getConfigurationElementsFor(MonitorUIPlugin.PLUGIN_ID, "viewers");

		int size = cf.length;
		viewers = new ArrayList(size);
		for (int i = 0; i < size; i++) {
			viewers.add(cf[i]);
		}
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.monitor.internal.view.IViewerManager#hideHeader()
	 */
	/*public void hideHeader() {
		displayHeaderInf = false;
		if (!reqHeader.isHidden())
			reqHeader.hideViewer();
		if (!respHeader.isHidden())
			respHeader.hideViewer();
	}*/
	
	/* (non-Javadoc)
	 * @see org.eclipse.monitor.internal.view.IViewerManager#showHeader()
	 */
	/*public void showHeader() {
		if (reqHeader.isHidden())
			reqHeader.showViewer();
		if (respHeader.isHidden())
			respHeader.showViewer();
	}*/

	/* (non-Javadoc)
	 * @see org.eclipse.monitor.internal.view.IViewerManager#setDisplayHeaderInfo(boolean)
	 */
	public void setDisplayHeaderInfo(boolean b) {
		displayHeaderInf = b;
		reqHeader.setDisplayHeader(b);
		respHeader.setDisplayHeader(b);
		MonitorUIPlugin.setShowHeaderPreference(b);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.monitor.internal.view.IViewerManager#getDisplayHeaderInfo()
	 */
	public boolean getDisplayHeaderInfo() {
		return displayHeaderInf;
	}
	
	public void setRequest(IRequest rr) {
		reqHeader.setRequestResponse(rr);
		respHeader.setRequestResponse(rr);
		
		byte[] b = null;
		if (rr != null)
			b = filter(rr.getRequest(IRequest.CONTENT));
		reqViewer.setContent(b);
		
		b = null;
		if (rr != null)
			b = filter(rr.getResponse(IRequest.CONTENT));
		respViewer.setContent(b);
		
		request = rr;
	}
	
	public void addFilter(IContentFilter filter) {
		filters.add(filter);
		setRequest(request);
	}
	
	public void removeFilter(IContentFilter filter) {
		filters.remove(filter);
		setRequest(request);
	}
	
	protected byte[] filter(byte[] b) {
		if (b == null)
			return null;
		
		Iterator iterator = filters.iterator();
		while (iterator.hasNext()) {
			IContentFilter filter = (IContentFilter) iterator.next();
			try {
				b = filter.filter(request, false, b);
			} catch (Exception e) {
				Trace.trace(Trace.SEVERE, "Error while filtering with " + filter.getId(), e);
			}
		}
		return b;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.tcpip.monitor.internal.view.IViewerManager#getRequestViewers()
	 */
	public List getRequestViewers() {
		IConfigurationElement element;
		Iterator iterator = viewers.iterator();
		List temp = new ArrayList();
		
		while (iterator.hasNext()) {
			element = (IConfigurationElement) iterator.next();
			if (element.getAttribute("type").toLowerCase().indexOf("request") >= 0)
				temp.add(element);
		}
		return temp;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.tcpip.monitor.internal.view.IViewerManager#getResponseViewers()
	 */
	public List getResponseViewers() {
		IConfigurationElement element;
		Iterator iterator = viewers.iterator();
		List temp = new ArrayList();
		
 		while (iterator.hasNext()) {
 			element = (IConfigurationElement) iterator.next();
			if (element.getAttribute("type").toLowerCase().indexOf("response") >= 0)
				temp.add(element);
		}
		return temp;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.tcpip.monitor.internal.view.IViewerManager#setRequestViewer(java.lang.String)
	 */
	public void setRequestViewer(IConfigurationElement element) {
		reqViewer.dispose();
		try {
			reqViewer = (IContentViewer) element.createExecutableExtension("class");
		} catch (CoreException e) {
			Trace.trace(Trace.SEVERE, "Error", e);
		}
		reqViewer.init(reqVComp);
		//reqViewer.setRequestResponse(rr);
		byte[] b = null;
		if (request != null)
			b = filter(request.getRequest(IRequest.CONTENT));
		reqViewer.setContent(b);
		reqVComp.layout(true);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.tcpip.monitor.internal.view.IViewerManager#setResponseViewer(java.lang.String)
	 */
	public void setResponseViewer(IConfigurationElement element) {
		respViewer.dispose();
		try {
			respViewer = (IContentViewer) element.createExecutableExtension("class");
		} catch (CoreException e){
			Trace.trace(Trace.SEVERE, "Error", e);
		}
		respViewer.init(respVComp);
		//respViewer.setRequestResponse(rr);
		byte[] b = null;
		if (request != null)
			b = filter(request.getResponse(IRequest.CONTENT));
		respViewer.setContent(b);
		respVComp.layout(true);
	}
}