/*******************************************************************************
 * Copyright (c) 2004, 2008 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.jsdt.web.core.javascript.search;

import java.util.HashMap;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceProxy;
import org.eclipse.core.resources.IResourceProxyVisitor;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Platform;
import org.eclipse.wst.jsdt.core.search.IJavaScriptSearchScope;
import org.eclipse.wst.jsdt.core.search.SearchPattern;
import org.eclipse.wst.jsdt.web.core.internal.validation.Util;

/**
*

* Provisional API: This class/interface is part of an interim API that is still under development and expected to
* change significantly before reaching stability. It is being made available at this early stage to solicit feedback
* from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
* (repeatedly) as the API evolves.
*
 * pa_TODO Still need to take into consideration:
 * 	- focus in workspace
 *  - search pattern
 * 
 * @author pavery
 */
public class JsPathIndexer {

	// for debugging
	static final boolean DEBUG;
	static {
		
		String value= Platform.getDebugOption("org.eclipse.jst.jsp.core/debug/jspsearch"); //$NON-NLS-1$
		DEBUG = true;
		//DEBUG= (value != null) && value.equalsIgnoreCase("true"); //$NON-NLS-1$
	}
	
	// visitor that retrieves jsp project paths for all jsp files in the workspace
	class JSPFileVisitor implements IResourceProxyVisitor {
		// hash map forces only one of each file
		private HashMap fPaths = new HashMap();
		IJavaScriptSearchScope fScope = null;
		SearchPattern fPattern = null;

		public JSPFileVisitor(SearchPattern pattern, IJavaScriptSearchScope scope) {
			this.fPattern = pattern;
			this.fScope = scope;
		}

		public boolean visit(IResourceProxy proxy) throws CoreException {
			
			if(JsSearchSupport.getInstance().isCanceled()) {
				return false;
			}
			
			if (proxy.getType() == IResource.FILE) {

				//IContentType contentTypeJSP = Platform.getContentTypeManager().getContentType(ContentTypeIdForJSP.ContentTypeID_JSP);
				// https://w3.opensource.ibm.com/bugzilla/show_bug.cgi?id=3553
				// check this before description
				// check name before actually getting the file (less work)
				//if(contentTypeJSP.isAssociatedWith(proxy.getName())) {
				if(Util.isJsType(proxy.getName())){	
					IFile file = (IFile)proxy.requestResource();
					//IContentDescription contentDescription = file.getContentDescription();
					String ctId = null;
//					if (contentDescription != null) {
//						ctId = contentDescription.getContentType().getId();
//					}
					//if (ContentTypeIdForJSP.ContentTypeID_JSP.equals(ctId)) {
					//if(Util.isJsType(file.getName())){
						if (this.fScope.encloses(proxy.requestFullPath().toString())) {
	
							if (DEBUG) {
								System.out.println("adding selected index path:" + file.getParent().getFullPath()); //$NON-NLS-1$
							}

							fPaths.put(file.getParent().getFullPath(), JsSearchSupport.getInstance().computeIndexLocation(file.getParent().getFullPath()));
						}
					//}
				}
				// don't search deeper for files
				return false;
			}
			return true;
		}

		public IPath[] getPaths() {
			return (IPath[]) fPaths.values().toArray(new IPath[fPaths.size()]);
		}
	}

	public IPath[] getVisibleJspPaths(SearchPattern pattern, IJavaScriptSearchScope scope) {

		JSPFileVisitor jspFileVisitor = new JSPFileVisitor(pattern, scope);
		try {
			ResourcesPlugin.getWorkspace().getRoot().accept(jspFileVisitor, 0);
		}
		catch (CoreException e) {
			e.printStackTrace();
		}
		return jspFileVisitor.getPaths();
	}
}