/*******************************************************************************
 * Copyright (c) 2004, 2005 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.ui;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.IAutoEditStrategy;
import org.eclipse.jface.text.ITextDoubleClickStrategy;
import org.eclipse.jface.text.ITextHover;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.jface.text.contentassist.IContentAssistant;
import org.eclipse.jface.text.formatter.ContentFormatter;
import org.eclipse.jface.text.formatter.ContextBasedFormattingStrategy;
import org.eclipse.jface.text.formatter.IContentFormatter;
import org.eclipse.jface.text.formatter.MultiPassContentFormatter;
import org.eclipse.jface.text.hyperlink.IHyperlinkDetector;
import org.eclipse.jface.text.information.IInformationPresenter;
import org.eclipse.jface.text.information.IInformationProvider;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.wst.jsdt.ui.JavaUI;
import org.eclipse.wst.jsdt.ui.PreferenceConstants;
import org.eclipse.wst.jsdt.ui.text.IJavaPartitions;
import org.eclipse.wst.jsdt.ui.text.JavaSourceViewerConfiguration;
import org.eclipse.wst.jsdt.web.core.internal.text.StructuredTextPartitionerForJSP;
import org.eclipse.wst.jsdt.web.core.text.IJSPPartitions;
import org.eclipse.wst.jsdt.web.ui.internal.autoedit.AutoEditStrategyForTabs;
import org.eclipse.wst.jsdt.web.ui.internal.autoedit.StructuredAutoEditStrategyJSP;
import org.eclipse.wst.jsdt.web.ui.internal.contentassist.JSDTContentAssistant;

import org.eclipse.wst.jsdt.web.ui.internal.format.FormattingStrategyJSPJava;
import org.eclipse.wst.jsdt.web.ui.internal.hyperlink.JSPJavaHyperlinkDetector;
import org.eclipse.wst.jsdt.web.ui.internal.hyperlink.XMLHyperlinkDetector;
import org.eclipse.wst.jsdt.web.ui.internal.style.java.LineStyleProviderForJava;
import org.eclipse.wst.jsdt.web.ui.internal.taginfo.JSPJavaJavadocHoverProcessor;
import org.eclipse.wst.jsdt.web.ui.internal.taginfo.JSPJavaJavadocInformationProvider;
import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;
import org.eclipse.wst.common.project.facet.core.runtime.RuntimeManager;
import org.eclipse.wst.css.core.text.ICSSPartitions;
import org.eclipse.wst.html.core.internal.format.HTMLFormatProcessorImpl;
import org.eclipse.wst.html.core.text.IHTMLPartitions;
import org.eclipse.wst.html.ui.StructuredTextViewerConfigurationHTML;
import org.eclipse.wst.sse.core.text.IStructuredPartitions;
import org.eclipse.wst.sse.ui.StructuredTextViewerConfiguration;
import org.eclipse.wst.sse.ui.internal.SSEUIPlugin;
import org.eclipse.wst.sse.ui.internal.format.StructuredFormattingStrategy;
import org.eclipse.wst.sse.ui.internal.provisional.style.LineStyleProvider;
import org.eclipse.wst.sse.ui.internal.taginfo.TextHoverManager;
import org.eclipse.wst.sse.ui.internal.util.EditorUtility;
import org.eclipse.wst.xml.core.text.IXMLPartitions;
import org.eclipse.wst.xml.ui.StructuredTextViewerConfigurationXML;

/**
 * Configuration for a source viewer which shows JSP content.
 * <p>
 * Clients can subclass and override just those methods which must be specific
 * to their needs.
 * </p>
 * 
 * @see org.eclipse.wst.sse.ui.StructuredTextViewerConfiguration
 * @since 1.0
 */
public class StructuredTextViewerConfigurationJSP extends StructuredTextViewerConfiguration {
	/*
	 * One instance per configuration because not sourceviewer-specific and it's
	 * a String array
	 */
	private String[]						  fConfiguredContentTypes;
	/*
	 * One instance per configuration
	 */
	private LineStyleProvider				 fLineStyleProviderForJava;
	/*
	 * One instance per configuration
	 */
	private LineStyleProvider				 fLineStyleProviderForJSP;
	/*
	 * One instance per configuration
	 */

	private StructuredTextViewerConfiguration fHTMLSourceViewerConfiguration;
	private JavaSourceViewerConfiguration	 fJavaSourceViewerConfiguration;
	private StructuredTextViewerConfiguration fXMLSourceViewerConfiguration;
	
	/**
	 * Create new instance of StructuredTextViewerConfigurationJSP
	 */
	public StructuredTextViewerConfigurationJSP() {
		// Must have empty constructor to createExecutableExtension
		super();
	}
	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getAutoEditStrategies(org.eclipse.jface.text.source.ISourceViewer,
	 *      java.lang.String)
	 */
	@Override
	public IAutoEditStrategy[] getAutoEditStrategies(ISourceViewer sourceViewer, String contentType) {
		IAutoEditStrategy[] strategies = null;
		
		if (contentType == IJSPPartitions.JSP_CONTENT_JAVA) {
			// jsp java autoedit strategies
			List allStrategies = new ArrayList(0);
			
			IAutoEditStrategy[] javaStrategies = getJavaSourceViewerConfiguration().getAutoEditStrategies(sourceViewer, IJavaPartitions.JAVA_PARTITIONING);
			for (int i = 0; i < javaStrategies.length; i++) {
				allStrategies.add(javaStrategies[i]);
			}
			// be sure this is added last, after others, so it can modify
			// results from earlier steps.
			// add auto edit strategy that handles when tab key is pressed
			allStrategies.add(new AutoEditStrategyForTabs());
			
			strategies = (IAutoEditStrategy[]) allStrategies.toArray(new IAutoEditStrategy[allStrategies.size()]);
		}
		return strategies;
		// if (contentType == IXMLPartitions.XML_DEFAULT) {
		// // xml autoedit strategies
		// strategies = getXMLSourceViewerConfiguration()
		// .getAutoEditStrategies(sourceViewer, contentType);
		// } else if (contentType == IJSPPartitions.JSP_CONTENT_JAVA) {
		// // jsp java autoedit strategies
		// List allStrategies = new ArrayList(0);
		//
		// IAutoEditStrategy[] javaStrategies =
		// getJavaSourceViewerConfiguration()
		// .getAutoEditStrategies(sourceViewer,
		// IJavaPartitions.JAVA_PARTITIONING);
		// for (int i = 0; i < javaStrategies.length; i++) {
		// allStrategies.add(javaStrategies[i]);
		// }
		// // be sure this is added last, after others, so it can modify
		// // results from earlier steps.
		// // add auto edit strategy that handles when tab key is pressed
		// allStrategies.add(new AutoEditStrategyForTabs());
		//
		// strategies = (IAutoEditStrategy[]) allStrategies
		// .toArray(new IAutoEditStrategy[allStrategies.size()]);
		// } else if (contentType == IHTMLPartitions.HTML_DEFAULT
		// || contentType == IHTMLPartitions.HTML_DECLARATION) {
		// // html and jsp autoedit strategies
		// List allStrategies = new ArrayList(0);
		//
		// // add the jsp autoedit strategy first then add all html's
		// allStrategies.add(new StructuredAutoEditStrategyJSP());
		//
		// IAutoEditStrategy[] htmlStrategies =
		// getHTMLSourceViewerConfiguration()
		// .getAutoEditStrategies(sourceViewer, contentType);
		// for (int i = 0; i < htmlStrategies.length; i++) {
		// allStrategies.add(htmlStrategies[i]);
		// }
		//
		// strategies = (IAutoEditStrategy[]) allStrategies
		// .toArray(new IAutoEditStrategy[allStrategies.size()]);
		// } else {
		// // default autoedit strategies
		// List allStrategies = new ArrayList(0);
		//
		// IAutoEditStrategy[] superStrategies = super.getAutoEditStrategies(
		// sourceViewer, contentType);
		// for (int i = 0; i < superStrategies.length; i++) {
		// allStrategies.add(superStrategies[i]);
		// }
		//
		// // be sure this is added last, after others, so it can modify
		// // results from earlier steps.
		// // add auto edit strategy that handles when tab key is pressed
		// allStrategies.add(new AutoEditStrategyForTabs());
		//
		// strategies = (IAutoEditStrategy[]) allStrategies
		// .toArray(new IAutoEditStrategy[allStrategies.size()]);
		// }
		//
		// return strategies;
	}
	
	@Override
	public String[] getConfiguredContentTypes(ISourceViewer sourceViewer) {
		if (fConfiguredContentTypes == null) {
			/*
			 * A little bit of cheating because assuming html's configured
			 * content types will add default, unknown, and all xml configured
			 * content types
			 */
			// String[] htmlTypes = getHTMLSourceViewerConfiguration()
			// .getConfiguredContentTypes(sourceViewer);
			// String[] jspTypes = StructuredTextPartitionerForJSP
			// .getConfiguredContentTypes();
			// fConfiguredContentTypes = new String[htmlTypes.length
			// + jspTypes.length];
			//
			// int index = 0;
			// System.arraycopy(htmlTypes, 0, fConfiguredContentTypes, index,
			// htmlTypes.length);
			// System.arraycopy(jspTypes, 0, fConfiguredContentTypes,
			// index += htmlTypes.length, jspTypes.length);
		}
		return new String[] { IJSPPartitions.JSP_CONTENT_JAVA };
		// return fConfiguredContentTypes;
	}
	
	@Override
	protected IContentAssistProcessor[] getContentAssistProcessors(ISourceViewer sourceViewer, String partitionType) {
		IContentAssistProcessor[] processors = null;
		
		if (partitionType == IJSPPartitions.JSP_CONTENT_JAVA) {
			// processors = new IContentAssistProcessor[] { new
			// JSPJavaContentAssistProcessor() };
			// processors = new IContentAssistProcessor[] { new
			// JSPContentAssistProcessor()};
			processors = new IContentAssistProcessor[] { new JSDTContentAssistant() };
		}
		
		// if ((partitionType == IXMLPartitions.XML_CDATA)
		// || (partitionType == IJSPPartitions.JSP_CONTENT_JAVA)) {
		//		
		//			
		// processors = new IContentAssistProcessor[] { new
		// JSPJavaContentAssistProcessor() };
		//
		// } else if (partitionType == ICSSPartitions.STYLE) {
		// // HTML CSS
		// IContentAssistant htmlContentAssistant =
		// getHTMLSourceViewerConfiguration()
		// .getContentAssistant(sourceViewer);
		// IContentAssistProcessor processor = htmlContentAssistant
		// .getContentAssistProcessor(ICSSPartitions.STYLE);
		// processors = new IContentAssistProcessor[] { processor };
		// } else if ((partitionType == IXMLPartitions.XML_DEFAULT)
		// || (partitionType == IHTMLPartitions.HTML_DEFAULT)
		// || (partitionType == IHTMLPartitions.HTML_COMMENT)) {
		// // jsp
		// processors = new IContentAssistProcessor[] { new
		// JSPContentAssistProcessor() };
		// }
		//
		// else if (partitionType == IStructuredPartitions.UNKNOWN_PARTITION) {
		// // unknown
		// processors = new IContentAssistProcessor[] { new
		// NoRegionContentAssistProcessorForJSP() };
		// }
		//
		return processors;
	}
	
	@Override
	public IContentFormatter getContentFormatter(ISourceViewer sourceViewer) {
		ContentFormatter formatter = new ContentFormatter();
		
		//
		// formatter.setMasterStrategy(new StructuredFormattingStrategy(
		// new HTMLFormatProcessorImpl()));
		formatter.setFormattingStrategy(new FormattingStrategyJSPJava(), IJSPPartitions.JSP_CONTENT_JAVA);
		
		return formatter;
	}

	
	@Override
	public ITextDoubleClickStrategy getDoubleClickStrategy(ISourceViewer sourceViewer, String contentType) {
		ITextDoubleClickStrategy strategy = null;
		
		if (contentType == IJSPPartitions.JSP_CONTENT_JAVA) {
			// JSP Java or JSP JavaScript
			strategy = getJavaSourceViewerConfiguration().getDoubleClickStrategy(sourceViewer, contentType);
		}
		// html or javascript
		// if (contentType == IHTMLPartitions.HTML_DEFAULT) {
		// strategy = getHTMLSourceViewerConfiguration()
		// .getDoubleClickStrategy(sourceViewer, contentType);
		// } else if (contentType == IJSPPartitions.JSP_CONTENT_JAVA) {
		// // JSP Java or JSP JavaScript
		// strategy = getJavaSourceViewerConfiguration()
		// .getDoubleClickStrategy(sourceViewer, contentType);
		// } else {
		// strategy = super.getDoubleClickStrategy(sourceViewer, contentType);
		// }
		
		return strategy;
	}
	
	// private StructuredTextViewerConfiguration
	// getHTMLSourceViewerConfiguration() {
	// if (fHTMLSourceViewerConfiguration == null) {
	// fHTMLSourceViewerConfiguration = new
	// StructuredTextViewerConfigurationHTML();
	// }
	// return fHTMLSourceViewerConfiguration;
	// }
	
	@Override
	public IHyperlinkDetector[] getHyperlinkDetectors(ISourceViewer sourceViewer) {
		
		if (fPreferenceStore == null) {
			return null;
		}
		if (sourceViewer == null || !fPreferenceStore.getBoolean(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_HYPERLINKS_ENABLED)) {
			return null;
		}
		
		List allDetectors = new ArrayList(0);
		allDetectors.add(new JSPJavaHyperlinkDetector());
		// allDetectors.add(new TaglibHyperlinkDetector());
		// allDetectors.add(new XMLHyperlinkDetector());
		//
		// IHyperlinkDetector[] superDetectors = super
		// .getHyperlinkDetectors(sourceViewer);
		// for (int m = 0; m < superDetectors.length; m++) {
		// IHyperlinkDetector detector = superDetectors[m];
		// if (!allDetectors.contains(detector)) {
		// allDetectors.add(detector);
		// }
		// }
		return (IHyperlinkDetector[]) allDetectors.toArray(new IHyperlinkDetector[0]);
	}
	
	@Override
	public String[] getIndentPrefixes(ISourceViewer sourceViewer, String contentType) {
		String[] indentations = null;
		
		// if (contentType == IXMLPartitions.XML_DEFAULT) {
		// indentations = getXMLSourceViewerConfiguration().getIndentPrefixes(
		// sourceViewer, contentType);
		// } else {
		// indentations = getHTMLSourceViewerConfiguration()
		// .getIndentPrefixes(sourceViewer, contentType);
		// }
		
		return indentations;
	}
	
	@Override
	protected IInformationProvider getInformationProvider(ISourceViewer sourceViewer, String partitionType) {
		IInformationProvider provider = null;
		// if (partitionType == IHTMLPartitions.HTML_DEFAULT) {
		// // HTML
		// IInformationPresenter htmlPresenter =
		// getHTMLSourceViewerConfiguration()
		// .getInformationPresenter(sourceViewer);
		// provider = htmlPresenter
		// .getInformationProvider(IHTMLPartitions.HTML_DEFAULT);
		// }
		//
		// else if (partitionType == IXMLPartitions.XML_DEFAULT) {
		// // XML
		// IInformationPresenter xmlPresenter =
		// getXMLSourceViewerConfiguration()
		// .getInformationPresenter(sourceViewer);
		// provider = xmlPresenter
		// .getInformationProvider(IXMLPartitions.XML_DEFAULT);
		// }
		//
		// else
		if (partitionType == IJSPPartitions.JSP_CONTENT_JAVA) {
			// JSP java
			provider = new JSPJavaJavadocInformationProvider();
		}
		return provider;
	}
	
	private JavaSourceViewerConfiguration getJavaSourceViewerConfiguration() {
		if (fJavaSourceViewerConfiguration == null) {
			IPreferenceStore store = PreferenceConstants.getPreferenceStore();
			/*
			 * NOTE: null text editor is being passed to
			 * JavaSourceViewerConfiguration because
			 * StructuredTextViewerConfiguration does not know current editor.
			 * this is okay because editor is not needed in the cases we are
			 * using javasourceviewerconfiguration.
			 */
			fJavaSourceViewerConfiguration = new JavaSourceViewerConfiguration(JavaUI.getColorManager(), store, null, IJavaPartitions.JAVA_PARTITIONING);
		}
		return fJavaSourceViewerConfiguration;
	}
	
	@Override
	public LineStyleProvider[] getLineStyleProviders(ISourceViewer sourceViewer, String partitionType) {
		
		LineStyleProvider[] providers = null;
		
		// if (partitionType == IHTMLPartitions.HTML_DEFAULT
		// || partitionType == IHTMLPartitions.HTML_COMMENT
		// || partitionType == IHTMLPartitions.HTML_DECLARATION) {
		// providers = getHTMLSourceViewerConfiguration()
		// .getLineStyleProviders(sourceViewer,
		// IHTMLPartitions.HTML_DEFAULT);
		// }
		//
		// else if (partitionType == ICSSPartitions.STYLE) {
		// providers = getHTMLSourceViewerConfiguration()
		// .getLineStyleProviders(sourceViewer, ICSSPartitions.STYLE);
		// } else if (partitionType == IXMLPartitions.XML_DEFAULT
		// || partitionType == IXMLPartitions.XML_CDATA
		// || partitionType == IXMLPartitions.XML_COMMENT
		// || partitionType == IXMLPartitions.XML_DECLARATION
		// || partitionType == IXMLPartitions.XML_PI) {
		// providers = getXMLSourceViewerConfiguration()
		// .getLineStyleProviders(sourceViewer,
		// IXMLPartitions.XML_DEFAULT);
		// } else
		if (partitionType == IJSPPartitions.JSP_CONTENT_JAVA) {
			providers = new LineStyleProvider[] { getLineStyleProviderForJava() };
		}
		
		return providers;
	}
	
	private LineStyleProvider getLineStyleProviderForJava() {
		if (fLineStyleProviderForJava == null) {
			fLineStyleProviderForJava = new LineStyleProviderForJava();
		}
		return fLineStyleProviderForJava;
	}
	
	@Override
	public ITextHover getTextHover(ISourceViewer sourceViewer, String contentType, int stateMask) {
		ITextHover hover = null;
		
		// if (contentType == IHTMLPartitions.HTML_DEFAULT) {
		// // html and javascript regions
		// hover = getHTMLSourceViewerConfiguration().getTextHover(
		// sourceViewer, contentType, stateMask);
		// } else if (contentType == IXMLPartitions.XML_DEFAULT) {
		// // xml regions
		// hover = getXMLSourceViewerConfiguration().getTextHover(
		// sourceViewer, contentType, stateMask);
		// } else
		if (contentType == IJSPPartitions.JSP_CONTENT_JAVA) {
			TextHoverManager manager = SSEUIPlugin.getDefault().getTextHoverManager();
			TextHoverManager.TextHoverDescriptor[] hoverDescs = manager.getTextHovers();
			int i = 0;
			while (i < hoverDescs.length && hover == null) {
				if (hoverDescs[i].isEnabled() && EditorUtility.computeStateMask(hoverDescs[i].getModifierString()) == stateMask) {
					String hoverType = hoverDescs[i].getId();
					if (TextHoverManager.COMBINATION_HOVER.equalsIgnoreCase(hoverType)) {
						
						hover = manager.createBestMatchHover(new JSPJavaJavadocHoverProcessor());
						
					} else if (TextHoverManager.DOCUMENTATION_HOVER.equalsIgnoreCase(hoverType)) {
						
						hover = new JSPJavaJavadocHoverProcessor();
						
					}
				}
				i++;
			}
		}
		
		// no appropriate text hovers found, try super
		if (hover == null) {
			hover = super.getTextHover(sourceViewer, contentType, stateMask);
		}
		return hover;
		
	}
	
	private StructuredTextViewerConfiguration getXMLSourceViewerConfiguration() {
		if (fXMLSourceViewerConfiguration == null) {
			fXMLSourceViewerConfiguration = new StructuredTextViewerConfigurationXML();
		}
		return fXMLSourceViewerConfiguration;
	}
}