/*******************************************************************************
 * Copyright (c) 2007 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.xml.ui.internal.validation;

import java.util.ArrayList;

import org.eclipse.jface.text.contentassist.CompletionProposal;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.quickassist.IQuickAssistInvocationContext;
import org.eclipse.jface.text.quickassist.IQuickAssistProcessor;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.swt.graphics.Image;
import org.eclipse.wst.xml.ui.internal.XMLUIMessages;
import org.eclipse.wst.xml.ui.internal.correction.ProblemIDsXML;
import org.eclipse.wst.xml.ui.internal.correction.RemoveUnknownElementQuickFixProposal;
import org.eclipse.wst.xml.ui.internal.correction.RenameInFileQuickAssistProposal;
import org.eclipse.wst.xml.ui.internal.editor.XMLEditorPluginImageHelper;
import org.eclipse.wst.xml.ui.internal.editor.XMLEditorPluginImages;

/**
 * Quick assist processor for problems found by the markup validator
 */
class MarkupQuickAssistProcessor implements IQuickAssistProcessor {
	private int fProblemId;
	private Object fAdditionalFixInfo = null;

	public boolean canAssist(IQuickAssistInvocationContext invocationContext) {
		return false;
	}

	public boolean canFix(Annotation annotation) {
		boolean result = false;

		switch (fProblemId) {
			case ProblemIDsXML.EmptyTag :
			case ProblemIDsXML.MissingEndTag :
			case ProblemIDsXML.AttrsInEndTag :
			case ProblemIDsXML.MissingAttrValue :
			case ProblemIDsXML.NoAttrValue :
			case ProblemIDsXML.SpacesBeforeTagName :
			case ProblemIDsXML.SpacesBeforePI :
			case ProblemIDsXML.NamespaceInPI :
			case ProblemIDsXML.UnknownElement :
			case ProblemIDsXML.UnknownAttr :
			case ProblemIDsXML.InvalidAttrValue :
			case ProblemIDsXML.MissingRequiredAttr :
			case ProblemIDsXML.AttrValueNotQuoted :
			case ProblemIDsXML.MissingClosingBracket :
				result = true;
		}

		return result;
	}

	public ICompletionProposal[] computeQuickAssistProposals(IQuickAssistInvocationContext invocationContext) {
		ArrayList proposals = new ArrayList();

		switch (fProblemId) {
			case ProblemIDsXML.EmptyTag :
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_0, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
			case ProblemIDsXML.MissingEndTag :
				String tagName = (String) ((Object[]) fAdditionalFixInfo)[0];
				String tagClose = (String) ((Object[]) fAdditionalFixInfo)[1];
				int tagCloseOffset = ((Integer) ((Object[]) fAdditionalFixInfo)[2]).intValue();
				int startTagEndOffset = ((Integer) ((Object[]) fAdditionalFixInfo)[3]).intValue();
				int firstChildStartOffset = ((Integer) ((Object[]) fAdditionalFixInfo)[4]).intValue();
				int endOffset = ((Integer) ((Object[]) fAdditionalFixInfo)[5]).intValue();
				proposals.add(new CompletionProposal(tagClose, tagCloseOffset, 0, 0, getImage(), XMLUIMessages.QuickFixProcessorXML_1, null, "")); //$NON-NLS-1$ 
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), startTagEndOffset - invocationContext.getOffset(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_2, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				proposals.add(new CompletionProposal("</" + tagName + ">", firstChildStartOffset, 0, 0, getImage(), XMLUIMessages.QuickFixProcessorXML_3, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ 
				proposals.add(new CompletionProposal("</" + tagName + ">", endOffset, 0, 0, getImage(), XMLUIMessages.QuickFixProcessorXML_4, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ 
				break;
			case ProblemIDsXML.AttrsInEndTag :
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_5, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
			case ProblemIDsXML.MissingAttrValue :
				String defaultAttrValue = (String) ((Object[]) fAdditionalFixInfo)[0];
				int insertOffset = ((Integer) ((Object[]) fAdditionalFixInfo)[1]).intValue();
				proposals.add(new CompletionProposal("\"" + defaultAttrValue + "\"", invocationContext.getOffset() + invocationContext.getLength() + insertOffset, 0, defaultAttrValue.length() + 2, getImage(), XMLUIMessages.QuickFixProcessorXML_6, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ 
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_7, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
			case ProblemIDsXML.NoAttrValue :
				defaultAttrValue = (String) fAdditionalFixInfo;
				proposals.add(new CompletionProposal("=\"" + defaultAttrValue + "\"", invocationContext.getOffset() + invocationContext.getLength(), 0, defaultAttrValue.length() + 3, getImage(), XMLUIMessages.QuickFixProcessorXML_6, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ 
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_7, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
			case ProblemIDsXML.SpacesBeforeTagName :
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_8, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
			case ProblemIDsXML.SpacesBeforePI :
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_9, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
			case ProblemIDsXML.NamespaceInPI :
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_10, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
			case ProblemIDsXML.UnknownElement :
				proposals.add(new RemoveUnknownElementQuickFixProposal(fAdditionalFixInfo, getImage(), XMLUIMessages.QuickFixProcessorXML_11));
				proposals.add(new RenameInFileQuickAssistProposal());
				break;
			case ProblemIDsXML.UnknownAttr :
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_7, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				proposals.add(new RenameInFileQuickAssistProposal());
				break;
			case ProblemIDsXML.InvalidAttrValue :
				proposals.add(new CompletionProposal("", invocationContext.getOffset(), invocationContext.getLength(), 0, getImage(), XMLUIMessages.QuickFixProcessorXML_12, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
			case ProblemIDsXML.MissingRequiredAttr :
				String requiredAttr = (String) ((Object[]) fAdditionalFixInfo)[0];
				insertOffset = ((Integer) ((Object[]) fAdditionalFixInfo)[1]).intValue();
				proposals.add(new CompletionProposal(requiredAttr, invocationContext.getOffset() + insertOffset, 0, requiredAttr.length(), getImage(), XMLUIMessages.QuickFixProcessorXML_13, null, "")); //$NON-NLS-1$ 
				break;
			case ProblemIDsXML.AttrValueNotQuoted :
				String attrValue = (String) fAdditionalFixInfo;
				proposals.add(new CompletionProposal("\"" + attrValue + "\"", invocationContext.getOffset(), invocationContext.getLength(), attrValue.length() + 2, getImage(), XMLUIMessages.QuickFixProcessorXML_14, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ 
				break;
			case ProblemIDsXML.MissingClosingBracket :
				proposals.add(new CompletionProposal(">", invocationContext.getOffset() + invocationContext.getLength(), 0, 1, getImage(), XMLUIMessages.QuickFixProcessorXML_15, null, "")); //$NON-NLS-1$ //$NON-NLS-2$ 
				break;
		}
		return (ICompletionProposal[]) proposals.toArray(new ICompletionProposal[proposals.size()]);
	}

	public String getErrorMessage() {
		return null;
	}

	private Image getImage() {
		return XMLEditorPluginImageHelper.getInstance().getImage(XMLEditorPluginImages.IMG_OBJ_CORRECTION_CHANGE);
	}

	public void setProblemId(int problemId) {
		fProblemId = problemId;
	}

	public void setAdditionalFixInfo(Object fixInfo) {
		fAdditionalFixInfo = fixInfo;
	}
}