/*******************************************************************************
 * Copyright (c) 2003, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.ant.tests.ui.editor.support;

import java.io.File;
import java.io.IOException;

import org.eclipse.ant.internal.ui.editor.AntEditor;
import org.eclipse.ant.internal.ui.editor.AntEditorCompletionProcessor;
import org.eclipse.ant.internal.ui.model.AntModel;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.contentassist.ICompletionListener;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.contentassist.IContentAssistantExtension2;
import org.eclipse.jface.text.source.ISourceViewer;
import org.junit.Assert;
import org.w3c.dom.Element;

public class TestTextCompletionProcessor extends AntEditorCompletionProcessor {

	public final static int TEST_PROPOSAL_MODE_NONE = AntEditorCompletionProcessor.PROPOSAL_MODE_NONE;
	public final static int TEST_PROPOSAL_MODE_BUILDFILE = AntEditorCompletionProcessor.PROPOSAL_MODE_BUILDFILE;
	public final static int TEST_PROPOSAL_MODE_TASK_PROPOSAL = AntEditorCompletionProcessor.PROPOSAL_MODE_TASK_PROPOSAL;
	public final static int TEST_PROPOSAL_MODE_PROPERTY_PROPOSAL = AntEditorCompletionProcessor.PROPOSAL_MODE_PROPERTY_PROPOSAL;
	public final static int TEST_PROPOSAL_MODE_ATTRIBUTE_PROPOSAL = AntEditorCompletionProcessor.PROPOSAL_MODE_ATTRIBUTE_PROPOSAL;
	public final static int TEST_PROPOSAL_MODE_TASK_PROPOSAL_CLOSING = AntEditorCompletionProcessor.PROPOSAL_MODE_TASK_PROPOSAL_CLOSING;
	public final static int TEST_PROPOSAL_MODE_ATTRIBUTE_VALUE_PROPOSAL = AntEditorCompletionProcessor.PROPOSAL_MODE_ATTRIBUTE_VALUE_PROPOSAL;

	private File fEditedFile;
	private ISourceViewer fViewer;
	private boolean fNeedsToDispose = true;

	public TestTextCompletionProcessor(AntModel model) {
		super(model);
		fContentAssistant = new IContentAssistantExtension2() {
			@Override
			public void setEmptyMessage(String message) {
				// do nothing
			}

			@Override
			public void setStatusMessage(String message) {
				// do nothing
			}

			@Override
			public void setStatusLineVisible(boolean show) {
				// do nothing
			}

			@Override
			public void setShowEmptyList(boolean showEmpty) {
				// do nothing
			}

			@Override
			public void setRepeatedInvocationMode(boolean cycling) {
				// do nothing
			}

			@Override
			public void removeCompletionListener(ICompletionListener listener) {
				// do nothing
			}

			@Override
			public void addCompletionListener(ICompletionListener listener) {
				// do nothing
			}
		};
	}

	public TestTextCompletionProcessor(AntEditor editor) {
		this(editor.getAntModel());
		fViewer = editor.getViewer();
		fNeedsToDispose = false;
	}

	public TestTextCompletionProcessor() {
		this((AntModel) null);
	}

	@Override
	public ICompletionProposal[] getAttributeProposals(String taskName, String prefix) {
		if (cursorPosition == -1) {
			cursorPosition = taskName.length();
		}
		return super.getAttributeProposals(taskName, prefix);
	}

	@Override
	public Element findChildElementNamedOf(Element anElement, String childElementName) {
		return super.findChildElementNamedOf(anElement, childElementName);
	}

	public ICompletionProposal[] getTaskProposals(String text, String parentName, String prefix) {
		cursorPosition = Math.max(0, text.length() - 1);
		return super.getTaskProposals(new Document(text), parentName, prefix);
	}

	@Override
	public ICompletionProposal[] getTaskProposals(IDocument document, String parentName, String aPrefix) {
		cursorPosition = Math.max(0, document.getLength() - 1);
		return super.getTaskProposals(document, parentName, aPrefix);
	}

	public int determineProposalMode(String text, int theCursorPosition, String prefix) {
		return super.determineProposalMode(new Document(text), theCursorPosition, prefix);
	}

	public String getParentName(String text, int aLineNumber, int aColumnNumber) {
		return super.getParentName(new Document(text), aLineNumber, aColumnNumber);
	}

	@Override
	public String getParentName(IDocument doc, int aLineNumber, int aColumnNumber) {
		return super.getParentName(doc, aLineNumber, aColumnNumber);
	}

	@Override
	public String getPrefixFromDocument(String aDocumentText, int anOffset) {
		String prefix = super.getPrefixFromDocument(aDocumentText, anOffset);
		currentPrefix = null;
		return prefix;
	}

	@Override
	public ICompletionProposal[] getPropertyProposals(IDocument document, String prefix, int cursorPos) {
		return super.getPropertyProposals(document, prefix, cursorPos);
	}

	/**
	 * Returns the edited File that org.eclipse.ant.internal.ui.editor.AntEditorCompletionProcessor sets or a temporary file, which only serves as a
	 * dummy.
	 * 
	 * @see org.eclipse.ant.internal.ui.editor.AntEditorCompletionProcessor#getEditedFile()
	 */
	@Override
	public File getEditedFile() {
		if (fEditedFile != null) {
			return fEditedFile;
		}
		File tempFile = null;
		try {
			tempFile = File.createTempFile("test", null); //$NON-NLS-1$
		}
		catch (IOException e) {
			Assert.fail(e.getMessage());
		}
		tempFile.deleteOnExit();
		return tempFile;
	}

	public void setLineNumber(int aLineNumber) {
		lineNumber = aLineNumber;
	}

	public void setColumnNumber(int aColumnNumber) {
		columnNumber = aColumnNumber;
	}

	public void setCursorPosition(int cursorPosition) {
		this.cursorPosition = cursorPosition;
	}

	public void setEditedFile(File aFile) {
		fEditedFile = aFile;
	}

	@Override
	public ICompletionProposal[] getTargetAttributeValueProposals(IDocument document, String textToSearch, String prefix, String attributeName) {
		return super.getTargetAttributeValueProposals(document, textToSearch, prefix, attributeName);
	}

	@Override
	public ICompletionProposal[] getAntCallAttributeValueProposals(IDocument document, String prefix, String attributeName) {
		return super.getAntCallAttributeValueProposals(document, prefix, attributeName);
	}

	/**
	 * Since the testing occurs without necessarily having an associated viewer, return a dummy value.
	 */
	@Override
	protected char getPreviousChar() {
		return '?';
	}

	/**
	 * Returns whether the specified task name is known.
	 */
	@Override
	protected boolean isKnownElement(String elementName) {
		if (antModel != null) {
			return super.isKnownElement(elementName);
		}
		return getDtd().getElement(elementName) != null;
	}

	@Override
	public ICompletionProposal[] getProposalsFromDocument(IDocument document, String prefix) {
		return super.getProposalsFromDocument(document, prefix);
	}

	public ICompletionProposal[] getBuildFileProposals(String text, String prefix) {
		return super.getBuildFileProposals(new Document(text), prefix);
	}

	public ICompletionProposal[] determineTemplateProposals() {
		return super.determineTemplateProposals(fViewer, cursorPosition);
	}

	public ICompletionProposal[] computeCompletionProposals(int documentOffset) {
		return super.computeCompletionProposals(fViewer, documentOffset);
	}

	public void dispose() {
		if (fNeedsToDispose && antModel != null) {
			// not working with an editor
			antModel.dispose();
		}
	}
}