/*******************************************************************************
 *  Copyright (c) 2011  Oracle. 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: 
 *  	Oracle - initial API and implementation
 *******************************************************************************/
package org.eclipse.jpt.jaxb.core.internal.context.java;

import java.util.List;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.common.core.utility.TextRange;
import org.eclipse.jpt.common.utility.Filter;
import org.eclipse.jpt.common.utility.internal.CollectionTools;
import org.eclipse.jpt.common.utility.internal.iterables.EmptyIterable;
import org.eclipse.jpt.common.utility.internal.iterables.ListIterable;
import org.eclipse.jpt.jaxb.core.MappingKeys;
import org.eclipse.jpt.jaxb.core.context.JaxbAttributeMapping;
import org.eclipse.jpt.jaxb.core.context.JaxbPersistentAttribute;
import org.eclipse.jpt.jaxb.core.context.XmlElementRef;
import org.eclipse.jpt.jaxb.core.context.XmlElementRefs;
import org.eclipse.jpt.jaxb.core.context.XmlElementRefsMapping;
import org.eclipse.jpt.jaxb.core.context.XmlElementWrapper;
import org.eclipse.jpt.jaxb.core.context.XmlMixed;
import org.eclipse.jpt.jaxb.core.context.java.JavaContextNode;
import org.eclipse.jpt.jaxb.core.resource.java.JAXB;
import org.eclipse.jpt.jaxb.core.resource.java.XmlElementRefAnnotation;
import org.eclipse.jpt.jaxb.core.resource.java.XmlElementRefsAnnotation;
import org.eclipse.jpt.jaxb.core.resource.java.XmlElementWrapperAnnotation;
import org.eclipse.jpt.jaxb.core.resource.java.XmlMixedAnnotation;
import org.eclipse.wst.validation.internal.provisional.core.IMessage;
import org.eclipse.wst.validation.internal.provisional.core.IReporter;


public class GenericJavaXmlElementRefsMapping
		extends AbstractJavaAdaptableAttributeMapping<XmlElementRefsAnnotation>
		implements XmlElementRefsMapping {
	
	protected final XmlElementRefs xmlElementRefs;
	
	protected XmlElementWrapper xmlElementWrapper;
	
	protected XmlMixed xmlMixed;
	
	
	public GenericJavaXmlElementRefsMapping(JaxbPersistentAttribute parent) {
		super(parent);
		this.xmlElementRefs = buildXmlElementRefs();
		initializeXmlElementWrapper();
		initializeXmlMixed();			
	}
	
	
	public String getKey() {
		return MappingKeys.XML_ELEMENT_REFS_ATTRIBUTE_MAPPING_KEY;
	}
	
	@Override
	protected String getAnnotationName() {
		return JAXB.XML_ELEMENT_REFS;
	}
	
	
	// ***** sync/update *****
	
	@Override
	public void synchronizeWithResourceModel() {
		super.synchronizeWithResourceModel();
		this.xmlElementRefs.synchronizeWithResourceModel();
		syncXmlElementWrapper();
		syncXmlMixed();
	}
	
	@Override
	public void update() {
		super.update();
		this.xmlElementRefs.update();
		updateXmlElementWrapper();
		updateXmlMixed();
	}
	
	
	// ***** XmlElementRefs *****
	
	public XmlElementRefs getXmlElementRefs() {
		return this.xmlElementRefs;
	}
	
	protected XmlElementRefs buildXmlElementRefs() {
		return new GenericJavaXmlElementRefs(this, new XmlElementRefsContext());
	}
	
	
	// ***** XmlElementWrapper *****
	
	public XmlElementWrapper getXmlElementWrapper() {
		return this.xmlElementWrapper;
	}
	
	protected void setXmlElementWrapper_(XmlElementWrapper xmlElementWrapper) {
		XmlElementWrapper oldXmlElementWrapper = this.xmlElementWrapper;
		this.xmlElementWrapper = xmlElementWrapper;
		firePropertyChanged(XML_ELEMENT_WRAPPER_PROPERTY, oldXmlElementWrapper, xmlElementWrapper);
	}
	
	public XmlElementWrapper addXmlElementWrapper() {
		if (this.xmlElementWrapper != null) {
			throw new IllegalStateException();
		}
		getJavaResourceAttribute().addAnnotation(JAXB.XML_ELEMENT_WRAPPER);
		XmlElementWrapper xmlElementWrapper = buildXmlElementWrapper();
		setXmlElementWrapper_(xmlElementWrapper);
		return xmlElementWrapper;
	}
	
	public void removeXmlElementWrapper() {
		if (this.xmlElementWrapper == null) {
			throw new IllegalStateException();
		}
		getJavaResourceAttribute().removeAnnotation(JAXB.XML_ELEMENT_WRAPPER);
		setXmlElementWrapper_(null);
	}
	
	protected XmlElementWrapperAnnotation getXmlElementWrapperAnnotation() {
		return (XmlElementWrapperAnnotation) getJavaResourceAttribute().getAnnotation(JAXB.XML_ELEMENT_WRAPPER);
	}
	
	protected XmlElementWrapper buildXmlElementWrapper() {
		return new GenericJavaXmlElementWrapper(this, new GenericJavaXmlElementWrapper.SimpleContext(getXmlElementWrapperAnnotation()));
	}
	
	protected void initializeXmlElementWrapper() {
		if (getXmlElementWrapperAnnotation() != null) {
			this.xmlElementWrapper = buildXmlElementWrapper();
		}
	}
	
	protected void syncXmlElementWrapper() {
		if (getXmlElementWrapperAnnotation() != null) {
			if (this.xmlElementWrapper != null) {
				this.xmlElementWrapper.synchronizeWithResourceModel();
			}
			else {
				setXmlElementWrapper_(buildXmlElementWrapper());
			}
		}
		else {
			setXmlElementWrapper_(null);
		}
	}
	
	protected void updateXmlElementWrapper() {
		if (this.xmlElementWrapper != null) {
			this.xmlElementWrapper.update();
		}
	}
	
	
	// ***** XmlMixed *****
	
	public XmlMixed getXmlMixed() {
		return this.xmlMixed;
	}
	
	protected void setXmlMixed_(XmlMixed xmlMixed) {
		XmlMixed oldXmlMixed = this.xmlMixed;
		this.xmlMixed = xmlMixed;
		firePropertyChanged(XML_MIXED_PROPERTY, oldXmlMixed, xmlMixed);
	}
	
	public XmlMixed addXmlMixed() {
		if (this.xmlMixed != null) {
			throw new IllegalStateException();
		}
		XmlMixedAnnotation annotation = (XmlMixedAnnotation) getJavaResourceAttribute().addAnnotation(JAXB.XML_MIXED);
		
		XmlMixed xmlMixed = buildXmlMixed(annotation);
		setXmlMixed_(xmlMixed);
		return xmlMixed;
	}
	
	public void removeXmlMixed() {
		if (this.xmlMixed == null) {
			throw new IllegalStateException();
		}
		getJavaResourceAttribute().removeAnnotation(JAXB.XML_MIXED);
		setXmlMixed_(null);
	}
	
	protected XmlMixedAnnotation getXmlMixedAnnotation() {
		return (XmlMixedAnnotation) getJavaResourceAttribute().getAnnotation(JAXB.XML_MIXED);
	}
	
	protected XmlMixed buildXmlMixed(XmlMixedAnnotation xmlMixedAnnotation) {
		return new GenericJavaXmlMixed(this, xmlMixedAnnotation);
	}
	
	protected void initializeXmlMixed() {
		XmlMixedAnnotation annotation = getXmlMixedAnnotation();
		if (annotation != null) {
			this.xmlMixed = buildXmlMixed(annotation);
		}
	}
	
	protected void syncXmlMixed() {
		XmlMixedAnnotation annotation = getXmlMixedAnnotation();
		if (annotation != null) {
			if (this.xmlMixed != null) {
				this.xmlMixed.synchronizeWithResourceModel();
			}
			else {
				setXmlMixed_(buildXmlMixed(annotation));
			}
		}
		else {
			setXmlMixed_(null);
		}
	}

	protected void updateXmlMixed() {
		if (this.xmlMixed != null) {
			this.xmlMixed.update();
		}
	}
	
	
	// ***** misc *****
	
	@Override
	public Iterable<String> getReferencedXmlTypeNames() {
		return this.xmlElementRefs.getReferencedXmlTypeNames();
	}
	
	@Override
	public boolean isParticleMapping() {
		return true;
	}
	
	
	// ***** content assist *****
	
	@Override
	public Iterable<String> getJavaCompletionProposals(int pos, Filter<String> filter, CompilationUnit astRoot) {
		Iterable<String> result = super.getJavaCompletionProposals(pos, filter, astRoot);
		if (! CollectionTools.isEmpty(result)) {
			return result;
		}
		
		result = this.xmlElementRefs.getJavaCompletionProposals(pos, filter, astRoot);
		if (! CollectionTools.isEmpty(result)) {
			return result;
		}
		
		if (this.xmlElementWrapper != null) {
			result = this.xmlElementWrapper.getJavaCompletionProposals(pos, filter, astRoot);
			if (! CollectionTools.isEmpty(result)) {
				return result;
			}
		}
		
		return EmptyIterable.instance();
	}
	
	
	// ***** validation *****
	
	@Override
	public void validate(List<IMessage> messages, IReporter reporter, CompilationUnit astRoot) {
		super.validate(messages, reporter, astRoot);
		
		this.xmlElementRefs.validate(messages, reporter, astRoot);
		
		if (this.xmlElementWrapper != null) {
			this.xmlElementWrapper.validate(messages, reporter, astRoot);
		}
		
		if (this.xmlMixed != null) {
			this.xmlMixed.validate(messages, reporter, astRoot);
		}
	}
	
	
	protected class XmlElementRefsContext
			implements GenericJavaXmlElementRefs.Context {
		
		protected XmlElementRefsAnnotation getXmlElementRefsAnnotation() {
			return GenericJavaXmlElementRefsMapping.this.getAnnotation();
		}
		
		public ListIterable<XmlElementRefAnnotation> getXmlElementRefAnnotations() {
			return getXmlElementRefsAnnotation().getXmlElementRefs();
		}
		
		public XmlElementRefAnnotation addXmlElementRefAnnotation(int index) {
			return getXmlElementRefsAnnotation().addXmlElementRef(index);
		}
		
		public void removeXmlElementRefAnnotation(int index) {
			getXmlElementRefsAnnotation().removeXmlElementRef(index);
		}
		
		public void moveXmlElementRefAnnotation(int targetIndex, int sourceIndex) {
			getXmlElementRefsAnnotation().moveXmlElementRef(targetIndex, sourceIndex);
		}
		
		public XmlElementRef buildXmlElementRef(JavaContextNode parent, XmlElementRefAnnotation annotation) {
			return new GenericJavaXmlElementRef(parent, new XmlElementRefContext(annotation));
		}
		
		public TextRange getValidationTextRange(CompilationUnit astRoot) {
			return getXmlElementRefsAnnotation().getTextRange(astRoot);
		}
	}
	
	
	protected class XmlElementRefContext
			implements GenericJavaXmlElementRef.Context {
		
		protected XmlElementRefAnnotation annotation;
		
		public XmlElementRefContext(XmlElementRefAnnotation annotation) {
			this.annotation = annotation;
		}
		
		public XmlElementRefAnnotation getAnnotation() {
			return this.annotation;
		}
		
		public JaxbAttributeMapping getAttributeMapping() {
			return GenericJavaXmlElementRefsMapping.this;
		}
		
		public String getDefaultType() {
			return null;
		}
		
		public XmlElementWrapper getElementWrapper() {
			return GenericJavaXmlElementRefsMapping.this.getXmlElementWrapper();
		}
	}
}