/*******************************************************************************
 * Copyright (c) 2010, 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 org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.common.core.utility.TextRange;
import org.eclipse.jpt.jaxb.core.context.JaxbPackageInfo;
import org.eclipse.jpt.jaxb.core.context.XmlNs;
import org.eclipse.jpt.jaxb.core.context.XmlNsForm;
import org.eclipse.jpt.jaxb.core.context.XmlSchema;
import org.eclipse.jpt.jaxb.core.resource.java.JavaResourcePackage;
import org.eclipse.jpt.jaxb.core.resource.java.XmlNsAnnotation;
import org.eclipse.jpt.jaxb.core.resource.java.XmlSchemaAnnotation;
import org.eclipse.jpt.utility.Filter;
import org.eclipse.jpt.utility.internal.CollectionTools;
import org.eclipse.jpt.utility.internal.StringTools;
import org.eclipse.jpt.utility.internal.iterables.EmptyIterable;
import org.eclipse.jpt.utility.internal.iterables.FilteringIterable;
import org.eclipse.jpt.utility.internal.iterables.ListIterable;

public class GenericJavaXmlSchema
		extends AbstractJavaContextNode
		implements XmlSchema {
	
	protected String specifiedNamespace;
	
	protected String location;
	
	protected XmlNsForm attributeFormDefault;
	
	protected XmlNsForm elementFormDefault;
	
	protected final XmlNsPrefixContainer xmlNsPrefixContainer;
	
	
	public GenericJavaXmlSchema(JaxbPackageInfo parent) {
		super(parent);
		this.specifiedNamespace = this.getResourceNamespace();
		this.location = this.getResourceLocation();
		this.attributeFormDefault = this.getResourceAttributeFormDefault();
		this.elementFormDefault = this.getResourceElementFormDefault();
		this.xmlNsPrefixContainer = new XmlNsPrefixContainer();
	}
	
	
	// ********** synchronize/update **********
	
	public void synchronizeWithResourceModel() {
		this.setSpecifiedNamespace_(this.getResourceNamespace());
		this.setLocation_(this.getResourceLocation());
		this.setAttributeFormDefault_(this.getResourceAttributeFormDefault());
		this.setElementFormDefault_(this.getResourceElementFormDefault());
		this.syncXmlNsPrefixes();
	}
	
	public void update() {
		this.updateXmlNsPrefixes();
	}
	
	@Override
	public JaxbPackageInfo getParent() {
		return (JaxbPackageInfo) super.getParent();
	}
	
	protected JavaResourcePackage getResourcePackage() {
		return getParent().getResourcePackage();
	}
	
	
	// ********** xml schema annotation **********
	
	protected XmlSchemaAnnotation getXmlSchemaAnnotation() {
		return (XmlSchemaAnnotation) this.getResourcePackage().getNonNullAnnotation(XmlSchemaAnnotation.ANNOTATION_NAME);
	}
	
	// ********** namespace **********
	
	public String getNamespace() {
		return (this.specifiedNamespace == null) ? "" : this.specifiedNamespace;
	}
	
	public String getSpecifiedNamespace() {
		return this.specifiedNamespace;
	}

	public void setSpecifiedNamespace(String namespace) {
		this.getXmlSchemaAnnotation().setNamespace(namespace);
		this.setSpecifiedNamespace_(namespace);	
	}
	
	protected void setSpecifiedNamespace_(String namespace) {
		String old = this.specifiedNamespace;
		this.specifiedNamespace = namespace;
		this.firePropertyChanged(SPECIFIED_NAMESPACE_PROPERTY, old, namespace);
	}
	
	protected String getResourceNamespace() {
		return getXmlSchemaAnnotation().getNamespace();
	}
	
	
	// ********** location **********
	
	public String getLocation() {
		return this.location;
	}
	
	public void setLocation(String location) {
		this.getXmlSchemaAnnotation().setLocation(location);
		this.setLocation_(location);	
	}
	
	protected void setLocation_(String location) {
		String old = this.location;
		this.location = location;
		this.firePropertyChanged(LOCATION_PROPERTY, old, location);
	}
	
	protected String getResourceLocation() {
		return getXmlSchemaAnnotation().getLocation();
	}
	
	
	// ********** attribute form default **********
	
	public XmlNsForm getAttributeFormDefault() {
		return this.attributeFormDefault;
	}
	
	public void setAttributeFormDefault(XmlNsForm xmlNsForm) {
		this.getXmlSchemaAnnotation().setAttributeFormDefault(XmlNsForm.toJavaResourceModel(xmlNsForm));
		this.setAttributeFormDefault_(xmlNsForm);
	}
	
	protected void setAttributeFormDefault_(XmlNsForm xmlNsForm) {
		XmlNsForm old = this.attributeFormDefault;
		this.attributeFormDefault = xmlNsForm;
		this.firePropertyChanged(ATTRIBUTE_FROM_DEFAULT_PROPERTY, old, xmlNsForm);
	}
	
	protected XmlNsForm getResourceAttributeFormDefault() {
		return XmlNsForm.fromJavaResourceModel(getXmlSchemaAnnotation().getAttributeFormDefault());
	}
	
	
	// ********** element form default **********
	
	public XmlNsForm getElementFormDefault() {
		return this.elementFormDefault;
	}
	
	public void setElementFormDefault(XmlNsForm xmlNsForm) {
		this.getXmlSchemaAnnotation().setElementFormDefault(XmlNsForm.toJavaResourceModel(xmlNsForm));
		this.setElementFormDefault_(xmlNsForm);
	}
	
	protected void setElementFormDefault_(XmlNsForm xmlNsForm) {
		XmlNsForm old = this.elementFormDefault;
		this.elementFormDefault = xmlNsForm;
		this.firePropertyChanged(ELEMENT_FROM_DEFAULT_PROPERTY, old, xmlNsForm);
	}
	
	protected XmlNsForm getResourceElementFormDefault() {
		return XmlNsForm.fromJavaResourceModel(getXmlSchemaAnnotation().getElementFormDefault());
	}
	
	
	// ********** xml namespace prefixes **********
	
	public ListIterable<XmlNs> getXmlNsPrefixes() {
		return this.xmlNsPrefixContainer.getContextElements();
	}
	
	public int getXmlNsPrefixesSize() {
		return this.xmlNsPrefixContainer.getContextElementsSize();
	}
	
	public XmlNs addXmlNsPrefix(int index) {
		XmlNsAnnotation annotation = this.getXmlSchemaAnnotation().addXmlns(index);
		return this.xmlNsPrefixContainer.addContextElement(index, annotation);
	}
	
	public void removeXmlNsPrefix(XmlNs xmlNsPrefix) {
		this.removeXmlNsPrefix(this.xmlNsPrefixContainer.indexOfContextElement(xmlNsPrefix));
	}
	
	public void removeXmlNsPrefix(int index) {
		this.getXmlSchemaAnnotation().removeXmlns(index);
		this.xmlNsPrefixContainer.removeContextElement(index);
	}
	
	public void moveXmlNsPrefix(int targetIndex, int sourceIndex) {
		this.getXmlSchemaAnnotation().moveXmlns(targetIndex, sourceIndex);
		this.xmlNsPrefixContainer.moveContextElement(targetIndex, sourceIndex);
	}
	
	protected XmlNs buildXmlNs(XmlNsAnnotation xmlNsAnnotation) {
		return this.getFactory().buildJavaXmlNs(this, xmlNsAnnotation);
	}
	
	protected void syncXmlNsPrefixes() {
		this.xmlNsPrefixContainer.synchronizeWithResourceModel();
	}
	
	protected void updateXmlNsPrefixes() {
		this.xmlNsPrefixContainer.update();
	}

	protected ListIterable<XmlNsAnnotation> getXmlNsAnnotations() {
		return getXmlSchemaAnnotation().getXmlns();
	}
	
	
	// **************** 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;
		}
		
		if (namespaceTouches(pos, astRoot)) {
			return getNamespaceProposals(filter);
		}
		
		return EmptyIterable.instance();
	}
	
	protected boolean namespaceTouches(int pos, CompilationUnit astRoot) {
		return getXmlSchemaAnnotation().namespaceTouches(pos, astRoot);
	}
	
	protected Iterable<String> getNamespaceProposals(Filter<String> filter) {
		return StringTools.convertToJavaStringLiterals(
				new FilteringIterable<String>(
						getJaxbProject().getSchemaLibrary().getSchemaLocations().keySet(), filter));
	}
	
	
	// **************** validation ********************************************
	
	@Override
	public TextRange getValidationTextRange(CompilationUnit astRoot) {
		return getXmlSchemaAnnotation().getTextRange(astRoot);
	}
	
	
	/**
	 * xml ns prefix container adapter
	 */
	protected class XmlNsPrefixContainer
			extends ContextListContainer<XmlNs, XmlNsAnnotation> {
		
		@Override
		protected String getContextElementsPropertyName() {
			return XML_NS_PREFIXES_LIST;
		}
		
		@Override
		protected XmlNs buildContextElement(XmlNsAnnotation resourceElement) {
			return GenericJavaXmlSchema.this.buildXmlNs(resourceElement);
		}
		
		@Override
		protected ListIterable<XmlNsAnnotation> getResourceElements() {
			return GenericJavaXmlSchema.this.getXmlNsAnnotations();
		}
		
		@Override
		protected XmlNsAnnotation getResourceElement(XmlNs contextElement) {
			return contextElement.getResourceXmlNs();
		}
	}
}