/*******************************************************************************
 * 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 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.StringTools;
import org.eclipse.jpt.common.utility.internal.iterables.EmptyIterable;
import org.eclipse.jpt.jaxb.core.context.JaxbContextNode;
import org.eclipse.jpt.jaxb.core.context.JaxbPackage;
import org.eclipse.jpt.jaxb.core.context.JaxbQName;
import org.eclipse.jpt.jaxb.core.context.XmlSchemaType;
import org.eclipse.jpt.jaxb.core.context.java.JavaContextNode;
import org.eclipse.jpt.jaxb.core.internal.JptJaxbCoreMessages;
import org.eclipse.jpt.jaxb.core.internal.validation.DefaultValidationMessages;
import org.eclipse.jpt.jaxb.core.internal.validation.JaxbValidationMessages;
import org.eclipse.jpt.jaxb.core.resource.java.QNameAnnotation;
import org.eclipse.jpt.jaxb.core.resource.java.XmlSchemaTypeAnnotation;
import org.eclipse.jpt.jaxb.core.xsd.XsdSchema;
import org.eclipse.jpt.jaxb.core.xsd.XsdTypeDefinition;
import org.eclipse.wst.validation.internal.provisional.core.IMessage;
import org.eclipse.wst.validation.internal.provisional.core.IReporter;

public abstract class GenericJavaXmlSchemaType
		extends AbstractJavaContextNode
		implements XmlSchemaType {
	
	protected final XmlSchemaTypeAnnotation annotation;
	
	protected JaxbQName qName;
	
	protected String type;
	
	
	protected GenericJavaXmlSchemaType(JaxbContextNode parent, XmlSchemaTypeAnnotation annotation) {
		super(parent);
		this.annotation = annotation;
		this.qName = buildQName();
		this.type = this.getResourceTypeString();
	}
	
	
	protected JaxbQName buildQName() {
		return new XmlSchemaTypeQName(this);
	}
	
	public JaxbQName getQName() {
		return this.qName;
	}
	
	public XmlSchemaTypeAnnotation getXmlSchemaTypeAnnotation() {
		return this.annotation;
	}

	protected abstract JaxbPackage getJaxbPackage();
	
	
	// ********** synchronize/update **********
	
	@Override
	public void synchronizeWithResourceModel() {
		super.synchronizeWithResourceModel();
		this.qName.synchronizeWithResourceModel();
		this.setType_(this.getResourceTypeString());
	}
	
	@Override
	public void update() {
		super.update();
		this.qName.update();
	}
	
	
	// ********** type **********
	
	public String getType() {
		return this.type;
	}
	
	public void setType(String location) {
		this.annotation.setType(location);
		this.setType_(location);	
	}
	
	protected void setType_(String type) {
		String old = this.type;
		this.type = type;
		this.firePropertyChanged(TYPE_PROPERTY, old, type);
	}
	
	protected String getResourceTypeString() {
		return this.annotation.getType();
	}
	
	public String getFullyQualifiedType() {
		return getXmlSchemaTypeAnnotation().getFullyQualifiedType();
	}
	
	
	// ***** misc *****
	
	public XsdTypeDefinition getXsdTypeDefinition() {
		JaxbPackage pkg = getJaxbPackage();
		XsdSchema xsdSchema = (pkg == null) ? null : pkg.getXsdSchema();
		if (xsdSchema == null) {
			return null;
		}
		
		if (! StringTools.stringIsEmpty(this.qName.getName())) {
			return xsdSchema.getTypeDefinition(this.qName.getNamespace(), this.qName.getName());
		}
		
		return null;
	}
	
	
	// ***** 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.qName.getJavaCompletionProposals(pos, filter, astRoot);
		if (! CollectionTools.isEmpty(result)) {
			return result;
		}
		
		return EmptyIterable.instance();
	}
	
	
	// ***** validation *****
	
	@Override
	public TextRange getValidationTextRange(CompilationUnit astRoot) {
		return this.annotation.getTextRange(astRoot);
	}
	
	@Override
	public void validate(List<IMessage> messages, IReporter reporter, CompilationUnit astRoot) {
		super.validate(messages, reporter, astRoot);
		
		this.qName.validate(messages, reporter, astRoot);
		
		XsdTypeDefinition xsdType = getXsdTypeDefinition();
		if (xsdType != null && xsdType.getKind() != XsdTypeDefinition.Kind.SIMPLE) {
			messages.add(
					DefaultValidationMessages.buildMessage(
							IMessage.HIGH_SEVERITY,
							JaxbValidationMessages.XML_SCHEMA_TYPE__NON_SIMPLE_TYPE,
							new String[] { qName.getName() },
							this,
							getValidationTextRange(astRoot)));
		}
	}
	
	protected TextRange getTypeTextRange(CompilationUnit astRoot) {
		return getXmlSchemaTypeAnnotation().getTypeTextRange(astRoot);
	}
	
	
	protected class XmlSchemaTypeQName
			extends AbstractJavaQName {
		
		protected XmlSchemaTypeQName(JavaContextNode parent) {
			super(parent, new QNameAnnotationProxy());
		}
		
		
		@Override
		protected JaxbPackage getJaxbPackage() {
			return GenericJavaXmlSchemaType.this.getJaxbPackage();
		}
		
		@Override
		protected String getReferencedComponentTypeDescription() {
			return JptJaxbCoreMessages.XML_TYPE_DESC;
		}
		
		@Override
		public String getDefaultName() {
			return null;
		}
		
		@Override
		public String getDefaultNamespace() {
			return XmlSchemaType.DEFAULT_NAMESPACE;
		}
		
		@Override
		protected Iterable<String> getNamespaceProposals(Filter<String> filter) {
			XsdSchema schema = this.getXsdSchema();
			if (schema == null) {
				return EmptyIterable.instance();
			}
			return schema.getNamespaceProposals(filter);
		}
		
		@Override
		protected Iterable<String> getNameProposals(Filter<String> filter) {
			XsdSchema schema = this.getXsdSchema();
			if (schema == null) {
				return EmptyIterable.instance();
			}
			return schema.getSimpleTypeNameProposals(getNamespace(), filter);
		}
		
		@Override
		protected void validateReference(List<IMessage> messages, IReporter reporter, CompilationUnit astRoot) {
			String name = getName();
			String namespace = getNamespace();
			
			if (! StringTools.stringIsEmpty(name)) {
				XsdSchema schema = this.getXsdSchema();
				
				if (schema != null) {
					XsdTypeDefinition schemaType = schema.getTypeDefinition(namespace, name);
					if (schemaType == null) {
						messages.add(getUnresolveSchemaComponentMessage(astRoot));
					}
				}
			}
		}
	}
	
	
	protected class QNameAnnotationProxy 
			extends AbstractJavaQName.AbstractQNameAnnotationProxy {
		
		@Override
		protected QNameAnnotation getAnnotation(boolean createIfNull) {
			return GenericJavaXmlSchemaType.this.annotation;
		}
	}
}