/*
 * Copyright 2012-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.geequery.springdata.repository.config;


import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Locale;

import javax.persistence.Entity;
import javax.persistence.MappedSuperclass;

import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.context.annotation.AnnotationConfigUtils;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.data.repository.config.AnnotationRepositoryConfigurationSource;
import org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport;
import org.springframework.data.repository.config.RepositoryConfigurationSource;
import org.springframework.data.repository.config.XmlRepositoryConfigurationSource;
import org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor;
import org.springframework.util.StringUtils;

import com.github.geequery.springdata.repository.GqRepository;
import com.github.geequery.springdata.repository.support.GqRepositoryFactoryBean;

public class GqRepositoryConfigExtension extends RepositoryConfigurationExtensionSupport {

	private static final Class<?> PAB_POST_PROCESSOR = PersistenceAnnotationBeanPostProcessor.class;
	private static final String DEFAULT_TRANSACTION_MANAGER_BEAN_NAME = "transactionManager";
	private static final String ENABLE_DEFAULT_TRANSACTIONS_ATTRIBUTE = "enableDefaultTransactions";

	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport#getModuleName()
	 */
	@Override
	public String getModuleName() {
		return "GeeQuery";
	}

	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config14.RepositoryConfigurationExtension#getRepositoryInterface()
	 */
	public String getRepositoryFactoryClassName() {
		return GqRepositoryFactoryBean.class.getName();
	}

	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config14.RepositoryConfigurationExtensionSupport#getModulePrefix()
	 */
	@Override
	protected String getModulePrefix() {
		return getModuleName().toLowerCase(Locale.US);
	}

	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport#getIdentifyingAnnotations()
	 */
	@Override
	protected Collection<Class<? extends Annotation>> getIdentifyingAnnotations() {
		return Arrays.asList(Entity.class, MappedSuperclass.class);
	}

	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport#getIdentifyingTypes()
	 */
	@Override
	protected Collection<Class<?>> getIdentifyingTypes() {
		return Collections.<Class<?>> singleton(GqRepository.class);
	}

	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport#postProcess(org.springframework.beans.factory.support.BeanDefinitionBuilder, org.springframework.data.repository.config.RepositoryConfigurationSource)
	 */
	@Override
	public void postProcess(BeanDefinitionBuilder builder, RepositoryConfigurationSource source) {

		String transactionManagerRef = source.getAttribute("transactionManagerRef");
		builder.addPropertyValue("transactionManager",
				transactionManagerRef == null ? DEFAULT_TRANSACTION_MANAGER_BEAN_NAME : transactionManagerRef);
	}

	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport#postProcess(org.springframework.beans.factory.support.BeanDefinitionBuilder, org.springframework.data.repository.config.AnnotationRepositoryConfigurationSource)
	 */
	@Override
	public void postProcess(BeanDefinitionBuilder builder, AnnotationRepositoryConfigurationSource config) {

		AnnotationAttributes attributes = config.getAttributes();

		builder.addPropertyValue(ENABLE_DEFAULT_TRANSACTIONS_ATTRIBUTE,
				attributes.getBoolean(ENABLE_DEFAULT_TRANSACTIONS_ATTRIBUTE));
	}

	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport#postProcess(org.springframework.beans.factory.support.BeanDefinitionBuilder, org.springframework.data.repository.config.XmlRepositoryConfigurationSource)
	 */
	@Override
	public void postProcess(BeanDefinitionBuilder builder, XmlRepositoryConfigurationSource config) {

		String enableDefaultTransactions = config.getAttribute(ENABLE_DEFAULT_TRANSACTIONS_ATTRIBUTE);

		if (StringUtils.hasText(enableDefaultTransactions)) {
			builder.addPropertyValue(ENABLE_DEFAULT_TRANSACTIONS_ATTRIBUTE, enableDefaultTransactions);
		}
	}

	public static final String EM_BEAN_DEFINITION_REGISTRAR_POST_PROCESSOR_BEAN_NAME = "emBeanDefinitionRegistrarPostProcessor";
	/* 
	 * (non-Javadoc)
	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport#registerBeansForRoot(org.springframework.beans.factory.support.BeanDefinitionRegistry, org.springframework.data.repository.config.RepositoryConfigurationSource)
	 */
	@Override
	public void registerBeansForRoot(BeanDefinitionRegistry registry, RepositoryConfigurationSource config) {

		super.registerBeansForRoot(registry, config);

		Object source = config.getSource();

		registerIfNotAlreadyRegistered(new RootBeanDefinition(PAB_POST_PROCESSOR), registry,
				AnnotationConfigUtils.PERSISTENCE_ANNOTATION_PROCESSOR_BEAN_NAME, source);

//		RootBeanDefinition contextDefinition = new RootBeanDefinition(DefaultGqContext.class);
//		contextDefinition.setAutowireMode(AbstractBeanDefinition.AUTOWIRE_CONSTRUCTOR);
	}
}