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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.tuscany.container.dataaccess;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.apache.tuscany.spi.builder.BuilderConfigException;
import org.apache.tuscany.spi.component.Component;
import org.apache.tuscany.spi.component.CompositeComponent;
import org.apache.tuscany.spi.component.ScopeContainer;
import org.apache.tuscany.spi.deployer.DeploymentContext;
import org.apache.tuscany.spi.extension.ComponentBuilderExtension;
import org.apache.tuscany.spi.model.ComponentDefinition;
import org.apache.tuscany.spi.model.PropertyValue;
import org.apache.tuscany.spi.model.Scope;
import org.apache.tuscany.spi.model.ServiceDefinition;

/**
 * Extension point for creating {@link DataAccessComponent}s from an assembly configuration
 */
public class DataAccessComponentBuilder extends ComponentBuilderExtension<DataAccessImplementation> {

   protected Class<DataAccessImplementation> getImplementationType() {
        return DataAccessImplementation.class;
    }

    @SuppressWarnings("unchecked")
    public Component build(CompositeComponent parent,
                              ComponentDefinition<DataAccessImplementation> componentDefinition,
                              DeploymentContext deploymentContext) throws BuilderConfigException {

        String name = componentDefinition.getName();
        DataAccessImplementation implementation = componentDefinition.getImplementation();
        DataAccessComponentType componentType = implementation.getComponentType();

        // get list of services provided by this component
        Collection<ServiceDefinition> collection = componentType.getServices().values();
        List<Class<?>> services = new ArrayList<Class<?>>(collection.size());
        for (ServiceDefinition serviceDefinition : collection) {
            services.add(serviceDefinition.getServiceContract().getInterfaceClass());
        }
        
         
        //TODO: have ComponentBuilderExtension pass ScopeContainer in on build method?
        ScopeContainer scopeContainer;
        Scope scope = componentType.getLifecycleScope();
        if (Scope.COMPOSITE == scope) {
            scopeContainer = deploymentContext.getCompositeScope();
        } else {
            scopeContainer = scopeRegistry.getScopeContainer(scope);
        }


        //removed per jim's comments
        //Map<String, Object> propertyValues = new Hashtable<String, Object>();
        //Collection<PropertyValue<?>> propValueSettings = componentDefinition.getPropertyValues().values();
        //for (PropertyValue propertyValue : propValueSettings) {
        //    propertyValues.put(propertyValue.getName(), propertyValue.getValueFactory().getInstance());
        //}        

        String dasConfig = implementation.getDasConfig();
        InputStream dasConfigStream = implementation.getDasConfigStream();
        String dataAccessType = implementation.getDataAccessType();
        ClassLoader cl = implementation.getClassLoader();
        
        DataAccessInstanceFactory instanceFactory = new DataAccessInstanceFactory(dasConfig, dasConfigStream, dataAccessType, cl);
        

        //get the properties for the component
        for (PropertyValue propertyValue : componentDefinition.getPropertyValues().values()) {
            //TODO this is not safe for since multiple instances can share mutable properties
            instanceFactory.addContextObjectFactory(propertyValue.getName(), propertyValue.getValueFactory ());
        }

        
         
        DataAccessComponentConfiguration config = new DataAccessComponentConfiguration();
        config.setName(name);
        config.setFactory(instanceFactory);
        config.setServices(services);
        config.setParent(parent);
        config.setScopeContainer(scopeContainer);
        config.setWireService(wireService);
        config.setWorkContext(workContext);
        config.setWorkScheduler(workScheduler);
        
        return new DataAccessComponent(config); 
    }
}