/*
 * 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.camel.component.aws.ddb;

import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.support.DefaultProducer;
import org.apache.camel.util.URISupport;

/**
 * A Producer which stores data into the Amazon DynamoDB Service
 * <a href="http://aws.amazon.com/dynamodb/">AWS DynamoDB</a>
 */
public class DdbProducer extends DefaultProducer {

    private transient String ddbProducerToString;
    
    public DdbProducer(Endpoint endpoint) {
        super(endpoint);
    }

    public void process(Exchange exchange) throws Exception {
        switch (determineOperation(exchange)) {
        case BatchGetItems:
            new BatchGetItemsCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case DeleteItem:
            new DeleteItemCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case DeleteTable:
            new DeleteTableCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case DescribeTable:
            new DescribeTableCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case GetItem:
            new GetItemCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case PutItem:
            new PutItemCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case Query:
            new QueryCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case Scan:
            new ScanCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case UpdateItem:
            new UpdateItemCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        case UpdateTable:
            new UpdateTableCommand(getEndpoint().getDdbClient(), getConfiguration(), exchange).execute();
            break;
        default:
            throw new IllegalArgumentException("Unsupported operation");
        }
    }

    private DdbOperations determineOperation(Exchange exchange) {
        DdbOperations operation = exchange.getIn().getHeader(DdbConstants.OPERATION, DdbOperations.class);
        return operation != null ? operation : getConfiguration().getOperation();
    }

    protected DdbConfiguration getConfiguration() {
        return getEndpoint().getConfiguration();
    }

    @Override
    public String toString() {
        if (ddbProducerToString == null) {
            ddbProducerToString = "DdbProducer[" + URISupport.sanitizeUri(getEndpoint().getEndpointUri()) + "]";
        }
        return ddbProducerToString;
    }

    @Override
    public DdbEndpoint getEndpoint() {
        return (DdbEndpoint)super.getEndpoint();
    }
}