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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.
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package org.apache.qpid.systest.rest;

import java.net.URLDecoder;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.qpid.server.model.Binding;
import org.apache.qpid.server.model.Exchange;

public class ExchangeRestTest extends QpidRestTestCase
{
    @Override
    public void setUp() throws Exception
    {
        super.setUp();
        getRestTestHelper().createTestQueues();
    }

    public void testGet() throws Exception
    {
        List<Map<String, Object>> exchanges = getRestTestHelper().getJsonAsList("exchange");
        assertNotNull("Exchanges cannot be null", exchanges);
        assertTrue("Unexpected number of exchanges", exchanges.size() >= EXPECTED_VIRTUALHOSTS.length * EXPECTED_EXCHANGES.length);
        for (Map<String, Object> exchange : exchanges)
        {
            Asserts.assertExchange((String) exchange.get(Exchange.NAME), (String) exchange.get(Exchange.TYPE), exchange);
        }
    }

    public void testGetHostExchanges() throws Exception
    {
        List<Map<String, Object>> exchanges = getRestTestHelper().getJsonAsList("exchange/test");
        assertNotNull("Users cannot be null", exchanges);
        assertEquals("Unexpected number of exchanges", exchanges.size(), EXPECTED_EXCHANGES.length);
        for (String exchangeName : EXPECTED_EXCHANGES)
        {
            Map<String, Object> exchange = getRestTestHelper().find(Exchange.NAME, exchangeName, exchanges);
            assertExchange(exchangeName, exchange);
        }
    }

    public void testGetHostExchangeByName() throws Exception
    {
        for (String exchangeName : EXPECTED_EXCHANGES)
        {
            Map<String, Object> exchange = getRestTestHelper().getJsonAsSingletonList("exchange/test/test/"
                    + URLDecoder.decode(exchangeName, "UTF-8"));
            assertExchange(exchangeName, exchange);
        }
    }

    public void testSetExchangeSupported() throws Exception
    {
        String exchangeName = getTestName();
        String exchangeUrl = "exchange/test/test/" + exchangeName;

        Map<String, Object> attributes = new HashMap<String, Object>();
        attributes.put(Exchange.NAME, exchangeName);
        attributes.put(Exchange.TYPE, "direct");
        int responseCode = getRestTestHelper().submitRequest(exchangeUrl, "PUT", attributes);
        assertEquals("Exchange should be created", 201, responseCode);

        Map<String, Object> exchange = getRestTestHelper().getJsonAsSingletonList(exchangeUrl);
        assertNotNull("Exchange not found", exchange);

        attributes = new HashMap<String, Object>();
        attributes.put(Exchange.NAME, exchangeName);
        attributes.put(Exchange.ALTERNATE_EXCHANGE, "amq.direct");

        responseCode = getRestTestHelper().submitRequest(exchangeUrl, "PUT", attributes);
        assertEquals("Exchange update should be supported", 200, responseCode);
        exchange = getRestTestHelper().getJsonAsSingletonList(exchangeUrl);
        assertNotNull("Exchange not found", exchange);
        assertEquals("amq.direct",exchange.get(Exchange.ALTERNATE_EXCHANGE));
    }

    private void assertExchange(String exchangeName, Map<String, Object> exchange)
    {
        assertNotNull("Exchange with name " + exchangeName + " is not found", exchange);
        String type = (String) exchange.get(Exchange.TYPE);
        Asserts.assertExchange(exchangeName, type, exchange);
        if ("direct".equals(type))
        {
            assertBindings(exchange);
        }
    }

    private void assertBindings(Map<String, Object> exchange)
    {
        @SuppressWarnings("unchecked")
        List<Map<String, Object>> bindings = (List<Map<String, Object>>) exchange.get("bindings");
        for (String queueName : RestTestHelper.EXPECTED_QUEUES)
        {
            Map<String, Object> binding = getRestTestHelper().find(Binding.NAME, queueName, bindings);
            Asserts.assertBinding(queueName, (String) exchange.get(Exchange.NAME), binding);
        }
    }

}
