/*
 * 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.mongodb3;

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

import com.mongodb.client.MongoIterable;
import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;
import org.apache.commons.lang3.ObjectUtils;
import org.bson.Document;
import org.junit.Test;

import static org.apache.camel.component.mongodb3.MongoDbConstants.MONGO_ID;

public class MongoDbOutputTypeTest extends AbstractMongoDbTest {

    @Test
    public void testFindAllDBCursor() {
        // Test that the collection has 0 documents in it
        assertEquals(0, testCollection.count());
        pumpDataIntoTestCollection();
        // Repeat ten times, obtain 10 batches of 100 results each time
        int numToSkip = 0;
        final int limit = 100;
        for (int i = 0; i < 10; i++) {
            Map<String, Object> headers = new HashMap<>();
            headers.put(MongoDbConstants.NUM_TO_SKIP, numToSkip);
            headers.put(MongoDbConstants.LIMIT, 100);
            Object result = template.requestBodyAndHeaders("direct:findAllDBCursor", ObjectUtils.NULL, headers);
            assertTrue("Result is not of type MongoIterable", result instanceof MongoIterable);

            @SuppressWarnings("unchecked")
            MongoIterable<Document> resultCursor = (MongoIterable<Document>)result;
            // Ensure that all returned documents contain all fields
            for (Document document : resultCursor) {
                assertNotNull("Document in returned list should contain all fields", document.get(MONGO_ID));
                assertNotNull("Document in returned list should contain all fields", document.get("scientist"));
                assertNotNull("Document in returned list should contain all fields", document.get("fixedField"));
            }

            numToSkip = numToSkip + limit;
        }
    }

    @Test
    public void testFindAllDocumentList() {
        // Test that the collection has 0 documents in it
        assertEquals(0, testCollection.count());
        pumpDataIntoTestCollection();
        Object result = template.requestBody("direct:findAllDocumentList", ObjectUtils.NULL);
        assertTrue("Result is not of type List", result instanceof List);
        @SuppressWarnings("unchecked")
        List<Document> resultList = (List<Document>)result;

        assertListSize("Result does not contain 1000 elements", resultList, 1000);

        // Ensure that all returned documents contain all fields
        for (Document document : resultList) {
            assertNotNull("Document in returned list should contain all fields", document.get(MONGO_ID));
            assertNotNull("Document in returned list should contain all fields", document.get("scientist"));
            assertNotNull("Document in returned list should contain all fields", document.get("fixedField"));
        }

        for (Exchange resultExchange : getMockEndpoint("mock:resultFindAll").getReceivedExchanges()) {
            assertEquals("Result total size header should equal 1000", 1000, resultExchange.getIn().getHeader(MongoDbConstants.RESULT_TOTAL_SIZE));
        }
    }

    @Test
    public void testInitFindWithWrongOutputType() {
        try {
            RouteBuilder taillableRouteBuilder = new RouteBuilder() {
                @Override
                public void configure() throws Exception {
                    from("mongodb3:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=findById&dynamicity=true&outputType=MongoIterable")
                        .to("mock:dummy");
                }
            };
            template.getCamelContext().addRoutes(taillableRouteBuilder);
            fail("Endpoint should not be initialized with a non compatible outputType");
        } catch (Exception exception) {
            assertTrue("Exception is not of type IllegalArgumentException", exception.getCause() instanceof IllegalArgumentException);
        }
    }

    @Test
    public void testInitTailWithWrongOutputType() {
        try {
            RouteBuilder taillableRouteBuilder = new RouteBuilder() {
                @Override
                public void configure() throws Exception {
                    from("mongodb3:myDb?database={{mongodb.testDb}}&collection={{mongodb.cappedTestCollection}}&tailTrackIncreasingField=increasing&outputType=MongoIterable")
                        .id("tailableCursorConsumer1").autoStartup(false).to("mock:test");
                }
            };
            template.getCamelContext().addRoutes(taillableRouteBuilder);
            fail("Endpoint should not be initialized with a non compatible outputType");
        } catch (Exception exception) {
            assertTrue("Exception is not of type IllegalArgumentException", exception.getCause() instanceof IllegalArgumentException);
        }
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            public void configure() {

                from("direct:findAllDBCursor")
                    .to("mongodb3:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=findAll&dynamicity=true&outputType=MongoIterable")
                    .to("mock:resultFindAllDBCursor");
                from("direct:findAllDocumentList").to("mongodb3:myDb?database={{mongodb.testDb}}&collection={{mongodb.testCollection}}&operation=findAll&outputType=DocumentList")
                    .to("mock:resultFindAllDocumentList");

            }
        };
    }
}