/*
 * Copyright (c) 2018, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * 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 org.wso2.extension.siddhi.execution.word.function;

import org.apache.log4j.Logger;
import org.testng.AssertJUnit;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import org.wso2.siddhi.core.SiddhiAppRuntime;
import org.wso2.siddhi.core.SiddhiManager;
import org.wso2.siddhi.core.event.Event;
import org.wso2.siddhi.core.exception.SiddhiAppCreationException;
import org.wso2.siddhi.core.query.output.callback.QueryCallback;
import org.wso2.siddhi.core.stream.input.InputHandler;
import org.wso2.siddhi.core.util.EventPrinter;
import org.wso2.siddhi.core.util.SiddhiTestHelper;

import java.util.concurrent.atomic.AtomicInteger;

public class TestCaseOfWordFunction {
    private static final Logger LOGGER = Logger.getLogger(TestCaseOfWordFunction.class);
    private AtomicInteger count = new AtomicInteger(0);
    private volatile boolean eventArrived;

    @BeforeMethod
    public void init() {
        count.set(0);
        eventArrived = false;
    }

    @Test
    public void testWordFunctionExtension() throws InterruptedException {
        LOGGER.info("WordFunctionExtension TestCase");
        SiddhiManager siddhiManager = new SiddhiManager();

        String inStreamDefinition = "define stream inputStream (word string);";
        String query = ("@info(name = 'query1') from inputStream select filter:word(word) as word " +
                "insert into outputStream;");
        SiddhiAppRuntime siddhiAppRuntime = siddhiManager.createSiddhiAppRuntime(inStreamDefinition + query);

        siddhiAppRuntime.addCallback("query1", new QueryCallback() {
            @Override
            public void receive(long timeStamp, Event[] inEvents, Event[] removeEvents) {
                EventPrinter.print(timeStamp, inEvents, removeEvents);
                for (Event event : inEvents) {
                    count.incrementAndGet();
                    if (count.get() == 1) {
                        AssertJUnit.assertEquals(true, event.getData(0));
                        eventArrived = true;
                    }
                }
            }
        });

        InputHandler inputHandler = siddhiAppRuntime.getInputHandler("inputStream");
        siddhiAppRuntime.start();
        inputHandler.send(new Object[]{"shopping"});
        SiddhiTestHelper.waitForEvents(100, 1, count, 60000);
        AssertJUnit.assertEquals(1, count.get());
        AssertJUnit.assertTrue(eventArrived);
        siddhiAppRuntime.shutdown();
    }

    @Test(expectedExceptions = SiddhiAppCreationException.class)
    public void testWordFunctionExtensionWithZeroArguments() {
        LOGGER.info("WordFunctionExtension TestCase with zero arguments");
        SiddhiManager siddhiManager = new SiddhiManager();

        String inStreamDefinition = "define stream inputStream (word string);";
        String query = ("@info(name = 'query1') from inputStream select filter:word() as country " +
                "insert into outputStream;");
        siddhiManager.createSiddhiAppRuntime(inStreamDefinition + query);
    }

    @Test(expectedExceptions = SiddhiAppCreationException.class)
    public void testWordFunctionExtensionWithInvalidDataType() {
        LOGGER.info("WordFunctionExtension TestCase with invalid data type");
        SiddhiManager siddhiManager = new SiddhiManager();

        String inStreamDefinition = "define stream inputStream (word double);";
        String query = ("@info(name = 'query1') from inputStream select filter:word(word) as word " +
                "insert into outputStream;");
        siddhiManager.createSiddhiAppRuntime(inStreamDefinition + query);
    }

    @Test
    public void testWordFunctionExtensionWithNullValue() throws InterruptedException {
        LOGGER.info("CountryFunctionExtension TestCase with null value");
        SiddhiManager siddhiManager = new SiddhiManager();

        String inStreamDefinition = "define stream inputStream (word string);";
        String query = ("@info(name = 'query1') from inputStream select filter:word(word) as country " +
                "insert into outputStream;");
        SiddhiAppRuntime siddhiAppRuntime = siddhiManager.createSiddhiAppRuntime(inStreamDefinition + query);

        InputHandler inputHandler = siddhiAppRuntime.getInputHandler("inputStream");
        siddhiAppRuntime.start();
        inputHandler.send(new Object[]{null});
        siddhiAppRuntime.shutdown();
    }
}


