/*
 * 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.nifi.reporting;

import org.apache.nifi.attribute.expression.language.StandardPropertyValue;
import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.components.PropertyValue;
import org.apache.nifi.components.ValidationContext;
import org.apache.nifi.context.PropertyContext;
import org.apache.nifi.logging.ComponentLog;
import org.apache.nifi.remote.Transaction;
import org.apache.nifi.remote.TransferDirection;
import org.apache.nifi.remote.client.SiteToSiteClient;
import org.apache.nifi.reporting.s2s.SiteToSiteUtils;
import org.apache.nifi.reporting.s2s.SiteToSiteUtils.NiFiUrlValidator;
import org.apache.nifi.util.MockPropertyValue;
import org.junit.Assert;
import org.junit.Test;
import org.mockito.Mockito;
import org.mockito.stubbing.Answer;

import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonReader;
import javax.json.JsonValue;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.when;

public class TestSiteToSiteBulletinReportingTask {

    @Test
    public void testUrls() {
        final ValidationContext context = Mockito.mock(ValidationContext.class);
        Mockito.when(context.newPropertyValue(Mockito.anyString())).then((Answer<PropertyValue>) invocation -> {
            String value = (String) invocation.getArguments()[0];
            return new StandardPropertyValue(value, null, null);
        });

        assertTrue(new NiFiUrlValidator().validate("url", "http://localhost:8080/nifi", context).isValid());
        assertTrue(new NiFiUrlValidator().validate("url", "http://localhost:8080", context).isValid());
        assertFalse(new NiFiUrlValidator().validate("url", "", context).isValid());
        assertTrue(new NiFiUrlValidator().validate("url", "https://localhost:8080/nifi", context).isValid());
        assertTrue(new NiFiUrlValidator().validate("url", "https://localhost:8080/nifi,https://localhost:8080/nifi", context).isValid());
        assertTrue(new NiFiUrlValidator().validate("url", "https://localhost:8080/nifi, https://localhost:8080/nifi", context).isValid());
        assertFalse(new NiFiUrlValidator().validate("url", "http://localhost:8080/nifi, https://localhost:8080/nifi", context).isValid());
        assertTrue(new NiFiUrlValidator().validate("url", "http://localhost:8080/nifi,http://localhost:8080/nifi", context).isValid());
        assertTrue(new NiFiUrlValidator().validate("url", "http://localhost:8080/nifi,http://localhost:8080", context).isValid());
    }

    @Test
    public void testSerializedForm() throws IOException, InitializationException {
        // creating the list of bulletins
        final List<Bulletin> bulletins = new ArrayList<>();
        bulletins.add(BulletinFactory.createBulletin("group-id", "group-name", "source-id", ComponentType.PROCESSOR, "source-name", "category", "severity", "message", "group-path", "flowFileUuid"));

        // mock the access to the list of bulletins
        final ReportingContext context = Mockito.mock(ReportingContext.class);
        final BulletinRepository repository = Mockito.mock(BulletinRepository.class);
        Mockito.when(context.getBulletinRepository()).thenReturn(repository);
        Mockito.when(repository.findBulletins(Mockito.any(BulletinQuery.class))).thenReturn(bulletins);

        // creating reporting task
        final MockSiteToSiteBulletinReportingTask task = new MockSiteToSiteBulletinReportingTask();

        // settings properties and mocking access to properties
        final Map<PropertyDescriptor, String> properties = new HashMap<>();
        for (final PropertyDescriptor descriptor : task.getSupportedPropertyDescriptors()) {
            properties.put(descriptor, descriptor.getDefaultValue());
        }
        properties.put(SiteToSiteUtils.BATCH_SIZE, "1000");
        properties.put(SiteToSiteUtils.PLATFORM, "nifi");

        Mockito.doAnswer((Answer<PropertyValue>) invocation -> {
            final PropertyDescriptor descriptor = invocation.getArgument(0, PropertyDescriptor.class);
            return new MockPropertyValue(properties.get(descriptor));
        }).when(context).getProperty(Mockito.any(PropertyDescriptor.class));

        // setup the mock initialization context
        final ComponentLog logger = Mockito.mock(ComponentLog.class);
        final ReportingInitializationContext initContext = Mockito.mock(ReportingInitializationContext.class);
        Mockito.when(initContext.getIdentifier()).thenReturn(UUID.randomUUID().toString());
        Mockito.when(initContext.getLogger()).thenReturn(logger);

        task.initialize(initContext);
        task.onTrigger(context);

        // test checking
        assertEquals(1, task.dataSent.size());
        final String msg = new String(task.dataSent.get(0), StandardCharsets.UTF_8);
        JsonReader jsonReader = Json.createReader(new ByteArrayInputStream(msg.getBytes()));
        JsonObject bulletinJson = jsonReader.readArray().getJsonObject(0);
        assertEquals("message", bulletinJson.getString("bulletinMessage"));
        assertEquals("group-name", bulletinJson.getString("bulletinGroupName"));
        assertEquals("group-path", bulletinJson.getString("bulletinGroupPath"));
        assertEquals("flowFileUuid", bulletinJson.getString("bulletinFlowFileUuid"));
    }

    @Test
    public void testSerializedFormWithNullValues() throws IOException, InitializationException {
        // creating the list of bulletins
        final List<Bulletin> bulletins = new ArrayList<>();
        bulletins.add(BulletinFactory.createBulletin("group-id", "group-name", "source-id", "source-name", "category", "severity", "message"));

        // mock the access to the list of bulletins
        final ReportingContext context = Mockito.mock(ReportingContext.class);
        final BulletinRepository repository = Mockito.mock(BulletinRepository.class);
        Mockito.when(context.getBulletinRepository()).thenReturn(repository);
        Mockito.when(repository.findBulletins(Mockito.any(BulletinQuery.class))).thenReturn(bulletins);

        // creating reporting task
        final MockSiteToSiteBulletinReportingTask task = new MockSiteToSiteBulletinReportingTask();

        // settings properties and mocking access to properties
        final Map<PropertyDescriptor, String> properties = new HashMap<>();
        for (final PropertyDescriptor descriptor : task.getSupportedPropertyDescriptors()) {
            properties.put(descriptor, descriptor.getDefaultValue());
        }
        properties.put(SiteToSiteUtils.BATCH_SIZE, "1000");
        properties.put(SiteToSiteUtils.PLATFORM, "nifi");
        properties.put(SiteToSiteStatusReportingTask.ALLOW_NULL_VALUES, "true");

        Mockito.doAnswer((Answer<PropertyValue>) invocation -> {
            final PropertyDescriptor descriptor = invocation.getArgument(0, PropertyDescriptor.class);
            return new MockPropertyValue(properties.get(descriptor));
        }).when(context).getProperty(Mockito.any(PropertyDescriptor.class));

        // setup the mock initialization context
        final ComponentLog logger = Mockito.mock(ComponentLog.class);
        final ReportingInitializationContext initContext = Mockito.mock(ReportingInitializationContext.class);
        Mockito.when(initContext.getIdentifier()).thenReturn(UUID.randomUUID().toString());
        Mockito.when(initContext.getLogger()).thenReturn(logger);

        task.initialize(initContext);
        task.onTrigger(context);

        final String msg = new String(task.dataSent.get(0), StandardCharsets.UTF_8);
        JsonReader jsonReader = Json.createReader(new ByteArrayInputStream(msg.getBytes()));
        JsonObject bulletinJson = jsonReader.readArray().getJsonObject(0);
        assertEquals(JsonValue.NULL, bulletinJson.get("bulletinSourceType"));
    }

    private static final class MockSiteToSiteBulletinReportingTask extends SiteToSiteBulletinReportingTask {

        public MockSiteToSiteBulletinReportingTask() throws IOException {
            super();
        }

        final List<byte[]> dataSent = new ArrayList<>();

        @Override
        public void setup(PropertyContext reportContext) {
            if(siteToSiteClient == null) {
                final SiteToSiteClient client = Mockito.mock(SiteToSiteClient.class);
                final Transaction transaction = Mockito.mock(Transaction.class);

                try {
                    Mockito.doAnswer((Answer<Object>) invocation -> {
                        final byte[] data = invocation.getArgument(0, byte[].class);
                        dataSent.add(data);
                        return null;
                    }).when(transaction).send(Mockito.any(byte[].class), Mockito.any(Map.class));

                    when(client.createTransaction(Mockito.any(TransferDirection.class))).thenReturn(transaction);
                } catch (final Exception e) {
                    e.printStackTrace();
                    Assert.fail(e.toString());
                }
                siteToSiteClient = client;
            }
        }
    }
}