/*-
 * ============LICENSE_START=======================================================
 * PolicyEngineAPI
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. 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.
 * ============LICENSE_END=========================================================
 */

package org.onap.policy.std.test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.onap.policy.api.UpdateType;
import org.onap.policy.std.NotificationUnMarshal;
import org.onap.policy.std.StdLoadedPolicy;
import org.onap.policy.std.StdPDPNotification;
import org.onap.policy.std.StdRemovedPolicy;

import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * The class <code>NotificationUnMarshalTest</code> contains tests for the class
 * <code>{@link NotificationUnMarshal}</code>.
 *
 * @generatedBy CodePro at 6/1/16 1:40 PM
 * @version $Revision: 1.0 $
 */
public class NotificationUnMarshalTest {
    private static final String EMPTY_STRING = "";

    private static final String POLICY_NAME = "ONAP";

    private static final String POLICY_VERSION = "1.0.0";

    /**
     * Run the StdPDPNotification notificationJSON(String) method test.
     *
     * @throws Exception
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    @Test(expected = JsonMappingException.class)
    public void testNotificationJSON_EmptyString_ShouldThrowException() throws Exception {
        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(EMPTY_STRING);

        assertNotNull(result);
    }

    @Test
    public void testNotificationJSON_StdPDPNotificationJsonStringWithEmptyLoadedAndRemovedPolicies_emptyLoadedPolices()
            throws Exception {
        final String json = getPDPNotificationAsJsonString(new StdPDPNotification());

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        assertNotNull(result);
        assertTrue(result.getLoadedPolicies().isEmpty());
    }

    @Test
    public void testNotificationJSON_StdPDPNotificationJsonStringWithEmptyLoadedpolicy_emptyLoadedPolices()
            throws Exception {
        final StdPDPNotification notification = getPDPNotification(
                Arrays.asList(getRemovedPolicy(POLICY_VERSION, POLICY_NAME)), Collections.emptyList());
        final String json = getPDPNotificationAsJsonString(notification);

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        assertNotNull(result);
        assertTrue(result.getLoadedPolicies().isEmpty());
    }

    @Test
    public void testNotificationJSON_validPDPNotificationJsonStringWithRemovedAndLoadedPolicies_UpdateTypeUpdateAndLoadedPolicyAdded()
            throws Exception {
        final List<StdRemovedPolicy> removedPolicies = Arrays.asList(getRemovedPolicy(POLICY_VERSION, POLICY_NAME));
        final List<StdLoadedPolicy> loadedPolicies = Arrays.asList(getStdLoadedPolicy(POLICY_VERSION, POLICY_NAME));
        final StdPDPNotification notification = getPDPNotification(removedPolicies, loadedPolicies);

        final String json = getPDPNotificationAsJsonString(notification);

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        assertNotNull(result);
        assertFalse(result.getLoadedPolicies().isEmpty());

        final StdLoadedPolicy actualPolicy = (StdLoadedPolicy) result.getLoadedPolicies().iterator().next();
        assertEquals(POLICY_VERSION, actualPolicy.getVersionNo());
        assertEquals(POLICY_NAME, actualPolicy.getPolicyName());
        assertEquals(UpdateType.UPDATE, actualPolicy.getUpdateType());
    }

    /**
     * Run the StdPDPNotification notificationJSON(String) method test.
     *
     * @throws Exception
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    @Test
    public void testNotificationJSON_validPDPNotificationJsonStringWithRemovedAndLoadedPolicies_UpdateTypeNewAndLoadedPolicyAdded()
            throws Exception {
        final List<StdRemovedPolicy> removedPolicies = Arrays.asList(getRemovedPolicy(POLICY_VERSION, "Something"));
        final List<StdLoadedPolicy> loadedPolices = Arrays.asList(getStdLoadedPolicy(POLICY_VERSION, POLICY_NAME));
        final StdPDPNotification notification = getPDPNotification(removedPolicies, loadedPolices);

        final String json = getPDPNotificationAsJsonString(notification);

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        assertNotNull(result);
        assertFalse(result.getLoadedPolicies().isEmpty());

        final StdLoadedPolicy actualPolicy = (StdLoadedPolicy) result.getLoadedPolicies().iterator().next();
        assertEquals(POLICY_VERSION, actualPolicy.getVersionNo());
        assertEquals(POLICY_NAME, actualPolicy.getPolicyName());
        assertEquals(UpdateType.NEW, actualPolicy.getUpdateType());
    }

    @Test
    public void testNotificationJSON_validPDPNotificationJsonStringLoadedPoliciesAndNullRemovedPolicies_UpdateTypeNewAndLoadedPolicyAdded()
            throws Exception {
        final List<StdLoadedPolicy> loadedPolices = Arrays.asList(getStdLoadedPolicy(POLICY_VERSION, POLICY_NAME));
        final StdPDPNotification notification = getPDPNotification(null, loadedPolices);

        final String json = getPDPNotificationAsJsonString(notification);

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        assertNotNull(result);
        assertFalse(result.getLoadedPolicies().isEmpty());

        final StdLoadedPolicy actualPolicy = (StdLoadedPolicy) result.getLoadedPolicies().iterator().next();
        assertEquals(POLICY_VERSION, actualPolicy.getVersionNo());
        assertEquals(POLICY_NAME, actualPolicy.getPolicyName());
        assertEquals(UpdateType.NEW, actualPolicy.getUpdateType());
    }

    /**
     * Run the StdPDPNotification notificationJSON(String) method test.
     *
     * @throws Exception
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    @Test(expected = com.fasterxml.jackson.databind.JsonMappingException.class)
    public void testNotificationJSON_7() throws Exception {
        final String json = EMPTY_STRING;

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        // add additional test code here
        assertNotNull(result);
    }

    /**
     * Run the StdPDPNotification notificationJSON(String) method test.
     *
     * @throws Exception
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    @Test(expected = com.fasterxml.jackson.databind.JsonMappingException.class)
    public void testNotificationJSON_8() throws Exception {
        final String json = EMPTY_STRING;

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        // add additional test code here
        assertNotNull(result);
    }

    /**
     * Run the StdPDPNotification notificationJSON(String) method test.
     *
     * @throws Exception
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    @Test(expected = com.fasterxml.jackson.databind.JsonMappingException.class)
    public void testNotificationJSON_9() throws Exception {
        final String json = EMPTY_STRING;

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        // add additional test code here
        assertNotNull(result);
    }

    /**
     * Run the StdPDPNotification notificationJSON(String) method test.
     *
     * @throws Exception
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    @Test(expected = com.fasterxml.jackson.databind.JsonMappingException.class)
    public void testNotificationJSON_10() throws Exception {
        final String json = EMPTY_STRING;

        final StdPDPNotification result = NotificationUnMarshal.notificationJSON(json);

        // add additional test code here
        assertNotNull(result);
    }

    private String getPDPNotificationAsJsonString(final StdPDPNotification notification) {
        final ObjectMapper mapper = new ObjectMapper();

        try {
            return mapper.writeValueAsString(notification);
        } catch (final Exception expection) {
            throw new RuntimeException(expection);
        }

    }

    private StdPDPNotification getPDPNotification(final Collection<StdRemovedPolicy> removedPolicies,
            final Collection<StdLoadedPolicy> loadedPolicies) {
        final StdPDPNotification oldNotification = new StdPDPNotification();
        oldNotification.setLoadedPolicies(loadedPolicies);
        oldNotification.setRemovedPolicies(removedPolicies);
        return oldNotification;
    }

    private StdRemovedPolicy getRemovedPolicy(final String version, final String policyName) {
        return new StdRemovedPolicy() {

            @Override
            public String getVersionNo() {
                return version;
            }

            @Override
            public String getPolicyName() {
                return policyName;
            }
        };
    }

    private StdLoadedPolicy getStdLoadedPolicy(final String version, final String policyName) {
        return new StdLoadedPolicy() {

            @Override
            public String getVersionNo() {
                return version;
            }

            @Override
            public String getPolicyName() {
                return policyName;
            }

            @Override
            public Map<String, String> getMatches() {
                return Collections.emptyMap();
            }
        };
    }

    /**
     * Perform pre-test initialization.
     *
     * @throws Exception
     *             if the initialization fails for some reason
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    @Before
    public void setUp() throws Exception {
        // add additional set up code here
    }

    /**
     * Perform post-test clean-up.
     *
     * @throws Exception
     *             if the clean-up fails for some reason
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    @After
    public void tearDown() throws Exception {
        // Add additional tear down code here
    }

    /**
     * Launch the test.
     *
     * @param args
     *            the command line arguments
     *
     * @generatedBy CodePro at 6/1/16 1:40 PM
     */
    public static void main(final String[] args) {
        new org.junit.runner.JUnitCore().run(NotificationUnMarshalTest.class);
    }
}