/*
 * ============LICENSE_START=======================================================
 * PNF-REGISTRATION-HANDLER
 * ================================================================================
 * Copyright (C) 2018 Nokia. 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.integration.simulators.nfsimulator.vesclient.simulator;

import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.util.Optional;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.Mock;
import org.onap.integration.simulators.nfsimulator.vesclient.event.EventData;
import org.onap.integration.simulators.nfsimulator.vesclient.event.EventDataRepository;

public class IncrementProviderImplTest {
    private IncrementProvider incrementProvider;

    @Mock
    private EventDataRepository eventDataRepositoryMock;

    @BeforeEach
    void setUp() {
        eventDataRepositoryMock = mock(EventDataRepository.class);
        incrementProvider = new IncrementProviderImpl(eventDataRepositoryMock);
    }

    @Test
    public void getAndIncrementTest() {
        ArgumentCaptor<EventData> eventDataArgumentCaptor = ArgumentCaptor.forClass(EventData.class);
        String eventId = "1";
        int initialIncrementValue = 0;
        int expectedValue = initialIncrementValue + 1;
        EventData eventData = EventData.builder().id(eventId).incrementValue(initialIncrementValue).build();
        Optional<EventData> optional = Optional.of(eventData);

        when(eventDataRepositoryMock.findById(eventId)).thenReturn(optional);

        int value = incrementProvider.getAndIncrement(eventId);

        verify(eventDataRepositoryMock).save(eventDataArgumentCaptor.capture());

        assertThat(value).isEqualTo(expectedValue);
        assertThat(eventDataArgumentCaptor.getValue().getIncrementValue()).isEqualTo(expectedValue);

    }

    @Test
    public void shouldThrowOnNonExistingEvent() {
        Optional<EventData> emptyOptional = Optional.empty();
        String nonExistingEventId = "THIS_DOES_NOT_EXIST";
        when(eventDataRepositoryMock.findById(nonExistingEventId)).thenReturn(emptyOptional);

        assertThrows(EventNotFoundException.class,
            () -> incrementProvider.getAndIncrement(nonExistingEventId));
    }
}