package software.amazon.rds.dbsubnetgroup;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.atLeastOnce;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;

import java.security.InvalidParameterException;
import java.time.Duration;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import software.amazon.awssdk.services.rds.RdsClient;
import software.amazon.awssdk.services.rds.model.DbSubnetGroupNotFoundException;
import software.amazon.awssdk.services.rds.model.DescribeDbSubnetGroupsRequest;
import software.amazon.awssdk.services.rds.model.DescribeDbSubnetGroupsResponse;
import software.amazon.awssdk.services.rds.model.ListTagsForResourceRequest;
import software.amazon.awssdk.services.rds.model.ListTagsForResourceResponse;
import software.amazon.awssdk.services.rds.model.Tag;
import software.amazon.cloudformation.proxy.AmazonWebServicesClientProxy;
import software.amazon.cloudformation.proxy.HandlerErrorCode;
import software.amazon.cloudformation.proxy.OperationStatus;
import software.amazon.cloudformation.proxy.ProgressEvent;
import software.amazon.cloudformation.proxy.ProxyClient;
import software.amazon.cloudformation.proxy.ResourceHandlerRequest;
import software.amazon.rds.test.common.core.HandlerName;

@ExtendWith(MockitoExtension.class)
public class ReadHandlerTest extends AbstractTestBase {

    @Mock
    private AmazonWebServicesClientProxy proxy;

    @Mock
    private ProxyClient<RdsClient> proxyRdsClient;

    @Mock
    RdsClient rds;

    private ReadHandler handler;

    @Override
    public HandlerName getHandlerName() {
        return HandlerName.READ;
    }

    @BeforeEach
    public void setup() {
        handler = new ReadHandler();
        rds = mock(RdsClient.class);
        proxy = new AmazonWebServicesClientProxy(logger, MOCK_CREDENTIALS, () -> Duration.ofSeconds(600).toMillis());
        proxyRdsClient = MOCK_PROXY(proxy, rds);
    }

    @AfterEach
    public void post_execute() {
        verify(rds, atLeastOnce()).serviceName();
        verifyNoMoreInteractions(proxyRdsClient.client());
        verifyAccessPermissions(proxyRdsClient.client());
    }

    @Test
    public void handleRequest_SimpleSuccess() {

        final DescribeDbSubnetGroupsResponse describeActiveDbSubnetGroupsResponse = DescribeDbSubnetGroupsResponse.builder().dbSubnetGroups(DB_SUBNET_GROUP_ACTIVE).build();
        when(proxyRdsClient.client().describeDBSubnetGroups(any(DescribeDbSubnetGroupsRequest.class))).thenReturn(describeActiveDbSubnetGroupsResponse);
        final ListTagsForResourceResponse listTagsForResourceResponse = ListTagsForResourceResponse.builder()
                .tagList(Tag.builder().key("key").value("value").build())
                .build();
        when(proxyRdsClient.client().listTagsForResource(any(ListTagsForResourceRequest.class))).thenReturn(listTagsForResourceResponse);

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(RESOURCE_MODEL)
                .build();
        final ProgressEvent<ResourceModel, CallbackContext> response = handler.handleRequest(proxy, request, new CallbackContext(), proxyRdsClient, logger);


        assertThat(response).isNotNull();
        assertThat(response.getStatus()).isEqualTo(OperationStatus.SUCCESS);
        assertThat(response.getCallbackDelaySeconds()).isEqualTo(0);
        assertThat(response.getResourceModels()).isNull();
        assertThat(response.getMessage()).isNull();
        assertThat(response.getErrorCode()).isNull();

        verify(proxyRdsClient.client()).describeDBSubnetGroups(any(DescribeDbSubnetGroupsRequest.class));
        verify(proxyRdsClient.client()).listTagsForResource(any(ListTagsForResourceRequest.class));
    }

    @Test
    public void handleRequest_SimpleNotFound() {

        when(proxyRdsClient.client().describeDBSubnetGroups(any(DescribeDbSubnetGroupsRequest.class))).thenThrow(
                DbSubnetGroupNotFoundException.class
        );

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(RESOURCE_MODEL)
                .build();
        final ProgressEvent<ResourceModel, CallbackContext> response = handler.handleRequest(proxy, request, new CallbackContext(), proxyRdsClient, logger);


        assertThat(response).isNotNull();
        assertThat(response.getStatus()).isEqualTo(OperationStatus.FAILED);
        assertThat(response.getCallbackContext()).isNotNull();
        assertThat(response.getCallbackDelaySeconds()).isEqualTo(0);
        assertThat(response.getResourceModels()).isNull();
        assertThat(response.getMessage()).isNull();
        assertThat(response.getErrorCode()).isEqualTo(HandlerErrorCode.NotFound);

        verify(proxyRdsClient.client()).describeDBSubnetGroups(any(DescribeDbSubnetGroupsRequest.class));
    }

    @Test
    public void handleRequest_SimpleException() {
        when(proxyRdsClient.client().describeDBSubnetGroups(any(DescribeDbSubnetGroupsRequest.class))).thenThrow(
                InvalidParameterException.class
        );

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(RESOURCE_MODEL)
                .build();
        final ProgressEvent<ResourceModel, CallbackContext> response = handler.handleRequest(proxy, request, new CallbackContext(), proxyRdsClient, logger);


        assertThat(response).isNotNull();
        assertThat(response.getStatus()).isEqualTo(OperationStatus.FAILED);
        assertThat(response.getCallbackContext()).isNotNull();
        assertThat(response.getCallbackDelaySeconds()).isEqualTo(0);
        assertThat(response.getResourceModels()).isNull();
        assertThat(response.getMessage()).isNull();
        assertThat(response.getErrorCode()).isEqualTo(HandlerErrorCode.InternalFailure);

        verify(proxyRdsClient.client()).describeDBSubnetGroups(any(DescribeDbSubnetGroupsRequest.class));
    }
}