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.times;
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.AddTagsToResourceRequest;
import software.amazon.awssdk.services.rds.model.AddTagsToResourceResponse;
import software.amazon.awssdk.services.rds.model.DBSubnetGroup;
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.ModifyDbSubnetGroupRequest;
import software.amazon.awssdk.services.rds.model.ModifyDbSubnetGroupResponse;
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.common.handler.HandlerConfig;
import software.amazon.rds.test.common.core.HandlerName;

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

    @Mock
    RdsClient rds;

    @Mock
    private AmazonWebServicesClientProxy proxy;

    @Mock
    private ProxyClient<RdsClient> proxyRdsClient;

    private UpdateHandler handler;

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

    @BeforeEach
    public void setup() {
        handler = new UpdateHandler(HandlerConfig.builder()
                .probingEnabled(false)
                .backoff(TEST_BACKOFF_DELAY)
                .build());
        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() {

        mockModifyCall();

        final DescribeDbSubnetGroupsResponse describeActiveDbSubnetGroupsResponse = DescribeDbSubnetGroupsResponse.builder().dbSubnetGroups(DB_SUBNET_GROUP_ACTIVE).build();
        final ListTagsForResourceResponse listTagsForResourceResponse = ListTagsForResourceResponse.builder().build();
        when(proxyRdsClient.client().listTagsForResource(any(ListTagsForResourceRequest.class))).thenReturn(listTagsForResourceResponse);
        final AddTagsToResourceResponse addTagsToResourceResponse = AddTagsToResourceResponse.builder().build();
        when(proxyRdsClient.client().addTagsToResource(any(AddTagsToResourceRequest.class))).thenReturn(addTagsToResourceResponse);

        when(proxyRdsClient.client().describeDBSubnetGroups(any(DescribeDbSubnetGroupsRequest.class))).thenReturn(describeActiveDbSubnetGroupsResponse);

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(RESOURCE_MODEL)
                .desiredResourceTags(translateTagsToMap(TAG_SET))
                .previousResourceState(ResourceModel.builder().build())
                .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()).modifyDBSubnetGroup(any(ModifyDbSubnetGroupRequest.class));
        verify(proxyRdsClient.client(), times(2)).describeDBSubnetGroups(any(DescribeDbSubnetGroupsRequest.class));
        verify(proxyRdsClient.client(), times(1)).listTagsForResource(any(ListTagsForResourceRequest.class));
        verify(proxyRdsClient.client()).addTagsToResource(any(AddTagsToResourceRequest.class));
    }

    private void mockModifyCall() {
        final ModifyDbSubnetGroupResponse modifyDbSubnetGroupResponse = ModifyDbSubnetGroupResponse.builder().dbSubnetGroup(DBSubnetGroup.builder().dbSubnetGroupArn("arn").build()).build();
        when(proxyRdsClient.client().modifyDBSubnetGroup(any(ModifyDbSubnetGroupRequest.class))).thenReturn(modifyDbSubnetGroupResponse);
    }

    @Test
    public void handleRequest_SimpleSuccessNotFound() {

        when(proxyRdsClient.client().modifyDBSubnetGroup(any(ModifyDbSubnetGroupRequest.class))).thenThrow(
                DbSubnetGroupNotFoundException.class);

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(RESOURCE_MODEL_ALTERNATIVE)
                .previousResourceState(ResourceModel.builder().build())
                .logicalResourceIdentifier("dbsubnet")
                .clientRequestToken("4b90a7e4-b791-4512-a137-0cf12a23451e")
                .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()).modifyDBSubnetGroup(any(ModifyDbSubnetGroupRequest.class));
    }

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

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(RESOURCE_MODEL)
                .previousResourceState(ResourceModel.builder().build())
                .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()).modifyDBSubnetGroup(any(ModifyDbSubnetGroupRequest.class));
    }
}