package software.amazon.sagemaker.imageversion;

import java.time.Duration;

import software.amazon.awssdk.awscore.exception.AwsErrorDetails;
import software.amazon.awssdk.awscore.exception.AwsServiceException;
import software.amazon.awssdk.services.sagemaker.SageMakerClient;
import software.amazon.awssdk.services.sagemaker.model.DescribeImageVersionRequest;
import software.amazon.awssdk.services.sagemaker.model.DescribeImageVersionResponse;
import software.amazon.awssdk.services.sagemaker.model.ImageVersionStatus;
import software.amazon.awssdk.services.sagemaker.model.ResourceNotFoundException;
import software.amazon.awssdk.services.sagemaker.model.SageMakerException;
import software.amazon.cloudformation.Action;
import software.amazon.cloudformation.exceptions.CfnNotFoundException;
import software.amazon.cloudformation.exceptions.CfnServiceInternalErrorException;
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 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 static org.assertj.core.api.Assertions.assertThat;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

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

    @Mock
    private AmazonWebServicesClientProxy proxy;

    @Mock
    private ProxyClient<SageMakerClient> proxyClient;

    @Mock
    private SageMakerClient sageMakerClient;

    @BeforeEach
    public void setup() {
        proxy = new AmazonWebServicesClientProxy(logger, MOCK_CREDENTIALS, () -> Duration.ofSeconds(600).toMillis());
        sageMakerClient = mock(SageMakerClient.class);
        proxyClient = MOCK_PROXY(proxy, sageMakerClient);
    }

    @Test
    public void testReadHandler_SimpleSuccess() {
        final DescribeImageVersionResponse describeImageVersionResponse =
                createDescribeResponse(ImageVersionStatus.CREATED);

        when(proxyClient.client().describeImageVersion(any(DescribeImageVersionRequest.class)))
                .thenReturn(describeImageVersionResponse);

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(createResourceModel())
                .build();
        final ProgressEvent<ResourceModel, CallbackContext> response = invokeHandler(request);

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

    @Test
    public void testReadHandler_ResourceNotFoundException() {
        when(proxyClient.client().describeImageVersion(any(DescribeImageVersionRequest.class)))
                .thenThrow(ResourceNotFoundException.class);

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(createResourceModel())
                .build();
        final Exception exception = assertThrows(CfnNotFoundException.class, () -> invokeHandler(request));

        assertThat(exception.getMessage()).isEqualTo(String.format(HandlerErrorCode.NotFound.getMessage(),
                ResourceModel.TYPE_NAME, String.format("%s/%s", TEST_IMAGE_NAME, TEST_VERSION)));
    }

    @Test
    public void testReadHandler_ServiceInternalException() {
        final AwsServiceException serviceInternalException = SageMakerException.builder()
                .awsErrorDetails(AwsErrorDetails.builder().errorCode("InternalError").build())
                .message("test error message")
                .statusCode(500)
                .build();

        when(proxyClient.client().describeImageVersion(any(DescribeImageVersionRequest.class)))
                .thenThrow(serviceInternalException);

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(createResourceModel())
                .build();
        final Exception exception = assertThrows(CfnServiceInternalErrorException.class, () -> invokeHandler(request));
        assertThat(exception.getMessage()).isEqualTo(String.format(
                HandlerErrorCode.ServiceInternalError.getMessage(), Action.READ));
    }

    private ProgressEvent<ResourceModel, CallbackContext> invokeHandler(final ResourceHandlerRequest<ResourceModel> request) {
        final ReadHandler handler = new ReadHandler();
        return handler.handleRequest(proxy, request, new CallbackContext(), proxyClient, logger);
    }
}