package software.amazon.vpclattice.resourcepolicy;

import org.assertj.core.api.AssertionsForClassTypes;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import org.mockito.junit.jupiter.MockitoExtension;
import software.amazon.awssdk.services.vpclattice.VpcLatticeClient;
import software.amazon.awssdk.services.vpclattice.model.AccessDeniedException;
import software.amazon.awssdk.services.vpclattice.model.ConflictException;
import software.amazon.awssdk.services.vpclattice.model.InternalServerException;
import software.amazon.awssdk.services.vpclattice.model.PutResourcePolicyResponse;
import software.amazon.awssdk.services.vpclattice.model.ResourceNotFoundException;
import software.amazon.awssdk.services.vpclattice.model.ServiceQuotaExceededException;
import software.amazon.awssdk.services.vpclattice.model.ThrottlingException;
import software.amazon.awssdk.services.vpclattice.model.ValidationException;
import software.amazon.cloudformation.exceptions.CfnAlreadyExistsException;
import software.amazon.cloudformation.proxy.AmazonWebServicesClientProxy;
import software.amazon.cloudformation.proxy.HandlerErrorCode;
import software.amazon.cloudformation.proxy.OperationStatus;
import software.amazon.cloudformation.proxy.ResourceHandlerRequest;

import javax.annotation.Nonnull;
import java.time.Duration;
import java.util.stream.Stream;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;

@ExtendWith(MockitoExtension.class)
public class CreateHandlerTest extends BaseTest {
    @BeforeEach
    public void setup() {
        proxy = spy(new AmazonWebServicesClientProxy(logger, MOCK_CREDENTIALS, () -> Duration.ofSeconds(1000).toMillis()));
        client = mock(VpcLatticeClient.class);
        proxyClient = MOCK_PROXY_CLIENT(proxy, client);
        handler = new CreateHandler();
        mockProxyClient();
    }

    @Test
    public void handleRequest_allApiCallsSuccess_successEvent() {
        final var request = getRequest();

        mockSdkReturn(getResourcePolicy(), getResourcePolicy(POLICY));
        mockSdkReturn(createResourcePolicy());

        final var response = handler.handleRequest(proxy, request, null, logger);

        AssertionsForClassTypes.assertThat(response).isNotNull();
        AssertionsForClassTypes.assertThat(response.getStatus()).isEqualTo(OperationStatus.SUCCESS);

        AssertionsForClassTypes.assertThat(response.getResourceModel()).isNotNull();
        AssertionsForClassTypes.assertThat(response.getResourceModel().getResourceArn()).isEqualTo(RESOURCE_ARN);
        AssertionsForClassTypes.assertThat(response.getResourceModel().getPolicy()).isEqualTo(POLICY);
    }

    @Test
    public void handleRequest_policyAlreadyExisted_throwCfnAlreadyExistException() {
        final var request = getRequest();

        mockSdkReturn(getResourcePolicy(POLICY));

        assertThatThrownBy(() -> handler.handleRequest(proxy, request, null, logger))
                .isInstanceOf(CfnAlreadyExistsException.class);
    }

    @ParameterizedTest
    @MethodSource("provideCreateExceptions")
    public void handleRequest_createCallThrowsException_throwEquivalentHandlerErrorCode(
            @Nonnull final Throwable exception,
            @Nonnull final HandlerErrorCode cloudFormationErrorCode) {
        final var request = getRequest();

        mockSdkGetThrow(ResourceNotFoundException.class);
        mockSdkPutThrow(exception);

        final var response =
                handler.handleRequest(proxy, request, null, logger);

        assertThat(response).isNotNull();
        assertThat(response.getStatus()).isEqualTo(OperationStatus.FAILED);
        assertThat(response.getErrorCode()).isEqualTo(cloudFormationErrorCode);
    }

    private ResourceModel getModel() {
        return ResourceModel.builder()
                .resourceArn(RESOURCE_ARN)
                .policy(POLICY)
                .build();
    }

    private ResourceHandlerRequest<ResourceModel> getRequest() {
        return ResourceHandlerRequest.<ResourceModel>builder()
                .awsAccountId(AWS_ACCOUNT_ID)
                .region(REGION)
                .desiredResourceState(getModel())
                .build();
    }

    private static PutResourcePolicyResponse createResourcePolicy() {
        return PutResourcePolicyResponse.builder()
                .build();
    }

    public static Stream<Arguments> provideCreateExceptions() {
        return Stream.of(
                Arguments.of(ValidationException.builder().build(), HandlerErrorCode.InvalidRequest),
                Arguments.of(software.amazon.awssdk.services.vpclattice.model.ConflictException.builder().message("").build(), HandlerErrorCode.InvalidRequest),
                Arguments.of(AccessDeniedException.builder().build(), HandlerErrorCode.AccessDenied),
                Arguments.of(InternalServerException.builder().build(), HandlerErrorCode.ServiceInternalError),
                Arguments.of(ServiceQuotaExceededException.builder().build(), HandlerErrorCode.ServiceLimitExceeded),
                Arguments.of(ThrottlingException.builder().build(), HandlerErrorCode.Throttling),
                Arguments.of(new IllegalStateException(""), HandlerErrorCode.InternalFailure),
                Arguments.of(ConflictException.builder().message("already exists").build(), HandlerErrorCode.AlreadyExists)
        );
    }
}