package software.amazon.lightsail.instance;

import java.time.Duration;

import software.amazon.awssdk.awscore.exception.AwsErrorDetails;
import software.amazon.awssdk.services.lightsail.LightsailClient;
import software.amazon.awssdk.services.lightsail.model.DeleteInstanceRequest;
import software.amazon.awssdk.services.lightsail.model.DeleteInstanceResponse;
import software.amazon.awssdk.services.lightsail.model.GetInstanceRequest;
import software.amazon.awssdk.services.lightsail.model.GetInstanceResponse;
import software.amazon.awssdk.services.lightsail.model.Instance;
import software.amazon.awssdk.services.lightsail.model.InstanceState;
import software.amazon.awssdk.services.lightsail.model.InvalidInputException;
import software.amazon.awssdk.services.lightsail.model.NotFoundException;
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.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 static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.atLeastOnce;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;

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

    @Mock
    private AmazonWebServicesClientProxy proxy;

    @Mock
    private ProxyClient<LightsailClient> proxyClient;

    @Mock
    LightsailClient sdkClient;

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

    @AfterEach
    public void tear_down() {
        verify(sdkClient, atLeastOnce()).serviceName();
        verifyNoMoreInteractions(sdkClient);
    }

    @Test
    public void handleRequest_SimpleSuccess() {
        final DeleteHandler handler = new DeleteHandler();

        final ResourceModel model = ResourceModel.builder().build();

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
            .desiredResourceState(model)
            .build();

        when(sdkClient.getInstance(any(GetInstanceRequest.class)))
                .thenReturn(GetInstanceResponse.builder()
                .instance(Instance.builder().build()).build())
                .thenReturn(GetInstanceResponse.builder()
                        .instance(Instance.builder()
                                .state(InstanceState.builder().name("Running").build()).build()).build())
                .thenThrow(NotFoundException.builder()
                        .awsErrorDetails(AwsErrorDetails
                                .builder()
                                .errorCode("NotFoundException")
                                .build())
                        .build());

        when(sdkClient.deleteInstance(any(DeleteInstanceRequest.class)))
                .thenReturn(DeleteInstanceResponse.builder().build());

        final ProgressEvent<ResourceModel, CallbackContext> response = handler.handleRequest(proxy, request, new CallbackContext(), proxyClient, logger);

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

    @Test
    public void handleRequest_deleteError() {
        final DeleteHandler handler = new DeleteHandler();

        final ResourceModel model = ResourceModel.builder().build();

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(model)
                .build();

        when(sdkClient.getInstance(any(GetInstanceRequest.class)))
                .thenReturn(GetInstanceResponse.builder()
                .instance(Instance.builder()
                        .state(InstanceState
                                .builder()
                                .name("Running")
                                .build())
                        .build())
                        .build())
                .thenReturn(GetInstanceResponse.builder()
                        .instance(Instance.builder()
                                .state(InstanceState
                                        .builder()
                                        .name("Running")
                                        .build())
                                .build())
                        .build())
                .thenThrow(NotFoundException.builder()
                        .awsErrorDetails(AwsErrorDetails.builder()
                                .errorCode("NotFoundException")
                                .build())
                        .build());

        when(sdkClient.deleteInstance(any(DeleteInstanceRequest.class)))
                .thenThrow(NotFoundException.builder()
                        .awsErrorDetails(AwsErrorDetails.builder()
                                .errorCode("NotFoundException")
                                .build())
                        .build());

        final ProgressEvent<ResourceModel, CallbackContext> response = handler.handleRequest(proxy, request, new CallbackContext(), proxyClient, logger);

        assertThat(response).isNotNull();
        assertThat(response.getStatus()).isEqualTo(OperationStatus.FAILED);
        assertThat(response.getCallbackDelaySeconds()).isEqualTo(0);
        assertThat(response.getErrorCode()).isEqualTo(HandlerErrorCode.NotFound);
    }

    @Test
    public void handleRequest_noInstance() {
        final DeleteHandler handler = new DeleteHandler();

        final ResourceModel model = ResourceModel.builder().build();

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(model)
                .build();

        doThrow(NotFoundException.builder()
                .awsErrorDetails(AwsErrorDetails
                        .builder()
                        .errorCode("NotFoundException")
                        .build())
                .build()).when(sdkClient).getInstance(any(GetInstanceRequest.class));

        final ProgressEvent<ResourceModel, CallbackContext> response = handler.handleRequest(proxy, request, new CallbackContext(), proxyClient, logger);

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