package software.amazon.datasync.agent;

import software.amazon.awssdk.services.datasync.DataSyncClient;
import software.amazon.awssdk.services.datasync.model.CreateAgentRequest;
import software.amazon.awssdk.services.datasync.model.CreateAgentResponse;
import software.amazon.awssdk.services.datasync.model.DataSyncException;
import software.amazon.awssdk.services.datasync.model.InternalException;
import software.amazon.awssdk.services.datasync.model.InvalidRequestException;
import software.amazon.cloudformation.exceptions.CfnGeneralServiceException;
import software.amazon.cloudformation.exceptions.CfnInvalidRequestException;
import software.amazon.cloudformation.exceptions.CfnServiceInternalErrorException;
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.cloudformation.proxy.*;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.ArgumentMatchers.any;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import static software.amazon.datasync.agent.AbstractTestBase.MOCK_PROXY;

@ExtendWith(MockitoExtension.class)
public class CreateHandlerTest {

    @Mock
    private AmazonWebServicesClientProxy proxy;

    @Mock
    private ProxyClient<DataSyncClient> proxyClient;

    @Mock
    private DataSyncClient dataSyncClient;

    @Mock
    private Logger logger;

    @Mock
    private ResourceModel model;

    @BeforeEach
    public void setup() {
        proxy = mock(AmazonWebServicesClientProxy.class);
        proxyClient = MOCK_PROXY(proxy, dataSyncClient);
        logger = mock(Logger.class);
        model = mock(ResourceModel.class);
    }

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

        final CreateAgentResponse createAgentResponse = CreateAgentResponse.builder()
                .build();

        doReturn(createAgentResponse)
                .when(proxy)
                .injectCredentialsAndInvokeV2(any(CreateAgentRequest.class), any());

        ResourceModel model = buildDefaultModel();

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

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

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

    @Test
    public void handleRequest_InvalidSystemTagRequest() {
        final CreateHandler handler = new CreateHandler();

        final ResourceModel model = buildDefaultModel();

        Set<Tag> TagsWithSystemTag = new HashSet<Tag>(Arrays.asList(
                Tag.builder().key("aws:cloudformation:stackid").value("100").build()
        ));

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
                .desiredResourceState(model)
                .desiredResourceTags(Translator.translateTagsToMap(TagsWithSystemTag))
                .build();

        assertThrows(CfnInvalidRequestException.class, () -> {
            handler.handleRequest(proxy, request, null, proxyClient, logger);
        } );
    }


    @Test
    public void handleRequest_FailureInvalidRequest() {
        final CreateHandler handler = new CreateHandler();

        doThrow(InvalidRequestException.class)
                .when(proxy)
                .injectCredentialsAndInvokeV2(any(CreateAgentRequest.class), any());

        final ResourceModel model = buildDefaultModel();

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

        assertThrows(CfnInvalidRequestException.class, () -> {
            handler.handleRequest(proxy, request, null, proxyClient, logger);
        } );
    }


    @Test
    public void handleRequest_FailureInternalException() {
        final CreateHandler handler = new CreateHandler();

        doThrow(InternalException.class)
                .when(proxy)
                .injectCredentialsAndInvokeV2(any(CreateAgentRequest.class), any());

        final ResourceModel model = buildDefaultModel();

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

        assertThrows(CfnServiceInternalErrorException.class, () -> {
            handler.handleRequest(proxy, request, null, proxyClient, logger);
        } );

    }

    @Test
    public void handleRequest_FailureDataSyncException() {
        final CreateHandler handler = new CreateHandler();

        doThrow(DataSyncException.class)
                .when(proxy)
                .injectCredentialsAndInvokeV2(any(CreateAgentRequest.class), any());

        final ResourceModel model = buildDefaultModel();

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

        assertThrows(CfnGeneralServiceException.class, () -> {
            handler.handleRequest(proxy, request, null, proxyClient, logger);
        } );
    }

    private static ResourceModel buildDefaultModel() {
        final String activationKey = "12345-12345-12345-12345-12345"; // dummy activation key
        return ResourceModel.builder()
                .activationKey(activationKey)
                .agentName("MyAgent")
                .build();
    }

}