package com.amazonaws.iotanalytics.channel;

import org.mockito.ArgumentCaptor;
import org.mockito.Captor;
import software.amazon.awssdk.services.iotanalytics.model.Channel;
import software.amazon.awssdk.services.iotanalytics.model.DescribeChannelRequest;
import software.amazon.awssdk.services.iotanalytics.model.DescribeChannelResponse;
import software.amazon.awssdk.services.iotanalytics.model.InvalidRequestException;
import software.amazon.awssdk.services.iotanalytics.model.LimitExceededException;
import software.amazon.awssdk.services.iotanalytics.model.ListTagsForResourceRequest;
import software.amazon.awssdk.services.iotanalytics.model.ListTagsForResourceResponse;
import software.amazon.awssdk.services.iotanalytics.model.ServiceManagedChannelS3Storage;
import software.amazon.awssdk.services.iotanalytics.model.ServiceUnavailableException;
import software.amazon.awssdk.services.iotanalytics.model.TagResourceRequest;
import software.amazon.awssdk.services.iotanalytics.model.TagResourceResponse;
import software.amazon.awssdk.services.iotanalytics.model.UntagResourceRequest;
import software.amazon.awssdk.services.iotanalytics.model.UntagResourceResponse;
import software.amazon.awssdk.services.iotanalytics.model.UpdateChannelRequest;
import software.amazon.awssdk.services.iotanalytics.model.UpdateChannelResponse;
import software.amazon.cloudformation.exceptions.CfnGeneralServiceException;
import software.amazon.cloudformation.exceptions.CfnInvalidRequestException;
import software.amazon.cloudformation.exceptions.CfnServiceLimitExceededException;
import software.amazon.cloudformation.proxy.HandlerErrorCode;
import software.amazon.cloudformation.proxy.OperationStatus;
import software.amazon.cloudformation.proxy.ProgressEvent;
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.junit.jupiter.MockitoExtension;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;

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.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
public class UpdateHandlerTest extends AbstractTestBase {
    private static final String TEST_CHANNEL_ARN = "test_channel_arn";
    private static final String TEST_CHANNEL_ID = TEST_CHANNEL_ARN;
    private static final String TEST_CHANNEL_NAME = "test_channel_name";
    private static final int TEST_DAYS = 10;
    private static final String TEST_KEY1 = "key1";
    private static final String TEST_VALUE1 = "value1";
    private static final String TEST_KEY2 = "key2";
    private static final String TEST_VALUE2 = "value2";
    private static final String TEST_VALUE22 = "value22";
    private static final String TEST_KEY3 = "key3";
    private static final String TEST_VALUE3 = "value3";

    @Captor
    private ArgumentCaptor<UpdateChannelRequest> updateChannelRequestArgumentCaptor;

    @Captor
    private ArgumentCaptor<TagResourceRequest> tagResourceRequestArgumentCaptor;

    @Captor
    private ArgumentCaptor<UntagResourceRequest> untagResourceRequestArgumentCaptor;

    @Captor
    private ArgumentCaptor<DescribeChannelRequest> describeChannelRequestArgumentCaptor;

    @Captor
    private ArgumentCaptor<ListTagsForResourceRequest> listTagsForResourceRequestArgumentCaptor;

    private UpdateHandler handler;
    private ResourceModel preModel;
    private ResourceModel newModel;
    private DescribeChannelResponse describeChannelResponseFull;
    private ListTagsForResourceResponse listTagsForResourceResponseFull;
    private DescribeChannelResponse describeChannelResponseSimple;
    private ListTagsForResourceResponse listTagsForResourceResponseSimple;

    @BeforeEach
    public void setup() {
        super.setUp();
        handler = new UpdateHandler();

        preModel = ResourceModel.builder()
            .channelName(TEST_CHANNEL_NAME)
            .id(TEST_CHANNEL_ID)
            .retentionPeriod(RetentionPeriod.builder().numberOfDays(TEST_DAYS).build())
            .tags(Arrays.asList(Tag.builder().key(TEST_KEY1).value(TEST_VALUE1).build(),
                Tag.builder().key(TEST_KEY2).value(TEST_VALUE2).build()))
            .build();

        newModel = ResourceModel.builder()
            .channelName(TEST_CHANNEL_NAME)
            .channelStorage(ChannelStorage
                .builder()
                .serviceManagedS3(new HashMap<>())
                .build())
            .tags(Arrays.asList(Tag.builder().key(TEST_KEY3).value(TEST_VALUE3).build(),
                Tag.builder().key(TEST_KEY2).value(TEST_VALUE22).build()))
            .build();

        describeChannelResponseFull = DescribeChannelResponse.builder().channel(
            Channel.builder()
                .name(TEST_CHANNEL_NAME)
                .arn(TEST_CHANNEL_ARN)
                .storage(software.amazon.awssdk.services.iotanalytics.model.ChannelStorage
                    .builder()
                    .serviceManagedS3(ServiceManagedChannelS3Storage.builder().build())
                    .build())
                .retentionPeriod(software.amazon.awssdk.services.iotanalytics.model.RetentionPeriod
                    .builder()
                    .numberOfDays(TEST_DAYS)
                    .build())
                .build())
            .build();

        listTagsForResourceResponseFull = ListTagsForResourceResponse.builder()
            .tags(Arrays.asList(software.amazon.awssdk.services.iotanalytics.model.Tag.builder().key(TEST_KEY1).value(TEST_VALUE1).build(),
                software.amazon.awssdk.services.iotanalytics.model.Tag.builder().key(TEST_KEY2).value(TEST_VALUE22).build(),
                software.amazon.awssdk.services.iotanalytics.model.Tag.builder().key(TEST_KEY3).value(TEST_VALUE3).build()))
            .build();

        describeChannelResponseSimple = DescribeChannelResponse.builder()
            .channel(Channel.builder().name(TEST_CHANNEL_NAME).build())
            .build();

        listTagsForResourceResponseSimple = ListTagsForResourceResponse.builder().build();
    }

    @Test
    public void GIVEN_request_WHEN_call_handleRequest_THEN_return_success() {

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
            .desiredResourceState(newModel)
            .previousResourceState(preModel)
            .build();

        when(proxyClient.client().updateChannel(updateChannelRequestArgumentCaptor.capture())).thenReturn(UpdateChannelResponse.builder().build());

        when(proxyClient.client().untagResource(untagResourceRequestArgumentCaptor.capture())).thenReturn(UntagResourceResponse.builder().build());

        when(proxyClient.client().tagResource(tagResourceRequestArgumentCaptor.capture())).thenReturn(TagResourceResponse.builder().build());

        when(proxyClient.client().describeChannel(describeChannelRequestArgumentCaptor.capture())).thenReturn(describeChannelResponseFull);

        when(proxyClient.client().listTagsForResource(listTagsForResourceRequestArgumentCaptor.capture())).thenReturn(listTagsForResourceResponseFull);

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

        // THEN
        final UpdateChannelRequest updateChannelRequest = updateChannelRequestArgumentCaptor.getValue();
        assertThat(updateChannelRequest.channelName()).isEqualTo(TEST_CHANNEL_NAME);
        assertThat(updateChannelRequest.channelStorage().serviceManagedS3()).isNotNull();
        assertThat(updateChannelRequest.channelStorage().customerManagedS3()).isNull();
        assertThat(updateChannelRequest.retentionPeriod()).isNull();

        final TagResourceRequest tagResourceRequest = tagResourceRequestArgumentCaptor.getValue();
        assertThat(tagResourceRequest.resourceArn()).isEqualTo(TEST_CHANNEL_ARN);
        assertThat(tagResourceRequest.tags().size()).isEqualTo(2);
        final List<software.amazon.awssdk.services.iotanalytics.model.Tag> tagsToAdd = new ArrayList<>(tagResourceRequest.tags());
        tagsToAdd.sort(Comparator.comparing(software.amazon.awssdk.services.iotanalytics.model.Tag::key));
        assertThat(tagsToAdd.get(0).key()).isEqualTo(TEST_KEY2);
        assertThat(tagsToAdd.get(0).value()).isEqualTo(TEST_VALUE22);
        assertThat(tagsToAdd.get(1).key()).isEqualTo(TEST_KEY3);
        assertThat(tagsToAdd.get(1).key()).isEqualTo(TEST_KEY3);

        final UntagResourceRequest untagResourceRequest = untagResourceRequestArgumentCaptor.getValue();
        assertThat(untagResourceRequest.resourceArn()).isEqualTo(TEST_CHANNEL_ARN);
        assertThat(untagResourceRequest.tagKeys().size()).isEqualTo(1);
        assertThat(untagResourceRequest.tagKeys().contains(TEST_KEY1)).isTrue();

        assertThat(describeChannelRequestArgumentCaptor.getValue().channelName()).isEqualTo(TEST_CHANNEL_NAME);

        assertThat(listTagsForResourceRequestArgumentCaptor.getValue().resourceArn()).isEqualTo(TEST_CHANNEL_ARN);

        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();

        assertThat(response.getResourceModel().getChannelName()).isEqualTo(TEST_CHANNEL_NAME);
        assertThat(response.getResourceModel().getId()).isEqualTo(TEST_CHANNEL_ID);
        assertThat(response.getResourceModel().getChannelStorage().getCustomerManagedS3()).isNull();
        assertThat(response.getResourceModel().getChannelStorage().getServiceManagedS3()).isNotNull();
        assertThat(response.getResourceModel().getRetentionPeriod().getNumberOfDays()).isEqualTo(TEST_DAYS);

        assertThat(response.getResourceModel().getTags().size()).isEqualTo(3);
        assertThat(response.getResourceModel().getTags().get(0).getKey()).isEqualTo(TEST_KEY1);
        assertThat(response.getResourceModel().getTags().get(0).getValue()).isEqualTo(TEST_VALUE1);
        assertThat(response.getResourceModel().getTags().get(1).getKey()).isEqualTo(TEST_KEY2);
        assertThat(response.getResourceModel().getTags().get(1).getValue()).isEqualTo(TEST_VALUE22);
        assertThat(response.getResourceModel().getTags().get(2).getKey()).isEqualTo(TEST_KEY3);
        assertThat(response.getResourceModel().getTags().get(2).getValue()).isEqualTo(TEST_VALUE3);
    }

    @Test
    public void GIVEN_update_diff_channel_name_WHEN_call_handleRequest_THEN_return_failed_invalid_request() {
        // GIVEN
        final ResourceModel preModel = ResourceModel.builder().channelName("name1").build();
        final ResourceModel newModel = ResourceModel.builder().channelName("name2").build();

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
            .desiredResourceState(newModel)
            .previousResourceState(preModel)
            .build();

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

        // THEN
        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()).isNotNull();
        assertThat(response.getErrorCode()).isEqualTo(HandlerErrorCode.InvalidRequest);

        verify(proxyClient.client(), never()).updateChannel(any(UpdateChannelRequest.class));
        verify(proxyClient.client(), never()).untagResource(any(UntagResourceRequest.class));
        verify(proxyClient.client(), never()).tagResource(any(TagResourceRequest.class));
        verify(proxyClient.client(), never()).describeChannel(any(DescribeChannelRequest.class));
        verify(proxyClient.client(), never()).listTagsForResource(any(ListTagsForResourceRequest.class));
    }

    @Test
    public void GIVEN_update_channel_arn_WHEN_call_handleRequest_THEN_return_failed_invalid_request() {
        // GIVEN
        final ResourceModel preModel = ResourceModel.builder().channelName("name1").id("id1").build();
        final ResourceModel newModel = ResourceModel.builder().channelName("name1").id("id2").build();

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
            .desiredResourceState(newModel)
            .previousResourceState(preModel)
            .build();

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

        // THEN
        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()).isNotNull();
        assertThat(response.getErrorCode()).isEqualTo(HandlerErrorCode.InvalidRequest);

        verify(proxyClient.client(), never()).updateChannel(any(UpdateChannelRequest.class));
        verify(proxyClient.client(), never()).untagResource(any(UntagResourceRequest.class));
        verify(proxyClient.client(), never()).tagResource(any(TagResourceRequest.class));
        verify(proxyClient.client(), never()).describeChannel(any(DescribeChannelRequest.class));
        verify(proxyClient.client(), never()).listTagsForResource(any(ListTagsForResourceRequest.class));
    }

    @Test
    public void GIVEN_update_same_channel_arn_WHEN_call_handleRequest_THEN_return_success() {
        // GIVEN
        final ResourceModel preModel = ResourceModel.builder().channelName(TEST_CHANNEL_NAME).id(TEST_CHANNEL_ID).build();
        final ResourceModel newModel = ResourceModel.builder().channelName(TEST_CHANNEL_NAME).id(TEST_CHANNEL_ID).build();

        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
            .desiredResourceState(newModel)
            .previousResourceState(preModel)
            .build();

        when(proxyClient.client().describeChannel(any(DescribeChannelRequest.class))).thenReturn(describeChannelResponseSimple);
        when(proxyClient.client().listTagsForResource(any(ListTagsForResourceRequest.class))).thenReturn(listTagsForResourceResponseSimple);

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

        // THEN
        verify(proxyClient.client(), times(1)).updateChannel(any(UpdateChannelRequest.class));
        verify(proxyClient.client(), never()).untagResource(any(UntagResourceRequest.class));
        verify(proxyClient.client(), never()).tagResource(any(TagResourceRequest.class));
        verify(proxyClient.client(), times(2)).describeChannel(any(DescribeChannelRequest.class));
        verify(proxyClient.client(), times(1)).listTagsForResource(any(ListTagsForResourceRequest.class));

        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();
        assertThat(response.getResourceModel().getTags()).isNull();
        assertThat(response.getResourceModel().getChannelName()).isEqualTo(TEST_CHANNEL_NAME);
    }

    @Test
    public void GIVEN_iota_update_exception_WHEN_call_handleRequest_THEN_throw_Exception() {
        // GIVEN
        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
            .desiredResourceState(newModel)
            .previousResourceState(preModel)
            .build();

        when(proxyClient.client().updateChannel(updateChannelRequestArgumentCaptor.capture())).thenThrow(InvalidRequestException.builder().build());

        // WHEN / THEN
        assertThrows(CfnInvalidRequestException.class,
            () -> handler.handleRequest(proxy, request, new CallbackContext(), proxyClient, logger));

        assertThat(updateChannelRequestArgumentCaptor.getValue().channelName()).isEqualTo(TEST_CHANNEL_NAME);
        verify(proxyClient.client(), times(1)).updateChannel(any(UpdateChannelRequest.class));
        verify(proxyClient.client(), never()).untagResource(any(UntagResourceRequest.class));
        verify(proxyClient.client(), never()).tagResource(any(TagResourceRequest.class));
        verify(proxyClient.client(), never()).describeChannel(any(DescribeChannelRequest.class));
        verify(proxyClient.client(), never()).listTagsForResource(any(ListTagsForResourceRequest.class));
    }

    @Test
    public void GIVEN_iota_untag_exception_WHEN_call_handleRequest_THEN_throw_Exception() {
        // GIVEN
        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
            .desiredResourceState(newModel)
            .previousResourceState(preModel)
            .build();

        when(proxyClient.client().updateChannel(any(UpdateChannelRequest.class))).thenReturn(UpdateChannelResponse.builder().build());
        when(proxyClient.client().untagResource(any(UntagResourceRequest.class))).thenThrow(LimitExceededException.builder().build());
        when(proxyClient.client().describeChannel(any(DescribeChannelRequest.class))).thenReturn(describeChannelResponseSimple);
        // WHEN / THEN
        assertThrows(CfnServiceLimitExceededException.class,
            () -> handler.handleRequest(proxy, request, new CallbackContext(), proxyClient, logger));

        verify(proxyClient.client(), times(1)).updateChannel(any(UpdateChannelRequest.class));
        verify(proxyClient.client(), times(1)).untagResource(any(UntagResourceRequest.class));
        verify(proxyClient.client(), times(1)).describeChannel(any(DescribeChannelRequest.class));
        verify(proxyClient.client(), never()).tagResource(any(TagResourceRequest.class));
        verify(proxyClient.client(), never()).listTagsForResource(any(ListTagsForResourceRequest.class));
    }

    @Test
    public void GIVEN_iota_tag_exception_WHEN_call_handleRequest_THEN_throw_Exception() {
        // GIVEN
        final ResourceHandlerRequest<ResourceModel> request = ResourceHandlerRequest.<ResourceModel>builder()
            .desiredResourceState(newModel)
            .previousResourceState(preModel)
            .build();

        when(proxyClient.client().updateChannel(any(UpdateChannelRequest.class))).thenReturn(UpdateChannelResponse.builder().build());
        when(proxyClient.client().untagResource(any(UntagResourceRequest.class))).thenReturn(UntagResourceResponse.builder().build());
        when(proxyClient.client().tagResource(any(TagResourceRequest.class))).thenThrow(ServiceUnavailableException.builder().build());
        when(proxyClient.client().describeChannel(any(DescribeChannelRequest.class))).thenReturn(describeChannelResponseSimple);

        // WHEN / THEN
        assertThrows(CfnGeneralServiceException.class,
            () -> handler.handleRequest(proxy, request, new CallbackContext(), proxyClient, logger));

        verify(proxyClient.client(), times(1)).updateChannel(any(UpdateChannelRequest.class));
        verify(proxyClient.client(), times(1)).untagResource(any(UntagResourceRequest.class));
        verify(proxyClient.client(), times(1)).tagResource(any(TagResourceRequest.class));
        verify(proxyClient.client(), times(1)).describeChannel(any(DescribeChannelRequest.class));
        verify(proxyClient.client(), never()).listTagsForResource(any(ListTagsForResourceRequest.class));
    }
}