package storage

import (
	"context"
	"testing"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/request"
	"github.com/aws/aws-sdk-go/service/s3"
	"github.com/pingcap/tidb/br/pkg/mock"
	"github.com/stretchr/testify/require"
	gomock "go.uber.org/mock/gomock"
)

func TestS3_ListObjects(t *testing.T) {
	mockS3 := mock.NewMockS3API(gomock.NewController(t))
	client := NewMockS3Client(mockS3)

	ctx := context.Background()

	contents := []*s3.Object{
		{
			// s3://bucket/prefix/01.jpg
			Key: aws.String("prefix/01.jpg"),
		},
		{
			// s3://bucket/prefix/02.jpg
			Key: aws.String("prefix/02.jpg"),
		},
		{
			// s3://bucket/prefix/03.jpg
			Key: aws.String("prefix/03.jpg"),
		},
		{
			// s3://bucket/prefix/04.jpg
			Key: aws.String("prefix/04.jpg"),
		},
	}

	testCases := []struct {
		bucket   string
		prefix   string
		expected []string
	}{
		{
			bucket: "bucket",
			prefix: "prefix/",
			expected: []string{
				"s3://bucket/prefix/01.jpg",
				"s3://bucket/prefix/02.jpg",
				"s3://bucket/prefix/03.jpg",
				"s3://bucket/prefix/04.jpg",
			},
		},
	}

	for _, tc := range testCases {
		mockS3.EXPECT().ListObjectsWithContext(ctx, gomock.Any()).
			DoAndReturn(func(_ context.Context, input *s3.ListObjectsInput, opt ...request.Option) (*s3.ListObjectsOutput, error) {
				require.Equal(t, tc.bucket, aws.StringValue(input.Bucket))
				require.Equal(t, tc.prefix, aws.StringValue(input.Prefix))
				return &s3.ListObjectsOutput{
					IsTruncated: aws.Bool(true),
					Contents:    contents,
				}, nil
			})

		objUris, err := client.ListObjects(ctx, tc.bucket, tc.prefix)
		require.NoError(t, err)
		require.Equal(t, tc.expected, objUris)
	}
}