package aws

import (
	"fmt"
	"testing"

	"github.com/aws/aws-sdk-go/aws"
	dms "github.com/aws/aws-sdk-go/service/databasemigrationservice"
	"github.com/hashicorp/terraform/helper/acctest"
	"github.com/hashicorp/terraform/helper/resource"
	"github.com/hashicorp/terraform/helper/schema"
	"github.com/hashicorp/terraform/terraform"
)

func TestAccAwsDmsCertificateBasic(t *testing.T) {
	resourceName := "aws_dms_certificate.dms_certificate"
	randId := acctest.RandString(8)

	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: dmsCertificateDestroy,
		Steps: []resource.TestStep{
			{
				Config: dmsCertificateConfig(randId),
				Check: resource.ComposeTestCheckFunc(
					checkDmsCertificateExists(resourceName),
					resource.TestCheckResourceAttrSet(resourceName, "certificate_arn"),
				),
			},
			{
				ResourceName:      resourceName,
				ImportState:       true,
				ImportStateVerify: true,
			},
		},
	})
}

func dmsCertificateDestroy(s *terraform.State) error {
	for _, rs := range s.RootModule().Resources {
		if rs.Type != "aws_dms_certificate" {
			continue
		}

		err := checkDmsCertificateExists(rs.Primary.ID)
		if err == nil {
			return fmt.Errorf("Found a certificate that was not destroyed: %s", rs.Primary.ID)
		}
	}

	return nil
}

func checkDmsCertificateExists(n string) resource.TestCheckFunc {
	providers := []*schema.Provider{testAccProvider}
	return checkDmsCertificateExistsWithProviders(n, &providers)
}

func checkDmsCertificateExistsWithProviders(n string, providers *[]*schema.Provider) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		rs, ok := s.RootModule().Resources[n]
		if !ok {
			return fmt.Errorf("Not found: %s", n)
		}

		if rs.Primary.ID == "" {
			return fmt.Errorf("No ID is set")
		}
		for _, provider := range *providers {
			// Ignore if Meta is empty, this can happen for validation providers
			if provider.Meta() == nil {
				continue
			}

			conn := provider.Meta().(*AWSClient).dmsconn
			_, err := conn.DescribeCertificates(&dms.DescribeCertificatesInput{
				Filters: []*dms.Filter{
					{
						Name:   aws.String("certificate-id"),
						Values: []*string{aws.String(rs.Primary.ID)},
					},
				},
			})

			if err != nil {
				return fmt.Errorf("DMS certificate error: %v", err)
			}
			return nil
		}

		return fmt.Errorf("DMS certificate not found")
	}
}

func dmsCertificateConfig(randId string) string {
	return fmt.Sprintf(`
resource "aws_dms_certificate" "dms_certificate" {
	certificate_id = "tf-test-dms-certificate-%[1]s"
    certificate_pem = "-----BEGIN CERTIFICATE-----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\nTeYnm7pS9un7A/UzTDHbs7hPUezLek+H3xTPAnnq\n-----END CERTIFICATE-----\n"
}
`, randId)
}