package aws

import (
	"fmt"
	"testing"

	"github.com/aws/aws-sdk-go/aws"
	elasticsearch "github.com/aws/aws-sdk-go/service/elasticsearchservice"
	"github.com/hashicorp/terraform/helper/resource"
	"github.com/hashicorp/terraform/terraform"
)

func TestAccAWSElasticSearchDomain_basic(t *testing.T) {
	var domain elasticsearch.ElasticsearchDomainStatus

	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccCheckESDomainDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAccESDomainConfig_basic,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckESDomainExists("aws_elasticsearch_domain.example", &domain),
				),
			},
		},
	})
}

func TestAccAWSElasticSearchDomain_complex(t *testing.T) {
	var domain elasticsearch.ElasticsearchDomainStatus

	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccCheckESDomainDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAccESDomainConfig_complex,
				Check: resource.ComposeTestCheckFunc(
					testAccCheckESDomainExists("aws_elasticsearch_domain.example", &domain),
				),
			},
		},
	})
}

func testAccCheckESDomainExists(n string, domain *elasticsearch.ElasticsearchDomainStatus) 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 ES Domain ID is set")
		}

		conn := testAccProvider.Meta().(*AWSClient).esconn
		opts := &elasticsearch.DescribeElasticsearchDomainInput{
			DomainName: aws.String(rs.Primary.Attributes["domain_name"]),
		}

		resp, err := conn.DescribeElasticsearchDomain(opts)
		if err != nil {
			return fmt.Errorf("Error describing domain: %s", err.Error())
		}

		*domain = *resp.DomainStatus

		return nil
	}
}

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

		conn := testAccProvider.Meta().(*AWSClient).esconn
		opts := &elasticsearch.DescribeElasticsearchDomainInput{
			DomainName: aws.String(rs.Primary.Attributes["domain_name"]),
		}

		_, err := conn.DescribeElasticsearchDomain(opts)
		if err != nil {
			return fmt.Errorf("Error describing ES domains: %q", err.Error())
		}
	}
	return nil
}

const testAccESDomainConfig_basic = `
resource "aws_elasticsearch_domain" "example" {
	domain_name = "tf-test-1"
}
`

const testAccESDomainConfig_complex = `
resource "aws_elasticsearch_domain" "example" {
	domain_name = "tf-test-2"

	advanced_options {
		"indices.fielddata.cache.size" = 80
	}

	ebs_options {
		ebs_enabled = false
	}

	cluster_config {
		instance_count = 2
		zone_awareness_enabled = true
	}

	snapshot_options {
		automated_snapshot_start_hour = 23
	}
}
`