package google

import (
	"fmt"
	"testing"

	"github.com/hashicorp/terraform/helper/resource"
	"github.com/hashicorp/terraform/terraform"
)

func TestAccDataSourceComputeAddress(t *testing.T) {
	t.Parallel()

	rsName := "foobar"
	rsFullName := fmt.Sprintf("google_compute_address.%s", rsName)
	dsName := "my_address"
	dsFullName := fmt.Sprintf("data.google_compute_address.%s", dsName)

	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccCheckDataSourceComputeAddressDestroy(rsFullName),
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAccDataSourceComputeAddressConfig(rsName, dsName),
				Check: resource.ComposeTestCheckFunc(
					testAccDataSourceComputeAddressCheck(dsFullName, rsFullName),
				),
			},
		},
	})
}

func testAccDataSourceComputeAddressCheck(data_source_name string, resource_name string) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		ds, ok := s.RootModule().Resources[data_source_name]
		if !ok {
			return fmt.Errorf("root module has no resource called %s", data_source_name)
		}

		rs, ok := s.RootModule().Resources[resource_name]
		if !ok {
			return fmt.Errorf("can't find %s in state", resource_name)
		}

		ds_attr := ds.Primary.Attributes
		rs_attr := rs.Primary.Attributes

		address_attrs_to_test := []string{
			"self_link",
			"name",
			"address",
		}

		for _, attr_to_check := range address_attrs_to_test {
			if ds_attr[attr_to_check] != rs_attr[attr_to_check] {
				return fmt.Errorf(
					"%s is %s; want %s",
					attr_to_check,
					ds_attr[attr_to_check],
					rs_attr[attr_to_check],
				)
			}
		}

		if ds_attr["status"] != "RESERVED" {
			return fmt.Errorf("status is %s; want RESERVED", ds_attr["status"])
		}

		return nil
	}
}

func testAccCheckDataSourceComputeAddressDestroy(resource_name string) resource.TestCheckFunc {
	return func(s *terraform.State) error {
		config := testAccProvider.Meta().(*Config)

		rs, ok := s.RootModule().Resources[resource_name]
		if !ok {
			return fmt.Errorf("can't find %s in state", resource_name)
		}

		addressId, err := parseComputeAddressId(rs.Primary.ID, nil)

		_, err = config.clientCompute.Addresses.Get(
			config.Project, addressId.Region, addressId.Name).Do()
		if err == nil {
			return fmt.Errorf("Address still exists")
		}

		return nil
	}
}

func testAccDataSourceComputeAddressConfig(rsName, dsName string) string {
	return fmt.Sprintf(`
resource "google_compute_address" "%s" {
	name = "address-test"
}

data "google_compute_address" "%s" {
	name = "${google_compute_address.%s.name}"
}
`, rsName, dsName, rsName)
}