package docker

import (
	"fmt"
	"regexp"
	"testing"

	dc "github.com/fsouza/go-dockerclient"
	"github.com/hashicorp/terraform/helper/resource"
	"github.com/hashicorp/terraform/terraform"
)

var contentDigestRegexp = regexp.MustCompile(`\A[A-Za-z0-9_\+\.-]+:[A-Fa-f0-9]+\z`)

func TestAccDockerImage_basic(t *testing.T) {
	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccDockerImageDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAccDockerImageConfig,
				Check: resource.ComposeTestCheckFunc(
					resource.TestMatchResourceAttr("docker_image.foo", "latest", contentDigestRegexp),
				),
			},
		},
	})
}

func TestAccDockerImage_private(t *testing.T) {
	resource.Test(t, resource.TestCase{
		PreCheck:     func() { testAccPreCheck(t) },
		Providers:    testAccProviders,
		CheckDestroy: testAccDockerImageDestroy,
		Steps: []resource.TestStep{
			resource.TestStep{
				Config: testAddDockerPrivateImageConfig,
				Check: resource.ComposeTestCheckFunc(
					resource.TestMatchResourceAttr("docker_image.foobar", "latest", contentDigestRegexp),
				),
			},
		},
	})
}

func testAccDockerImageDestroy(s *terraform.State) error {
	//client := testAccProvider.Meta().(*dc.Client)

	for _, rs := range s.RootModule().Resources {
		if rs.Type != "docker_image" {
			continue
		}

		client := testAccProvider.Meta().(*dc.Client)
		_, err := client.InspectImage(rs.Primary.Attributes["latest"])
		if err == nil {
			return fmt.Errorf("Image still exists")
		} else if err != dc.ErrNoSuchImage {
			return err
		}
	}
	return nil
}

const testAccDockerImageConfig = `
resource "docker_image" "foo" {
	name = "alpine:3.1"
	keep_updated = false
}
`

const testAddDockerPrivateImageConfig = `
resource "docker_image" "foobar" {
	name = "gcr.io:443/google_containers/pause:0.8.0"
	keep_updated = true
}
`