package main
 
 import (

 	"bufio"

 	"compress/gzip"

 	"io/ioutil"
 	"os"

 	"os/exec"

 	"regexp"

 	"strings"

 	"github.com/docker/docker/pkg/integration/checker"

 	"github.com/go-check/check"

 )
 

 func (s *DockerSuite) TestImportDisplay(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	out, _ := dockerCmd(c, "run", "-d", "busybox", "true")

 	cleanedContainerID := strings.TrimSpace(out)

 	out, _, err := runCommandPipelineWithOutput(

 		exec.Command(dockerBinary, "export", cleanedContainerID),
 		exec.Command(dockerBinary, "import", "-"),
 	)

 	c.Assert(err, checker.IsNil)

 	c.Assert(out, checker.Count, "\n", 1, check.Commentf("display is expected 1 '\\n' but didn't"))

 	image := strings.TrimSpace(out)

 	out, _ = dockerCmd(c, "run", "--rm", image, "true")

 	c.Assert(out, checker.Equals, "", check.Commentf("command output should've been nothing."))

 }

 
 func (s *DockerSuite) TestImportBadURL(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	out, _, err := dockerCmdWithError("import", "http://nourl/bad")

 	c.Assert(err, checker.NotNil, check.Commentf("import was supposed to fail but didn't"))

 	// Depending on your system you can get either of these errors
 	if !strings.Contains(out, "dial tcp") &&
 		!strings.Contains(out, "Error processing tar file") {
 		c.Fatalf("expected an error msg but didn't get one.\nErr: %v\nOut: %v", err, out)
 	}

 }

 
 func (s *DockerSuite) TestImportFile(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	dockerCmd(c, "run", "--name", "test-import", "busybox", "true")

 
 	temporaryFile, err := ioutil.TempFile("", "exportImportTest")

 	c.Assert(err, checker.IsNil, check.Commentf("failed to create temporary file"))

 	defer os.Remove(temporaryFile.Name())
 

 	runCmd := exec.Command(dockerBinary, "export", "test-import")

 	runCmd.Stdout = bufio.NewWriter(temporaryFile)
 
 	_, err = runCommand(runCmd)

 	c.Assert(err, checker.IsNil, check.Commentf("failed to export a container"))

 	out, _ := dockerCmd(c, "import", temporaryFile.Name())

 	c.Assert(out, checker.Count, "\n", 1, check.Commentf("display is expected 1 '\\n' but didn't"))

 	image := strings.TrimSpace(out)
 

 	out, _ = dockerCmd(c, "run", "--rm", image, "true")

 	c.Assert(out, checker.Equals, "", check.Commentf("command output should've been nothing."))

 }
 

 func (s *DockerSuite) TestImportGzipped(c *check.C) {
 	testRequires(c, DaemonIsLinux)
 	dockerCmd(c, "run", "--name", "test-import", "busybox", "true")
 
 	temporaryFile, err := ioutil.TempFile("", "exportImportTest")
 	c.Assert(err, checker.IsNil, check.Commentf("failed to create temporary file"))
 	defer os.Remove(temporaryFile.Name())
 
 	runCmd := exec.Command(dockerBinary, "export", "test-import")
 	w := gzip.NewWriter(temporaryFile)
 	runCmd.Stdout = w
 
 	_, err = runCommand(runCmd)
 	c.Assert(err, checker.IsNil, check.Commentf("failed to export a container"))
 	err = w.Close()
 	c.Assert(err, checker.IsNil, check.Commentf("failed to close gzip writer"))
 	temporaryFile.Close()
 	out, _ := dockerCmd(c, "import", temporaryFile.Name())
 	c.Assert(out, checker.Count, "\n", 1, check.Commentf("display is expected 1 '\\n' but didn't"))
 	image := strings.TrimSpace(out)
 
 	out, _ = dockerCmd(c, "run", "--rm", image, "true")
 	c.Assert(out, checker.Equals, "", check.Commentf("command output should've been nothing."))
 }
 

 func (s *DockerSuite) TestImportFileWithMessage(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	dockerCmd(c, "run", "--name", "test-import", "busybox", "true")
 
 	temporaryFile, err := ioutil.TempFile("", "exportImportTest")

 	c.Assert(err, checker.IsNil, check.Commentf("failed to create temporary file"))

 	defer os.Remove(temporaryFile.Name())
 
 	runCmd := exec.Command(dockerBinary, "export", "test-import")
 	runCmd.Stdout = bufio.NewWriter(temporaryFile)
 
 	_, err = runCommand(runCmd)

 	c.Assert(err, checker.IsNil, check.Commentf("failed to export a container"))

 
 	message := "Testing commit message"
 	out, _ := dockerCmd(c, "import", "-m", message, temporaryFile.Name())

 	c.Assert(out, checker.Count, "\n", 1, check.Commentf("display is expected 1 '\\n' but didn't"))

 	image := strings.TrimSpace(out)
 
 	out, _ = dockerCmd(c, "history", image)
 	split := strings.Split(out, "\n")
 

 	c.Assert(split, checker.HasLen, 3, check.Commentf("expected 3 lines from image history"))

 	r := regexp.MustCompile("[\\s]{2,}")
 	split = r.Split(split[1], -1)
 

 	c.Assert(message, checker.Equals, split[3], check.Commentf("didn't get expected value in commit message"))

 
 	out, _ = dockerCmd(c, "run", "--rm", image, "true")

 	c.Assert(out, checker.Equals, "", check.Commentf("command output should've been nothing"))

 }
 

 func (s *DockerSuite) TestImportFileNonExistentFile(c *check.C) {

 	_, _, err := dockerCmdWithError("import", "example.com/myImage.tar")
 	c.Assert(err, checker.NotNil, check.Commentf("import non-existing file must failed"))

 }