package shell

import (
	"github.com/mitchellh/packer/packer"
	"io/ioutil"
	"os"
	"regexp"
	"strings"
	"testing"
)

func testConfig() map[string]interface{} {
	return map[string]interface{}{
		"inline": []interface{}{"foo", "bar"},
	}
}

func TestProvisioner_Impl(t *testing.T) {
	var raw interface{}
	raw = &Provisioner{}
	if _, ok := raw.(packer.Provisioner); !ok {
		t.Fatalf("must be a Provisioner")
	}
}

func TestProvisionerPrepare_Defaults(t *testing.T) {
	var p Provisioner
	config := testConfig()

	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	if *p.config.ExpectDisconnect != true {
		t.Errorf("expected ExpectDisconnect to be true")
	}

	if p.config.RemotePath == "" {
		t.Errorf("unexpected remote path: %s", p.config.RemotePath)
	}
}

func TestProvisionerPrepare_ExpectDisconnect(t *testing.T) {
	config := testConfig()
	p := new(Provisioner)
	config["expect_disconnect"] = false

	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	if *p.config.ExpectDisconnect != false {
		t.Errorf("expected ExpectDisconnect to be false")
	}

	config["expect_disconnect"] = true
	p = new(Provisioner)
	err = p.Prepare(config)
	if err != nil {
		t.Fatalf("err: %s", err)
	}

	if *p.config.ExpectDisconnect != true {
		t.Errorf("expected ExpectDisconnect to be true")
	}

}

func TestProvisionerPrepare_InlineShebang(t *testing.T) {
	config := testConfig()

	delete(config, "inline_shebang")
	p := new(Provisioner)
	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if p.config.InlineShebang != "/bin/sh -e" {
		t.Fatalf("bad value: %s", p.config.InlineShebang)
	}

	// Test with a good one
	config["inline_shebang"] = "foo"
	p = new(Provisioner)
	err = p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if p.config.InlineShebang != "foo" {
		t.Fatalf("bad value: %s", p.config.InlineShebang)
	}
}

func TestProvisionerPrepare_InvalidKey(t *testing.T) {
	var p Provisioner
	config := testConfig()

	// Add a random key
	config["i_should_not_be_valid"] = true
	err := p.Prepare(config)
	if err == nil {
		t.Fatal("should have error")
	}
}

func TestProvisionerPrepare_Script(t *testing.T) {
	config := testConfig()
	delete(config, "inline")

	config["script"] = "/this/should/not/exist"
	p := new(Provisioner)
	err := p.Prepare(config)
	if err == nil {
		t.Fatal("should have error")
	}

	// Test with a good one
	tf, err := ioutil.TempFile("", "packer")
	if err != nil {
		t.Fatalf("error tempfile: %s", err)
	}
	defer os.Remove(tf.Name())

	config["script"] = tf.Name()
	p = new(Provisioner)
	err = p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}
}

func TestProvisionerPrepare_ScriptAndInline(t *testing.T) {
	var p Provisioner
	config := testConfig()

	delete(config, "inline")
	delete(config, "script")
	err := p.Prepare(config)
	if err == nil {
		t.Fatal("should have error")
	}

	// Test with both
	tf, err := ioutil.TempFile("", "packer")
	if err != nil {
		t.Fatalf("error tempfile: %s", err)
	}
	defer os.Remove(tf.Name())

	config["inline"] = []interface{}{"foo"}
	config["script"] = tf.Name()
	err = p.Prepare(config)
	if err == nil {
		t.Fatal("should have error")
	}
}

func TestProvisionerPrepare_ScriptAndScripts(t *testing.T) {
	var p Provisioner
	config := testConfig()

	// Test with both
	tf, err := ioutil.TempFile("", "packer")
	if err != nil {
		t.Fatalf("error tempfile: %s", err)
	}
	defer os.Remove(tf.Name())

	config["inline"] = []interface{}{"foo"}
	config["scripts"] = []string{tf.Name()}
	err = p.Prepare(config)
	if err == nil {
		t.Fatal("should have error")
	}
}

func TestProvisionerPrepare_Scripts(t *testing.T) {
	config := testConfig()
	delete(config, "inline")

	config["scripts"] = []string{}
	p := new(Provisioner)
	err := p.Prepare(config)
	if err == nil {
		t.Fatal("should have error")
	}

	// Test with a good one
	tf, err := ioutil.TempFile("", "packer")
	if err != nil {
		t.Fatalf("error tempfile: %s", err)
	}
	defer os.Remove(tf.Name())

	config["scripts"] = []string{tf.Name()}
	p = new(Provisioner)
	err = p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}
}

func TestProvisionerPrepare_EnvironmentVars(t *testing.T) {
	config := testConfig()

	// Test with a bad case
	config["environment_vars"] = []string{"badvar", "good=var"}
	p := new(Provisioner)
	err := p.Prepare(config)
	if err == nil {
		t.Fatal("should have error")
	}

	// Test with a trickier case
	config["environment_vars"] = []string{"=bad"}
	p = new(Provisioner)
	err = p.Prepare(config)
	if err == nil {
		t.Fatal("should have error")
	}

	// Test with a good case
	// Note: baz= is a real env variable, just empty
	config["environment_vars"] = []string{"FOO=bar", "baz="}
	p = new(Provisioner)
	err = p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}
}

func TestProvisionerQuote_EnvironmentVars(t *testing.T) {
	config := testConfig()

	config["environment_vars"] = []string{"keyone=valueone", "keytwo=value\ntwo"}
	p := new(Provisioner)
	p.Prepare(config)

	expectedValue := "keyone='valueone'"
	if p.config.Vars[0] != expectedValue {
		t.Fatalf("%s should be equal to %s", p.config.Vars[0], expectedValue)
	}

	expectedValue = "keytwo='value\ntwo'"
	if p.config.Vars[1] != expectedValue {
		t.Fatalf("%s should be equal to %s", p.config.Vars[1], expectedValue)
	}
}

func TestProvisioner_RemoteFolderSetSuccessfully(t *testing.T) {
	config := testConfig()

	expectedRemoteFolder := "/example/path"
	config["remote_folder"] = expectedRemoteFolder

	p := new(Provisioner)
	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if !strings.Contains(p.config.RemotePath, expectedRemoteFolder) {
		t.Fatalf("remote path does not contain remote_folder")
	}
}

func TestProvisioner_RemoteFolderDefaultsToTmp(t *testing.T) {
	config := testConfig()

	p := new(Provisioner)
	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if p.config.RemoteFolder != "/tmp" {
		t.Fatalf("remote_folder did not default to /tmp")
	}

	if !strings.Contains(p.config.RemotePath, "/tmp") {
		t.Fatalf("remote path does not contain remote_folder")
	}
}

func TestProvisioner_RemoteFileSetSuccessfully(t *testing.T) {
	config := testConfig()

	expectedRemoteFile := "example.sh"
	config["remote_file"] = expectedRemoteFile

	p := new(Provisioner)
	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if !strings.Contains(p.config.RemotePath, expectedRemoteFile) {
		t.Fatalf("remote path does not contain remote_file")
	}
}

func TestProvisioner_RemoteFileDefaultsToScriptnnnn(t *testing.T) {
	config := testConfig()

	p := new(Provisioner)
	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	remoteFileRegex := regexp.MustCompile("script_[0-9]{4}.sh")

	if !remoteFileRegex.MatchString(p.config.RemoteFile) {
		t.Fatalf("remote_file did not default to script_nnnn.sh")
	}

	if !remoteFileRegex.MatchString(p.config.RemotePath) {
		t.Fatalf("remote_path did not match script_nnnn.sh")
	}
}

func TestProvisioner_RemotePathSetViaRemotePathAndRemoteFile(t *testing.T) {
	config := testConfig()

	expectedRemoteFile := "example.sh"
	expectedRemoteFolder := "/example/path"
	config["remote_file"] = expectedRemoteFile
	config["remote_folder"] = expectedRemoteFolder

	p := new(Provisioner)
	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if p.config.RemotePath != expectedRemoteFolder+"/"+expectedRemoteFile {
		t.Fatalf("remote path does not contain remote_file")
	}
}

func TestProvisioner_RemotePathOverridesRemotePathAndRemoteFile(t *testing.T) {
	config := testConfig()

	expectedRemoteFile := "example.sh"
	expectedRemoteFolder := "/example/path"
	expectedRemotePath := "/example/remote/path/script.sh"
	config["remote_file"] = expectedRemoteFile
	config["remote_folder"] = expectedRemoteFolder
	config["remote_path"] = expectedRemotePath

	p := new(Provisioner)
	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	if p.config.RemotePath != expectedRemotePath {
		t.Fatalf("remote path does not contain remote_path")
	}
}

func TestProvisionerRemotePathDefaultsSuccessfully(t *testing.T) {
	config := testConfig()

	p := new(Provisioner)
	err := p.Prepare(config)
	if err != nil {
		t.Fatalf("should not have error: %s", err)
	}

	remotePathRegex := regexp.MustCompile("/tmp/script_[0-9]{4}.sh")

	if !remotePathRegex.MatchString(p.config.RemotePath) {
		t.Fatalf("remote path does not match the expected default regex")
	}
}