package app

import (
	"fmt"
	"os"
	"reflect"
	"testing"

	"gitlab.com/revalus/grm/commands"
	"gitlab.com/revalus/grm/config"
	"gitlab.com/revalus/grm/echo"
)

type FakeCommandToTest struct {
	triggerError   bool
	triggerChanged bool
}

type ExpectedMessageTester struct {
	expectedMessages []string
}

func (emt ExpectedMessageTester) Write(p []byte) (n int, err error) {
	msg := string(p)
	if !checkIsItemInSlice(msg, emt.expectedMessages) {
		panic(fmt.Sprintf("the message \"%v\"does not match any of the given patterns: %#v", msg, emt.expectedMessages))
	} else {
		fmt.Println(msg)
	}

	return 0, nil
}

func (fk FakeCommandToTest) Command(repoCfg config.RepositoryConfig, cmdStatus chan commands.CommandStatus) {
	status := commands.CommandStatus{
		Name:    repoCfg.Name,
		Changed: false,
		Message: "response from fake command",
		Error:   false,
	}

	if fk.triggerError {
		status.Error = true
	}
	if fk.triggerChanged {
		status.Changed = true
	}

	cmdStatus <- status
}

func prepareConfigContent() (string, string) {
	checkErrorDuringPreparation := func(err error) {
		if err != nil {
			fmt.Printf("Cannot prepare a temporary directory for testing! %v ", err.Error())
			os.Exit(2)
		}
	}

	baseTmp := fmt.Sprintf("%v/grmTest", os.TempDir())
	if _, ok := os.Stat(baseTmp); ok != nil {
		err := os.Mkdir(baseTmp, 0777)
		checkErrorDuringPreparation(err)
	}

	tempDir, err := os.MkdirTemp(baseTmp, "*")
	checkErrorDuringPreparation(err)

	configFilePath := fmt.Sprintf("%v/config-file.yaml", tempDir)

	file, err := os.Create(configFilePath)
	checkErrorDuringPreparation(err)

	defer file.Close()

	yamlConfig := fmt.Sprintf(`
workspace: %v
repositories:
  - src: "https://github.com/golang/example.git"
    tags: ['example']
`, tempDir)

	_, err = file.WriteString(yamlConfig)

	checkErrorDuringPreparation(err)
	return tempDir, configFilePath
}

func TestParseApplication(t *testing.T) {
	workdir, configFile := prepareConfigContent()
	t.Cleanup(func() {
		os.Remove(workdir)
	})

	args := []string{"custom-app", "sync", "-c", configFile}
	grm := GitRepositoryManager{}
	grm.Parse(args)

	if workdir != grm.configuration.Workspace {
		t.Errorf("Expected to get %v, instead of this got %v", workdir, grm.configuration.Repositories)
	}

	if !grm.cliArguments.Sync {
		t.Error("The value of \"sync\" is expected to be true")
	}

	expectedRepo := config.RepositoryConfig{
		Name: "example",
		Src:  "https://github.com/golang/example.git",
		Dest: "example",
		Tags: []string{"example"},
	}

	if !reflect.DeepEqual(expectedRepo, grm.configuration.Repositories[0]) {
		t.Errorf("Expected to get %v, instead of this got %v", expectedRepo, grm.configuration.Repositories[0])
	}
}

func TestOutputFromSync(t *testing.T) {
	grm := GitRepositoryManager{
		configuration: config.Configuration{
			Workspace: "/tmp",
		},
		cliArguments: config.CliArguments{
			Sync:    true,
			Version: true,
			Color:   false,
		},
	}
	emt := ExpectedMessageTester{
		expectedMessages: []string{
			"Info: Synchronizing repositories\n",
			"Info: All repositories are synced\n",
			fmt.Sprintf("Info: Current version: %v\n", VERSION),
		},
	}
	grm.Run(emt)
}

func TestLimitTags(t *testing.T) {
	grm := GitRepositoryManager{
		cliArguments: config.CliArguments{
			LimitTags: []string{"example"},
		},
		configuration: config.Configuration{
			Repositories: []config.RepositoryConfig{
				{Name: "example1", Tags: []string{"example"}},
				{Name: "example2", Tags: []string{"example"}},
				{Name: "notExample"},
			},
		},
	}
	fakeCommand := FakeCommandToTest{
		triggerError:   false,
		triggerChanged: false,
	}
	emt := ExpectedMessageTester{
		expectedMessages: []string{
			"Repository \"example1\": response from fake command\n",
			"Repository \"example2\": response from fake command\n",
		},
	}
	echo.Color(false)
	echo.Output(emt)
	grm.limitTags()
	grm.runCommand(fakeCommand)
}

func TestLimitName(t *testing.T) {
	grm := GitRepositoryManager{
		cliArguments: config.CliArguments{
			LimitName: "notExample",
		},
		configuration: config.Configuration{
			Repositories: []config.RepositoryConfig{
				{Name: "example1", Tags: []string{"example"}},
				{Name: "example2", Tags: []string{"example"}},
				{Name: "notExample"},
			},
		},
	}
	fakeCommand := FakeCommandToTest{
		triggerError:   false,
		triggerChanged: false,
	}
	emt := ExpectedMessageTester{
		expectedMessages: []string{
			"Repository \"notExample\": response from fake command\n",
		},
	}
	echo.Color(false)
	echo.Output(emt)
	grm.limitName()
	grm.runCommand(fakeCommand)
}
func TestRunWithNotExistingNameInLimit(t *testing.T) {
	grm := GitRepositoryManager{
		cliArguments: config.CliArguments{
			LimitName: "not-existing-name",
		},
		configuration: config.Configuration{
			Repositories: []config.RepositoryConfig{
				{Name: "example1", Tags: []string{"example"}},
				{Name: "example2", Tags: []string{"example"}},
				{Name: "notExample"},
			},
		},
	}
	emt := ExpectedMessageTester{
		expectedMessages: []string{
			"Error: no repository was found with the specified name\n",
		},
	}
	echo.Color(false)
	status := grm.Run(emt)
	if status != 1 {
		t.Errorf("Expected to get status %v, instead o this got %v", 1, status)
	}
}

func TestRunWithNotExistingTagsInLimit(t *testing.T) {
	grm := GitRepositoryManager{
		cliArguments: config.CliArguments{
			LimitTags: []string{"not-existing-tag"},
		},
		configuration: config.Configuration{
			Repositories: []config.RepositoryConfig{
				{Name: "example1", Tags: []string{"example"}},
				{Name: "example2", Tags: []string{"example"}},
				{Name: "notExample"},
			},
		},
	}
	emt := ExpectedMessageTester{
		expectedMessages: []string{
			"Error: no repository was found with the specified tags\n",
		},
	}
	echo.Color(false)
	status := grm.Run(emt)
	if status != 1 {
		t.Errorf("Expected to get status %v, instead o this got %v", 1, status)
	}
}

func TestGetStatusOutput(t *testing.T) {
	grm := GitRepositoryManager{
		configuration: config.Configuration{
			Workspace: "/tmp",
		},
		cliArguments: config.CliArguments{
			Status: true,
		},
	}
	emt := ExpectedMessageTester{
		expectedMessages: []string{
			"Info: Current status of repositories\n",
		},
	}
	echo.Color(false)
	status := grm.Run(emt)
	if status != 0 {
		t.Errorf("Expected to get status %v, instead o this got %v", 1, status)
	}
	// Output:
	// Info: Current status of repositories
}