// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package commands

import (
	"os"
	"os/user"
	"path/filepath"
	"strings"
	"testing"

	"github.com/spf13/viper"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestResolveConfigFilePath(t *testing.T) {
	originalUser := *currentUser
	defer func() {
		SetUser(&originalUser)
	}()

	testUser, err := user.Current()
	require.NoError(t, err)

	t.Run("should return the default config file location if nothing else is set", func(t *testing.T) {
		tmp, err := os.MkdirTemp("", "mmctl-")
		require.NoError(t, err)
		t.Cleanup(func() {
			err = os.RemoveAll(tmp)
			require.NoError(t, err)
		})
		testUser.HomeDir = tmp
		SetUser(testUser)

		expected := filepath.Join(getDefaultConfigHomePath(), configParent, configFileName)

		viper.Set("config", filepath.Join(xdgConfigHomeVar, configParent, configFileName))

		p := resolveConfigFilePath()
		require.Equal(t, expected, p)
	})

	t.Run("should return config file location from xdg environment variable", func(t *testing.T) {
		tmp, err := os.MkdirTemp("", "mmctl-")
		require.NoError(t, err)
		t.Cleanup(func() {
			err = os.RemoveAll(tmp)
			require.NoError(t, err)
		})
		testUser.HomeDir = tmp
		SetUser(testUser)

		expected := filepath.Join(testUser.HomeDir, ".config", configParent, configFileName)

		t.Setenv("XDG_CONFIG_HOME", filepath.Join(testUser.HomeDir, ".config"))
		viper.Set("config", filepath.Join(xdgConfigHomeVar, configParent, configFileName))

		p := resolveConfigFilePath()
		require.Equal(t, expected, p)
	})

	t.Run("should return the user-defined config file path if one is set", func(t *testing.T) {
		tmp, err := os.MkdirTemp("", "mmctl-")
		require.NoError(t, err)
		t.Cleanup(func() {
			err = os.RemoveAll(tmp)
			require.NoError(t, err)
		})

		testUser.HomeDir = tmp + "/path/should/be/ignored"
		SetUser(testUser)

		expected := filepath.Join(tmp, configFileName)

		t.Setenv("XDG_CONFIG_HOME", "path/should/be/ignored")
		viper.Set("config", expected)

		p := resolveConfigFilePath()
		require.Equal(t, expected, p)
	})

	t.Run("should resolve config file path if $HOME variable is used", func(t *testing.T) {
		tmp, err := os.MkdirTemp("", "mmctl-")
		require.NoError(t, err)
		t.Cleanup(func() {
			err = os.RemoveAll(tmp)
			require.NoError(t, err)
		})

		testUser.HomeDir = tmp + "/path/should/be/ignored"
		SetUser(testUser)

		expected := filepath.Join(testUser.HomeDir, "/.config/mmctl/config")

		t.Setenv("XDG_CONFIG_HOME", "path/should/be/ignored")
		viper.Set("config", "$HOME/.config/mmctl/config")

		p := resolveConfigFilePath()
		require.Equal(t, expected, p)
	})

	t.Run("should create the user-defined config file path if one is set", func(t *testing.T) {
		tmp, err := os.MkdirTemp("", "mmctl-")
		require.NoError(t, err)
		t.Cleanup(func() {
			err = os.RemoveAll(tmp)
			require.NoError(t, err)
		})

		testUser.HomeDir = tmp + "path/should/be/ignored"
		SetUser(testUser)
		extraDir := "extra"

		expected := filepath.Join(tmp, extraDir, "config.json")

		t.Setenv("XDG_CONFIG_HOME", "path/should/be/ignored")
		viper.Set("config", expected)

		err = SaveCredentials(Credentials{})
		require.NoError(t, err)
		info, err := os.Stat(expected)
		require.NoError(t, err)

		assert.False(t, info.IsDir())
		assert.True(t, info.Name() == "config.json")
	})

	t.Run("should return error if the config flag is set to a directory", func(t *testing.T) {
		tmp, err := os.MkdirTemp("", "mmctl-")
		require.NoError(t, err)
		t.Cleanup(func() {
			err = os.RemoveAll(tmp)
			require.NoError(t, err)
		})
		testUser.HomeDir = tmp + "path/should/be/ignored"
		SetUser(testUser)

		t.Setenv("XDG_CONFIG_HOME", "path/should/be/ignored")
		viper.Set("config", tmp)

		err = SaveCredentials(Credentials{})
		require.Error(t, err)
		require.True(t, strings.HasSuffix(err.Error(), "is a directory"))
	})
}

func TestReadSecretFromFile(t *testing.T) {
	f, err := os.CreateTemp(t.TempDir(), "mmctl")
	require.NoError(t, err)

	_, err = f.WriteString("test-pass")
	require.NoError(t, err)

	t.Run("password from file", func(t *testing.T) {
		var pass string
		err := readSecretFromFile(f.Name(), &pass)
		require.NoError(t, err)
		require.Equal(t, "test-pass", pass)
	})

	t.Run("no file path is provided", func(t *testing.T) {
		pass := "test-pass-2"
		err := readSecretFromFile("", &pass)
		require.NoError(t, err)
		require.Equal(t, "test-pass-2", pass)
	})

	t.Run("nonexistent file provided", func(t *testing.T) {
		var pass string
		err := readSecretFromFile(filepath.Join(t.TempDir(), "bla"), &pass)
		require.Error(t, err)
		require.Empty(t, pass)
	})
}