package config

import (
	"fmt"
	"os"
	"path/filepath"
	"regexp"
	"runtime"
	"strings"

	"sync"
	// "github.com/sasha-s/go-deadlock" // if you have deadlock issues

	"golang.org/x/crypto/bcrypt"

	"github.com/spf13/viper"

	"github.com/stashapp/stash/pkg/fsutil"
	"github.com/stashapp/stash/pkg/hash"
	"github.com/stashapp/stash/pkg/logger"
	"github.com/stashapp/stash/pkg/models"
	"github.com/stashapp/stash/pkg/models/paths"
)

var officialBuild string

const (
	Stash         = "stash"
	Cache         = "cache"
	Generated     = "generated"
	Metadata      = "metadata"
	Downloads     = "downloads"
	ApiKey        = "api_key"
	Username      = "username"
	Password      = "password"
	MaxSessionAge = "max_session_age"

	DefaultMaxSessionAge = 60 * 60 * 1 // 1 hours

	Database = "database"

	Exclude      = "exclude"
	ImageExclude = "image_exclude"

	VideoExtensions            = "video_extensions"
	ImageExtensions            = "image_extensions"
	GalleryExtensions          = "gallery_extensions"
	CreateGalleriesFromFolders = "create_galleries_from_folders"

	// CalculateMD5 is the config key used to determine if MD5 should be calculated
	// for video files.
	CalculateMD5 = "calculate_md5"

	// VideoFileNamingAlgorithm is the config key used to determine what hash
	// should be used when generating and using generated files for scenes.
	VideoFileNamingAlgorithm = "video_file_naming_algorithm"

	MaxTranscodeSize          = "max_transcode_size"
	MaxStreamingTranscodeSize = "max_streaming_transcode_size"

	ParallelTasks        = "parallel_tasks"
	parallelTasksDefault = 1

	PreviewPreset = "preview_preset"

	PreviewAudio        = "preview_audio"
	previewAudioDefault = true

	PreviewSegmentDuration        = "preview_segment_duration"
	previewSegmentDurationDefault = 0.75

	PreviewSegments        = "preview_segments"
	previewSegmentsDefault = 12

	PreviewExcludeStart        = "preview_exclude_start"
	previewExcludeStartDefault = "0"

	PreviewExcludeEnd        = "preview_exclude_end"
	previewExcludeEndDefault = "0"

	WriteImageThumbnails        = "write_image_thumbnails"
	writeImageThumbnailsDefault = true

	Host        = "host"
	hostDefault = "0.0.0.0"

	Port        = "port"
	portDefault = 9999

	ExternalHost = "external_host"

	// key used to sign JWT tokens
	JWTSignKey = "jwt_secret_key"

	// key used for session store
	SessionStoreKey = "session_store_key"

	// scraping options
	ScrapersPath              = "scrapers_path"
	ScraperUserAgent          = "scraper_user_agent"
	ScraperCertCheck          = "scraper_cert_check"
	ScraperCDPPath            = "scraper_cdp_path"
	ScraperExcludeTagPatterns = "scraper_exclude_tag_patterns"

	// stash-box options
	StashBoxes = "stash_boxes"

	PythonPath = "python_path"

	// plugin options
	PluginsPath = "plugins_path"

	// i18n
	Language = "language"

	// served directories
	// this should be manually configured only
	CustomServedFolders = "custom_served_folders"

	// UI directory. Overrides to serve the UI from a specific location
	// rather than use the embedded UI.
	CustomUILocation = "custom_ui_location"

	// Interface options
	MenuItems = "menu_items"

	SoundOnPreview = "sound_on_preview"

	WallShowTitle        = "wall_show_title"
	defaultWallShowTitle = true

	CustomPerformerImageLocation        = "custom_performer_image_location"
	MaximumLoopDuration                 = "maximum_loop_duration"
	AutostartVideo                      = "autostart_video"
	AutostartVideoOnPlaySelected        = "autostart_video_on_play_selected"
	autostartVideoOnPlaySelectedDefault = true
	ContinuePlaylistDefault             = "continue_playlist_default"
	ShowStudioAsText                    = "show_studio_as_text"
	CSSEnabled                          = "cssEnabled"

	ShowScrubber        = "show_scrubber"
	showScrubberDefault = true

	WallPlayback        = "wall_playback"
	defaultWallPlayback = "video"

	// Image lightbox options
	legacyImageLightboxSlideshowDelay       = "slideshow_delay"
	ImageLightboxSlideshowDelay             = "image_lightbox.slideshow_delay"
	ImageLightboxDisplayMode                = "image_lightbox.display_mode"
	ImageLightboxScaleUp                    = "image_lightbox.scale_up"
	ImageLightboxResetZoomOnNav             = "image_lightbox.reset_zoom_on_nav"
	ImageLightboxScrollMode                 = "image_lightbox.scroll_mode"
	ImageLightboxScrollAttemptsBeforeChange = "image_lightbox.scroll_attempts_before_change"

	defaultImageLightboxSlideshowDelay = 5000

	DisableDropdownCreatePerformer = "disable_dropdown_create.performer"
	DisableDropdownCreateStudio    = "disable_dropdown_create.studio"
	DisableDropdownCreateTag       = "disable_dropdown_create.tag"

	HandyKey        = "handy_key"
	FunscriptOffset = "funscript_offset"

	ThemeColor        = "theme_color"
	DefaultThemeColor = "#202b33"

	// Security
	dangerousAllowPublicWithoutAuth                   = "dangerous_allow_public_without_auth"
	dangerousAllowPublicWithoutAuthDefault            = "false"
	SecurityTripwireAccessedFromPublicInternet        = "security_tripwire_accessed_from_public_internet"
	securityTripwireAccessedFromPublicInternetDefault = ""

	// DLNA options
	DLNAServerName         = "dlna.server_name"
	DLNADefaultEnabled     = "dlna.default_enabled"
	DLNADefaultIPWhitelist = "dlna.default_whitelist"
	DLNAInterfaces         = "dlna.interfaces"

	// Logging options
	LogFile          = "logFile"
	LogOut           = "logOut"
	defaultLogOut    = true
	LogLevel         = "logLevel"
	defaultLogLevel  = "Info"
	LogAccess        = "logAccess"
	defaultLogAccess = true

	// Default settings
	DefaultScanSettings     = "defaults.scan_task"
	DefaultIdentifySettings = "defaults.identify_task"
	DefaultAutoTagSettings  = "defaults.auto_tag_task"
	DefaultGenerateSettings = "defaults.generate_task"

	DeleteFileDefault             = "defaults.delete_file"
	DeleteGeneratedDefault        = "defaults.delete_generated"
	deleteGeneratedDefaultDefault = true

	// Desktop Integration Options
	NoBrowser                           = "noBrowser"
	NoBrowserDefault                    = false
	NotificationsEnabled                = "notifications_enabled"
	NotificationsEnabledDefault         = true
	ShowOneTimeMovedNotification        = "show_one_time_moved_notification"
	ShowOneTimeMovedNotificationDefault = false

	// File upload options
	MaxUploadSize = "max_upload_size"
)

// slice default values
var (
	defaultVideoExtensions   = []string{"m4v", "mp4", "mov", "wmv", "avi", "mpg", "mpeg", "rmvb", "rm", "flv", "asf", "mkv", "webm"}
	defaultImageExtensions   = []string{"png", "jpg", "jpeg", "gif", "webp"}
	defaultGalleryExtensions = []string{"zip", "cbz"}
	defaultMenuItems         = []string{"scenes", "images", "movies", "markers", "galleries", "performers", "studios", "tags"}
)

type MissingConfigError struct {
	missingFields []string
}

func (e MissingConfigError) Error() string {
	return fmt.Sprintf("missing the following mandatory settings: %s", strings.Join(e.missingFields, ", "))
}

// StashBoxError represents configuration errors of Stash-Box
type StashBoxError struct {
	msg string
}

func (s *StashBoxError) Error() string {
	// "Stash-box" is a proper noun and is therefore capitcalized
	return "Stash-box: " + s.msg
}

func IsOfficialBuild() bool {
	return officialBuild == "true"
}

type Instance struct {
	// main instance - backed by config file
	main *viper.Viper

	// override instance - populated from flags/environment
	// not written to config file
	overrides *viper.Viper

	cpuProfilePath string
	isNewSystem    bool
	// configUpdates  chan int
	certFile string
	keyFile  string
	sync.RWMutex
	// deadlock.RWMutex // for deadlock testing/issues
}

var instance *Instance

func (i *Instance) IsNewSystem() bool {
	return i.isNewSystem
}

func (i *Instance) SetConfigFile(fn string) {
	i.Lock()
	defer i.Unlock()
	i.main.SetConfigFile(fn)
}

func (i *Instance) InitTLS() {
	configDirectory := i.GetConfigPath()
	tlsPaths := []string{
		configDirectory,
		paths.GetStashHomeDirectory(),
	}

	i.certFile = fsutil.FindInPaths(tlsPaths, "stash.crt")
	i.keyFile = fsutil.FindInPaths(tlsPaths, "stash.key")
}

func (i *Instance) GetTLSFiles() (certFile, keyFile string) {
	return i.certFile, i.keyFile
}

func (i *Instance) HasTLSConfig() bool {
	certFile, keyFile := i.GetTLSFiles()
	return certFile != "" && keyFile != ""
}

// GetCPUProfilePath returns the path to the CPU profile file to output
// profiling info to. This is set only via a commandline flag. Returns an
// empty string if not set.
func (i *Instance) GetCPUProfilePath() string {
	return i.cpuProfilePath
}

func (i *Instance) GetNoBrowser() bool {
	return i.getBool(NoBrowser)
}

func (i *Instance) GetNotificationsEnabled() bool {
	return i.getBool(NotificationsEnabled)
}

// func (i *Instance) GetConfigUpdatesChannel() chan int {
// 	return i.configUpdates
// }

// GetShowOneTimeMovedNotification shows whether a small notification to inform the user that Stash
// will no longer show a terminal window, and instead will be available in the tray, should be shown.
//  It is true when an existing system is started after upgrading, and set to false forever after it is shown.
func (i *Instance) GetShowOneTimeMovedNotification() bool {
	return i.getBool(ShowOneTimeMovedNotification)
}

func (i *Instance) Set(key string, value interface{}) {
	// if key == MenuItems {
	// 	i.configUpdates <- 0
	// }
	i.Lock()
	defer i.Unlock()
	i.main.Set(key, value)
}

func (i *Instance) SetPassword(value string) {
	// if blank, don't bother hashing; we want it to be blank
	if value == "" {
		i.Set(Password, "")
	} else {
		i.Set(Password, hashPassword(value))
	}
}

func (i *Instance) Write() error {
	i.Lock()
	defer i.Unlock()
	return i.main.WriteConfig()
}

// FileEnvSet returns true if the configuration file environment parameter
// is set.
func FileEnvSet() bool {
	return os.Getenv("STASH_CONFIG_FILE") != ""
}

// GetConfigFile returns the full path to the used configuration file.
func (i *Instance) GetConfigFile() string {
	i.RLock()
	defer i.RUnlock()
	return i.main.ConfigFileUsed()
}

// GetConfigPath returns the path of the directory containing the used
// configuration file.
func (i *Instance) GetConfigPath() string {
	return filepath.Dir(i.GetConfigFile())
}

// GetDefaultDatabaseFilePath returns the default database filename,
// which is located in the same directory as the config file.
func (i *Instance) GetDefaultDatabaseFilePath() string {
	return filepath.Join(i.GetConfigPath(), "stash-go.sqlite")
}

// viper returns the viper instance that should be used to get the provided
// key. Returns the overrides instance if the key exists there, otherwise it
// returns the main instance. Assumes read lock held.
func (i *Instance) viper(key string) *viper.Viper {
	v := i.main
	if i.overrides.IsSet(key) {
		v = i.overrides
	}

	return v
}

// viper returns the viper instance that has the key set. Returns nil
// if no instance has the key. Assumes read lock held.
func (i *Instance) viperWith(key string) *viper.Viper {
	v := i.viper(key)

	if v.IsSet(key) {
		return v
	}

	return nil
}

func (i *Instance) HasOverride(key string) bool {
	i.RLock()
	defer i.RUnlock()

	return i.overrides.IsSet(key)
}

// These functions wrap the equivalent viper functions, checking the override
// instance first, then the main instance.

func (i *Instance) unmarshalKey(key string, rawVal interface{}) error {
	i.RLock()
	defer i.RUnlock()

	return i.viper(key).UnmarshalKey(key, rawVal)
}

func (i *Instance) getStringSlice(key string) []string {
	i.RLock()
	defer i.RUnlock()

	return i.viper(key).GetStringSlice(key)
}

func (i *Instance) getString(key string) string {
	i.RLock()
	defer i.RUnlock()

	return i.viper(key).GetString(key)
}

func (i *Instance) getBool(key string) bool {
	i.RLock()
	defer i.RUnlock()

	return i.viper(key).GetBool(key)
}

func (i *Instance) getBoolDefault(key string, def bool) bool {
	i.RLock()
	defer i.RUnlock()

	ret := def
	v := i.viper(key)
	if v.IsSet(key) {
		ret = v.GetBool(key)
	}
	return ret
}

func (i *Instance) getInt(key string) int {
	i.RLock()
	defer i.RUnlock()

	return i.viper(key).GetInt(key)
}

func (i *Instance) getFloat64(key string) float64 {
	i.RLock()
	defer i.RUnlock()

	return i.viper(key).GetFloat64(key)
}

func (i *Instance) getStringMapString(key string) map[string]string {
	i.RLock()
	defer i.RUnlock()

	return i.viper(key).GetStringMapString(key)
}

// GetStathPaths returns the configured stash library paths.
// Works opposite to the usual case - it will return the override
// value only if the main value is not set.
func (i *Instance) GetStashPaths() []*models.StashConfig {
	i.RLock()
	defer i.RUnlock()

	var ret []*models.StashConfig

	v := i.main
	if !v.IsSet(Stash) {
		v = i.overrides
	}

	if err := v.UnmarshalKey(Stash, &ret); err != nil || len(ret) == 0 {
		// fallback to legacy format
		ss := v.GetStringSlice(Stash)
		ret = nil
		for _, path := range ss {
			toAdd := &models.StashConfig{
				Path: path,
			}
			ret = append(ret, toAdd)
		}
	}

	return ret
}

func (i *Instance) GetCachePath() string {
	return i.getString(Cache)
}

func (i *Instance) GetGeneratedPath() string {
	return i.getString(Generated)
}

func (i *Instance) GetMetadataPath() string {
	return i.getString(Metadata)
}

func (i *Instance) GetDatabasePath() string {
	return i.getString(Database)
}

func (i *Instance) GetJWTSignKey() []byte {
	return []byte(i.getString(JWTSignKey))
}

func (i *Instance) GetSessionStoreKey() []byte {
	return []byte(i.getString(SessionStoreKey))
}

func (i *Instance) GetDefaultScrapersPath() string {
	// default to the same directory as the config file
	fn := filepath.Join(i.GetConfigPath(), "scrapers")

	return fn
}

func (i *Instance) GetExcludes() []string {
	return i.getStringSlice(Exclude)
}

func (i *Instance) GetImageExcludes() []string {
	return i.getStringSlice(ImageExclude)
}

func (i *Instance) GetVideoExtensions() []string {
	ret := i.getStringSlice(VideoExtensions)
	if ret == nil {
		ret = defaultVideoExtensions
	}
	return ret
}

func (i *Instance) GetImageExtensions() []string {
	ret := i.getStringSlice(ImageExtensions)
	if ret == nil {
		ret = defaultImageExtensions
	}
	return ret
}

func (i *Instance) GetGalleryExtensions() []string {
	ret := i.getStringSlice(GalleryExtensions)
	if ret == nil {
		ret = defaultGalleryExtensions
	}
	return ret
}

func (i *Instance) GetCreateGalleriesFromFolders() bool {
	return i.getBool(CreateGalleriesFromFolders)
}

func (i *Instance) GetLanguage() string {
	ret := i.getString(Language)

	// default to English
	if ret == "" {
		return "en-US"
	}

	return ret
}

// IsCalculateMD5 returns true if MD5 checksums should be generated for
// scene video files.
func (i *Instance) IsCalculateMD5() bool {
	return i.getBool(CalculateMD5)
}

// GetVideoFileNamingAlgorithm returns what hash algorithm should be used for
// naming generated scene video files.
func (i *Instance) GetVideoFileNamingAlgorithm() models.HashAlgorithm {
	ret := i.getString(VideoFileNamingAlgorithm)

	// default to oshash
	if ret == "" {
		return models.HashAlgorithmOshash
	}

	return models.HashAlgorithm(ret)
}

func (i *Instance) GetScrapersPath() string {
	return i.getString(ScrapersPath)
}

func (i *Instance) GetScraperUserAgent() string {
	return i.getString(ScraperUserAgent)
}

// GetScraperCDPPath gets the path to the Chrome executable or remote address
// to an instance of Chrome.
func (i *Instance) GetScraperCDPPath() string {
	return i.getString(ScraperCDPPath)
}

// GetScraperCertCheck returns true if the scraper should check for insecure
// certificates when fetching an image or a page.
func (i *Instance) GetScraperCertCheck() bool {
	return i.getBoolDefault(ScraperCertCheck, true)
}

func (i *Instance) GetScraperExcludeTagPatterns() []string {
	return i.getStringSlice(ScraperExcludeTagPatterns)
}

func (i *Instance) GetStashBoxes() models.StashBoxes {
	var boxes models.StashBoxes
	if err := i.unmarshalKey(StashBoxes, &boxes); err != nil {
		logger.Warnf("error in unmarshalkey: %v", err)
	}

	return boxes
}

func (i *Instance) GetDefaultPluginsPath() string {
	// default to the same directory as the config file
	fn := filepath.Join(i.GetConfigPath(), "plugins")

	return fn
}

func (i *Instance) GetPluginsPath() string {
	return i.getString(PluginsPath)
}

func (i *Instance) GetPythonPath() string {
	return i.getString(PythonPath)
}

func (i *Instance) GetHost() string {
	ret := i.getString(Host)
	if ret == "" {
		ret = hostDefault
	}

	return ret
}

func (i *Instance) GetPort() int {
	ret := i.getInt(Port)
	if ret == 0 {
		ret = portDefault
	}

	return ret
}

func (i *Instance) GetThemeColor() string {
	return i.getString(ThemeColor)
}

func (i *Instance) GetExternalHost() string {
	return i.getString(ExternalHost)
}

// GetPreviewSegmentDuration returns the duration of a single segment in a
// scene preview file, in seconds.
func (i *Instance) GetPreviewSegmentDuration() float64 {
	return i.getFloat64(PreviewSegmentDuration)
}

// GetParallelTasks returns the number of parallel tasks that should be started
// by scan or generate task.
func (i *Instance) GetParallelTasks() int {
	return i.getInt(ParallelTasks)
}

func (i *Instance) GetParallelTasksWithAutoDetection() int {
	parallelTasks := i.getInt(ParallelTasks)
	if parallelTasks <= 0 {
		parallelTasks = (runtime.NumCPU() / 4) + 1
	}
	return parallelTasks
}

func (i *Instance) GetPreviewAudio() bool {
	return i.getBool(PreviewAudio)
}

// GetPreviewSegments returns the amount of segments in a scene preview file.
func (i *Instance) GetPreviewSegments() int {
	return i.getInt(PreviewSegments)
}

// GetPreviewExcludeStart returns the configuration setting string for
// excluding the start of scene videos for preview generation. This can
// be in two possible formats. A float value is interpreted as the amount
// of seconds to exclude from the start of the video before it is included
// in the preview. If the value is suffixed with a '%' character (for example
// '2%'), then it is interpreted as a proportion of the total video duration.
func (i *Instance) GetPreviewExcludeStart() string {
	return i.getString(PreviewExcludeStart)
}

// GetPreviewExcludeEnd returns the configuration setting string for
// excluding the end of scene videos for preview generation. A float value
// is interpreted as the amount of seconds to exclude from the end of the video
// when generating previews. If the value is suffixed with a '%' character,
// then it is interpreted as a proportion of the total video duration.
func (i *Instance) GetPreviewExcludeEnd() string {
	return i.getString(PreviewExcludeEnd)
}

// GetPreviewPreset returns the preset when generating previews. Defaults to
// Slow.
func (i *Instance) GetPreviewPreset() models.PreviewPreset {
	ret := i.getString(PreviewPreset)

	// default to slow
	if ret == "" {
		return models.PreviewPresetSlow
	}

	return models.PreviewPreset(ret)
}

func (i *Instance) GetMaxTranscodeSize() models.StreamingResolutionEnum {
	ret := i.getString(MaxTranscodeSize)

	// default to original
	if ret == "" {
		return models.StreamingResolutionEnumOriginal
	}

	return models.StreamingResolutionEnum(ret)
}

func (i *Instance) GetMaxStreamingTranscodeSize() models.StreamingResolutionEnum {
	ret := i.getString(MaxStreamingTranscodeSize)

	// default to original
	if ret == "" {
		return models.StreamingResolutionEnumOriginal
	}

	return models.StreamingResolutionEnum(ret)
}

// IsWriteImageThumbnails returns true if image thumbnails should be written
// to disk after generating on the fly.
func (i *Instance) IsWriteImageThumbnails() bool {
	return i.getBool(WriteImageThumbnails)
}

func (i *Instance) GetAPIKey() string {
	return i.getString(ApiKey)
}

func (i *Instance) GetUsername() string {
	return i.getString(Username)
}

func (i *Instance) GetPasswordHash() string {
	return i.getString(Password)
}

func (i *Instance) GetCredentials() (string, string) {
	if i.HasCredentials() {
		return i.getString(Username), i.getString(Password)
	}

	return "", ""
}

func (i *Instance) HasCredentials() bool {
	username := i.getString(Username)
	pwHash := i.getString(Password)

	return username != "" && pwHash != ""
}

func hashPassword(password string) string {
	hash, _ := bcrypt.GenerateFromPassword([]byte(password), bcrypt.MinCost)

	return string(hash)
}

func (i *Instance) ValidateCredentials(username string, password string) bool {
	if !i.HasCredentials() {
		// don't need to authenticate if no credentials saved
		return true
	}

	authUser, authPWHash := i.GetCredentials()

	err := bcrypt.CompareHashAndPassword([]byte(authPWHash), []byte(password))

	return username == authUser && err == nil
}

var stashBoxRe = regexp.MustCompile("^http.*graphql$")

func (i *Instance) ValidateStashBoxes(boxes []*models.StashBoxInput) error {
	isMulti := len(boxes) > 1

	for _, box := range boxes {
		// Validate each stash-box configuration field, return on error
		if box.APIKey == "" {
			return &StashBoxError{msg: "API Key cannot be blank"}
		}

		if box.Endpoint == "" {
			return &StashBoxError{msg: "endpoint cannot be blank"}
		}

		if !stashBoxRe.Match([]byte(box.Endpoint)) {
			return &StashBoxError{msg: "endpoint is invalid"}
		}

		if isMulti && box.Name == "" {
			return &StashBoxError{msg: "name cannot be blank"}
		}
	}

	return nil
}

// GetMaxSessionAge gets the maximum age for session cookies, in seconds.
// Session cookie expiry times are refreshed every request.
func (i *Instance) GetMaxSessionAge() int {
	i.RLock()
	defer i.RUnlock()

	ret := DefaultMaxSessionAge
	v := i.viper(MaxSessionAge)
	if v.IsSet(MaxSessionAge) {
		ret = v.GetInt(MaxSessionAge)
	}

	return ret
}

// GetCustomServedFolders gets the map of custom paths to their applicable
// filesystem locations
func (i *Instance) GetCustomServedFolders() URLMap {
	return i.getStringMapString(CustomServedFolders)
}

func (i *Instance) GetCustomUILocation() string {
	return i.getString(CustomUILocation)
}

// Interface options
func (i *Instance) GetMenuItems() []string {
	i.RLock()
	defer i.RUnlock()
	v := i.viper(MenuItems)
	if v.IsSet(MenuItems) {
		return v.GetStringSlice(MenuItems)
	}
	return defaultMenuItems
}

func (i *Instance) GetSoundOnPreview() bool {
	return i.getBool(SoundOnPreview)
}

func (i *Instance) GetWallShowTitle() bool {
	i.RLock()
	defer i.RUnlock()

	ret := defaultWallShowTitle
	v := i.viper(WallShowTitle)
	if v.IsSet(WallShowTitle) {
		ret = v.GetBool(WallShowTitle)
	}
	return ret
}

func (i *Instance) GetCustomPerformerImageLocation() string {
	return i.getString(CustomPerformerImageLocation)
}

func (i *Instance) GetWallPlayback() string {
	i.RLock()
	defer i.RUnlock()

	ret := defaultWallPlayback
	v := i.viper(WallPlayback)
	if v.IsSet(WallPlayback) {
		ret = v.GetString(WallPlayback)
	}

	return ret
}

func (i *Instance) GetShowScrubber() bool {
	return i.getBoolDefault(ShowScrubber, showScrubberDefault)
}

func (i *Instance) GetMaximumLoopDuration() int {
	return i.getInt(MaximumLoopDuration)
}

func (i *Instance) GetAutostartVideo() bool {
	return i.getBool(AutostartVideo)
}

func (i *Instance) GetAutostartVideoOnPlaySelected() bool {
	return i.getBoolDefault(AutostartVideoOnPlaySelected, autostartVideoOnPlaySelectedDefault)
}

func (i *Instance) GetContinuePlaylistDefault() bool {
	return i.getBool(ContinuePlaylistDefault)
}

func (i *Instance) GetShowStudioAsText() bool {
	return i.getBool(ShowStudioAsText)
}

func (i *Instance) getSlideshowDelay() int {
	// assume have lock

	ret := defaultImageLightboxSlideshowDelay
	v := i.viper(ImageLightboxSlideshowDelay)
	if v.IsSet(ImageLightboxSlideshowDelay) {
		ret = v.GetInt(ImageLightboxSlideshowDelay)
	} else {
		// fallback to old location
		v := i.viper(legacyImageLightboxSlideshowDelay)
		if v.IsSet(legacyImageLightboxSlideshowDelay) {
			ret = v.GetInt(legacyImageLightboxSlideshowDelay)
		}
	}

	return ret
}

func (i *Instance) GetImageLightboxOptions() models.ConfigImageLightboxResult {
	i.RLock()
	defer i.RUnlock()

	delay := i.getSlideshowDelay()

	ret := models.ConfigImageLightboxResult{
		SlideshowDelay: &delay,
	}

	if v := i.viperWith(ImageLightboxDisplayMode); v != nil {
		mode := models.ImageLightboxDisplayMode(v.GetString(ImageLightboxDisplayMode))
		ret.DisplayMode = &mode
	}
	if v := i.viperWith(ImageLightboxScaleUp); v != nil {
		value := v.GetBool(ImageLightboxScaleUp)
		ret.ScaleUp = &value
	}
	if v := i.viperWith(ImageLightboxResetZoomOnNav); v != nil {
		value := v.GetBool(ImageLightboxResetZoomOnNav)
		ret.ResetZoomOnNav = &value
	}
	if v := i.viperWith(ImageLightboxScrollMode); v != nil {
		mode := models.ImageLightboxScrollMode(v.GetString(ImageLightboxScrollMode))
		ret.ScrollMode = &mode
	}
	if v := i.viperWith(ImageLightboxScrollAttemptsBeforeChange); v != nil {
		ret.ScrollAttemptsBeforeChange = v.GetInt(ImageLightboxScrollAttemptsBeforeChange)
	}

	return ret
}

func (i *Instance) GetDisableDropdownCreate() *models.ConfigDisableDropdownCreate {
	return &models.ConfigDisableDropdownCreate{
		Performer: i.getBool(DisableDropdownCreatePerformer),
		Studio:    i.getBool(DisableDropdownCreateStudio),
		Tag:       i.getBool(DisableDropdownCreateTag),
	}
}

func (i *Instance) GetCSSPath() string {
	// use custom.css in the same directory as the config file
	configFileUsed := i.GetConfigFile()
	configDir := filepath.Dir(configFileUsed)

	fn := filepath.Join(configDir, "custom.css")

	return fn
}

func (i *Instance) GetCSS() string {
	fn := i.GetCSSPath()

	exists, _ := fsutil.FileExists(fn)
	if !exists {
		return ""
	}

	buf, err := os.ReadFile(fn)

	if err != nil {
		return ""
	}

	return string(buf)
}

func (i *Instance) SetCSS(css string) {
	fn := i.GetCSSPath()
	i.Lock()
	defer i.Unlock()

	buf := []byte(css)

	if err := os.WriteFile(fn, buf, 0777); err != nil {
		logger.Warnf("error while writing %v bytes to %v: %v", len(buf), fn, err)
	}
}

func (i *Instance) GetCSSEnabled() bool {
	return i.getBool(CSSEnabled)
}

func (i *Instance) GetHandyKey() string {
	return i.getString(HandyKey)
}

func (i *Instance) GetFunscriptOffset() int {
	return i.getInt(FunscriptOffset)
}

func (i *Instance) GetDeleteFileDefault() bool {
	return i.getBool(DeleteFileDefault)
}

func (i *Instance) GetDeleteGeneratedDefault() bool {
	return i.getBoolDefault(DeleteGeneratedDefault, deleteGeneratedDefaultDefault)
}

// GetDefaultIdentifySettings returns the default Identify task settings.
// Returns nil if the settings could not be unmarshalled, or if it
// has not been set.
func (i *Instance) GetDefaultIdentifySettings() *models.IdentifyMetadataTaskOptions {
	i.RLock()
	defer i.RUnlock()
	v := i.viper(DefaultIdentifySettings)

	if v.IsSet(DefaultIdentifySettings) {
		var ret models.IdentifyMetadataTaskOptions
		if err := v.UnmarshalKey(DefaultIdentifySettings, &ret); err != nil {
			return nil
		}
		return &ret
	}

	return nil
}

// GetDefaultScanSettings returns the default Scan task settings.
// Returns nil if the settings could not be unmarshalled, or if it
// has not been set.
func (i *Instance) GetDefaultScanSettings() *models.ScanMetadataOptions {
	i.RLock()
	defer i.RUnlock()
	v := i.viper(DefaultScanSettings)

	if v.IsSet(DefaultScanSettings) {
		var ret models.ScanMetadataOptions
		if err := v.UnmarshalKey(DefaultScanSettings, &ret); err != nil {
			return nil
		}
		return &ret
	}

	return nil
}

// GetDefaultAutoTagSettings returns the default Scan task settings.
// Returns nil if the settings could not be unmarshalled, or if it
// has not been set.
func (i *Instance) GetDefaultAutoTagSettings() *models.AutoTagMetadataOptions {
	i.RLock()
	defer i.RUnlock()
	v := i.viper(DefaultAutoTagSettings)

	if v.IsSet(DefaultAutoTagSettings) {
		var ret models.AutoTagMetadataOptions
		if err := v.UnmarshalKey(DefaultAutoTagSettings, &ret); err != nil {
			return nil
		}
		return &ret
	}

	return nil
}

// GetDefaultGenerateSettings returns the default Scan task settings.
// Returns nil if the settings could not be unmarshalled, or if it
// has not been set.
func (i *Instance) GetDefaultGenerateSettings() *models.GenerateMetadataOptions {
	i.RLock()
	defer i.RUnlock()
	v := i.viper(DefaultGenerateSettings)

	if v.IsSet(DefaultGenerateSettings) {
		var ret models.GenerateMetadataOptions
		if err := v.UnmarshalKey(DefaultGenerateSettings, &ret); err != nil {
			return nil
		}
		return &ret
	}

	return nil
}

// GetDangerousAllowPublicWithoutAuth determines if the security feature is enabled.
// See https://github.com/stashapp/stash/wiki/Authentication-Required-When-Accessing-Stash-From-the-Internet
func (i *Instance) GetDangerousAllowPublicWithoutAuth() bool {
	return i.getBool(dangerousAllowPublicWithoutAuth)
}

// GetSecurityTripwireAccessedFromPublicInternet returns a public IP address if stash
// has been accessed from the public internet, with no auth enabled, and
// DangerousAllowPublicWithoutAuth disabled. Returns an empty string otherwise.
func (i *Instance) GetSecurityTripwireAccessedFromPublicInternet() string {
	return i.getString(SecurityTripwireAccessedFromPublicInternet)
}

// GetDLNAServerName returns the visible name of the DLNA server. If empty,
// "stash" will be used.
func (i *Instance) GetDLNAServerName() string {
	return i.getString(DLNAServerName)
}

// GetDLNADefaultEnabled returns true if the DLNA is enabled by default.
func (i *Instance) GetDLNADefaultEnabled() bool {
	return i.getBool(DLNADefaultEnabled)
}

// GetDLNADefaultIPWhitelist returns a list of IP addresses/wildcards that
// are allowed to use the DLNA service.
func (i *Instance) GetDLNADefaultIPWhitelist() []string {
	return i.getStringSlice(DLNADefaultIPWhitelist)
}

// GetDLNAInterfaces returns a list of interface names to expose DLNA on. If
// empty, runs on all interfaces.
func (i *Instance) GetDLNAInterfaces() []string {
	return i.getStringSlice(DLNAInterfaces)
}

// GetLogFile returns the filename of the file to output logs to.
// An empty string means that file logging will be disabled.
func (i *Instance) GetLogFile() string {
	return i.getString(LogFile)
}

// GetLogOut returns true if logging should be output to the terminal
// in addition to writing to a log file. Logging will be output to the
// terminal if file logging is disabled. Defaults to true.
func (i *Instance) GetLogOut() bool {
	return i.getBoolDefault(LogOut, defaultLogOut)
}

// GetLogLevel returns the lowest log level to write to the log.
// Should be one of "Debug", "Info", "Warning", "Error"
func (i *Instance) GetLogLevel() string {
	value := i.getString(LogLevel)
	if value != "Debug" && value != "Info" && value != "Warning" && value != "Error" && value != "Trace" {
		value = defaultLogLevel
	}

	return value
}

// GetLogAccess returns true if http requests should be logged to the terminal.
// HTTP requests are not logged to the log file. Defaults to true.
func (i *Instance) GetLogAccess() bool {
	return i.getBoolDefault(LogAccess, defaultLogAccess)
}

// Max allowed graphql upload size in megabytes
func (i *Instance) GetMaxUploadSize() int64 {
	i.RLock()
	defer i.RUnlock()
	ret := int64(1024)

	v := i.viper(MaxUploadSize)
	if v.IsSet(MaxUploadSize) {
		ret = v.GetInt64(MaxUploadSize)
	}
	return ret << 20
}

// ActivatePublicAccessTripwire sets the security_tripwire_accessed_from_public_internet
// config field to the provided IP address to indicate that stash has been accessed
// from this public IP without authentication.
func (i *Instance) ActivatePublicAccessTripwire(requestIP string) error {
	i.Set(SecurityTripwireAccessedFromPublicInternet, requestIP)
	return i.Write()
}

func (i *Instance) Validate() error {
	i.RLock()
	defer i.RUnlock()
	mandatoryPaths := []string{
		Database,
		Generated,
	}

	var missingFields []string

	for _, p := range mandatoryPaths {
		if !i.viper(p).IsSet(p) || i.viper(p).GetString(p) == "" {
			missingFields = append(missingFields, p)
		}
	}

	if len(missingFields) > 0 {
		return MissingConfigError{
			missingFields: missingFields,
		}
	}

	return nil
}

func (i *Instance) SetChecksumDefaultValues(defaultAlgorithm models.HashAlgorithm, usingMD5 bool) {
	i.Lock()
	defer i.Unlock()
	i.main.SetDefault(VideoFileNamingAlgorithm, defaultAlgorithm)
	i.main.SetDefault(CalculateMD5, usingMD5)
}

func (i *Instance) setDefaultValues(write bool) error {
	// read data before write lock scope
	defaultDatabaseFilePath := i.GetDefaultDatabaseFilePath()
	defaultScrapersPath := i.GetDefaultScrapersPath()
	defaultPluginsPath := i.GetDefaultPluginsPath()

	i.Lock()
	defer i.Unlock()

	// set the default host and port so that these are written to the config
	// file
	i.main.SetDefault(Host, hostDefault)
	i.main.SetDefault(Port, portDefault)

	i.main.SetDefault(ParallelTasks, parallelTasksDefault)
	i.main.SetDefault(PreviewSegmentDuration, previewSegmentDurationDefault)
	i.main.SetDefault(PreviewSegments, previewSegmentsDefault)
	i.main.SetDefault(PreviewExcludeStart, previewExcludeStartDefault)
	i.main.SetDefault(PreviewExcludeEnd, previewExcludeEndDefault)
	i.main.SetDefault(PreviewAudio, previewAudioDefault)
	i.main.SetDefault(SoundOnPreview, false)

	i.main.SetDefault(ThemeColor, DefaultThemeColor)

	i.main.SetDefault(WriteImageThumbnails, writeImageThumbnailsDefault)

	i.main.SetDefault(Database, defaultDatabaseFilePath)

	i.main.SetDefault(dangerousAllowPublicWithoutAuth, dangerousAllowPublicWithoutAuthDefault)
	i.main.SetDefault(SecurityTripwireAccessedFromPublicInternet, securityTripwireAccessedFromPublicInternetDefault)

	// Set generated to the metadata path for backwards compat
	i.main.SetDefault(Generated, i.main.GetString(Metadata))

	i.main.SetDefault(NoBrowser, NoBrowserDefault)
	i.main.SetDefault(NotificationsEnabled, NotificationsEnabledDefault)
	i.main.SetDefault(ShowOneTimeMovedNotification, ShowOneTimeMovedNotificationDefault)

	// Set default scrapers and plugins paths
	i.main.SetDefault(ScrapersPath, defaultScrapersPath)
	i.main.SetDefault(PluginsPath, defaultPluginsPath)
	if write {
		return i.main.WriteConfig()
	}

	return nil
}

// setExistingSystemDefaults sets config options that are new and unset in an existing install,
// but should have a separate default than for brand-new systems, to maintain behavior.
func (i *Instance) setExistingSystemDefaults() error {
	i.Lock()
	defer i.Unlock()
	if !i.isNewSystem {
		configDirtied := false

		// Existing systems as of the introduction of auto-browser open should retain existing
		// behavior and not start the browser automatically.
		if !i.main.InConfig(NoBrowser) {
			configDirtied = true
			i.main.Set(NoBrowser, true)
		}

		// Existing systems as of the introduction of the taskbar should inform users.
		if !i.main.InConfig(ShowOneTimeMovedNotification) {
			configDirtied = true
			i.main.Set(ShowOneTimeMovedNotification, true)
		}

		if configDirtied {
			return i.main.WriteConfig()
		}
	}

	return nil
}

// SetInitialConfig fills in missing required config fields
func (i *Instance) SetInitialConfig() error {
	return i.setInitialConfig(true)
}

// SetInitialMemoryConfig fills in missing required config fields without writing the configuration
func (i *Instance) SetInitialMemoryConfig() error {
	return i.setInitialConfig(false)
}

func (i *Instance) setInitialConfig(write bool) error {
	// generate some api keys
	const apiKeyLength = 32

	if string(i.GetJWTSignKey()) == "" {
		signKey, err := hash.GenerateRandomKey(apiKeyLength)
		if err != nil {
			return fmt.Errorf("error generating JWTSignKey: %w", err)
		}
		i.Set(JWTSignKey, signKey)
	}

	if string(i.GetSessionStoreKey()) == "" {
		sessionStoreKey, err := hash.GenerateRandomKey(apiKeyLength)
		if err != nil {
			return fmt.Errorf("error generating session store key: %w", err)
		}
		i.Set(SessionStoreKey, sessionStoreKey)
	}

	return i.setDefaultValues(write)
}

func (i *Instance) FinalizeSetup() {
	i.isNewSystem = false
	// i.configUpdates <- 0
}