package data

import (
	"errors"
	"path/filepath"
	"sort"
	"strings"
	"time"

	"github.com/owncast/owncast/config"
	"github.com/owncast/owncast/models"
	"github.com/owncast/owncast/utils"
	log "github.com/sirupsen/logrus"
)

const (
	extraContentKey                 = "extra_page_content"
	streamTitleKey                  = "stream_title"
	streamKeyKey                    = "stream_key"
	logoPathKey                     = "logo_path"
	serverSummaryKey                = "server_summary"
	serverWelcomeMessageKey         = "server_welcome_message"
	serverNameKey                   = "server_name"
	serverURLKey                    = "server_url"
	httpPortNumberKey               = "http_port_number"
	httpListenAddressKey            = "http_listen_address"
	websocketHostOverrideKey        = "websocket_host_override"
	rtmpPortNumberKey               = "rtmp_port_number"
	serverMetadataTagsKey           = "server_metadata_tags"
	directoryEnabledKey             = "directory_enabled"
	directoryRegistrationKeyKey     = "directory_registration_key"
	socialHandlesKey                = "social_handles"
	peakViewersSessionKey           = "peak_viewers_session"
	peakViewersOverallKey           = "peak_viewers_overall"
	lastDisconnectTimeKey           = "last_disconnect_time"
	ffmpegPathKey                   = "ffmpeg_path"
	nsfwKey                         = "nsfw"
	s3StorageEnabledKey             = "s3_storage_enabled"
	s3StorageConfigKey              = "s3_storage_config"
	videoLatencyLevel               = "video_latency_level"
	videoStreamOutputVariantsKey    = "video_stream_output_variants"
	chatDisabledKey                 = "chat_disabled"
	externalActionsKey              = "external_actions"
	customStylesKey                 = "custom_styles"
	videoCodecKey                   = "video_codec"
	blockedUsernamesKey             = "blocked_usernames"
	publicKeyKey                    = "public_key"
	privateKeyKey                   = "private_key"
	serverInitDateKey               = "server_init_date"
	federationEnabledKey            = "federation_enabled"
	federationUsernameKey           = "federation_username"
	federationPrivateKey            = "federation_private"
	federationGoLiveMessageKey      = "federation_go_live_message"
	federationShowEngagementKey     = "federation_show_engagement"
	federationBlockedDomainsKey     = "federation_blocked_domains"
	suggestedUsernamesKey           = "suggested_usernames"
	chatJoinMessagesEnabledKey      = "chat_join_messages_enabled"
	chatEstablishedUsersOnlyModeKey = "chat_established_users_only_mode"
)

// GetExtraPageBodyContent will return the user-supplied body content.
func GetExtraPageBodyContent() string {
	content, err := _datastore.GetString(extraContentKey)
	if err != nil {
		log.Traceln(extraContentKey, err)
		return config.GetDefaults().PageBodyContent
	}

	return content
}

// SetExtraPageBodyContent will set the user-supplied body content.
func SetExtraPageBodyContent(content string) error {
	return _datastore.SetString(extraContentKey, content)
}

// GetStreamTitle will return the name of the current stream.
func GetStreamTitle() string {
	title, err := _datastore.GetString(streamTitleKey)
	if err != nil {
		return ""
	}

	return title
}

// SetStreamTitle will set the name of the current stream.
func SetStreamTitle(title string) error {
	return _datastore.SetString(streamTitleKey, title)
}

// GetStreamKey will return the inbound streaming password.
func GetStreamKey() string {
	key, err := _datastore.GetString(streamKeyKey)
	if err != nil {
		log.Traceln(streamKeyKey, err)
		return config.GetDefaults().StreamKey
	}

	return key
}

// SetStreamKey will set the inbound streaming password.
func SetStreamKey(key string) error {
	return _datastore.SetString(streamKeyKey, key)
}

// GetLogoPath will return the path for the logo, relative to webroot.
func GetLogoPath() string {
	logo, err := _datastore.GetString(logoPathKey)
	if err != nil {
		log.Traceln(logoPathKey, err)
		return config.GetDefaults().Logo
	}

	if logo == "" {
		return config.GetDefaults().Logo
	}

	return logo
}

// SetLogoPath will set the path for the logo, relative to webroot.
func SetLogoPath(logo string) error {
	return _datastore.SetString(logoPathKey, logo)
}

// GetServerSummary will return the server summary text.
func GetServerSummary() string {
	summary, err := _datastore.GetString(serverSummaryKey)
	if err != nil {
		log.Traceln(serverSummaryKey, err)
		return ""
	}

	return summary
}

// SetServerSummary will set the server summary text.
func SetServerSummary(summary string) error {
	return _datastore.SetString(serverSummaryKey, summary)
}

// GetServerWelcomeMessage will return the server welcome message text.
func GetServerWelcomeMessage() string {
	welcomeMessage, err := _datastore.GetString(serverWelcomeMessageKey)
	if err != nil {
		log.Traceln(serverWelcomeMessageKey, err)
		return config.GetDefaults().ServerWelcomeMessage
	}

	return welcomeMessage
}

// SetServerWelcomeMessage will set the server welcome message text.
func SetServerWelcomeMessage(welcomeMessage string) error {
	return _datastore.SetString(serverWelcomeMessageKey, welcomeMessage)
}

// GetServerName will return the server name text.
func GetServerName() string {
	name, err := _datastore.GetString(serverNameKey)
	if err != nil {
		log.Traceln(serverNameKey, err)
		return config.GetDefaults().Name
	}

	return name
}

// SetServerName will set the server name text.
func SetServerName(name string) error {
	return _datastore.SetString(serverNameKey, name)
}

// GetServerURL will return the server URL.
func GetServerURL() string {
	url, err := _datastore.GetString(serverURLKey)
	if err != nil {
		return ""
	}

	return url
}

// SetServerURL will set the server URL.
func SetServerURL(url string) error {
	return _datastore.SetString(serverURLKey, url)
}

// GetHTTPPortNumber will return the server HTTP port.
func GetHTTPPortNumber() int {
	port, err := _datastore.GetNumber(httpPortNumberKey)
	if err != nil {
		log.Traceln(httpPortNumberKey, err)
		return config.GetDefaults().WebServerPort
	}

	if port == 0 {
		return config.GetDefaults().WebServerPort
	}
	return int(port)
}

// SetWebsocketOverrideHost will set the host override for websockets.
func SetWebsocketOverrideHost(host string) error {
	return _datastore.SetString(websocketHostOverrideKey, host)
}

// GetWebsocketOverrideHost will return the host override for websockets.
func GetWebsocketOverrideHost() string {
	host, _ := _datastore.GetString(websocketHostOverrideKey)

	return host
}

// SetHTTPPortNumber will set the server HTTP port.
func SetHTTPPortNumber(port float64) error {
	return _datastore.SetNumber(httpPortNumberKey, port)
}

// GetHTTPListenAddress will return the HTTP listen address.
func GetHTTPListenAddress() string {
	address, err := _datastore.GetString(httpListenAddressKey)
	if err != nil {
		log.Traceln(httpListenAddressKey, err)
		return config.GetDefaults().WebServerIP
	}
	return address
}

// SetHTTPListenAddress will set the server HTTP listen address.
func SetHTTPListenAddress(address string) error {
	return _datastore.SetString(httpListenAddressKey, address)
}

// GetRTMPPortNumber will return the server RTMP port.
func GetRTMPPortNumber() int {
	port, err := _datastore.GetNumber(rtmpPortNumberKey)
	if err != nil {
		log.Traceln(rtmpPortNumberKey, err)
		return config.GetDefaults().RTMPServerPort
	}

	if port == 0 {
		return config.GetDefaults().RTMPServerPort
	}

	return int(port)
}

// SetRTMPPortNumber will set the server RTMP port.
func SetRTMPPortNumber(port float64) error {
	return _datastore.SetNumber(rtmpPortNumberKey, port)
}

// GetServerMetadataTags will return the metadata tags.
func GetServerMetadataTags() []string {
	tagsString, err := _datastore.GetString(serverMetadataTagsKey)
	if tagsString == "" {
		return []string{}
	}

	if err != nil {
		log.Traceln(serverMetadataTagsKey, err)
		return []string{}
	}

	return strings.Split(tagsString, ",")
}

// SetServerMetadataTags will return the metadata tags.
func SetServerMetadataTags(tags []string) error {
	tagString := strings.Join(tags, ",")
	return _datastore.SetString(serverMetadataTagsKey, tagString)
}

// GetDirectoryEnabled will return if this server should register to YP.
func GetDirectoryEnabled() bool {
	enabled, err := _datastore.GetBool(directoryEnabledKey)
	if err != nil {
		return config.GetDefaults().YPEnabled
	}

	return enabled
}

// SetDirectoryEnabled will set if this server should register to YP.
func SetDirectoryEnabled(enabled bool) error {
	return _datastore.SetBool(directoryEnabledKey, enabled)
}

// SetDirectoryRegistrationKey will set the YP protocol registration key.
func SetDirectoryRegistrationKey(key string) error {
	return _datastore.SetString(directoryRegistrationKeyKey, key)
}

// GetDirectoryRegistrationKey will return the YP protocol registration key.
func GetDirectoryRegistrationKey() string {
	key, _ := _datastore.GetString(directoryRegistrationKeyKey)
	return key
}

// GetSocialHandles will return the external social links.
func GetSocialHandles() []models.SocialHandle {
	var socialHandles []models.SocialHandle

	configEntry, err := _datastore.Get(socialHandlesKey)
	if err != nil {
		log.Traceln(socialHandlesKey, err)
		return socialHandles
	}

	if err := configEntry.getObject(&socialHandles); err != nil {
		log.Traceln(err)
		return socialHandles
	}

	return socialHandles
}

// SetSocialHandles will set the external social links.
func SetSocialHandles(socialHandles []models.SocialHandle) error {
	configEntry := ConfigEntry{Key: socialHandlesKey, Value: socialHandles}
	return _datastore.Save(configEntry)
}

// GetPeakSessionViewerCount will return the max number of viewers for this stream.
func GetPeakSessionViewerCount() int {
	count, err := _datastore.GetNumber(peakViewersSessionKey)
	if err != nil {
		return 0
	}
	return int(count)
}

// SetPeakSessionViewerCount will set the max number of viewers for this stream.
func SetPeakSessionViewerCount(count int) error {
	return _datastore.SetNumber(peakViewersSessionKey, float64(count))
}

// GetPeakOverallViewerCount will return the overall max number of viewers.
func GetPeakOverallViewerCount() int {
	count, err := _datastore.GetNumber(peakViewersOverallKey)
	if err != nil {
		return 0
	}
	return int(count)
}

// SetPeakOverallViewerCount will set the overall max number of viewers.
func SetPeakOverallViewerCount(count int) error {
	return _datastore.SetNumber(peakViewersOverallKey, float64(count))
}

// GetLastDisconnectTime will return the time the last stream ended.
func GetLastDisconnectTime() (*utils.NullTime, error) {
	var disconnectTime utils.NullTime

	configEntry, err := _datastore.Get(lastDisconnectTimeKey)
	if err != nil {
		return nil, err
	}

	if err := configEntry.getObject(&disconnectTime); err != nil {
		return nil, err
	}

	if !disconnectTime.Valid || disconnectTime.Time.IsZero() {
		return nil, err
	}

	return &disconnectTime, nil
}

// SetLastDisconnectTime will set the time the last stream ended.
func SetLastDisconnectTime(disconnectTime time.Time) error {
	savedDisconnectTime := utils.NullTime{Time: disconnectTime, Valid: true}
	configEntry := ConfigEntry{Key: lastDisconnectTimeKey, Value: savedDisconnectTime}
	return _datastore.Save(configEntry)
}

// SetNSFW will set if this stream has NSFW content.
func SetNSFW(isNSFW bool) error {
	return _datastore.SetBool(nsfwKey, isNSFW)
}

// GetNSFW will return if this stream has NSFW content.
func GetNSFW() bool {
	nsfw, err := _datastore.GetBool(nsfwKey)
	if err != nil {
		return false
	}
	return nsfw
}

// SetFfmpegPath will set the custom ffmpeg path.
func SetFfmpegPath(path string) error {
	return _datastore.SetString(ffmpegPathKey, path)
}

// GetFfMpegPath will return the ffmpeg path.
func GetFfMpegPath() string {
	path, err := _datastore.GetString(ffmpegPathKey)
	if err != nil {
		return ""
	}
	return path
}

// GetS3Config will return the external storage configuration.
func GetS3Config() models.S3 {
	configEntry, err := _datastore.Get(s3StorageConfigKey)
	if err != nil {
		return models.S3{Enabled: false}
	}

	var s3Config models.S3
	if err := configEntry.getObject(&s3Config); err != nil {
		return models.S3{Enabled: false}
	}

	return s3Config
}

// SetS3Config will set the external storage configuration.
func SetS3Config(config models.S3) error {
	configEntry := ConfigEntry{Key: s3StorageConfigKey, Value: config}
	return _datastore.Save(configEntry)
}

// GetS3StorageEnabled will return if external storage is enabled.
func GetS3StorageEnabled() bool {
	enabled, err := _datastore.GetBool(s3StorageEnabledKey)
	if err != nil {
		log.Traceln(err)
		return false
	}

	return enabled
}

// SetS3StorageEnabled will enable or disable external storage.
func SetS3StorageEnabled(enabled bool) error {
	return _datastore.SetBool(s3StorageEnabledKey, enabled)
}

// GetStreamLatencyLevel will return the stream latency level.
func GetStreamLatencyLevel() models.LatencyLevel {
	level, err := _datastore.GetNumber(videoLatencyLevel)
	if err != nil {
		level = 2 // default
	} else if level > 4 {
		level = 4 // highest
	}

	return models.GetLatencyLevel(int(level))
}

// SetStreamLatencyLevel will set the stream latency level.
func SetStreamLatencyLevel(level float64) error {
	return _datastore.SetNumber(videoLatencyLevel, level)
}

// GetStreamOutputVariants will return all of the stream output variants.
func GetStreamOutputVariants() []models.StreamOutputVariant {
	configEntry, err := _datastore.Get(videoStreamOutputVariantsKey)
	if err != nil {
		return config.GetDefaults().StreamVariants
	}

	var streamOutputVariants []models.StreamOutputVariant
	if err := configEntry.getObject(&streamOutputVariants); err != nil {
		return config.GetDefaults().StreamVariants
	}

	if len(streamOutputVariants) == 0 {
		return config.GetDefaults().StreamVariants
	}

	return streamOutputVariants
}

// SetStreamOutputVariants will set the stream output variants.
func SetStreamOutputVariants(variants []models.StreamOutputVariant) error {
	configEntry := ConfigEntry{Key: videoStreamOutputVariantsKey, Value: variants}
	return _datastore.Save(configEntry)
}

// SetChatDisabled will disable chat if set to true.
func SetChatDisabled(disabled bool) error {
	return _datastore.SetBool(chatDisabledKey, disabled)
}

// GetChatDisabled will return if chat is disabled.
func GetChatDisabled() bool {
	disabled, err := _datastore.GetBool(chatDisabledKey)
	if err == nil {
		return disabled
	}

	return false
}

// SetChatEstablishedUsersOnlyMode sets the state of established user only mode.
func SetChatEstablishedUsersOnlyMode(enabled bool) error {
	return _datastore.SetBool(chatEstablishedUsersOnlyModeKey, enabled)
}

// GetChatEstbalishedUsersOnlyMode returns the state of established user only mode.
func GetChatEstbalishedUsersOnlyMode() bool {
	enabled, err := _datastore.GetBool(chatEstablishedUsersOnlyModeKey)
	if err == nil {
		return enabled
	}

	return false
}

// GetExternalActions will return the registered external actions.
func GetExternalActions() []models.ExternalAction {
	configEntry, err := _datastore.Get(externalActionsKey)
	if err != nil {
		return []models.ExternalAction{}
	}

	var externalActions []models.ExternalAction
	if err := configEntry.getObject(&externalActions); err != nil {
		return []models.ExternalAction{}
	}

	return externalActions
}

// SetExternalActions will save external actions.
func SetExternalActions(actions []models.ExternalAction) error {
	configEntry := ConfigEntry{Key: externalActionsKey, Value: actions}
	return _datastore.Save(configEntry)
}

// SetCustomStyles will save a string with CSS to insert into the page.
func SetCustomStyles(styles string) error {
	return _datastore.SetString(customStylesKey, styles)
}

// GetCustomStyles will return a string with CSS to insert into the page.
func GetCustomStyles() string {
	style, err := _datastore.GetString(customStylesKey)
	if err != nil {
		return ""
	}

	return style
}

// SetVideoCodec will set the codec used for video encoding.
func SetVideoCodec(codec string) error {
	return _datastore.SetString(videoCodecKey, codec)
}

// GetVideoCodec returns the codec to use for transcoding video.
func GetVideoCodec() string {
	codec, err := _datastore.GetString(videoCodecKey)
	if codec == "" || err != nil {
		return "libx264" // Default value
	}

	return codec
}

// VerifySettings will perform a sanity check for specific settings values.
func VerifySettings() error {
	if GetStreamKey() == "" {
		return errors.New("no stream key set. Please set one via the admin or command line arguments")
	}

	logoPath := GetLogoPath()
	if !utils.DoesFileExists(filepath.Join(config.DataDirectory, logoPath)) {
		defaultLogo := filepath.Join(config.WebRoot, "img/logo.svg")
		log.Traceln(logoPath, "not found in the data directory. copying a default logo.")
		if err := utils.Copy(defaultLogo, filepath.Join(config.DataDirectory, "logo.svg")); err != nil {
			log.Errorln("error copying default logo: ", err)
		}
		if err := SetLogoPath("logo.svg"); err != nil {
			log.Errorln("unable to set default logo to logo.svg", err)
		}
	}

	return nil
}

// FindHighestVideoQualityIndex will return the highest quality from a slice of variants.
func FindHighestVideoQualityIndex(qualities []models.StreamOutputVariant) int {
	type IndexedQuality struct {
		index   int
		quality models.StreamOutputVariant
	}

	if len(qualities) < 2 {
		return 0
	}

	indexedQualities := make([]IndexedQuality, 0)
	for index, quality := range qualities {
		indexedQuality := IndexedQuality{index, quality}
		indexedQualities = append(indexedQualities, indexedQuality)
	}

	sort.Slice(indexedQualities, func(a, b int) bool {
		if indexedQualities[a].quality.IsVideoPassthrough && !indexedQualities[b].quality.IsVideoPassthrough {
			return true
		}

		if !indexedQualities[a].quality.IsVideoPassthrough && indexedQualities[b].quality.IsVideoPassthrough {
			return false
		}

		return indexedQualities[a].quality.VideoBitrate > indexedQualities[b].quality.VideoBitrate
	})

	return indexedQualities[0].index
}

// GetForbiddenUsernameList will return the blocked usernames as a comma separated string.
func GetForbiddenUsernameList() []string {
	usernameString, err := _datastore.GetString(blockedUsernamesKey)
	if err != nil {
		return config.DefaultForbiddenUsernames
	}

	if usernameString == "" {
		return config.DefaultForbiddenUsernames
	}

	blocklist := strings.Split(usernameString, ",")

	return blocklist
}

// SetForbiddenUsernameList set the username blocklist as a comma separated string.
func SetForbiddenUsernameList(usernames []string) error {
	usernameListString := strings.Join(usernames, ",")
	return _datastore.SetString(blockedUsernamesKey, usernameListString)
}

// GetSuggestedUsernamesList will return the suggested usernames as a comma separated string.
// If the number of suggested usernames is smaller than 10, the number pool is not used (see code in the CreateAnonymousUser function).
func GetSuggestedUsernamesList() []string {
	usernameString, err := _datastore.GetString(suggestedUsernamesKey)

	if err != nil || usernameString == "" {
		return []string{}
	}

	suggestionList := strings.Split(usernameString, ",")

	return suggestionList
}

// SetSuggestedUsernamesList sets the username suggestion list as a comma separated string.
func SetSuggestedUsernamesList(usernames []string) error {
	usernameListString := strings.Join(usernames, ",")
	return _datastore.SetString(suggestedUsernamesKey, usernameListString)
}

// GetServerInitTime will return when the server was first setup.
func GetServerInitTime() (*utils.NullTime, error) {
	var t utils.NullTime

	configEntry, err := _datastore.Get(serverInitDateKey)
	if err != nil {
		return nil, err
	}

	if err := configEntry.getObject(&t); err != nil {
		return nil, err
	}

	if !t.Valid {
		return nil, err
	}

	return &t, nil
}

// SetServerInitTime will set when the server was first created.
func SetServerInitTime(t time.Time) error {
	nt := utils.NullTime{Time: t, Valid: true}
	configEntry := ConfigEntry{Key: serverInitDateKey, Value: nt}
	return _datastore.Save(configEntry)
}

// SetFederationEnabled will enable federation if set to true.
func SetFederationEnabled(enabled bool) error {
	return _datastore.SetBool(federationEnabledKey, enabled)
}

// GetFederationEnabled will return if federation is enabled.
func GetFederationEnabled() bool {
	enabled, err := _datastore.GetBool(federationEnabledKey)
	if err == nil {
		return enabled
	}

	return false
}

// SetFederationUsername will set the username used in federated activities.
func SetFederationUsername(username string) error {
	return _datastore.SetString(federationUsernameKey, username)
}

// GetFederationUsername will return the username used in federated activities.
func GetFederationUsername() string {
	username, err := _datastore.GetString(federationUsernameKey)
	if username == "" || err != nil {
		return config.GetDefaults().FederationUsername
	}

	return username
}

// SetFederationGoLiveMessage will set the message sent when going live.
func SetFederationGoLiveMessage(message string) error {
	return _datastore.SetString(federationGoLiveMessageKey, message)
}

// GetFederationGoLiveMessage will return the message sent when going live.
func GetFederationGoLiveMessage() string {
	// Empty message means it's disabled.
	message, err := _datastore.GetString(federationGoLiveMessageKey)
	if err != nil {
		log.Traceln("unable to fetch go live message.", err)
	}

	return message
}

// SetFederationIsPrivate will set if federation activity is private.
func SetFederationIsPrivate(isPrivate bool) error {
	return _datastore.SetBool(federationPrivateKey, isPrivate)
}

// GetFederationIsPrivate will return if federation is private.
func GetFederationIsPrivate() bool {
	isPrivate, err := _datastore.GetBool(federationPrivateKey)
	if err == nil {
		return isPrivate
	}

	return false
}

// SetFederationShowEngagement will set if fediverse engagement shows in chat.
func SetFederationShowEngagement(showEngagement bool) error {
	return _datastore.SetBool(federationShowEngagementKey, showEngagement)
}

// GetFederationShowEngagement will return if fediverse engagement shows in chat.
func GetFederationShowEngagement() bool {
	showEngagement, err := _datastore.GetBool(federationShowEngagementKey)
	if err == nil {
		return showEngagement
	}

	return true
}

// SetBlockedFederatedDomains will set the blocked federated domains.
func SetBlockedFederatedDomains(domains []string) error {
	return _datastore.SetString(federationBlockedDomainsKey, strings.Join(domains, ","))
}

// GetBlockedFederatedDomains will return a list of blocked federated domains.
func GetBlockedFederatedDomains() []string {
	domains, err := _datastore.GetString(federationBlockedDomainsKey)
	if err != nil {
		return []string{}
	}

	if domains == "" {
		return []string{}
	}

	return strings.Split(domains, ",")
}

// SetChatJoinMessagesEnabled will set if chat join messages are enabled.
func SetChatJoinMessagesEnabled(enabled bool) error {
	return _datastore.SetBool(chatJoinMessagesEnabledKey, enabled)
}

// GetChatJoinMessagesEnabled will return if chat join messages are enabled.
func GetChatJoinMessagesEnabled() bool {
	enabled, err := _datastore.GetBool(chatJoinMessagesEnabledKey)
	if err != nil {
		return true
	}

	return enabled
}