package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/url"
	"os"
	"os/signal"
	"runtime"
	"strings"
	"sync"
	"syscall"
	"time"

	"github.com/ChimeraCoder/anaconda"
	"github.com/Davincible/goinsta/v3"
	"github.com/HouzuoGuo/tiedot/db"
	"github.com/Necroforger/dgrouter/exrouter"
	"github.com/bwmarrin/discordgo"
	"github.com/fatih/color"
	"github.com/fsnotify/fsnotify"
	"github.com/hako/durafmt"
	"github.com/rivo/duplo"
	orderedmap "github.com/wk8/go-ordered-map/v2"
)

var (
	err error

	mainWg sync.WaitGroup

	// Bot
	bot         *discordgo.Session
	botUser     *discordgo.User
	botCommands *exrouter.Route
	selfbot     bool = false
	botReady    bool = false

	// Storage
	myDB         *db.DB
	duploCatalog *duplo.Store

	// APIs
	twitterConnected   bool = false
	twitterClient      *anaconda.TwitterApi
	instagramConnected bool = false
	instagramClient    *goinsta.Instagram

	// Gen
	loop                 chan os.Signal
	startTime            time.Time
	timeLastUpdated      time.Time
	timeLastDownload     time.Time
	timeLastMessage      time.Time
	cachedDownloadID     int
	configReloadLastTime time.Time

	// Validation
	invalidAdminChannels []string
	invalidChannels      []string
	invalidCategories    []string
	invalidServers       []string
)

const (
	imgurClientID   = "08af502a9e70d65"
	sneakyUserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36"
)

func versions(multiline bool) string {
	if multiline {
		return fmt.Sprintf("%s/%s / %s\ndiscordgo v%s (API v%s)",
			runtime.GOOS, runtime.GOARCH, runtime.Version(), discordgo.VERSION, discordgo.APIVersion)
	} else {
		return fmt.Sprintf("%s/%s / %s / discordgo v%s (API v%s)",
			runtime.GOOS, runtime.GOARCH, runtime.Version(), discordgo.VERSION, discordgo.APIVersion)
	}
}

func init() {
	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
	log.SetOutput(color.Output)
	log.Println(color.HiCyanString(wrapHyphensW(fmt.Sprintf("Welcome to %s v%s", projectName, projectVersion))))

	loop = make(chan os.Signal, 1)
	startTime = time.Now()
	historyJobs = orderedmap.New[string, historyJob]()

	if len(os.Args) > 1 {
		configFileBase = os.Args[1]
	}

	log.Println(lg("Version", "", color.CyanString, versions(false)))

	// Github Update Check
	if config.GithubUpdateChecking {
		if !isLatestGithubRelease() {
			log.Println(lg("Version", "UPDATE", color.HiCyanString, "***\tUPDATE AVAILABLE\t***"))
			log.Println(lg("Version", "UPDATE", color.CyanString, projectReleaseURL))
			log.Println(lg("Version", "UPDATE", color.HiCyanString, "*** See changelog for information ***"))
			log.Println(lg("Version", "UPDATE", color.HiCyanString, "CHECK ALL CHANGELOGS SINCE YOUR LAST UPDATE"))
			log.Println(lg("Version", "UPDATE", color.HiCyanString, "SOME SETTINGS MAY NEED TO BE UPDATED"))
			time.Sleep(5 * time.Second)
		}
	}

	log.Println(lg("Info", "", color.HiCyanString, "** Need help? Discord: https://discord.gg/6Z6FJZVaDV **"))
}

func main() {

	loadConfig()
	openDatabase()

	// Regex
	mainWg.Add(1)
	go func() {
		if err = compileRegex(); err != nil {
			log.Println(lg("Regex", "", color.HiRedString, "Error initializing:\t%s", err))
			return
		}
		mainWg.Done()
	}()

	mainWg.Wait() // wait because credentials from json

	mainWg.Add(2)
	go botLoadAPIs()
	go botLoadDiscord()

	mainWg.Wait()

	//#region MAIN STARTUP COMPLETE

	if config.Debug {
		log.Println(lg("Main", "", color.YellowString, "Startup finished, took %s...", uptime()))
	}
	log.Println(lg("Main", "", color.HiCyanString,
		wrapHyphensW(fmt.Sprintf("%s v%s is online with access to %d server%s",
			projectLabel, projectVersion, len(bot.State.Guilds), pluralS(len(bot.State.Guilds))))))
	log.Println(lg("Main", "", color.RedString, "CTRL+C to exit..."))

	// Log Status
	go sendStatusMessage(sendStatusStartup)

	//#endregion

	//#region BG Tasks

	//#region BG Tasks - Tickers
	tickerCheckup := time.NewTicker(time.Duration(config.CheckupRate) * time.Minute)
	tickerPresence := time.NewTicker(time.Duration(config.PresenceRefreshRate) * time.Minute)
	tickerConnection := time.NewTicker(time.Duration(config.ConnectionCheckRate) * time.Minute)
	go func() {
		for {
			select {

			case <-tickerCheckup.C:
				if config.Debug {
					//MARKER: history jobs polled for waiting count in checkup
					historyJobsWaiting := 0
					if historyJobs.Len() > 0 {
						for jobPair := historyJobs.Oldest(); jobPair != nil; jobPair.Next() {
							job := jobPair.Value
							if job.Status == historyStatusWaiting {
								historyJobsWaiting++
							}
						}
					}
					str := fmt.Sprintf("... %dms latency,\t\tlast discord heartbeat %s ago,\t\t%s uptime",
						bot.HeartbeatLatency().Milliseconds(),
						shortenTime(durafmt.ParseShort(time.Since(bot.LastHeartbeatSent)).String()),
						shortenTime(durafmt.ParseShort(time.Since(startTime)).String()))
					if !timeLastMessage.IsZero() {
						str += fmt.Sprintf(",\tlast message %s ago",
							shortenTime(durafmt.ParseShort(time.Since(timeLastMessage)).String()))
					}
					if !timeLastDownload.IsZero() {
						str += fmt.Sprintf(",\tlast download %s ago",
							shortenTime(durafmt.ParseShort(time.Since(timeLastDownload)).String()))
					}
					if historyJobsWaiting > 0 {
						str += fmt.Sprintf(",\t%d history jobs waiting", historyJobsWaiting)
					}
					log.Println(lg("Checkup", "", color.YellowString, str))
				}

			case <-tickerPresence.C:
				// If bot experiences connection interruption the status will go blank until updated by message, this fixes that
				go updateDiscordPresence()

			case <-tickerConnection.C:
				doReconnect := func() {
					log.Println(lg("Discord", "", color.YellowString, "Closing Discord connections..."))
					bot.Client.CloseIdleConnections()
					bot.CloseWithCode(1001)
					bot = nil
					log.Println(lg("Discord", "", color.RedString, "Discord connections closed!"))
					time.Sleep(15 * time.Second)
					if config.ExitOnBadConnection {
						properExit()
					} else {
						log.Println(lg("Discord", "", color.GreenString, "Logging in..."))
						botLoad()
						log.Println(lg("Discord", "", color.HiGreenString,
							"Reconnected! The bot *should* resume working..."))
						// Log Status
						sendStatusMessage(sendStatusReconnect)
					}
				}
				gate, err := bot.Gateway()
				if err != nil || gate == "" {
					log.Println(lg("Discord", "", color.HiYellowString,
						"Bot encountered a gateway error: GATEWAY: %s,\tERR: %s", gate, err))
					doReconnect()
				} else if time.Since(bot.LastHeartbeatAck).Seconds() > 4*60 {
					log.Println(lg("Discord", "", color.HiYellowString,
						"Bot has not received a heartbeat from Discord in 4 minutes..."))
					doReconnect()
				}

			}
		}
	}()
	//#endregion

	//#region BG Tasks - Autorun History
	type arh struct{ channel, before, since string }
	var autoHistoryChannels []arh
	// Compile list of channels to autorun history
	for _, channel := range getAllRegisteredChannels() {
		channelConfig := getSource(&discordgo.Message{ChannelID: channel})
		if channelConfig.AutoHistory != nil {
			if *channelConfig.AutoHistory {
				var autoHistoryChannel arh
				autoHistoryChannel.channel = channel
				autoHistoryChannel.before = *channelConfig.AutoHistoryBefore
				autoHistoryChannel.since = *channelConfig.AutoHistorySince
				autoHistoryChannels = append(autoHistoryChannels, autoHistoryChannel)
			}
			continue
		}
	}
	// Process auto history
	for _, ah := range autoHistoryChannels {
		//MARKER: history jobs queued from auto
		if job, exists := historyJobs.Get(ah.channel); !exists ||
			(job.Status != historyStatusRunning && job.Status != historyStatusAbortRequested) {
			job.Status = historyStatusWaiting
			job.OriginChannel = "AUTORUN"
			job.OriginUser = "AUTORUN"
			job.TargetCommandingMessage = nil
			job.TargetChannelID = ah.channel
			job.TargetBefore = ah.before
			job.TargetSince = ah.since
			job.Updated = time.Now()
			job.Added = time.Now()
			historyJobs.Set(ah.channel, job)
			//TODO: signals for this and typical history cmd??
		}
	}
	if len(autoHistoryChannels) > 0 {
		log.Println(lg("History", "Autorun", color.HiYellowString,
			"History Autoruns completed (for %d channel%s)",
			len(autoHistoryChannels), pluralS(len(autoHistoryChannels))))
		log.Println(lg("History", "Autorun", color.CyanString,
			"Waiting for something else to do..."))
	}
	//#endregion

	//#region BG Tasks - History Job Processing
	go func() {
		for {
			// Empty Local Cache
			nhistoryJobCnt,
				nhistoryJobCntWaiting,
				nhistoryJobCntRunning,
				nhistoryJobCntAborted,
				nhistoryJobCntErrored,
				nhistoryJobCntCompleted := historyJobs.Len(), 0, 0, 0, 0, 0

			//MARKER: history jobs launch
			// do we even bother?
			if nhistoryJobCnt > 0 {
				// New Cache
				for pair := historyJobs.Oldest(); pair != nil; pair = pair.Next() {
					job := pair.Value
					if job.Status == historyStatusWaiting {
						nhistoryJobCntWaiting++
					} else if job.Status == historyStatusRunning {
						nhistoryJobCntRunning++
					} else if job.Status == historyStatusAbortRequested || job.Status == historyStatusAbortCompleted {
						nhistoryJobCntAborted++
					} else if job.Status == historyStatusErrorReadMessageHistoryPerms || job.Status == historyStatusErrorRequesting {
						nhistoryJobCntErrored++
					} else if job.Status >= historyStatusCompletedNoMoreMessages {
						nhistoryJobCntCompleted++
					}
				}

				// Should Start New Job(s)?
				if nhistoryJobCntRunning < config.HistoryMaxJobs || config.HistoryMaxJobs < 1 {
					openSlots := config.HistoryMaxJobs - nhistoryJobCntRunning
					newJobs := make([]historyJob, openSlots)
					filledSlots := 0
					// Find Jobs
					for pair := historyJobs.Oldest(); pair != nil; pair = pair.Next() {
						if filledSlots == openSlots {
							break
						}
						if pair.Value.Status == historyStatusWaiting {
							newJobs = append(newJobs, pair.Value)
							filledSlots++
						}
					}
					// Start Jobs
					if len(newJobs) > 0 {
						for _, job := range newJobs {
							if job != (historyJob{}) {
								go handleHistory(job.TargetCommandingMessage, job.TargetChannelID, job.TargetBefore, job.TargetSince)
							}
						}
					}
				}
			}

			// Update Cache
			historyJobCnt = nhistoryJobCnt
			historyJobCntWaiting = nhistoryJobCntWaiting
			historyJobCntRunning = nhistoryJobCntRunning
			historyJobCntAborted = nhistoryJobCntAborted
			historyJobCntErrored = nhistoryJobCntErrored
			historyJobCntCompleted = nhistoryJobCntCompleted

			//~ optional setting?
			time.Sleep(5 * time.Second)
		}
	}()
	//#endregion

	//#region BG Tasks - Settings Watcher
	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		log.Println(lg("Settings", "Watcher", color.HiRedString, "Error creating NewWatcher:\t%s", err))
	}
	defer watcher.Close()
	if err = watcher.Add(configFile); err != nil {
		log.Println(lg("Settings", "Watcher", color.HiRedString, "Error adding watcher for settings:\t%s", err))
	}
	go func() {
		for {
			select {
			case event, ok := <-watcher.Events:
				if !ok {
					return
				}
				if event.Op&fsnotify.Write == fsnotify.Write {
					// It double-fires the event without time check, might depend on OS but this works anyways
					if time.Since(configReloadLastTime).Milliseconds() > 1 {
						time.Sleep(1 * time.Second)
						log.Println(lg("Settings", "Watcher", color.YellowString,
							"Detected changes in \"%s\", reloading...", configFile))
						mainWg.Add(1)
						go loadConfig()
						allString := ""
						if config.All != nil {
							allString = ", ALL ENABLED"
						}
						log.Println(lg("Settings", "Watcher", color.HiYellowString,
							"Reloaded - bound to %d channel%s, %d categories, %d server%s, %d user%s%s",
							getBoundChannelsCount(), pluralS(getBoundChannelsCount()),
							getBoundCategoriesCount(),
							getBoundServersCount(), pluralS(getBoundServersCount()),
							getBoundUsersCount(), pluralS(getBoundUsersCount()), allString,
						))

						go updateDiscordPresence()
						go sendStatusMessage(sendStatusSettings)
						configReloadLastTime = time.Now()
					}
				}
			case err, ok := <-watcher.Errors:
				if !ok {
					return
				}
				log.Println(color.HiRedString("[Watchers] Error:\t%s", err))
			}
		}
	}()
	//#endregion

	//#endregion

	//#region Cache Constants
	constants := make(map[string]string)
	//--- Compile constants
	for _, server := range bot.State.Guilds {
		serverKey := fmt.Sprintf("SERVER_%s", stripSymbols(server.Name))
		serverKey = strings.ReplaceAll(serverKey, " ", "_")
		for strings.Contains(serverKey, "__") {
			serverKey = strings.ReplaceAll(serverKey, "__", "_")
		}
		serverKey = strings.ToUpper(serverKey)
		if constants[serverKey] == "" {
			constants[serverKey] = server.ID
		}
		for _, channel := range server.Channels {
			if channel.Type != discordgo.ChannelTypeGuildCategory {
				categoryName := ""
				if channel.ParentID != "" {
					channelParent, err := bot.State.Channel(channel.ParentID)
					if err == nil {
						categoryName = channelParent.Name
					}
				}
				channelKey := fmt.Sprintf("CHANNEL_%s_%s_%s",
					stripSymbols(server.Name), stripSymbols(categoryName), stripSymbols(channel.Name))
				channelKey = strings.ReplaceAll(channelKey, " ", "_")
				for strings.Contains(channelKey, "__") {
					channelKey = strings.ReplaceAll(channelKey, "__", "_")
				}
				channelKey = strings.ToUpper(channelKey)
				if constants[channelKey] == "" {
					constants[channelKey] = channel.ID
				}
			}
		}
	}
	//--- Save constants
	os.MkdirAll(cachePath, 0755)
	if _, err := os.Stat(constantsPath); err == nil {
		err = os.Remove(constantsPath)
		if err != nil {
			log.Println(lg("Constants", "", color.HiRedString, "Encountered error deleting cache file:\t%s", err))
		}
	}
	constantsStruct := constStruct{}
	constantsStruct.Constants = constants
	newJson, err := json.MarshalIndent(constantsStruct, "", "\t")
	if err != nil {
		log.Println(lg("Constants", "", color.HiRedString, "Failed to format constants...\t%s", err))
	} else {
		err := os.WriteFile(constantsPath, newJson, 0644)
		if err != nil {
			log.Println(lg("Constants", "", color.HiRedString, "Failed to save new constants file...\t%s", err))
		}
	}
	//#endregion

	// ~~~ RUNNING

	//#region ----------- TEST ENV / main

	//#endregion ------------------------

	//#region Exit...
	signal.Notify(loop, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT, os.Interrupt, os.Kill)
	<-loop

	sendStatusMessage(sendStatusExit) // not goroutine because we want to wait to send this before logout

	log.Println(lg("Discord", "", color.GreenString, "Logging out of discord..."))
	bot.Close()

	log.Println(lg("Database", "", color.YellowString, "Closing database..."))
	myDB.Close()

	log.Println(lg("Main", "", color.HiRedString, "Exiting... "))
	//#endregion
}

func openDatabase() {
	// Database
	log.Println(lg("Database", "", color.YellowString, "Opening database...\t(this can take a second...)"))
	myDB, err = db.OpenDB(databasePath)
	if err != nil {
		log.Println(lg("Database", "", color.HiRedString, "Unable to open database: %s", err))
		return
	}
	if myDB.Use("Downloads") == nil {
		log.Println(lg("Database", "Setup", color.YellowString, "Creating database, please wait..."))
		if err := myDB.Create("Downloads"); err != nil {
			log.Println(lg("Database", "Setup", color.HiRedString, "Error while trying to create database: %s", err))
			return
		}
		log.Println(lg("Database", "Setup", color.HiYellowString, "Created new database..."))
		log.Println(lg("Database", "Setup", color.YellowString, "Indexing database, please wait..."))
		if err := myDB.Use("Downloads").Index([]string{"URL"}); err != nil {
			log.Println(lg("Database", "Setup", color.HiRedString, "Unable to create database index for URL: %s", err))
			return
		}
		if err := myDB.Use("Downloads").Index([]string{"ChannelID"}); err != nil {
			log.Println(lg("Database", "Setup", color.HiRedString, "Unable to create database index for ChannelID: %s", err))
			return
		}
		if err := myDB.Use("Downloads").Index([]string{"UserID"}); err != nil {
			log.Println(lg("Database", "Setup", color.HiRedString, "Unable to create database index for UserID: %s", err))
			return
		}
		log.Println(lg("Database", "Setup", color.HiYellowString, "Created new indexes..."))
	}
	// Cache download tally
	cachedDownloadID = dbDownloadCount()
	log.Println(lg("Database", "", color.HiYellowString, "Database opened, contains %d entries...", cachedDownloadID))

	// Duplo
	if config.Duplo || sourceHasDuplo {
		duploCatalog = duplo.New()
		if _, err := os.Stat(duploCatalogPath); err == nil {
			log.Println(lg("Duplo", "", color.YellowString, "Opening duplo image catalog..."))
			storeFile, err := ioutil.ReadFile(duploCatalogPath)
			if err != nil {
				log.Println(lg("Duplo", "", color.HiRedString, "Error opening duplo catalog:\t%s", err))
			} else {
				err = duploCatalog.GobDecode(storeFile)
				if err != nil {
					log.Println(lg("Duplo", "", color.HiRedString, "Error decoding duplo catalog:\t%s", err))
				}
				if duploCatalog != nil {
					log.Println(lg("Duplo", "", color.HiYellowString, "Duplo catalog opened (%d)", duploCatalog.Size()))
				}
			}
		}
	}
}

func botLoad() {
	mainWg.Add(1)
	botLoadAPIs()
	mainWg.Add(1)
	botLoadDiscord()
}

func botLoadAPIs() {
	// Twitter API
	go func() {
		if config.Credentials.TwitterAccessToken != "" &&
			config.Credentials.TwitterAccessTokenSecret != "" &&
			config.Credentials.TwitterConsumerKey != "" &&
			config.Credentials.TwitterConsumerSecret != "" {

			log.Println(lg("API", "Twitter", color.MagentaString, "Connecting to API..."))

			twitterLoginCount := 0
		do_twitter_login:
			twitterLoginCount++
			if twitterLoginCount > 1 {
				time.Sleep(3 * time.Second)
			}
			twitterClient = anaconda.NewTwitterApiWithCredentials(
				config.Credentials.TwitterAccessToken,
				config.Credentials.TwitterAccessTokenSecret,
				config.Credentials.TwitterConsumerKey,
				config.Credentials.TwitterConsumerSecret,
			)
			twitterSelf, err := twitterClient.GetSelf(url.Values{})
			if err != nil {
				log.Println(lg("API", "Twitter", color.HiRedString, "API Login Error:\n%s", err.Error()))
				if twitterLoginCount <= 3 {
					goto do_twitter_login
				} else {
					log.Println(lg("API", "Twitter", color.HiRedString,
						"Failed to login to Twitter API, the bot will not fetch tweet media..."))
				}

			} else {
				log.Println(lg("API", "Twitter", color.HiMagentaString,
					"Connected to API @%s", twitterSelf.ScreenName))
				twitterConnected = true
			}
		} else {
			log.Println(lg("API", "Twitter", color.MagentaString,
				"API credentials missing, the bot won't use the Twitter API."))
		}
	}()

	// Instagram API
	go func() {
		if config.Credentials.InstagramUsername != "" &&
			config.Credentials.InstagramPassword != "" {

			log.Println(lg("API", "Instagram", color.MagentaString, "Connecting to API..."))

			instagramLoginCount := 0
		do_instagram_login:
			instagramLoginCount++
			if instagramLoginCount > 1 {
				time.Sleep(3 * time.Second)
			}
			if instagramClient, err = goinsta.Import(instagramCachePath); err != nil {
				instagramClient = goinsta.New(config.Credentials.InstagramUsername, config.Credentials.InstagramPassword)
				if err := instagramClient.Login(); err != nil {
					log.Println(lg("API", "Instagram", color.HiRedString, "API Login Error: %s", err.Error()))
					if instagramLoginCount <= 3 {
						goto do_instagram_login
					} else {
						log.Println(lg("API", "Instagram", color.HiRedString,
							"Failed to login to Instagram API, the bot will not fetch instagram media..."))
					}
				} else {
					log.Println(lg("API", "Instagram", color.HiMagentaString,
						"Connected to API @%s via new login", instagramClient.Account.Username))
					instagramConnected = true
					defer instagramClient.Export(instagramCachePath)
				}
			} else {
				log.Println(lg("API", "Instagram", color.HiMagentaString,
					"Connected to API @%s via cache", instagramClient.Account.Username))
				instagramConnected = true
			}
		} else {
			log.Println(lg("API", "Instagram", color.MagentaString,
				"API credentials missing, the bot won't use the Instagram API."))
		}
	}()

	mainWg.Done()
}

func botLoadDiscord() {
	var err error

	// Discord Login
	connectBot := func() {
		// Connect Bot
		bot.LogLevel = -1 // to ignore dumb wsapi error
		err = bot.Open()
		if err != nil && !strings.Contains(strings.ToLower(err.Error()), "web socket already opened") {
			log.Println(lg("Discord", "", color.HiRedString, "Discord login failed:\t%s", err))
			properExit()
		}

		bot.LogLevel = config.DiscordLogLevel // reset
		bot.ShouldReconnectOnError = true
		dur, err := time.ParseDuration(fmt.Sprint(config.DiscordTimeout) + "s")
		if err != nil {
			dur, _ = time.ParseDuration("180s")
		}
		bot.Client.Timeout = dur

		bot.State.MaxMessageCount = 100000
		bot.State.TrackChannels = true
		bot.State.TrackThreads = true
		bot.State.TrackMembers = true
		bot.State.TrackThreadMembers = true

		botUser, err = bot.User("@me")
		if err != nil {
			botUser = bot.State.User
		}
	}

	discord_login_count := 0
do_discord_login:
	discord_login_count++
	if discord_login_count > 1 {
		time.Sleep(3 * time.Second)
	}

	if config.Credentials.Token != "" && config.Credentials.Token != placeholderToken {
		// Login via Token (Bot or User)
		log.Println(lg("Discord", "", color.GreenString, "Connecting to Discord via Token..."))
		// attempt login without Bot prefix
		bot, err = discordgo.New(config.Credentials.Token)
		connectBot()
		if botUser.Bot { // is bot application, reconnect properly
			//log.Println(lg("Discord", "", color.GreenString, "Reconnecting as bot..."))
			bot, err = discordgo.New("Bot " + config.Credentials.Token)
		}

	} else if (config.Credentials.Email != "" && config.Credentials.Email != placeholderEmail) &&
		(config.Credentials.Password != "" && config.Credentials.Password != placeholderPassword) {
		// Login via Email+Password (User Only obviously)
		log.Println(lg("Discord", "", color.GreenString, "Connecting via Login..."))
		bot, err = discordgo.New(config.Credentials.Email, config.Credentials.Password)
	} else {
		if discord_login_count > 5 {
			log.Println(lg("Discord", "", color.HiRedString, "No valid credentials for Discord..."))
			properExit()
		} else {
			goto do_discord_login
		}
	}
	if err != nil {
		if discord_login_count > 5 {
			log.Println(lg("Discord", "", color.HiRedString, "Error logging in: %s", err))
			properExit()
		} else {
			goto do_discord_login
		}
	}

	connectBot()

	// Fetch Bot's User Info
	botUser, err = bot.User("@me")
	if err != nil {
		botUser = bot.State.User
		if botUser == nil {
			if discord_login_count > 5 {
				log.Println(lg("Discord", "", color.HiRedString, "Error obtaining user details: %s", err))
				properExit()
			} else {
				goto do_discord_login
			}
		}
	} else if botUser == nil {
		if discord_login_count > 5 {
			log.Println(lg("Discord", "", color.HiRedString, "No error encountered obtaining user details, but it's empty..."))
			properExit()
		} else {
			goto do_discord_login
		}
	} else {
		botReady = true
		log.Println(lg("Discord", "", color.HiGreenString, "Logged into %s", getUserIdentifier(*botUser)))
		if botUser.Bot {
			log.Println(lg("Discord", "Info", color.MagentaString, "This is a genuine Discord Bot Application"))
			log.Println(lg("Discord", "Info", color.MagentaString, "~ Presence details & state are disabled, only activity label will work."))
			log.Println(lg("Discord", "Info", color.MagentaString, "~ The bot can only see servers you have added it to. Usually you need to be admin or know an admin."))
			log.Println(lg("Discord", "Info", color.MagentaString, "~ Nothing is wrong, this is just info :)"))
		} else {
			log.Println(lg("Discord", "Info", color.MagentaString, "This is a User Account (Self-Bot)"))
			log.Println(lg("Discord", "Info", color.MagentaString, "~ Discord does not allow Automated User Accounts (Self-Bots), so by using this bot you potentially risk account termination."))
			log.Println(lg("Discord", "Info", color.MagentaString, "~ See GitHub page for link to Discord's official statement."))
			log.Println(lg("Discord", "Info", color.MagentaString, "~ If you wish to avoid this, use a Bot Application if possible."))
			log.Println(lg("Discord", "Info", color.MagentaString, "~ But since you're using a self-bot, you can download from any channels this account can access."))
			log.Println(lg("Discord", "Info", color.MagentaString, "~ Nothing is wrong, this is just info :)"))
		}
	}
	if bot.State.User != nil { // is selfbot
		selfbot = bot.State.User.Email != ""
	}

	// Event Handlers
	botCommands = handleCommands()
	bot.AddHandler(messageCreate)
	bot.AddHandler(messageUpdate)

	// Start Presence
	timeLastUpdated = time.Now()
	go updateDiscordPresence()

	//(SV) Source Validation
	if config.Debug {
		log.Println(lg("Discord", "Validation", color.HiYellowString, "Validating configured sources..."))
	}
	//(SV) Check Admin Channels
	if config.AdminChannels != nil {
		for _, adminChannel := range config.AdminChannels {
			if adminChannel.ChannelIDs != nil {
				for _, subchannel := range *adminChannel.ChannelIDs {
					_, err := bot.State.Channel(subchannel)
					if err != nil {
						invalidAdminChannels = append(invalidAdminChannels, subchannel)
						log.Println(lg("Discord", "Validation", color.HiRedString,
							"Bot cannot access admin subchannel %s...\t%s", subchannel, err))
					}
				}

			} else {
				_, err := bot.State.Channel(adminChannel.ChannelID)
				if err != nil {
					invalidAdminChannels = append(invalidAdminChannels, adminChannel.ChannelID)
					log.Println(lg("Discord", "Validation", color.HiRedString,
						"Bot cannot access admin channel %s...\t%s", adminChannel.ChannelID, err))
				}
			}
		}
	}
	//(SV) Check Sources
	for _, server := range config.Servers {
		if server.ServerIDs != nil {
			for _, subserver := range *server.ServerIDs {
				_, err := bot.State.Guild(subserver)
				if err != nil {
					invalidServers = append(invalidServers, subserver)
					log.Println(lg("Discord", "Validation", color.HiRedString,
						"Bot cannot access subserver %s...\t%s", subserver, err))
				}
			}
		} else {
			_, err := bot.State.Guild(server.ServerID)
			if err != nil {
				invalidServers = append(invalidServers, server.ServerID)
				log.Println(lg("Discord", "Validation", color.HiRedString,
					"Bot cannot access server %s...\t%s", server.ServerID, err))
			}
		}
	}
	for _, category := range config.Categories {
		if category.CategoryIDs != nil {
			for _, subcategory := range *category.CategoryIDs {
				_, err := bot.State.Channel(subcategory)
				if err != nil {
					invalidCategories = append(invalidCategories, subcategory)
					log.Println(lg("Discord", "Validation", color.HiRedString,
						"Bot cannot access subcategory %s...\t%s", subcategory, err))
				}
			}

		} else {
			_, err := bot.State.Channel(category.CategoryID)
			if err != nil {
				invalidCategories = append(invalidCategories, category.CategoryID)
				log.Println(lg("Discord", "Validation", color.HiRedString,
					"Bot cannot access category %s...\t%s", category.CategoryID, err))
			}
		}
	}
	for _, channel := range config.Channels {
		if channel.ChannelIDs != nil {
			for _, subchannel := range *channel.ChannelIDs {
				_, err := bot.State.Channel(subchannel)
				if err != nil {
					invalidChannels = append(invalidChannels, subchannel)
					log.Println(lg("Discord", "Validation", color.HiRedString,
						"Bot cannot access subchannel %s...\t%s", subchannel, err))
				}
			}

		} else {
			_, err := bot.State.Channel(channel.ChannelID)
			if err != nil {
				invalidChannels = append(invalidChannels, channel.ChannelID)
				log.Println(lg("Discord", "Validation", color.HiRedString,
					"Bot cannot access channel %s...\t%s", channel.ChannelID, err))
			}
		}
	}
	//(SV) Output
	invalidSources := len(invalidAdminChannels) + len(invalidChannels) + len(invalidCategories) + len(invalidServers)
	if invalidSources > 0 {
		log.Println(lg("Discord", "Validation", color.HiRedString,
			"Found %d invalid channels/servers in configuration...", invalidSources))
		logMsg := fmt.Sprintf("Validation found %d invalid sources...\n", invalidSources)
		if len(invalidAdminChannels) > 0 {
			logMsg += fmt.Sprintf("\n**- Admin Channels: (%d)** - %s",
				len(invalidAdminChannels), strings.Join(invalidAdminChannels, ", "))
		}
		if len(invalidServers) > 0 {
			logMsg += fmt.Sprintf("\n**- Download Servers: (%d)** - %s",
				len(invalidServers), strings.Join(invalidServers, ", "))
		}
		if len(invalidCategories) > 0 {
			logMsg += fmt.Sprintf("\n**- Download Categories: (%d)** - %s",
				len(invalidCategories), strings.Join(invalidCategories, ", "))
		}
		if len(invalidChannels) > 0 {
			logMsg += fmt.Sprintf("\n**- Download Channels: (%d)** - %s",
				len(invalidChannels), strings.Join(invalidChannels, ", "))
		}
		sendErrorMessage(logMsg)
	} else if config.Debug {
		log.Println(lg("Discord", "Validation", color.HiGreenString, "All sources successfully validated!"))
	}

	mainWg.Done()
}