// Fantasy World Zookeeper Helper Bot
// Copyright (c) 2018 Vladimir "fat0troll" Hodakov

package telegram

import (
	"fmt"
	tdlib "github.com/Arman92/go-tdlib"
	"lab.wtfteam.pro/fat0troll/fw_zookeeper_helper/context"
	"strings"
)

// Authenticate connects instance to Telegram
// At first launch we need to login manually - there is no way to automate
// Telegram login
func Authenticate() {
	tdlib.SetLogVerbosityLevel(1)
	tdlib.SetFilePath(c.Config.TDLib.ErrorsFile)

	// Create new instance of client
	client = tdlib.NewClient(tdlib.Config{
		APIID:               c.Config.TDLib.APIID,
		APIHash:             c.Config.TDLib.APIHash,
		SystemLanguageCode:  "en",
		DeviceModel:         "fw_zookeeper_helper",
		SystemVersion:       context.VERSION,
		ApplicationVersion:  context.VERSION,
		UseMessageDatabase:  true,
		UseFileDatabase:     true,
		UseChatInfoDatabase: true,
		UseTestDataCenter:   false,
		DatabaseDirectory:   c.Config.TDLib.DatabaseDirectory,
		FileDirectory:       c.Config.TDLib.FilesDirectory,
		IgnoreFileNames:     false,
	})

	for {
		currentState, _ := client.Authorize()
		log.Info().Msg("Starting Telegram authorization...")
		if currentState.GetAuthorizationStateEnum() == tdlib.AuthorizationStateWaitPhoneNumberType {
			fmt.Print("Enter phone: ")
			var number string
			fmt.Scanln(&number)
			_, err := client.SendPhoneNumber(number)
			if err != nil {
				log.Error().Err(err).Msg("Error sending phone number")
			}
		} else if currentState.GetAuthorizationStateEnum() == tdlib.AuthorizationStateWaitCodeType {
			fmt.Print("Enter code: ")
			var code string
			fmt.Scanln(&code)
			_, err := client.SendAuthCode(code)
			if err != nil {
				log.Error().Err(err).Msg("Error sending auth code")
			}
		} else if currentState.GetAuthorizationStateEnum() == tdlib.AuthorizationStateWaitPasswordType {
			fmt.Print("Enter Password: ")
			var password string
			fmt.Scanln(&password)
			_, err := client.SendAuthPassword(password)
			if err != nil {
				log.Error().Err(err).Msg("Error sending auth password")
			}
		} else if currentState.GetAuthorizationStateEnum() == tdlib.AuthorizationStateReadyType {
			me, _ := client.GetMe()
			log.Info().Msgf("Logged into Telegram as @%s", me.Username)
			break
		}
	}
}

// Connect connects into updates chain
//
func Connect() {
	go func() {
		// Create an filter function which will be used to filter out unwanted tdlib messages
		eventFilter := func(msg *tdlib.TdMessage) bool {
			updateMsg := (*msg).(*tdlib.UpdateNewMessage)
			// We need only messages, created by @FWorldBot
			return updateMsg.Message.ViaBotUserID == 6.74929718e+08
		}

		// Here we can add a receiver to retreive any message type we want
		// We like to get UpdateNewMessage events and with a specific FilterFunc
		receiver := client.AddEventReceiver(&tdlib.UpdateNewMessage{}, eventFilter, 5)
		for newMsg := range receiver.Chan {
			updateMsg := (newMsg).(*tdlib.UpdateNewMessage)
			// Check if message text contains needed battle data
			msgText := updateMsg.Message.Content.(*tdlib.MessageText)
			if strings.HasPrefix(msgText.Text.Text, "Я встретил") {
				log.Debug().Msgf("%s", msgText.Text.Text)
				battleType := ""
				battleTag := ""
				if strings.Contains(msgText.Text.Text, "Огров") {
					battleType = "Огры!"
				}
				if strings.Contains(msgText.Text.Text, "Буйволов") {
					battleType = "Буйволы!"
				}
				if strings.Contains(msgText.Text.Text, "Кабанов") {
					battleType = "Кабаны!"
				}
				switch updateMsg.Message.ReplyMarkup.(type) {
				case *tdlib.ReplyMarkupInlineKeyboard:
					keyboard := updateMsg.Message.ReplyMarkup.(*tdlib.ReplyMarkupInlineKeyboard)
					if len(keyboard.Rows) > 0 {
						if len(keyboard.Rows[0]) > 0 {
							button := keyboard.Rows[0][0]
							switch button.Type.(type) {
							case *tdlib.InlineKeyboardButtonTypeSwitchInline:
								buttonQuery := button.Type.(*tdlib.InlineKeyboardButtonTypeSwitchInline)
								battleTag = string(buttonQuery.Query)
							default:
								log.Error().Msg("Invalid button type")
							}
						}
					}
				default:
					log.Error().Msg("Invalid keyboard type")
				}
				log.Debug().Msgf("Battle type: %s", battleType)
				log.Debug().Msgf("Battle tag: %s", battleTag)

				reply := tdlib.InputMessageText{
					DisableWebPagePreview: true,
					Text: &tdlib.FormattedText{
						Text: "Вызываю на помощь!",
					},
				}

				_, err := client.SendMessage(updateMsg.Message.ChatID, 0, false, false, nil, &reply)
				if err != nil {
					log.Error().Err(err)
				}
			}
		}

	}()

	rawUpdates := client.GetRawUpdatesChannel(100)
	for update := range rawUpdates {
		log.Debug().Msgf("Update of type %s received", update.Data["@type"])
	}
}