package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"log"
	"time"

	"gopkg.in/gcfg.v1"

	"github.com/Arman92/go-tdlib"
	"github.com/streadway/amqp"
)

type MsgDirection string

const (
	Incoming MsgDirection = `incoming`
	Outgoing MsgDirection = `outgoing`
)

type ChatWarsMessage struct {
	MsgID64   int64        `json:"msg_id"`
	UserID64  int64        `json:"user_id"`
	Direction MsgDirection `json:"direction"`
	MsgText   string       `json:"msg"`
	MsgDate   int32        `json:"date"`
}

const user_chtwrsbot = 408101137

type Config struct {
	Rabbit struct {
		User     string
		Password string
		Host     string
		Queue    string
	}
}

var (
	config = flag.String("config", "gocw2.cfg", "config file path")
	initdb = flag.Bool("initdb", false, "initialize tracker database")

	cfg Config

	ownUserID64 = int64(0)
	ownUserID32 = int32(0)
)

func main() {
	// Parsing config
	flag.Parse()

	err := gcfg.ReadFileInto(&cfg, *config)
	if err != nil {
		log.Fatalf("Failed to parse gcfg data: %s", err)
	}

	tdlib.SetLogVerbosityLevel(1)
	tdlib.SetFilePath("./errors.txt")

	// Create new instance of client
	client := tdlib.NewClient(tdlib.Config{
		APIID:               "187786",
		APIHash:             "e782045df67ba48e441ccb105da8fc85",
		SystemLanguageCode:  "en",
		DeviceModel:         "ChatWarsClient",
		SystemVersion:       "0.1",
		ApplicationVersion:  "0.1",
		UseMessageDatabase:  true,
		UseFileDatabase:     true,
		UseChatInfoDatabase: true,
		UseTestDataCenter:   false,
		DatabaseDirectory:   "./tdlib-db",
		FileDirectory:       "./tdlib-files",
		IgnoreFileNames:     false,
	})

	for {
		currentState, _ := client.Authorize()
		if currentState.GetAuthorizationStateEnum() == tdlib.AuthorizationStateWaitPhoneNumberType {
			fmt.Print("Enter phone: ")
			var number string
			fmt.Scanln(&number)
			_, err := client.SendPhoneNumber(number)
			if err != nil {
				fmt.Printf("Error sending phone number: %v", err)
			}
		} else if currentState.GetAuthorizationStateEnum() == tdlib.AuthorizationStateWaitCodeType {
			fmt.Print("Enter code: ")
			var code string
			fmt.Scanln(&code)
			_, err := client.SendAuthCode(code)
			if err != nil {
				fmt.Printf("Error sending auth code : %v", err)
			}
		} else if currentState.GetAuthorizationStateEnum() == tdlib.AuthorizationStateWaitPasswordType {
			fmt.Print("Enter Password: ")
			var password string
			fmt.Scanln(&password)
			_, err := client.SendAuthPassword(password)
			if err != nil {
				fmt.Printf("Error sending auth password: %v", err)
			}
		} else if currentState.GetAuthorizationStateEnum() == tdlib.AuthorizationStateReadyType {
			fmt.Println("Authorization Ready! Let's rock")
			break
		}
	}

	ownUserID32 = OwnUserID(client)
	ownUserID64 = int64(OwnUserID(client))

	go ListenCW(client)

	fmt.Println("Started !")

	// Main loop
	for {
		time.Sleep(30 * time.Second)
	}

}

func ListenCW(c *tdlib.Client) {
	eventFilter := func(msg *tdlib.TdMessage) bool {
		updateMsg := (*msg).(*tdlib.UpdateNewMessage)
		chatID := updateMsg.Message.ChatID
		if chatID == user_chtwrsbot {
			return true
		}
		return false
	}

	conn, err := amqp.Dial("amqp://" + cfg.Rabbit.User + ":" + cfg.Rabbit.Password + "@" + cfg.Rabbit.Host + "/" + cfg.Rabbit.Queue)
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()

	ch, err := conn.Channel()
	if err != nil {
		log.Fatal(err)
	}
	defer ch.Close()

	q, err := ch.QueueDeclare(
		"msg", // name
		false, // durable
		false, // delete when unused
		false, // exclusive
		false, // no-wait
		nil,   // arguments
	)
	if err != nil {
		log.Fatal(err)
	}

	receiver := c.AddEventReceiver(&tdlib.UpdateNewMessage{}, eventFilter, 100)
	for newMsg := range receiver.Chan {
		updateMsg := (newMsg).(*tdlib.UpdateNewMessage)
		senderUserID := updateMsg.Message.SenderUserID
		mType := updateMsg.Message.Content.GetMessageContentEnum()
		if mType == "messageText" {
			user, err := c.GetUser(senderUserID)
			if err != nil {
				fmt.Println("ListenCW:", err.Error())
				continue
			}

			txt := updateMsg.Message.Content.(*tdlib.MessageText).Text.Text
			t := time.Now()

			m := ChatWarsMessage{
				UserID64: ownUserID64,
				MsgDate:  updateMsg.Message.Date,
				MsgText:  string(txt),
				MsgID64:  updateMsg.Message.ID,
			}
			if senderUserID == ownUserID32 {
				m.Direction = Outgoing
			} else {
				m.Direction = Incoming
			}

			b, err := json.Marshal(m)

			_ = ch.Publish(
				"",     // exchange
				q.Name, // routing key
				false,  // mandatory
				false,  // immediate
				amqp.Publishing{
					ContentType: "application/json",
					Body:        []byte(b),
				})

			fmt.Printf("[%d-%02d-%02d %02d:%02d:%02d-00:00]", t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
			fmt.Println(" === CHATWARS (", user.Username, ") =====================================================================")
			fmt.Println(txt, "\n")
			fmt.Println("************ DETAILS ************")
			fmt.Println("ID : ", updateMsg.Message.ID)
			fmt.Println("Date : ", updateMsg.Message.Date)
			fmt.Println("SenderUserID : ", updateMsg.Message.SenderUserID)
			fmt.Println("ChatID : ", updateMsg.Message.ChatID)
			fmt.Println("SendingState : ", updateMsg.Message.SendingState)
			fmt.Println("IsOutgoing : ", updateMsg.Message.IsOutgoing)
			fmt.Println("CanBeEdited : ", updateMsg.Message.CanBeEdited)
			fmt.Println("CanBeForwarded : ", updateMsg.Message.CanBeForwarded)
			fmt.Println("IsChannelPost : ", updateMsg.Message.IsChannelPost)
			fmt.Println("ContainsUnreadMention : ", updateMsg.Message.ContainsUnreadMention)
			fmt.Println("ForwardInfo : ", updateMsg.Message.ForwardInfo)
			fmt.Println("ReplyToMessageID : ", updateMsg.Message.ReplyToMessageID)
			fmt.Println("ViaBotUserID : ", updateMsg.Message.ViaBotUserID)
			fmt.Println("================================================================================================================")

		}
	}
}

func ForwardMsg(c *tdlib.Client, msgID int64, fromChatID int64, toChatID int64) int64 {
	msgIDs := make([]int64, 1)
	msgIDs[0] = msgID
	msgs, _ := c.ForwardMessages(toChatID, fromChatID, msgIDs, false, false, false)
	if msgs != nil {
		return msgs.Messages[0].ID
	} else {
		return 0
	}
}

func DeleteMsg(c *tdlib.Client, chatID int64, msgID int64) {
	msgIDs := make([]int64, 1)
	msgIDs[0] = msgID
	c.DeleteMessages(chatID, msgIDs, false)
	fmt.Println("Deleting message ", msgID)
}

func OwnUserID(c *tdlib.Client) int32 {
	user, _ := c.GetMe()
	return user.ID
}