package main

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

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

func ListenMe(c *tdlib.Client) {
	eventFilter := func(msg *tdlib.TdMessage) bool {
		updateMsg := (*msg).(*tdlib.UpdateNewMessage)
		senderUserID := updateMsg.Message.SenderUserID
		if senderUserID == ownUserID32 {
			return true
		} else {
			return false
		}
	}

	receiver := c.AddEventReceiver(&tdlib.UpdateNewMessage{}, eventFilter, 100)
	for _ = range receiver.Chan {
		lastOwnTDMsg = time.Now()
		log.Printf("ListenMe : lastOwnTDMsg updated.\n")
	}
}

func ListenMQ(c *tdlib.Client, msgs <-chan TGCommand) {
	for m := range msgs {
		for now := time.Now(); lastOwnTDMsg.Add(time.Second).After(now); {
			log.Printf("ListenMQ : channel busy, waiting before acting...\n")
			time.Sleep(time.Until(lastOwnTDMsg.Add(time.Second)))
			now = time.Now()
		}
		b, _ := json.Marshal(m)
		log.Printf("****************************** New MQ message ******************************\n%s\n****************************************************************************\n", string(b))
		switch m.Type {
		case commandSendMsg:
			msgTxt := tdlib.NewInputMessageText(tdlib.NewFormattedText(m.Text, nil), true, true)
			if m.ToChatID64 != 0 {
				c.SendMessage(m.ToChatID64, 0, false, false, nil, msgTxt)
			} else if m.ToUserID64 != 0 {
				c.SendMessage(m.ToUserID64, 0, false, false, nil, msgTxt)
			}
		case commandRefreshMsg:
			u, err := c.GetMessage(m.FromChatID64, m.FromMsgID64)
			logOnError(err, "ListenMQ : commandRefreshMsg")
			log.Printf("ListenMQ : commandRefreshMsg (%d - %d)\n", m.FromChatID64, m.FromMsgID64)
			if err != nil && u.Content.GetMessageContentEnum() == tdlib.MessageTextType {
				txt := u.Content.(*tdlib.MessageText).Text.Text

				r := ChatWarsMessage{
					UserID64:       ownUserID64,
					SenderUserID64: int64(u.SenderUserID),
					ID64:           u.ID,
					ChatID64:       u.ChatID,
					Text:           txt,
				}

				r.Date = time.Unix(int64(u.Date), 0)

				MQCWMsgQueue <- r
			}
		default:
			log.Printf("ListenMQ : No handler for command %d.\n", m.Type)
		}
	}
}

func ListenCW(c *tdlib.Client) {
	eventFilter := func(msg *tdlib.TdMessage) bool {
		updateMsg := (*msg).(*tdlib.UpdateNewMessage)
		chatID := updateMsg.Message.ChatID
		forwardInfo := updateMsg.Message.ForwardInfo
		if (chatID == user_chtwrsbot ||
			(chatID == chat_war && cfg.Listen.War) ||
			(chatID == chat_war_mini && cfg.Listen.WarMini) ||
			(chatID == chat_auction && cfg.Listen.Auctions)) &&
			forwardInfo == nil {
			return true
		} else {
			return false
		}
	}

	receiver := c.AddEventReceiver(&tdlib.UpdateNewMessage{}, eventFilter, 100)
	for newMsg := range receiver.Chan {
		updateMsg := (newMsg).(*tdlib.UpdateNewMessage)
		if updateMsg.Message.Content.GetMessageContentEnum() == tdlib.MessageTextType {
			txt := updateMsg.Message.Content.(*tdlib.MessageText).Text.Text
			t := time.Now()

			m := ChatWarsMessage{
				UserID64:       ownUserID64,
				SenderUserID64: int64(updateMsg.Message.SenderUserID),
				ID64:           updateMsg.Message.ID,
				ChatID64:       updateMsg.Message.ChatID,
				Text:           txt,
			}

			m.Date = time.Unix(int64(updateMsg.Message.Date), 0)

			MQCWMsgQueue <- m

			fmt.Printf("[%d-%02d-%02d %02d:%02d:%02d-00:00]", t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
			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("ForwardInfo : ", updateMsg.Message.ForwardInfo)
			fmt.Println("================================================================================================================")

		}
	}
}

func getHistory(c *tdlib.Client, chatID64 *int64, senderUserID64 *int64) {
	var msgCount int32 = 0
	var msgParsed int32 = 0
	var loopOverflow int32 = 0
	var lastParsedID64 int64 = int64(math.MaxInt64)
	var lastParsedTime time.Time = time.Now()
	var chat int64
	var m ChatWarsMessage

	if *chatID64 == 0 {
		chat = user_chtwrsbot
	} else {
		chat = *chatID64
	}

	if *senderUserID64 != 0 {
		userDetails, err := c.GetUser(int32(*senderUserID64))
		failOnError(err, "getHistory : GetUser")
		chatDetails, err := c.GetChat(chat)
		failOnError(err, "getHistory : GetChat")
		fmt.Printf("Exporting historic messages for chat %d (%s) from user %d (%s)...\n", chat, chatDetails.Title, *senderUserID64, userDetails.Username)
	} else {
		chatDetails, err := c.GetChat(chat)
		failOnError(err, "getHistory : GetChat")
		fmt.Printf("Exporting historic messages for chat %d (%s) ...\n", chat, chatDetails.Title)
	}

	for lastParsedID64 >= 0 {
		prevLastParsedID64 := lastParsedID64
		msgs, err := c.GetChatHistory(chat, lastParsedID64, 0, 99, false)
		if err != nil {
			if err.Error() == "timeout" {
				logOnError(err, "Waiting....")
				fmt.Printf("Timeout  : %d messages retrieved out of %d dating back %s (%d) ...\n", msgCount, msgParsed, lastParsedTime.Format(time.RFC3339), lastParsedID64)
				time.Sleep(5 * time.Second)
			} else {
				logOnError(err, "Cannot get history")
				lastParsedID64 = -1
			}
		} else if msgs.TotalCount > 0 {
			for _, msg := range msgs.Messages {
				msgParsed = msgParsed + 1
				lastParsedTime = time.Unix(int64(msg.Date), 0)
				switch msg.Content.GetMessageContentEnum() {
				case tdlib.MessageTextType:
					if msg.ForwardInfo == nil {
						m = ChatWarsMessage{
							UserID64:       ownUserID64,
							SenderUserID64: int64(msg.SenderUserID),
							ID64:           msg.ID,
							ChatID64:       msg.ChatID,
							Text:           msg.Content.(*tdlib.MessageText).Text.Text,
						}
						m.Date = time.Unix(int64(msg.Date), 0)
					} else {
						if msg.ForwardInfo.GetMessageForwardInfoEnum() == tdlib.MessageForwardedFromUserType {
							m = ChatWarsMessage{
								UserID64:       int64(msg.SenderUserID),
								SenderUserID64: int64(msg.ForwardInfo.(*tdlib.MessageForwardedFromUser).SenderUserID),
								ID64:           msg.ID,
								ChatID64:       0,
								Text:           msg.Content.(*tdlib.MessageText).Text.Text,
							}
							m.Date = time.Unix(int64(msg.ForwardInfo.(*tdlib.MessageForwardedFromUser).Date), 0)

						} else {
							m = ChatWarsMessage{
								ID64: 0,
							}
						}
					}

					if m.ID64 != 0 && (*senderUserID64 == 0 || m.SenderUserID64 == *senderUserID64) {
						MQCWMsgQueue <- m
						msgCount = msgCount + 1
					}
				default:
					log.Printf("getHistory(%d) : no handler for %s\n", msg.ID, msg.Content.GetMessageContentEnum())
				}
				if m.ID64 < lastParsedID64 {
					lastParsedID64 = msg.ID
					lastParsedTime = m.Date
				}
				if msgParsed%1000 == 0 {
					fmt.Printf("Waiting  : %d messages retrieved out of %d dating back %s (%d) ...\n", msgCount, msgParsed, lastParsedTime.Format(time.RFC3339), lastParsedID64)
				}

			}
		} else {
			lastParsedID64 = -1
		}
		if prevLastParsedID64 == lastParsedID64 {
			loopOverflow++
			if loopOverflow == 5 {
				// we should be at the end !
				lastParsedID64 = -1
			} else {
				logOnError(err, "Overflow ...")
				fmt.Printf("Overflow : %d messages retrieved out of %d dating back %s (%d) ...\n", msgCount, msgParsed, lastParsedTime.Format(time.RFC3339), lastParsedID64)
				time.Sleep(5 * time.Second)
			}
		} else {
			loopOverflow = 0
		}
	}
	log.Printf("Exported %d messages.\n", msgCount)
	fmt.Printf("Exported %d messages.\n", msgCount)
}

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
}