package main

import (
	"encoding/json"
	"fmt"
	"log"
	"math"
	"sync"
	"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 {
		lastOwnTDMsgMux.Lock()
		lastOwnTDMsg = time.Now()
		lastOwnTDMsgMux.Unlock()
	}
}

func ListenMQ(c *tdlib.Client, msgs <-chan TGCommand) {
	for m := range msgs {
		//b, _ := json.Marshal(m)
		//log.Printf("****************************** New MQ command ******************************\n%s\n****************************************************************************\n", string(b))
		go clientMsg(c, m)
	}
}

func ListenTG(c *tdlib.Client) {
	eventFilter := func(msg *tdlib.TdMessage) bool {
		updateMsg := (*msg).(*tdlib.UpdateNewMessage)
		chatID := int64(updateMsg.Message.ChatID)
		userID := int64(updateMsg.Message.SenderUserID)
		forwardInfo := updateMsg.Message.ForwardInfo
		for _, v := range cfg.Listen {
			if (v.Chat == chatID || v.Chat == 0) &&
				(v.User == userID || v.User == 0) &&
				forwardInfo == nil {
				return true
			}
		}
		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{
				TGUserID64:       ownUserID64,
				TGSenderUserID64: int64(updateMsg.Message.SenderUserID),
				ID64:             updateMsg.Message.ID,
				ChatID64:         updateMsg.Message.ChatID,
				Text:             txt,
			}

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

			lastChatMsgMux.RLock()
			if _, ok := lastChatTDMsg[m.ChatID64]; !ok {
				lastChatMsgMux.RUnlock()
				lastChatMsgMux.Lock()
				if _, ok := lastChatTDMsg[m.ChatID64]; !ok {
					lastChatTDMsg[m.ChatID64] = time.Now().Add(-1 * time.Second)
					lastChatTDMsgMux[m.ChatID64] = new(sync.Mutex)
				}
				lastChatMsgMux.Unlock()
			} else {
				lastChatMsgMux.RUnlock()
			}
			for {
				lastChatTDMsgMux[m.ChatID64].Lock()
				now := time.Now()
				if lastChatTDMsg[m.ChatID64].Add(time.Second).Before(now) {
					lastChatTDMsg[m.ChatID64] = now
					lastChatTDMsgMux[m.ChatID64].Unlock()
					break
				}
				lastChatTDMsgMux[m.ChatID64].Unlock()
				time.Sleep(time.Until(now.Add(200 * time.Millisecond)))
			}

			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("================================================================================================================")

			b, err := json.Marshal(updateMsg)
			if err != nil {
				logOnError(err, "ListenTG : Marshaling message.")
			}

			fmt.Println("************ RAW TEXT MESSAGE FROM CHAT WARS ************")
			fmt.Println(string(b), "\n")
			fmt.Println("================================================================================================================")

		}
	}
}

func ListenTest(c *tdlib.Client) {
	eventFilter := func(msg *tdlib.TdMessage) bool {
		updateMsg := (*msg).(*tdlib.UpdateNewMessage)
		chatID := int64(updateMsg.Message.ChatID)
		userID := int64(updateMsg.Message.SenderUserID)
		forwardInfo := updateMsg.Message.ForwardInfo
		if chatID == 408101137 && userID == 408101137 && 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 {
			t := time.Now()

			b, err := json.Marshal(updateMsg)
			if err != nil {
				logOnError(err, "ListenTest : Marshaling message.")
			}

			fmt.Printf("[%d-%02d-%02d %02d:%02d:%02d-00:00]", t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
			fmt.Println("************ RAW NON TEXT MESSAGE FROM CHAT WARS ************")
			fmt.Println(string(b), "\n")
			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

	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{
							TGUserID64:       ownUserID64,
							TGSenderUserID64: 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{
								TGUserID64:       int64(msg.SenderUserID),
								TGSenderUserID64: 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.TGSenderUserID64 == *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 OwnUserID(c *tdlib.Client) int32 {
	user, _ := c.GetMe()
	return user.ID
}

func clientMsg(c *tdlib.Client, m TGCommand) {
	if m.Delay != time.Duration(0) {
		log.Printf("clientMsg : Delaying message by %.3f seconds.\n", m.Delay.Seconds())
		time.Sleep(m.Delay)
	}
	for {
		lastOwnTDMsgMux.Lock()
		now := time.Now()
		if lastOwnTDMsg.Add(time.Second).Before(now) {
			lastOwnTDMsg = now
			lastOwnTDMsgMux.Unlock()
			break
		}
		lastOwnTDMsgMux.Unlock()
		time.Sleep(time.Until(now.Add(time.Second)))
	}

	switch m.Type {
	case commandForwardMsg:
		msgIDs := make([]int64, 1)
		msgIDs[0] = m.FromMsgID64
		c.ForwardMessages(m.ToChatID64, m.FromChatID64, msgIDs, false, false, false)

	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 commandDeleteMsg:
		msgIDs := make([]int64, 1)
		msgIDs[0] = m.FromMsgID64
		c.DeleteMessages(m.FromChatID64, msgIDs, false)

	case commandRefreshMsg:
		u, err := c.GetMessage(m.FromChatID64, m.FromMsgID64)
		logOnError(err, "ListenMQ : commandRefreshMsg")
		if err == nil && u.Content.GetMessageContentEnum() == tdlib.MessageTextType {
			txt := u.Content.(*tdlib.MessageText).Text.Text

			r := ChatWarsMessage{
				TGUserID64:       ownUserID64,
				TGSenderUserID64: 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)
	}
}