package kicker

import (
	"context"
	"fmt"
	"kickerbot/db"
	"log"
	"regexp"
	"strings"
	"time"

	"git.nefrace.ru/nefrace/tongo"
	"github.com/NicoNex/echotron/v3"
)

var Client *tongo.Database

type bot struct {
	chatID       int64
	CaptchaTopic int64
	Me           *echotron.User
	echotron.API
}

func (b *bot) Update(update *echotron.Update) {
	if update.Message != nil {
		if len(update.Message.NewChatMembers) != 0 {
			for _, user := range update.Message.NewChatMembers {
				if user.ID == b.Me.ID {
					botAdded(b, update)
				}
			}
			userJoined(b, update)
			return
		}
		if update.Message.LeftChatMember != nil {
			userLeft(b, update)
			return
		}
		if update.Message.Text != "" {
			if update.Message.Text == "/settopic" {
				setTopic(b, update)
				return
			}
			checkCaptcha(b, update)
		}
	}
}

// Базовая структура для бота
type Kicker struct {
	Token      string
	Dispatcher *echotron.Dispatcher
}

func (b *Kicker) NewBot(chatID int64) echotron.Bot {
	store := tongo.NewStore[db.Chat](Client)
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	chat, err := store.GetOne(ctx, tongo.E("chat_id", chatID))
	if err != nil {
		chat = &db.Chat{
			Item:    tongo.NewID(),
			ChatId:  chatID,
			Title:   "",
			TopicId: 0,
		}
		if _, err := store.InsertOne(ctx, chat); err != nil {
			return &bot{}
		}
	}
	CaptchaTopic := chat.TopicId
	result := &bot{
		chatID,
		CaptchaTopic,
		nil,
		echotron.NewAPI(b.Token),
	}
	log.Println("New bot created with CaptchaTopic", result.CaptchaTopic)
	me, err := result.GetMe()
	if err != nil {
		log.Println(err)
	}
	result.Me = me.Result

	return result
}

// Initialize bot with token
func (b *Kicker) Init() error {
	dsp := echotron.NewDispatcher(b.Token, b.NewBot)
	b.Dispatcher = dsp
	return nil
}

func (b *Kicker) Start() error {
	return b.Dispatcher.Poll()
}

func EscapeText(parseMode echotron.ParseMode, text string) string {
	var replacer *strings.Replacer

	if parseMode == echotron.HTML {
		replacer = strings.NewReplacer("<", "&lt;", ">", "&gt;", "&", "&amp;")
	} else if parseMode == echotron.Markdown {
		replacer = strings.NewReplacer("_", "\\_", "*", "\\*", "`", "\\`", "[", "\\[")
	} else if parseMode == echotron.MarkdownV2 {
		replacer = strings.NewReplacer(
			"_", "\\_", "*", "\\*", "[", "\\[", "]", "\\]", "(",
			"\\(", ")", "\\)", "~", "\\~", "`", "\\`", ">", "\\>",
			"#", "\\#", "+", "\\+", "-", "\\-", "=", "\\=", "|",
			"\\|", "{", "\\{", "}", "\\}", ".", "\\.", "!", "\\!",
		)
	} else {
		return ""
	}

	return replacer.Replace(text)
}

func waitAndDelete(b *echotron.API, message *echotron.Message, t time.Duration) {
	time.Sleep(t)
	if _, err := b.DeleteMessage(message.Chat.ID, message.ID); err != nil {
		log.Printf("Can't delay-delete message: %v", err)
	}
}

func MentionUser(user *echotron.User) string {
	return fmt.Sprintf("[%s](tg://user?id=%d)", EscapeText(echotron.MarkdownV2, user.FirstName), user.ID)
}

var chars = []string{"_", "\\*", "\\[", "\\]", "\\(", "\\)", "~", "`", ">", "#", "\\+", "\\-", "=", "|", "{", "}", "\\.", "!"}
var r = strings.Join(chars, "")
var reg = regexp.MustCompile("[" + r + "]+")

func EscapeMd2(s string) string {
	return reg.ReplaceAllString(s, "\\$0")
}

func Mention(name string, id int64) string {
	return fmt.Sprintf("[%s](tg://user?id=%d)", EscapeMd2(name), id)
}

func UserMention(u *echotron.User) string {
	return Mention(u.FirstName, u.ID)
}

func UserMentionDB(u *db.User) string {
	return Mention(u.FirstName, u.UserId)
}