package query

import (
	"fmt"
	"log/slog"
	"strconv"
	"strings"
	"sync"
	"time"

	"git.maximotejeda.com/maximo/cedulados-bot/internal/application/auth"
	"git.maximotejeda.com/maximo/cedulados-bot/internal/ports"
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
)

var ChatPool *sync.Pool

type Query struct {
	bot    *tgbotapi.BotAPI
	update *tgbotapi.Update
	msg    *tgbotapi.MessageConfig
	delMSG *tgbotapi.DeleteMessageConfig
	log    *slog.Logger
	ce      ports.CeduladosService
	uSVC    ports.UserService
}

// NewMessage
// Factory for query handler
func NewQuery(bot *tgbotapi.BotAPI, update *tgbotapi.Update, cSVC ports.CeduladosService, user ports.UserService) *Query {
	if ChatPool == nil {
		ChatPool = &sync.Pool{
			New: func() any { return &Query{} },
		}
		for i := 0; i < 20; i++ {
			ChatPool.Put(ChatPool.New())
		}
	}
	log := slog.Default()
	log = log.With("function", "Query", "chat", update.CallbackQuery.From.ID, "userid", update.CallbackQuery.From.ID, "username", update.CallbackQuery.From.UserName)
	query := ChatPool.Get().(*Query)
	query.update = update
	query.bot = bot
	query.log = log
	query.ce = cSVC
	query.uSVC = user
	return query
}

// Empty
// Returns pointer to pool
func (q *Query) Empty() {
	q.update = nil
	q.msg = nil
	q.log = nil
	q.ce = nil
	q.uSVC = nil
	ChatPool.Put(q)
}

// Send
// Process message sending to bot
func (q *Query) Send() {
	defer q.Empty()
	q.bot.Send(q.msg)
	if q.delMSG != nil {
		q.bot.Send(q.delMSG)
	}
}

func (q *Query) Handler(){
	msg := tgbotapi.NewMessage(q.update.CallbackQuery.From.ID, "")
	delMSG := tgbotapi.NewDeleteMessage(q.update.CallbackQuery.From.ID, q.update.CallbackQuery.Message.MessageID)
	text := ""
	q.msg = &msg
	q.delMSG = &delMSG
	data := q.update.CallbackQuery.Data
	dataList := strings.Split(data, "&")
	dataMap := map[string]string{}
	for _, val := range dataList{
		subData := strings.Split(val, "=")
		dataMap[subData[0]] = subData[1]
	}
	userSTR := dataMap["userID"]
	userID, err := strconv.ParseInt(userSTR, 10, 64)
	if err != nil {
		text = fmt.Sprintf("could not parse int %s", userSTR)
		q.log.Error("could not parse id", "userID", userSTR)
		return
	}
	switch dataMap["operation"]{
	case "grant":
		// grant user access to a bot
		if !auth.IsUserAdmin(q.update.CallbackQuery.From.ID){
			text = "only admin can execute this command"
		}else{
			q.log.Info("inside grant")
			_, err := q.uSVC.GrantAccess(userID, dataMap["bot"])
			if err != nil {
				q.log.Error("granting access to bot", "user", userID, "bot", dataMap["bot"])
				text = fmt.Sprintf("ERROR: grant user access: %s", err)
			}else {
				text = fmt.Sprintf("granted access to user %s to bot %s", userSTR, dataMap["bot"])
				go func (){
					userMsg := tgbotapi.NewMessage(userID, "Granted access permissions!!")
					q.bot.Send(userMsg)
				}()
			}
		}
	case "deny":
		if !auth.IsUserAdmin(q.update.CallbackQuery.From.ID){
			text = "only admin can execute this command"
		}else{
	// deny user access to a bot
			_, err := q.uSVC.BanUser(userID, time.Now().Add(24 * 365 * time.Hour).Unix(), dataMap["bot"])
			if err != nil {
				q.log.Error("baning user", "user", userID, "bot", dataMap["bot"])
				text = fmt.Sprintf("ERROR: banning user: %s", err)
			}else {
				text = fmt.Sprintf("user banned user: %s, bot: %s", userSTR, dataMap["bot"])
			}

		}
	case "ignore":
		text = fmt.Sprintf("user request ignored user: %s", userSTR)
	// ignore user access request
	case "ban":
		if !auth.IsUserAdmin(q.update.CallbackQuery.From.ID){
			text = "only admin can execute this command"
		}else{
			_, err := q.uSVC.BanUser(userID, time.Now().Add(24 * 365 * time.Hour).Unix(), dataMap["bot"])
			if err != nil {
				q.log.Error("baning user", "user", userID, "bot", dataMap["bot"])
				text = fmt.Sprintf("ERROR: banning user: %s", err)
			}else{
				text = fmt.Sprintf("baned user: %s, bot: %s", userSTR, dataMap["bot"]) 
			}
			// TODO: ext = fmt.Sprintf("user banned user: %s, bot: %s", userSTR, dataMap["bot"])
		}
	case "unban":
		if !auth.IsUserAdmin(q.update.CallbackQuery.From.ID){
			text = "only admin can execute this command"
		}else{
			_, err := q.uSVC.UnBanUser(userID, dataMap["bot"])
			if err != nil {
				q.log.Error("baning user", "user", userID, "bot", dataMap["bot"])
				text = fmt.Sprintf("ERROR: unbanning user: %s", err)
			}else {
				text = fmt.Sprintf("user banned user: %s, bot: %s", userSTR, dataMap["bot"])
			}	
		}
	case "delete":
		if !auth.IsUserAdmin(q.update.CallbackQuery.From.ID){
			text = "only admin can execute this command"
		}else{
			_, err := q.uSVC.DeleteBot(userID, q.bot.Self.UserName)
			if err != nil {
				q.log.Error("baning user", "user", userID, "bot", dataMap["bot"])
				text = fmt.Sprintf("ERROR: deleted user: %s from bot %s", err, q.bot.Self.UserName)
			}else {
				text = fmt.Sprintf("user deleted user: %s, bot: %s", userSTR, dataMap["bot"])
			}
		}
	}
	q.msg.Text = text
	q.Send()
}