package handlers

import (
	"sync"

	config "git.zio.sh/astra/telegram-approval-join/config"
	api "github.com/OvyFlash/telegram-bot-api"
)

const (
	AdminJoinRequestMsg = "New join #request from %s [<code>%d</code>]\n\n<b>Join reason</b>: %s"
	AdminApprovedMsg    = "✅ Join #request approved for %s [<code>%d</code>]\n\n<b>Join reason</b>: %s\n<b>Approved by</b>: %s\n<b>Approved at</b>: %s"
	AdminDeclinedMsg    = "❌ Join #request declined for %s [<code>%d</code>]\n\n<b>Join reason</b>: %s\n<b>Declined by</b>: %s\n<b>Declined at</b>: %s\n<b>Declined reason</b>: %s"
	AdminFailedMsg      = "⚠️ Join #request failed for %s [<code>%d</code>]\n\n<b>Join reason</b>: %s\n<b>Failure reason</b>: %s"
	BotApprovalEnabled  = "Join approval bot enabled, to get started, add the bot to the target group and make it an admin with invite permissions, then use <code>/targetchat &lt;chat_id&gt;</code> to add the group to the config.\n\nTo set the entry message that users will receive when they request to join, use <code>/setentrymessage &lt;entry_message&gt;</code> in the admin chat. You can use HTML formatting in the entry message."
	BotAddedToGroup     = "Hello! I help out with join approvals.\n\nTo get started, make sure this bot is added to the admin group where it will send join approvals to be accepted or declined, then type /request when you have done that."
	BotRequestMsg       = "You have requested this chat to be the admin chat, please wait for it to be activated."
)

// Types shared by handler files
type ExtendedChatJoinRequest struct {
	*api.ChatJoinRequest
	JoinReason           string
	JoinRequestMessageID int
}

type Bot struct {
	API                *api.BotAPI
	Config             config.Config
	mu                 sync.RWMutex
	WaitingForApproval map[int64]*ExtendedChatJoinRequest
}

// GetPendingUser retrieves a pending user request (read-safe).
func (bot *Bot) GetPendingUser(userID int64) *ExtendedChatJoinRequest {
	bot.mu.RLock()
	defer bot.mu.RUnlock()
	user := bot.WaitingForApproval[userID]
	if user == nil {
		return nil
	}
	return user
}

// SetPendingUser stores a pending user request (write-safe).
func (bot *Bot) SetPendingUser(userID int64, user *ExtendedChatJoinRequest) {
	bot.mu.Lock()
	defer bot.mu.Unlock()
	if _, ok := bot.WaitingForApproval[userID]; !ok {
		bot.WaitingForApproval = make(map[int64]*ExtendedChatJoinRequest)
	}
	bot.WaitingForApproval[userID] = user
}

// DeletePendingUser removes a pending user request (write-safe).
func (bot *Bot) DeletePendingUser(userID int64) {
	bot.mu.Lock()
	defer bot.mu.Unlock()
	delete(bot.WaitingForApproval, userID)
}