package moon

import (
	"fmt"
	"slices"

	"github.com/NicoNex/echotron/v3"
)

// newChatMember parses one of types ChatMemberUpdated event.
// https://core.telegram.org/bots/api#chatmemberupdated
func newChatMember(msg *echotron.Update) {
	Log.Infof(
		"User %s %s (username = %s, id = %d) in chat %s %s (%d) now %s was %s",
		msg.ChatMember.NewChatMember.User.FirstName,
		msg.ChatMember.NewChatMember.User.LastName,
		msg.ChatMember.NewChatMember.User.Username,
		msg.ChatMember.NewChatMember.User.ID,
		msg.ChatMember.Chat.Type,
		msg.ChatMember.Chat.Title,
		msg.ChatMember.Chat.ID,
		msg.ChatMember.NewChatMember.Status,
		msg.ChatMember.OldChatMember.Status,
	)

	// Keep list of chats updated.
	ChatList = append(ChatList, msg.ChatMember.Chat.ID)
	slices.Sort(ChatList)
	ChatList = slices.Compact(ChatList)

	Log.Info("Processing ChatMemberUpdated event")

	// Check some other attributes.
	if msg.ChatMember.OldChatMember.Status == "left" && msg.ChatMember.NewChatMember.Status == "member" {
		leftTimestampString := Cfg.GetValue(
			"LeftMembers",
			fmt.Sprintf("%d", msg.ChatMember.Chat.ID),
			fmt.Sprintf("%d", msg.ChatMember.NewChatMember.User.ID),
		)

		// Yes, this member definitely left chat at some point, we have no question to him/her.
		if leftTimestampString != "" {
			return
		}

		// Spam bots come with these attributes.
		// msg.ChatMember.NewChatMember.Status = "member"
		// msg.ChatMember.OldChatMember.User != nil
		// msg.ChatMember.OldChatMember.Status = "left"

		casBanned, err := CasCheckID(msg.ChatMember.NewChatMember.User.ID)

		if err != nil {
			Log.Error(err)
		}

		// Ban user if cas report it as banned.
		if casBanned {
			Log.Infof("Ban user %d in chat %d by CAS blacklist")
			squash(msg.Message.Chat.ID, msg.ChatMember.NewChatMember.User.ID)
		}

		AddAppearedMember(msg.ChatMember.Chat.ID, msg.ChatMember.NewChatMember.User.ID)
	}
}

/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */