<?php

namespace App\Telegram;

use App\Models\User;

/**
 * Request-scoped Telegram identity.
 * null agent = official owner chat; otherwise the agent whose chat_id matched.
 */
class TelegramBotContext
{
    private ?User $agent = null;

    public function setAgent(?User $agent): void
    {
        $this->agent = $agent;
    }

    public function agent(): ?User
    {
        return $this->agent;
    }

    public function isOfficial(): bool
    {
        return $this->agent === null;
    }

    public function isAgent(): bool
    {
        return $this->agent !== null;
    }

    public function expectedChatId(): string
    {
        if ($this->agent !== null) {
            return trim((string) ($this->agent->chat_id ?? ''));
        }

        return trim((string) config('coruna.telegram.owner_chat_id', ''));
    }

    /**
     * Bind official vs agent from the incoming chat_id.
     * Official owner_chat_id wins if it collides with an agent.
     */
    public function bindFromChatId(int|string|null $chatId): bool
    {
        $chatId = trim((string) $chatId);
        if ($chatId === '') {
            $this->agent = null;

            return false;
        }

        $owner = trim((string) config('coruna.telegram.owner_chat_id', ''));
        if ($owner !== '' && $chatId === $owner) {
            $this->agent = null;

            return true;
        }

        $agent = User::findEnabledByChatId($chatId);
        if ($agent === null) {
            $this->agent = null;

            return false;
        }

        $this->agent = $agent;

        return true;
    }
}