<?php

namespace App\Telegram;

use App\Models\User;

/**
 * Request-scoped Telegram bot identity.
 * null agent = official system bot; otherwise an agent-configured bot.
 */
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', ''));
    }

    public static function webhookSecretFor(User $agent): string
    {
        return hash_hmac('sha256', 'telegram-agent:'.$agent->id, (string) config('app.key'));
    }
}