import { TelegramUser } from '../types/turnkey.js';
import { AuthDataValidator, objectToAuthDataMap } from '@telegram-auth/server';

const ONE_MINUTE_IN_SECONDS = 60;

export async function validateLogin(params: TelegramUser, botToken: string) {
  const validator = new AuthDataValidator({ botToken });
  try {
    // Check if auth_date is older than 1 minute
    const currentTimestamp = Math.floor(Date.now() / 1000);
    const authDate = Number(params.auth_date);

    if (currentTimestamp - authDate > ONE_MINUTE_IN_SECONDS) {
      return {
        success: false,
        error: 'Authentication data is expired (older than 1 minute)',
      };
    }

    const data = objectToAuthDataMap(params as unknown as Record<string, string | number>);
    const user = await validator.validate(data);

    if (user) {
      return {
        success: true,
        user: {
          ...user,
          hash: params.hash,
        },
      };
    } else {
      return {
        success: false,
        user: null,
      };
    }
  } catch (error) {
    return {
      success: false, // Changed to false since this is an error case
      error: error instanceof Error ? error.message : 'Unknown Error',
    };
  }
}