#!/usr/bin/env node
/**
 * VIU Premium Account Wrapper (viu.interflazz.my.id)
 * Node.js ESM — output JSON pretty print
 *
 * Usage:
 *   node viu.js
 *   node viu.js --device-id=abc123
 *   DEVICE_ID=abc123 node viu.js
 */

import { createHash, randomBytes } from 'node:crypto';
import { parseArgs } from 'node:util';

const BASE_URL = 'https://viu.interflazz.my.id/?action=account';

const DEFAULT_HEADERS = {
  'User-Agent':
    'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36',
  Accept: 'application/json',
  'Content-Type': 'application/json',
  Origin: 'https://viu.interflazz.my.id',
  Referer: 'https://viu.interflazz.my.id/',
};

/**
 * Generate device_id mirip fingerprint browser (32 hex chars)
 */
function generateDeviceId(seed = null) {
  if (seed) {
    return createHash('md5').update(String(seed)).digest('hex');
  }
  return randomBytes(16).toString('hex');
}

/**
 * Ambil akun VIU berdasarkan device_id
 * @param {string} deviceId
 * @returns {Promise<object>}
 */
export async function getViuAccount(deviceId) {
  const res = await fetch(BASE_URL, {
    method: 'POST',
    headers: DEFAULT_HEADERS,
    body: JSON.stringify({ device_id: deviceId }),
  });

  if (!res.ok) {
    throw new Error(`HTTP ${res.status}: ${res.statusText}`);
  }

  const data = await res.json();

  if (!data.success) {
    throw new Error(data.message || 'Gagal mengambil akun');
  }

  return {
    success: data.success,
    message: data.message,
    is_new: data.is_new,
    device_id: data.device_id,
    account: {
      email: data.account?.email ?? null,
      password: data.account?.password ?? null,
    },
    fetched_at: new Date().toISOString(),
  };
}

// CLI
async function main() {
  const { values } = parseArgs({
    options: {
      'device-id': { type: 'string', short: 'd' },
      help: { type: 'boolean', short: 'h' },
    },
    allowPositionals: false,
  });

  if (values.help) {
    console.log(`
Usage:
  node viu.js
  node viu.js --device-id <id>
  node viu.js -d <id>

Env:
  DEVICE_ID=...   (prioritas lebih rendah dari --device-id)
`);
    process.exit(0);
  }

  const deviceId =
    values['device-id'] ||
    process.env.DEVICE_ID ||
    generateDeviceId();

  try {
    const result = await getViuAccount(deviceId);
    console.log(JSON.stringify(result, null, 2));
  } catch (err) {
    console.error(
      JSON.stringify(
        {
          success: false,
          error: err.message,
          device_id: deviceId,
        },
        null,
        2
      )
    );
    process.exit(1);
  }
}

// Jalankan hanya jika file ini dieksekusi langsung
const isMain =
  process.argv[1] &&
  (import.meta.url.endsWith(process.argv[1].replace(/\\/g, '/')) ||
    process.argv[1].endsWith('viu.js'));

if (isMain) {
  main();
}