// Device authentication management for Epic Games
// Based on https://github.com/claabs/epicgames-freegames-node

import fs from 'node:fs';
import path from 'node:path';
import { dataDir } from './util.js';

const CONFIG_DIR = dataDir('config');
const deviceAuthsFilename = path.join(CONFIG_DIR, 'device-auths.json');

// Ensure config directory exists
if (!fs.existsSync(CONFIG_DIR)) {
  fs.mkdirSync(CONFIG_DIR, { recursive: true });
}

export async function getDeviceAuths() {
  try {
    const deviceAuths = JSON.parse(fs.readFileSync(deviceAuthsFilename, 'utf-8'));
    return deviceAuths;
  } catch {
    return undefined;
  }
}

export async function getAccountAuth(account) {
  const deviceAuths = await getDeviceAuths();
  return deviceAuths?.[account];
}

export async function writeDeviceAuths(deviceAuths) {
  fs.writeFileSync(deviceAuthsFilename, JSON.stringify(deviceAuths, null, 2));
}

export async function setAccountAuth(account, accountAuth) {
  const existingDeviceAuths = (await getDeviceAuths()) ?? {};
  existingDeviceAuths[account] = accountAuth;
  await writeDeviceAuths(existingDeviceAuths);
}