/**
 * Password Hash Injector for Weight Tracker
 * 
 * This script injects the password hash from environment variables
 * into the HTML file before it's served to the client.
 */

const fs = require('fs');
const path = require('path');

// Default password hash (can be overridden via environment variables)
const DEFAULT_HASH = '$2a$10$EgxHKjDDFcZKtQY9hl/N4.QvEQHCXVnQXw9dzFYlUDVKOcLMGp9eq'; // hash for "password"

/**
 * Inject password hash into HTML file
 * @param {string} htmlPath - Path to the HTML file
 * @param {string} passwordHash - Bcrypt password hash
 */
function injectPasswordHash(htmlPath, passwordHash) {
  try {
    // Read the HTML file
    let html = fs.readFileSync(htmlPath, 'utf8');
    
    // Replace the placeholder with the actual password hash
    html = html.replace('$PASSWORD_HASH$', passwordHash);
    
    // Write the modified HTML back to the file
    fs.writeFileSync(htmlPath, html);
    
    console.log(`Password hash injected into ${htmlPath}`);
  } catch (error) {
    console.error(`Error injecting password hash: ${error.message}`);
  }
}

// Get password hash from environment variable
const passwordHash = process.env.PASSWORD_HASH || DEFAULT_HASH;

// Path to the HTML file
const htmlPath = path.join(__dirname, 'public', 'index.html');

// Inject password hash
injectPasswordHash(htmlPath, passwordHash);

console.log('Password hash injection complete');