// Test the current userMapping logic with real email data
const stripTechnicalSuffixes = (email) => {
  if (!email || typeof email !== 'string') {
    return email;
  }
  
  return email
    .replace(/_barclays\.com#ext#@olivermarketing\.onmicrosoft\.com$/, '')
    .replace(/_barclaycard\.co\.uk#ext#@olivermarketing\.onmicrosoft\.com$/, '')
    .replace(/_[^_]+\.(com|co\.uk)#ext#@olivermarketing\.onmicrosoft\.com$/, '');
};

const getFriendlyNameFromEmail = (email) => {
  if (!email || typeof email !== 'string') {
    return email || 'Unknown User';
  }
  
  const cleanEmail = stripTechnicalSuffixes(email);
  const prefix = cleanEmail.split('@')[0];
  
  if (!prefix) {
    return email;
  }
  
  // Handle Oliver agency emails (camelCase format like 'michaelclervi')
  if (email.includes('@oliver.agency')) {
    // Try to split camelCase into words
    const words = prefix.match(/[A-Z][a-z]*|[a-z]+/g) || [prefix];
    if (words.length >= 2) {
      return words.map(word => word.charAt(0).toUpperCase() + word.slice(1).toLowerCase()).join(' ');
    } else {
      // Single word, just capitalize first letter
      return prefix.charAt(0).toUpperCase() + prefix.slice(1).toLowerCase();
    }
  } else {
    // Handle external emails (dot.separated format like 'adam.webb')
    const spaced = prefix.replace(/[._-]/g, ' ');
    
    // Title case each word
    const titleCased = spaced
      .toLowerCase()
      .split(' ')
      .map(word => word.charAt(0).toUpperCase() + word.slice(1))
      .join(' ');
      
    return titleCased;
  }
};

// Test with actual email patterns
const testEmails = [
  'michaelclervi@oliver.agency',
  'adam.webb_barclaycard.co.uk#ext#@olivermarketing.onmicrosoft.com',
  'aileen.stevenson_barclays.com#ext#@olivermarketing.onmicrosoft.com',
  'christopher.x.perkins_barclays.com#ext#@olivermarketing.onmicrosoft.com',
  'jeremycrockerwhite@oliver.agency',
  'armanpreetkapoor@oliver.agency',
  'daveporter@oliver.agency'
];

console.log('Testing email name extraction:');
testEmails.forEach(email => {
  const stripped = stripTechnicalSuffixes(email);
  const friendly = getFriendlyNameFromEmail(email);
  console.log(`${email}`);
  console.log(`  Stripped: ${stripped}`);
  console.log(`  Friendly: ${friendly}`);
  console.log('');
});