export function encodePassphrase(passphrase: string) {
  return encodeURIComponent(passphrase);
}

export function decodePassphrase(base64String: string) {
  return decodeURIComponent(base64String);
}

export function generateRoomId(): string {
  return `${randomString(4)}-${randomString(4)}`;
}

export function randomString(length: number): string {
  let result = '';
  const characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
  const charactersLength = characters.length;
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
  }
  return result;
}

export function mergeClasses(...classes: (string | undefined | null | false)[]): string {
  return classes.filter(Boolean).join(' ');
}

export function getAvatarColor(identity: string): string {
  const colors = [
    '#4CAF50',
    '#8BC34A',
    '#CDDC39',
    '#FFC107',
    '#FF9800',
    '#FF5722',
    '#F44336',
    '#E91E63',
    '#9C27B0',
    '#673AB7',
    '#3F51B5',
    '#2196F3',
    '#03A9F4',
    '#00BCD4',
    '#009688',
  ];

  let hash = 0;
  for (let i = 0; i < identity.length; i++) {
    hash = identity.charCodeAt(i) + ((hash << 5) - hash);
  }

  const index = Math.abs(hash) % colors.length;
  return colors[index];
}

export function getInitials(name: string): string {
  if (!name) return '?';

  const parts = name.split(' ');
  if (parts.length === 1) {
    return parts[0].charAt(0).toUpperCase();
  }

  return (parts[0].charAt(0) + parts[parts.length - 1].charAt(0)).toUpperCase();
}