export interface KeyToken {
  keytoken_id: string;
  name: string;
  timestamp_created: string;
  timestamp_lastused: string | null;
  owner_user_id: string;
  all_channels: boolean;
  channels: string[];
  token?: string;
  permissions: string;
  messages_sent: number;
}

export interface KeyTokenPreview {
  keytoken_id: string;
  name: string;
}

export type TokenPermission = 'A' | 'CR' | 'CS' | 'UR';

export interface CreateKeyRequest {
  name: string;
  permissions: string;
  all_channels?: boolean;
  channels?: string[];
}

export interface UpdateKeyRequest {
  name?: string;
  permissions?: string;
  all_channels?: boolean;
  channels?: string[];
}

export interface KeyListResponse {
  keys: KeyToken[];
}

export function parsePermissions(permissions: string): TokenPermission[] {
  if (!permissions) return [];
  return permissions.split(';').filter(p => p) as TokenPermission[];
}

export function hasPermission(permissions: string, required: TokenPermission): boolean {
  const perms = parsePermissions(permissions);
  return perms.includes(required) || perms.includes('A');
}

export function isAdminKey(key: KeyToken): boolean {
  return hasPermission(key.permissions, 'A');
}