export interface AuditConfig {
  storage: AuditStorage;
  stream?: boolean;
  retention?: string;
  encryption?: boolean;
  onError?: (error: AuditError) => void;
  filters?: AuditFilter[];
  formatters?: AuditFormatter[];
}

export type AuditStorage = 
  | 'firebase'
  | 'supabase' 
  | 'postgres' 
  | 'mongodb' 
  | 'elasticsearch'
  | 'custom';

export interface AuditEvent {
  id: string;
  timestamp: Date;
  actor: Actor;
  action: string;
  resource: Resource;
  result: 'success' | 'failure' | 'error';
  changes?: Changes;
  metadata?: Record<string, any>;
  context?: Context;
  tags?: string[];
}

export interface Actor {
  id: string;
  type: 'user' | 'system' | 'api' | 'service';
  name?: string;
  email?: string;
  metadata?: Record<string, any>;
}

export interface Resource {
  type: string;
  id: string;
  name?: string;
  parent?: Resource;
  metadata?: Record<string, any>;
}

export interface Changes {
  before?: Record<string, any>;
  after?: Record<string, any>;
  diff?: ChangeDiff[];
}

export interface ChangeDiff {
  field: string;
  before: any;
  after: any;
  operation: 'add' | 'update' | 'delete';
}

export interface Context {
  ip?: string;
  userAgent?: string;
  sessionId?: string;
  requestId?: string;
  correlationId?: string;
  location?: {
    country?: string;
    city?: string;
    lat?: number;
    lon?: number;
  };
}

export interface AuditError {
  code: string;
  message: string;
  event?: Partial<AuditEvent>;
  originalError?: any;
}

export interface AuditFilter {
  name: string;
  filter: (event: AuditEvent) => boolean;
}

export interface AuditFormatter {
  name: string;
  format: (event: AuditEvent) => AuditEvent;
}