export interface ISanitizeOptions {
    /** Set undefined values to defaults (if configured). Default is false. */
    defaults?: boolean;
    /** Unset all properties that are not provided in the data. Default is false. */
    replace?: boolean;
    /** Parent schema node */
    parent?: ISchemaParent;
}
export interface ISchema<T, TSchemaInstance extends ISchemaInstance<T>, TToObject = any> {
    options: ISchemaOptions<TSchemaInstance>;
    create(value: any, sanitizeOptions?: ISanitizeOptions): TSchemaInstance;
    populate?(instance: TSchemaInstance, populateReference: PopulateReference): Promise<T>;
    toObject(instance: TSchemaInstance, toObjectOptions?: IToObjectOptions): TToObject;
    validate(instance: TSchemaInstance): Promise<void>;
}
export interface ISchemaInstance<T = any> {
    parent?: ISchemaParent;
    schema: ISchema<T, ISchemaInstance<T>>;
    value: T;
}
export interface ISchemaOptions<TSchemaInstance extends ISchemaInstance<any>> {
    required?: boolean;
    validate?(instance: TSchemaInstance): Promise<void>;
}
export interface ISchemaParent<T = any> {
    instance: ISchemaParentInstance<T>;
    path: string | number;
}
export interface ISchemaParentInstance<T = any> extends ISchemaInstance<T> {
    beforeChange(path: Path, rawValue: any, oldInstance: ISchemaInstance<T>): any;
    afterChange(path: Path, rawValue: any, newInstance: ISchemaInstance<T>): any;
}
export interface IToObjectOptions {
    /** Turn populated references into references */
    unpopulate?: boolean;
}
export declare type Path = Array<string | number>;
export declare type PopulateMap<T extends object = object> = {
    [key in keyof T]?: PopulateReference;
};
export declare type PopulateReference<T extends object = object> = PopulateMap<T> | true;
export declare type SchemaInstanceMap<T extends object = object> = {
    [key in keyof T]?: ISchemaInstance;
};
export declare type SchemaMap<T extends object = object> = {
    [key in keyof T]: ISchema<any, any>;
};
export declare function validate<TSchemaInstance extends ISchemaInstance>(schemaOptions: ISchemaOptions<TSchemaInstance>, instance: TSchemaInstance): Promise<void>;