import { Filter, ShortHandEqualType } from '@loopback/filter';
import { KeyOf, Operators, PredicateComparison } from '@loopback/filter/src/query';
import { AnyObject } from '@loopback/repository';
export type ExprVar = any;
export type NullablePredicateComparison<PT> = Omit<PredicateComparison<PT>, 'eq' | 'neq'> & {
    eq?: PT | null;
    neq?: PT | null;
};
/**
 * Condition clause
 *
 * @example
 * ```ts
 * {
 *   name: {inq: ['John', 'Mary']},
 *   status: 'ACTIVE',
 *   age: {gte: 40}
 * }
 * ```
 */
export type QueryCondition<MT extends object> = {
    [P in KeyOf<MT>]?: NullablePredicateComparison<MT[P]> | (MT[P] & ShortHandEqualType) | null;
} | Record<string, NullablePredicateComparison<ShortHandEqualType> | ShortHandEqualType | null>;
export type QueryWhere<MT extends object = AnyObject> = QueryCondition<MT> | QueryAndClause<MT> | QueryOrClause<MT> | ExprClause | JoinClause;
export type ExprClause = {
    $expr: {
        [op in Operators]?: [ExprVar, ExprVar];
    };
};
export type JoinClause = {
    $join: string | string[];
};
/**
 * And clause
 *
 * @example
 * ```ts
 * {
 *   and: [...],
 * }
 * ```
 */
export interface QueryAndClause<MT extends object> {
    and: QueryWhere<MT>[];
}
/**
 * Or clause
 *
 * @example
 * ```ts
 * {
 *   or: [...],
 * }
 * ```
 */
export interface QueryOrClause<MT extends object> {
    or: QueryWhere<MT>[];
}
export type QueryFilter<MT extends object = AnyObject> = Omit<Filter<MT>, 'where'> & {
    where?: QueryWhere<MT>;
};