import { Condition } from './condition';
import { Engine } from './engine';
import { RuleJson } from './interfaces';
/**
 * Rule.
 */
export declare class Rule {
    constructor(json?: RuleJson, engine?: Engine);
    /**
     * Rule type.
     */
    private type;
    /**
     * Rule items.
     */
    private items;
    /**
     * Engine instance.
     */
    private engine;
    /**
     * Add a condition with an equals operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    equals(fact: string, value: any): this;
    /**
     * Add a condition with an notEquals operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    notEquals(fact: string, value: any): this;
    /**
     * Add a condition with an in operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    in(fact: string, value: string): this;
    /**
     * Add a condition with an notIn operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    notIn(fact: string, value: string): this;
    /**
     * Add a condition with an contains operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    contains(fact: string, value: any): this;
    /**
     * Add a condition with an notContains operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    notContains(fact: string, value: any): this;
    /**
     * Add a condition with an lessThan operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    lessThan(fact: string, value: number): this;
    /**
     * Add a condition with an lessThanOrEquals operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    lessThanOrEquals(fact: string, value: number): this;
    /**
     * Add a condition with an greaterThan operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    greaterThan(fact: string, value: number): this;
    /**
     * Add a condition with an greaterThanOrEquals operator.
     *
     * @param fact Property name or dot notation path.
     * @param value Value to compare.
     */
    greaterThanOrEquals(fact: string, value: number): this;
    /**
     * Add a condition.
     *
     * @param fact Property name or dot notation path.
     * @param operator Name of operator to use.
     * @param value Value to compare.
     */
    add(fact: string, operator: string, value: any): this;
    /**
     * Add a nested AND rule.
     *
     * @param fn Callback function.
     */
    and(fn: (rule: Rule) => void): this;
    /**
     * Add a nested OR rule.
     *
     * @param fn Callback function.
     */
    or(fn: (rule: Rule) => void): this;
    /**
     * Evaluate a rule's conditions against the provided data.
     *
     * @param data Data object to use.
     */
    evaluate(data: Record<string, unknown>): boolean;
    /**
     * To json.
     */
    toJSON(): {
        [x: string]: (Condition | Rule)[];
    };
    /**
     * Init rule from json object.
     *
     * @param json Json object.
     */
    private init;
    /**
     * Identifies if a json object is a rule or a condition.
     *
     * @param json Object to check.
     */
    private isRule;
}