export declare type ValidationSpecs = {
    minLength?: number;
    maxLength?: number;
    minValue?: number;
    maxValue?: number;
    minDate?: Date;
    maxDate?: Date;
};
export declare type ModelFieldError<K extends string = "empty", J extends {
    [key in string | number]: any;
} = {}> = {
    errorCode: ValidationErrors | K;
    specs?: ValidationSpecs & J;
};
export declare type ModelErrors<T, J extends string = "empty"> = {
    [K in keyof T]?: ModelFieldError<J>;
};
export declare type ValidationTypeWithoutSpecs = "required" | "isDate" | "validEmail" | "strongPassword" | "isPhoneNumber";
export declare type ValidationTypeWithSpecs = "dateRange" | "valueRange" | "textLength";
export declare type ValidationType = ValidationTypeWithoutSpecs | ValidationTypeWithSpecs;
export declare type ValidationErrors = "empty" | "invalidDate" | "invalidEmail" | "weakPassword" | "beforeMinDate" | "afterMaxDate" | "lessThanMinLength" | "moreThanMaxLength" | "lessThanMinValue" | "moreThanMaxValue" | "invalidInput" | "invalidPhoneNumber";
export declare type FormFieldTypes = "date" | "string" | "number" | "array" | "object";
declare type SpecialPick<T, K extends keyof T, P extends keyof T> = Required<Pick<T, K>> | Required<Pick<T, P>> | Required<Pick<T, K | P>>;
export declare class FormValidator<T> {
    private originalFormObject;
    private formObject;
    private formObjectErrors;
    private customValidators;
    constructor(formObject: T);
    /**
     * Validates the specified fields based on the validation type
     * @param fields The fields to be validated
     * @param type The type of validation
     * @important Not matching `ValidationTypeWithoutSpecs` typescript error means that you need to provide a specs object as a third paramenter for the selected type
     * @returns The form validator
     */
    addValidation(fields: Array<keyof T>, type: ValidationTypeWithoutSpecs): FormValidator<T>;
    /**
     * Validates the specified fields based on the validation type
     * @param fields The fields to be validated
     * @param type The type of validation `"dateRange"`
     * @param spec The specifications of the validation (`minDate` and/or `maxDate`)
     * @returns The form validator
     */
    addValidation(fields: Array<keyof T>, type: "dateRange", specs: SpecialPick<ValidationSpecs, "minDate", "maxDate">): FormValidator<T>;
    /**
     * Validates the specified fields based on the validation type
     * @param fields The fields to be validated
     * @param type The type of validation `"textLength"`
     * @param spec The specifications of the validation (`minLength` and/or `maxLength`)
     * @returns The form validator
     */
    addValidation(fields: Array<keyof T>, type: "textLength", specs: SpecialPick<ValidationSpecs, "minLength", "maxLength">): FormValidator<T>;
    /**
     * Validates the specified fields based on the validation type
     * @param fields The fields to be validated
     * @param type The type of validation `"valueRange"`
     * @param spec The specifications of the validation (`minValue` and/or `maxValue`)
     * @returns The form validator
     */
    addValidation(fields: Array<keyof T>, type: "valueRange", specs: SpecialPick<ValidationSpecs, "minValue", "maxValue">): FormValidator<T>;
    /**
     * Add a custom validator that returns an error message if found
     * @param {Array<string>} errorFields The fields where the error is reported to
     * @param {function} validator The validator method
     * @returns {FormValidator} The form validator object
     * @example addValidator(["balance", "payment"], ["payment"], (balance: number, payment: number) => { return payment > balance ? "The payment exceeds your balance" : null; });
     */
    addCustomValidation(errorFields: Array<keyof T>, validator: () => ModelFieldError<any>): FormValidator<T>;
    /**
     * Get the error found in the form object. Has to be called after `validate` method has been called.
     * @returns {any} The form object object populated by validation errors, if found any. Otherwise, it's an empty object.
     */
    getErrors(): ModelErrors<T>;
    /**
     * Get a specific error found during validation, if any. Has to be called after `validate` method has been called.
     * @returns {any} The error of the specific item in the form, if any.
     */
    getError(name: keyof T): ModelFieldError;
    /**
     * Validates the form object passed in the constructor
     * @returns {FormValidator} The form validator object
     */
    validate(): FormValidator<T>;
    /**
     * Validate a parameter in the form formObject based on predefined set of criteria
     * @param {ValidatorModelItem} fieldObject The field object stored in the local formObject
     * @returns {string} The error found in the parameter
     */
    private validateField;
    private isValidType;
}
export {};