import type { Validation, RuleBuilder, FieldContext, ComparisonOperators, ArrayComparisonOperators, NumericComparisonOperators } from '../../types.js';
/**
 * Abstract base class providing conditional validation methods for making fields
 * required based on runtime conditions. This class is extended by schema types
 * that support conditional validation.
 *
 * @example
 * vine.string().optional().requiredWhen('role', '=', 'admin')
 */
export declare abstract class ConditionalValidations {
    /**
     * Adds a validation rule to the schema's validation chain.
     * Must be implemented by the extending class.
     *
     * @param validation - The validation rule or rule builder to add
     */
    abstract use(validation: Validation<any> | RuleBuilder): this;
    /**
     * Marks the field as required when a condition is met. Can be used with a callback
     * or with comparison operators to compare another field's value.
     *
     * @param otherField - Field name to compare or callback function
     * @param operator - Comparison operator (=, !=, in, notIn, >, <, >=, <=)
     * @param expectedValue - Expected value to compare against
     *
     * @example
     * vine.string().optional().requiredWhen('role', '=', 'admin')
     *
     * @example
     * vine.string().optional().requiredWhen('age', '>', 18)
     *
     * @example
     * vine.string().optional().requiredWhen((field) => field.data.isAdmin === true)
     */
    requiredWhen<Operator extends ComparisonOperators>(otherField: string, operator: Operator, expectedValue: Operator extends ArrayComparisonOperators ? (string | number | boolean)[] : Operator extends NumericComparisonOperators ? number : string | number | boolean): this;
    requiredWhen(callback: (field: FieldContext) => boolean): this;
    /**
     * Marks the field as required when all specified fields exist (are not undefined or null).
     *
     * @param fields - Field name or array of field names to check for existence
     *
     * @example
     * vine.string().optional().requiredIfExists('email')
     *
     * @example
     * vine.string().optional().requiredIfExists(['firstName', 'lastName'])
     */
    requiredIfExists(fields: string | string[]): this;
    /**
     * Marks the field as required when any one of the specified fields exists (is not undefined or null).
     *
     * @param fields - Array of field names to check for existence
     *
     * @example
     * vine.string().optional().requiredIfAnyExists(['email', 'phone'])
     */
    requiredIfAnyExists(fields: string[]): this;
    /**
     * Marks the field as required when all specified fields are missing (undefined or null).
     *
     * @param fields - Field name or array of field names to check for absence
     *
     * @example
     * vine.string().optional().requiredIfMissing('addressId')
     *
     * @example
     * vine.string().optional().requiredIfMissing(['street', 'city'])
     */
    requiredIfMissing(fields: string | string[]): this;
    /**
     * Marks the field as required when any one of the specified fields is missing (undefined or null).
     *
     * @param fields - Array of field names to check for absence
     *
     * @example
     * vine.string().optional().requiredIfAnyMissing(['street', 'city', 'zipCode'])
     */
    requiredIfAnyMissing(fields: string[]): this;
}