/**
 * Feature Flag Condition Utilities
 *
 * Utilities for evaluating feature flag conditions and rules.
 *
 * @fileoverview Condition evaluation utilities
 * @version 1.0.0
 */
import type { FeatureFlagCondition } from '@plyaz/types';
/**
 * Evaluates condition operator against context value.
 *
 * @param condition - The condition to evaluate
 * @param contextValue - The context value to check against
 * @returns true if the condition matches
 */
export declare function evaluateConditionOperator(condition: FeatureFlagCondition, contextValue: unknown): boolean;
/**
 * Checks if operator is equality-based.
 *
 * @param operator - The operator to check
 * @returns true if equality operator
 */
export declare function isEqualityOperator(operator: string): boolean;
/**
 * Checks if operator is string-based.
 *
 * @param operator - The operator to check
 * @returns true if string operator
 */
export declare function isStringOperator(operator: string): boolean;
/**
 * Checks if operator is array-based.
 *
 * @param operator - The operator to check
 * @returns true if array operator
 */
export declare function isArrayOperator(operator: string): boolean;
/**
 * Checks if operator is numeric-based.
 *
 * @param operator - The operator to check
 * @returns true if numeric operator
 */
export declare function isNumericOperator(operator: string): boolean;
/**
 * Evaluates equality operators.
 *
 * @param operator - equals or not_equals
 * @param contextValue - Value from context
 * @param conditionValue - Value from condition
 * @returns Evaluation result
 */
export declare function evaluateEqualityOperator(operator: string, contextValue: unknown, conditionValue: unknown): boolean;
/**
 * Evaluates string operators.
 *
 * @param operator - contains or not_contains
 * @param contextValue - Value from context
 * @param conditionValue - Value from condition
 * @returns Evaluation result
 */
export declare function evaluateStringOperator(operator: string, contextValue: unknown, conditionValue: unknown): boolean;
/**
 * Evaluates array operators.
 *
 * @param operator - in or not_in
 * @param conditionValue - Array value from condition
 * @param contextValue - Value from context
 * @returns Evaluation result
 */
export declare function evaluateArrayOperator(operator: string, conditionValue: unknown, contextValue: unknown): boolean;
export declare function evaluateNumericOperator(operator: string, contextValue: unknown, conditionValue: unknown): boolean;
/**
 * Condition evaluation utilities.
 */
export declare const ConditionUtils: {
    /**
     * Evaluates multiple conditions with AND logic.
     *
     * @param conditions - Array of conditions
     * @param contextValue - Context value getter function
     * @returns true if all conditions match
     */
    readonly evaluateConditionsAnd: (conditions: FeatureFlagCondition[], contextValue: (field: string) => unknown) => boolean;
    /**
     * Evaluates multiple conditions with OR logic.
     *
     * @param conditions - Array of conditions
     * @param contextValue - Context value getter function
     * @returns true if any condition matches
     */
    readonly evaluateConditionsOr: (conditions: FeatureFlagCondition[], contextValue: (field: string) => unknown) => boolean;
    /**
     * Validates a condition structure.
     *
     * @param condition - Condition to validate
     * @returns Validation result
     */
    readonly validateCondition: (condition: Partial<FeatureFlagCondition>) => {
        isValid: boolean;
        errors: string[];
    };
    /**
     * Creates a condition object with validation.
     *
     * @param field - Context field to evaluate
     * @param operator - Comparison operator
     * @param value - Value to compare against
     * @returns Valid condition object
     */
    readonly createCondition: (field: string, operator: FeatureFlagCondition["operator"], value: FeatureFlagCondition["value"]) => FeatureFlagCondition;
};
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