/**
 * Cron expression parser with timezone support
 *
 * Features:
 * - Standard cron expression parsing (5 or 6 fields)
 * - Timezone-aware scheduling
 * - Human-readable descriptions
 * - Next/previous occurrence calculation
 * - Validation and error reporting
 */
/**
 * Cron field descriptor
 */
interface CronField {
    name: string;
    min: number;
    max: number;
    aliases?: Record<string, number>;
}
declare const CRON_FIELDS: CronField[];
/**
 * Common cron presets
 */
export declare const CRON_PRESETS: Record<string, string>;
/**
 * Parsed cron expression result
 */
export interface ParsedCron {
    expression: string;
    fields: {
        second?: number[];
        minute: number[];
        hour: number[];
        dayOfMonth: number[];
        month: number[];
        dayOfWeek: number[];
    };
    hasSeconds: boolean;
    timezone?: string;
}
/**
 * Cron iterator options
 */
export interface CronIteratorOptions {
    currentDate?: Date;
    startDate?: Date;
    endDate?: Date;
    timezone?: string;
    iterator?: boolean;
}
/**
 * Validate a cron expression
 */
export declare function validateCronExpression(expression: string): {
    valid: boolean;
    error?: string;
    normalized?: string;
};
/**
 * Parse a cron expression
 */
export declare function parseCronExpression(expression: string, timezone?: string): ParsedCron;
/**
 * Get the next occurrence of a cron expression
 */
export declare function getNextCronOccurrence(expression: string, options?: CronIteratorOptions): Date;
/**
 * Get the previous occurrence of a cron expression
 */
export declare function getPreviousCronOccurrence(expression: string, options?: CronIteratorOptions): Date;
/**
 * Get next N occurrences of a cron expression
 */
export declare function getNextCronOccurrences(expression: string, count: number, options?: CronIteratorOptions): Date[];
/**
 * Check if a cron expression matches a given date
 */
export declare function cronMatchesDate(expression: string, date: Date, timezone?: string): boolean;
/**
 * Calculate milliseconds until next occurrence
 */
export declare function msUntilNextCronOccurrence(expression: string, options?: CronIteratorOptions): number;
/**
 * Get human-readable description of a cron expression
 */
export declare function describeCronExpression(expression: string): string;
/**
 * Create a cron iterator
 */
export declare function createCronIterator(expression: string, options?: CronIteratorOptions): {
    next: () => Date | null;
    prev: () => Date | null;
    hasNext: () => boolean;
    hasPrev: () => boolean;
    reset: (date?: Date) => void;
};
/**
 * Check if cron expression is valid
 */
export declare function isValidCronExpression(expression: string): boolean;
/**
 * Get all supported timezones
 */
export declare function getSupportedTimezones(): string[];
/**
 * Check if timezone is valid
 */
export declare function isValidTimezone(timezone: string): boolean;
export { CRON_FIELDS };
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