import { type ValidationError } from "@todu/core";
export type ScheduleValidationCode = "invalid-rrule" | "unsupported-rrule";
export interface NormalizedScheduleRule {
    rule: string;
    parts: Readonly<Record<string, string>>;
    changed: boolean;
}
export interface ScheduleValidationIssue {
    code: ScheduleValidationCode;
    field: "schedule";
    message: string;
    cause?: ValidationError;
}
export type NormalizeScheduleRuleResult = {
    ok: true;
    value: NormalizedScheduleRule;
} | {
    ok: false;
    error: ScheduleValidationIssue;
};
declare const validateAndNormalizeScheduleRule: (rule: string) => NormalizeScheduleRuleResult;
declare const parseScheduleRuleParts: (rule: string) => {
    ok: true;
    value: {
        entries: Array<[string, string]>;
    };
} | {
    ok: false;
    error: ScheduleValidationIssue;
};
declare const normalizeSchedulePartValue: (key: string, value: string) => string;
declare const formatNormalizedRule: (entries: ReadonlyArray<readonly [string, string]>) => string;
declare const mapScheduleValidationError: (error: ValidationError) => ScheduleValidationIssue;
declare const createScheduleValidationIssue: (code: ScheduleValidationCode, message: string, cause?: ValidationError) => ScheduleValidationIssue;
export { createScheduleValidationIssue, formatNormalizedRule, mapScheduleValidationError, normalizeSchedulePartValue, parseScheduleRuleParts, validateAndNormalizeScheduleRule, };