import { type Plurality, type Chorionicity, type BirthGuideline } from './obstetrics';
export type AntenatalCategory = 'scan' | 'screening' | 'diagnostic' | 'lab' | 'prophylaxis' | 'milestone';
/** Which national schedule to resolve. Italy is the default market. */
export type ScheduleLocale = 'it' | 'uk' | 'international';
/** Status of a window relative to the reference date (keyed off its end). */
export type AntenatalStatus = 'past' | 'current' | 'upcoming';
/** Gestational-diabetes risk tier (drives which OGTT window applies). */
export type GdmRisk = 'high' | 'medium';
/** A clinical condition gating whether an event applies to a pregnancy. */
export type AntenatalCondition = 'rh-negative' | 'gdm-high' | 'gdm-medium' | 'on-indication';
export interface AntenatalEvent {
    /** Stable key → i18n lookup `antenatalSchedule.event.<key>`. */
    key: string;
    category: AntenatalCategory;
    /** Window start as GA days from gestationalStart (week*7 + day). Inclusive. */
    startDay: number;
    /** Window end as GA days. Inclusive. Equals `startDay` for single dates. */
    endDay: number;
    /** Restrict to these pluralities (omit ⇒ applies to all). */
    plurality?: Plurality[];
    /** Restrict to these chorionicities (omit ⇒ any). */
    chorionicity?: Chorionicity[];
    /** Gate behind a clinical condition (omit ⇒ always applies). */
    condition?: AntenatalCondition;
    /** Citation key for provenance display. */
    source: string;
    /** Interpolation values for the event's i18n string (e.g. surveillance cadence). */
    meta?: Record<string, string | number>;
}
export interface ResolvedAntenatalEvent extends AntenatalEvent {
    /** Absolute window start date. */
    start: Date;
    /** Absolute window end date (=== `start` for a single-date event). */
    end: Date;
    /** True when the event is a single calendar date, not a range. */
    single: boolean;
    /** Status relative to the reference date, keyed off the window end. */
    status: AntenatalStatus;
    /** Reference date is within `nearDays` before the window end. */
    near: boolean;
}
export interface AntenatalScheduleOptions {
    /** Reference date for status. Defaults to the host's current date. */
    today?: Date;
    /** National schedule. Defaults to `'it'`. */
    schedule?: ScheduleLocale;
    /** Number of fetuses. Defaults to `'singleton'`. */
    plurality?: Plurality;
    /** Placentation, for multiples. Defaults to `'unknown'`. */
    chorionicity?: Chorionicity;
    /** Surface the anti-D prophylaxis event (Rh-negative, non-sensitised). */
    rhNegative?: boolean;
    /** Surface the matching OGTT window for the patient's GDM risk tier. */
    gdmRisk?: GdmRisk;
    /** Include `on-indication` diagnostics (CVS, amnio, NIPT). Default false. */
    includeOnIndication?: boolean;
    /** Planned-birth guideline for multiples. Defaults to `'nice'`. */
    birthGuideline?: BirthGuideline;
    /** Days before a window's end still counted as `current`. Default 14. */
    nearDays?: number;
}
/**
 * Resolve the antenatal schedule for a pregnancy to dated, status-tagged
 * windows, ordered by start date (then end date). Pure: the only clock is
 * `opts.today` (defaults to a fresh `Date`).
 */
export declare function computeAntenatalSchedule(gestationalStart: Date, opts?: AntenatalScheduleOptions): ResolvedAntenatalEvent[];
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