// import { MS_PER_DAY } from "src/modules/shared/constants/date-time.constant";
// import { DAY_KEYS, DayKey } from "./timesheet.types";

// export function toUTCDateOnly(date: Date | string): Date {
//   const d = new Date(date);
//   return new Date(Date.UTC(d.getUTCFullYear(), d.getUTCMonth(), d.getUTCDate()));
// }

// export function addDays(date:Date, days: number): Date {
//     return new Date(date.getTime() + days * MS_PER_DAY);
// }

// export function endOfDayUTC(date: Date | string): Date {
//   const d = toUTCDateOnly(date);
//   return new Date(d.getTime() + MS_PER_DAY - 1); 
// }

// export function isBetweenUTC(date: Date, start: Date, end_inclusive: Date): boolean {
//     const time   = date.getTime();
//     return time >= start.getTime() && time <= end_inclusive.getTime();
// }

// export function toTimeString(date: Date): string {
//     const hours   = String(date.getUTCHours()).padStart(2,'0');
//     const minutes = String(date.getUTCMinutes()).padStart(2,'0');
//     return `${hours}:${minutes}`;
// }

// export function round2(num: number) { 
//     return Math.round(num * 100) / 100; 
// }

// export function shortDate(date:Date): string {
//     const mm = String(date.getUTCMonth()+1).padStart(2,'0');
//     const dd = String(date.getUTCDate()).padStart(2,'0');
//     return `${mm}/${dd}`;
// }

// export function dayKeyFromDate(date: Date, useUTC = true): DayKey {
//   const index = useUTC ? date.getUTCDay() : date.getDay(); // 0=Sunday..6=Saturday
//   return DAY_KEYS[index];
// }

// export const toHHmm = (date: Date) => date.toISOString().slice(11, 16);

// export function parseISODate(iso: string): Date {
//     const [ y, m, d ] = iso.split('-').map(Number);
//     return new Date(y, (m ?? 1) - 1, d ?? 1);
// }

// export function parseHHmm(t: string): Date {
//     const [ hh, mm ] = t.split(':').map(Number);
//     return new Date(1970, 0, 1, hh || 0, mm || 0, 0, 0);
// }

// export const toNum = (value: any) =>
//         value && typeof value.toNumber === 'function' ? value.toNumber() :
//         typeof value === 'number' ? value :
//         value ? Number(value) : 0;


// export const upper = (s?: string | null) => String(s ?? '').toUpperCase();

// export const toRangeFromPeriod = (period: { period_start: Date; period_end: Date }) => ({
//   from: toUTCDateOnly(period.period_start),
//   to: endOfDayUTC(period.period_end),
// });