import { MONTHS } from './constants';

const monthOfInt = (x: number): string => MONTHS[x] || '';

const initArray = <T>(length: number, func: (number) => T): T[] =>
  Array.from(Array(length)).map((_, index) => func(index));

const formatString = (float: number): string => String(float);

const formatTitleString = (date: Date): string => {
  const month = date.getMonth();
  const year = date.getFullYear();

  return monthOfInt(month) + ' ' + formatString(year);
};

const eqDate = (date1: Date, date2: Date): boolean => {
  return date1.toDateString() === date2.toDateString();
};

const hasVisibleDate = (dates: (Date | undefined)[]): boolean => {
  return dates.some(date => date !== undefined);
};

export { monthOfInt, initArray, formatString, formatTitleString, eqDate, hasVisibleDate };