import { format, isToday, isYesterday } from 'date-fns';

import { ptBR } from 'date-fns/locale';

import type { BadgeVariant } from '@/components/ui/Badge';

type TimeBadgeVariant = 'morning' | 'afternoon' | 'night' | 'latenight';

export const TIME_BADGES: Record<TimeBadgeVariant, { label: string; variant: BadgeVariant; }> = {

  morning:   { label: 'Manhã',     variant: "green" },

  afternoon: { label: 'Tarde',     variant: "orange" },

  night:     { label: 'Noite',     variant: "blue" },

  latenight: { label: 'Madrugada', variant: "purple" },

};

export const getTimeBadge = (date: Date) => {

  const h = date.getHours();

  if (h >= 6  && h < 12) return TIME_BADGES.morning;

  if (h >= 12 && h < 18) return TIME_BADGES.afternoon;

  if (h >= 18 && h < 24) return TIME_BADGES.night;

  return TIME_BADGES.latenight;

}

export const formatMoment = (date: Date): string => {

  if (isToday(date))     return `Hoje às ${format(date, "HH'h'mm")}`;

  if (isYesterday(date)) return `Ontem às ${format(date, "HH'h'mm")}`;

  return format(date, "d 'de' MMM 'às' HH'h'mm", { locale: ptBR });

}

// When it's a raw date only field, it should output stuff like

// Hoje, 10/10

// Ontem, 09/10

// 09/10/26

export const formatDate = (date: Date): string => {

  if (isToday(date))     return `Hoje, ${format(date, "dd/MM")}`;

  if (isYesterday(date)) return `Ontem, ${format(date, "dd/MM")}`;

  return format(date, "dd/MM/yyyy", { locale: ptBR });

}

// Parse a date-only string (YYYY-MM-DD or ISO UTC midnight) as local noon

// to prevent timezone offsets from shifting the calendar day

export const parseDateOnly = (dateStr: string | Date): Date => {

  const iso = typeof dateStr === 'string' ? dateStr : dateStr.toISOString();

  return new Date(`${iso.slice(0, 10)}T12:00:00`);

};