import { getToday } from "./tz.js";

function parseDate(s: string): Date {
  return new Date(s.length === 10 ? s + "T12:00:00" : s);
}

export const fmt = {
  g(n: number | null | undefined): string {
    if (n == null) return "—";
    const trimmed = (+n).toFixed(2).replace(/\.?0+$/, "");
    return `${trimmed || "0"} g`;
  },
  money(n: number | null | undefined): string {
    if (n == null) return "—";
    return `$${(+n).toFixed(2)}`;
  },
  moneyShort(n: number | null | undefined): string {
    if (n == null) return "—";
    return n >= 100 ? `$${Math.round(n)}` : `$${(+n).toFixed(2)}`;
  },
  pct(n: number | null | undefined): string {
    if (n == null) return "—";
    return `${(+n).toFixed(1)}%`;
  },
  date(s: string | null | undefined, tz?: string): string {
    if (!s) return "—";
    const opts: Intl.DateTimeFormatOptions = { month: "short", day: "numeric", year: "numeric" };
    if (tz) opts.timeZone = tz;
    return parseDate(s).toLocaleDateString("en-US", opts);
  },
  dateShort(s: string | null | undefined, tz?: string): string {
    if (!s) return "—";
    const opts: Intl.DateTimeFormatOptions = { month: "short", day: "numeric" };
    if (tz) opts.timeZone = tz;
    return parseDate(s).toLocaleDateString("en-US", opts);
  },
  daysAgo(s: string | null | undefined, tz?: string): string {
    if (!s) return "—";
    const todayMs = +parseDate(tz ? getToday(tz) : new Date().toISOString().slice(0, 10));
    const thenMs = +parseDate(s);
    const d = Math.floor((todayMs - thenMs) / 86_400_000);
    if (d === 0) return "today";
    if (d === 1) return "yesterday";
    if (d < 0) return "in the future";
    if (d < 30) return `${d}d ago`;
    if (d < 365) return `${Math.floor(d / 30)}mo ago`;
    return `${Math.floor(d / 365)}y ago`;
  },
};

export const TYPE_GLYPHS: Record<string, string> = {
  Flower: "✿",
  Concentrate: "◆",
  Edible: "◐",
  Vaporizer: "▢",
  "Pre-roll": "│",
  Tincture: "◯",
};