import { formatPrice } from "../lib/format";
import type { TaxBreakdownGroup } from "@einfach-produktiv/invoicing";

// The actual amount of VAT included in a total — not just a disclosure
// that VAT is included (see cartTotals.ts's effectiveTaxRate() for the
// "which %" shown next to each line item elsewhere). One line per rate
// when a cart/order spans more than one; a single line otherwise.
//
// Same row shape as the Gesamtsumme total line right above this
// (`flex w-full` + a `flex-1` spacer): a label on the left, flush with
// "Gesamtsumme", and the rate/amount pushed flush right so they land
// directly under the total's own € amount — not tucked in right next to
// the label. The rate itself gets a fixed-width right-aligned column
// (`w-8`, `tabular-nums`) so a single-digit rate ("7%") still lines up
// under a two-digit one ("19%") across rows instead of shifting the
// amount that follows it. Only the first row carries the "enthält
// MwSt.:" label; further rates repeat just the rate/amount pair.
export function VatBreakdown({ groups }: { groups: TaxBreakdownGroup[] }) {
  if (groups.length === 0) return null;
  return (
    <div className="flex flex-col gap-0.5 w-full">
      {groups.map((g, i) => (
        <div key={g.rate} className="flex items-baseline w-full">
          <span className="text-label text-text-muted">
            {groups.length === 1 ? `enthält ${g.rate}% MwSt.` : i === 0 ? "enthält MwSt.:" : ""}
          </span>
          <span className="flex-1" />
          {groups.length > 1 && (
            <span className="w-8 shrink-0 text-right text-label text-text-muted tabular-nums">{g.rate}%</span>
          )}
          <span className="ml-1.5 text-label text-text-muted tabular-nums">{formatPrice(g.tax)}</span>
        </div>
      ))}
    </div>
  );
}