import { getDirection, type Locale } from "../LanguageSwitcher";

/* Exported from Figma assets/eu-en (224:11275) and assets/eu-en - darkBg
   (238:2325). The source files are downscaled copies of the Figma exports. */
const EMBLEM_SRC = {
  light: "/assets/eu-flag.png",
  dark: "/assets/eu-flag-dark.png",
} as const;

const EMBLEM_INTRINSIC_WIDTH = 192;
const EMBLEM_INTRINSIC_HEIGHT = 128;

/**
 * Drawn emblem box per size. "md" is the 48x32 the navigation and the drawer
 * use; "sm" is the 36x24 the home hero draws above the wordmark (478:15951).
 * Only the emblem changes - see the note on the statement below.
 */
const EMBLEM_BOX = {
  md: "h-[32px] w-[48px]",
  sm: "h-[24px] w-[36px]",
} as const;

export type EuBadgeSize = keyof typeof EMBLEM_BOX;

/** Which tier-2 surface the badge is sitting on. `:root` is the dark one. */
export type EuBadgeSurface = keyof typeof EMBLEM_SRC;

export interface EuBadgeProps {
  /** "Funded by the European Union", already in the reader's language. */
  statement: string;
  /** Alt text for the emblem. Empty when the statement is rendered beside it. */
  emblemAlt?: string;
  /** Language of `statement` - drives the font switch and the text direction. */
  locale: Locale;
  surface: EuBadgeSurface;
  /** "md" (48x32) by default; "sm" (36x24) for the hero lockup. */
  size?: EuBadgeSize;
  className?: string;
}

/**
 * The mandatory EU visibility lockup: emblem + funding statement.
 *
 * The lockup itself is pinned to `dir="ltr"` so the emblem always leads, which
 * is how the Arabic navigation frame (334:526) draws it; only the statement
 * carries the reader's own direction. A mirroring ancestor still moves the
 * whole badge from the inline start to the inline end in Arabic.
 *
 * DEVIATION FROM FIGMA (colour): the design sets the statement in EU reflex
 * blue (hex 0f2a8e). A raw hex is not permitted in a component here, and there
 * is no semantic token for a third-party brand colour, so the statement uses
 * --text-primary. It stays legible on both surfaces and the emblem still
 * carries the EU colours. Add a tier-2 token if the blue has to come back.
 *
 * DEVIATION FROM FIGMA (type): the hero badge sets the statement at 10px. The
 * type scale has no 10px role and a raw font-size is not permitted, so both
 * sizes render the statement at `label-md` (12px). The lockup is then a little
 * taller than the 24px emblem at "sm"; it is also more legible, which EU
 * visibility guidance asks for. Add a tier-2 role if 10px is required.
 */
export function EuBadge({
  statement,
  emblemAlt = "",
  locale,
  surface,
  size = "md",
  className,
}: EuBadgeProps) {
  return (
    <div
      dir="ltr"
      className={["flex shrink-0 items-center gap-2xs", className]
        .filter(Boolean)
        .join(" ")}
    >
      <img
        src={EMBLEM_SRC[surface]}
        alt={emblemAlt}
        width={EMBLEM_INTRINSIC_WIDTH}
        height={EMBLEM_INTRINSIC_HEIGHT}
        loading="eager"
        decoding="async"
        draggable={false}
        className={`block shrink-0 ${EMBLEM_BOX[size]}`}
      />
      <span
        lang={locale}
        dir={getDirection(locale)}
        className="label-md block w-[96px] text-[var(--text-primary)]"
      >
        {statement}
      </span>
    </div>
  );
}

export default EuBadge;

/* ---------------------------------------------------------------------------
   USAGE
   ---------------------------------------------------------------------------
   // In the mobile drawer, on the dark surface:
   <EuBadge statement={t("site.euStatement")} locale="en" surface="dark" />

   // Above the home hero wordmark, at the smaller emblem size:
   <EuBadge
     size="sm"
     statement={t("site.euStatement")}
     locale={locale}
     surface="dark"
   />
   ------------------------------------------------------------------------ */