const DEFAULT_BRAND_LANGUAGE = "zh";

const BRANDS = {
  zh: {
    ariaLabel: "智能星球计划品牌标识",
    titleAlt: "智能星球计划",
    titleSrc: "assets/brand/title-zh.png",
    subtitle: "现实层宇宙全息感知系统",
    description: "卫星 · 海底光缆 · 算力基础设施",
  },
  en: {
    ariaLabel: "Intelligent Planet Program brand banner",
    titleAlt: "Intelligent Planet Program",
    titleSrc: "assets/brand/title-en.png",
    subtitle: "Physical-Universe Holography",
    description: "Satellites · Cables · Compute Infra",
  },
};

function getBrandConfig(variant = DEFAULT_BRAND_LANGUAGE) {
  return BRANDS[variant] ?? BRANDS[DEFAULT_BRAND_LANGUAGE];
}

export function renderBrand(variant = DEFAULT_BRAND_LANGUAGE) {
  const config = getBrandConfig(variant);

  return `
    <div class="earth-brand earth-brand--${variant}" aria-label="${config.ariaLabel}">
      <img
        class="earth-brand__logo"
        src="assets/brand/earth-logo.png"
        alt=""
        aria-hidden="true"
        fetchpriority="high"
        loading="eager"
      >
      <div class="earth-brand__copy">
        <img
          class="earth-brand__title"
          src="${config.titleSrc}"
          alt="${config.titleAlt}"
          fetchpriority="high"
          loading="eager"
        >
        <div class="earth-brand__meta">
          <span class="earth-brand__subtitle">${config.subtitle}</span>
          <span class="earth-brand__description">${config.description}</span>
        </div>
      </div>
    </div>
  `.trim();
}

export function mountBrand(target, variant = DEFAULT_BRAND_LANGUAGE) {
  if (!target) return;
  target.innerHTML = renderBrand(variant);
}