export type Branding = {
  siteName: string;
  portalTitle: string;
  portalSubtitle: string;
  adminTitle: string;
  adminSubtitle: string;
  siteIconUrl: string;
  logoUrl: string;
  developerAvatarUrl: string;
  developerName: string;
  feedbackEmail: string;
};

export const defaultBranding: Branding = {
  siteName: "YMhut Box",
  portalTitle: "YMhut Box 统一服务门户",
  portalSubtitle: "统一发布、反馈与接口源状态门户",
  adminTitle: "YMhut 统一管理台",
  adminSubtitle: "发布、反馈、接口源与系统运维",
  siteIconUrl: "/assets/favicon.ico",
  logoUrl: "/assets/favicon.ico",
  developerAvatarUrl: "/assets/developer-avatar.png",
  developerName: "YMhut",
  feedbackEmail: "support@ymhut.cn",
};

function valueOf(source: unknown, key: keyof Branding) {
  const value = source && typeof source === "object" ? (source as Record<string, unknown>)[key] : undefined;
  return typeof value === "string" && value.trim() ? value.trim() : "";
}

export function normalizeBranding(source: unknown): Branding {
  const siteName = valueOf(source, "siteName") || defaultBranding.siteName;
  const siteIconUrl = valueOf(source, "siteIconUrl") || defaultBranding.siteIconUrl;
  return {
    siteName,
    portalTitle: valueOf(source, "portalTitle") || `${siteName} 统一服务门户`,
    portalSubtitle: valueOf(source, "portalSubtitle") || defaultBranding.portalSubtitle,
    adminTitle: valueOf(source, "adminTitle") || defaultBranding.adminTitle,
    adminSubtitle: valueOf(source, "adminSubtitle") || defaultBranding.adminSubtitle,
    siteIconUrl,
    logoUrl: valueOf(source, "logoUrl") || siteIconUrl,
    developerAvatarUrl: valueOf(source, "developerAvatarUrl") || defaultBranding.developerAvatarUrl,
    developerName: valueOf(source, "developerName") || defaultBranding.developerName,
    feedbackEmail: valueOf(source, "feedbackEmail") || defaultBranding.feedbackEmail,
  };
}

export function applyDocumentBranding(branding: Branding, surface: "portal" | "admin" = "admin") {
  if (typeof document === "undefined") return;
  document.title = surface === "admin" ? branding.adminTitle : branding.portalTitle;
  let icon = document.querySelector<HTMLLinkElement>("link[rel~='icon']");
  if (!icon) {
    icon = document.createElement("link");
    icon.rel = "icon";
    document.head.appendChild(icon);
  }
  icon.href = branding.siteIconUrl;
}