import type { TrackingCode } from "./payload";

// Klaro's own config shape (kiprotect/klaro, see node_modules/klaro's
// dist/config.js for the fully-annotated reference) — only the fields we
// actually set are typed here, not Klaro's full surface.
export type KlaroConfig = {
  version: number;
  elementID: string;
  styling: Record<string, string | string[]>;
  storageMethod: "cookie";
  cookieName: string;
  cookieExpiresAfterDays: number;
  default: boolean;
  mustConsent: boolean;
  acceptAll: boolean;
  hideDeclineAll: boolean;
  noticeAsModal: boolean;
  translations: Record<string, Record<string, unknown>>;
  services: {
    name: string;
    title: string;
    purposes: string[];
    required: boolean;
    default: boolean;
    onlyOnce: boolean;
    callback: (consent: boolean) => void;
  }[];
};

export function serviceName(code: TrackingCode): string {
  return `tracking-code-${code.id}`;
}

function providerTitle(code: TrackingCode): string {
  switch (code.provider) {
    case "google-analytics":
      return "Google Analytics";
    case "facebook-pixel":
      return "Facebook Pixel";
    case "google-tag-manager":
      return "Google Tag Manager";
    default:
      return "Sonstiges Tracking-Skript";
  }
}

// `onAccept` is threaded in rather than importing loadTrackingCode.ts
// directly here — this module only builds a plain config object (no DOM
// access), kept separate from the actual script-injection side effect so
// it stays trivially testable/reusable if the loading mechanism ever
// changes.
export function buildKlaroConfig(codes: TrackingCode[], onAccept: (code: TrackingCode) => void): KlaroConfig {
  const serviceTranslations: Record<string, { title: string }> = {};
  for (const code of codes) serviceTranslations[serviceName(code)] = { title: providerTitle(code) };

  return {
    version: 1,
    elementID: "klaro",
    // 'light' + 'bottom' + 'left' — a compact corner notice (Klaro's own
    // default max-width, ~400px), not a full-width bar. 'wide' (tried
    // first) stretched it across nearly the whole viewport, which read as
    // too dominant compared to a typical bottom-left corner CMP.
    // Extra keys beyond `theme` override individual CSS custom properties
    // (Klaro's injectStyles() applies any non-'theme' `styling` key as a
    // `--<key>` var, see node_modules/klaro's own utils/styling.js) — this
    // is the actual brand-color pass: dark1/light1 are (confusingly
    // named) the notice's background/text colors, not a dark-mode toggle;
    // green1 colors the accept button, red1 the decline button (set
    // neutral gray, not alarming red — this site's own secondary buttons
    // are plain-bordered, never red, see NotifyMeForm.tsx).
    styling: {
      theme: ["light", "bottom", "left"],
      dark1: "#fffdf8", // --color-bg-paper — notice/modal background
      dark2: "#e5e0d8", // --color-border
      dark3: "#f3efe9",
      light1: "#1a1a18", // --color-text-primary — notice/modal text
      light2: "#6b6b69", // --color-text-muted
      light3: "#1a1a18",
      green1: "#f6a701", // --color-brand — accept button
      green2: "#d99000",
      red1: "#e5e0d8", // decline button — neutral bordered look, not red
      red2: "#d1cabf",
      "button-text-color": "#1a1a18",
      "border-radius": "10px",
      "border-width": "1px",
      "font-family": "inherit",
      "notice-max-width": "380px",
    },
    storageMethod: "cookie",
    cookieName: "klaro-consent",
    cookieExpiresAfterDays: 180,
    default: false,
    mustConsent: false,
    acceptAll: true,
    hideDeclineAll: false,
    noticeAsModal: false,
    translations: {
      de: {
        consentModal: {
          title: "Cookie-Einstellungen",
          description: "Hier kannst du einsehen und anpassen, welche Cookies/Skripte diese Seite verwendet.",
        },
        consentNotice: {
          description: "Wir nutzen Cookies, um diese Seite zu betreiben und ihre Nutzung zu verstehen.",
          learnMore: "Einstellungen",
        },
        purposes: {
          necessary: "Notwendig",
          analytics: "Analyse",
          marketing: "Marketing",
        },
        ...serviceTranslations,
      },
    },
    services: codes.map((code) => ({
      name: serviceName(code),
      title: providerTitle(code),
      purposes: [code.consentCategory],
      required: code.consentCategory === "necessary",
      default: code.consentCategory === "necessary",
      // A restock/page-reload shouldn't re-fire the loader for a service
      // the visitor already accepted in an earlier session within this
      // same page load — Klaro still calls `callback` once per accepted
      // service per page load either way, `onlyOnce` just governs repeat
      // toggling within one session.
      onlyOnce: true,
      callback: (consent: boolean) => {
        if (consent) onAccept(code);
      },
    })),
  };
}