/**
 * The `companies:` frontmatter vocabulary, shared by its writer
 * (`apps/cli/sync.ts`, from the local DuckDB company-frequency database), its
 * schema (`blume.config.ts`) and its two readers: the company table under a
 * problem page's badge row (`components/ProblemBadges.astro`) and the
 * Companies section of the Appendix (`pages/appendix.astro`), where each
 * company's card — anchored at `companyHref()` — lists the problems it asked.
 * Plain data, no Astro imports: sync imports this file under Bun.
 */

/** The database's recency windows, most recent first; they nest, so a company is filed under the first it appears in. */
export const RECENCY = ["Thirty Days", "Three Months", "Six Months"] as const;
export type Recency = (typeof RECENCY)[number];

/** Read under an "Asked within" heading (the company table) or as a row chip (the Appendix card). */
export const RECENCY_LABEL: Record<Recency, string> = {
  "Thirty Days": "30 days",
  "Three Months": "3 months",
  "Six Months": "6 months",
};

export interface Company {
  name: string;
  /** The most recent window the company asked the problem in. */
  period: Recency;
  /** 5–100, relative within the company and window: 100 is its most-asked problem there. */
  frequency: number;
}

/** The company's card on the Appendix; `company-` keeps it clear of the tag cards' `#<slug>` ids. */
export function companyHref(name: string): string {
  return `/appendix#company-${name
    .toLowerCase()
    .replace(/[^a-z0-9]+/g, "-")
    .replace(/^-|-$/g, "")}`;
}