import fs from 'node:fs';

export interface Brand {
  id: string;
  title: string;
  category: string;
  aliases: string[];
}

/** Archify's built-in brand marks, read from brand-marks/catalog.json. */
export function loadBrandCatalog(file: string): Brand[] {
  const catalog = JSON.parse(fs.readFileSync(file, 'utf8')) as { marks?: Partial<Brand>[] };
  return (catalog.marks ?? [])
    .filter((mark): mark is Partial<Brand> & { id: string } => typeof mark.id === 'string')
    .map((mark) => ({ id: mark.id, title: mark.title ?? mark.id, category: mark.category ?? '', aliases: mark.aliases ?? [] }));
}

export interface BrandValue {
  /** What has been typed of the value so far. */
  typed: string;
}

/**
 * Whether the text before the cursor ends inside a `brand` value:
 * `brand: post` or `{ id: db, brand: "post` in YAML, `"brand": "post` in JSON.
 */
export function brandValueAt(linePrefix: string, format: 'yaml' | 'json'): BrandValue | undefined {
  const match =
    format === 'yaml'
      ? /(?:^|[\s{,])brand:\s*["']?([\w.-]*)$/.exec(linePrefix)
      : /"brand"\s*:\s*"([\w.-]*)$/.exec(linePrefix);
  return match ? { typed: match[1] } : undefined;
}