export interface SettingRow {
  key: string;
  value: string;
}

export type SettingsFetcher = () => Promise<SettingRow[]>;

/**
 * Mirrors Laravel's App\Services\SettingsService: loads the whole
 * website_settings table into a key->value map, caches it in-process,
 * and reads with a default fallback. Booleans are stored as '1'/'0'.
 */
export class SettingsService {
  private cache: Map<string, string> | null = null;

  constructor(private readonly fetcher: SettingsFetcher) {}

  private async load(): Promise<Map<string, string>> {
    if (this.cache === null) {
      const rows = await this.fetcher();
      this.cache = new Map(rows.map((r) => [r.key, r.value]));
    }
    return this.cache;
  }

  async get(key: string, def: string | null = null): Promise<string | null> {
    const map = await this.load();
    return map.has(key) ? (map.get(key) as string) : def;
  }

  async getBool(key: string, def = false): Promise<boolean> {
    const map = await this.load();
    if (!map.has(key)) return def;
    const v = (map.get(key) as string).toLowerCase();
    return v === "1" || v === "true";
  }

  clear(): void {
    this.cache = null;
  }
}