import debug from "debug";
const dbg = debug("upend:wasm");

export abstract class UpEndWasmExtensions {
  private initialized = false;
  private initPromise: Promise<void> | undefined = undefined;
  protected abstract _init(): Promise<void>;
  public async init(): Promise<void> {
    if (!this.initialized) {
      if (!this.initPromise) {
        this.initPromise = this._init();
      }
      await this.initPromise;
      this.initialized = true;
      dbg("WASM extensions initialized.");
    }
  }

  public abstract addr_to_components(address: string): AddressComponents;
  public abstract components_to_addr(components: AddressComponents): string;
  public abstract AddressTypeConstants: AddressTypeConstants;
}

export interface AddressTypeConstants {
  Attribute: string;
  Hash: string;
  Url: string;
  Uuid: string;
}

export interface AddressComponents {
  t: string;
  c?: string;
}