/** Preserve the user's result choice while progressive indexing hides it briefly. */
export class ResultSelection {
  private scope: string | null = null;
  private intendedPath: string | null = null;

  begin(scope: string) {
    if (scope !== this.scope) {
      this.scope = scope;
      this.intendedPath = null;
    }
  }

  choose(path: string) {
    this.intendedPath = path;
  }

  resolve(paths: readonly string[]): number {
    if (!paths.length) return -1;
    if (this.intendedPath === null) this.intendedPath = paths[0];
    const intended = paths.indexOf(this.intendedPath);
    // A temporary fallback is presentation, not a new user choice.
    return intended >= 0 ? intended : 0;
  }
}