import type { Project } from '../model/Project';
import type { Command } from './Command';

export class RenameProjectCommand implements Command {
  readonly label = 'Rename project';
  private previous = '';

  constructor(private readonly name: string) {}

  execute(project: Project): void {
    this.previous = project.name;
    project.name = this.name;
  }

  undo(project: Project): void {
    project.name = this.previous;
  }
}

/** "Sprite", "Sprite 2", "Sprite 3" … – the first name not yet used by an asset. */
export function nextAssetName(project: Project, base: string): string {
  const taken = new Set(project.assets.map((a) => a.name));
  if (!taken.has(base)) return base;
  for (let i = 2; ; i++) {
    const candidate = `${base} ${i}`;
    if (!taken.has(candidate)) return candidate;
  }
}