import { collisionLayersOf } from '../model/collisionLayers';
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;
  }
}

/**
 * The named collision layers of the project (#152). Colliders name a layer by number, so removing
 * one shifts what every collider below it points at – which is why the dialog only ever hands over
 * a whole list, and why the list is read through `collisionLayersOf` here as well.
 */
export class SetCollisionLayersCommand implements Command {
  readonly label = 'Collision layers';
  private previous: string[] = [];

  constructor(private readonly names: readonly string[]) {}

  execute(project: Project): void {
    this.previous = project.collisionLayers;
    project.collisionLayers = collisionLayersOf({ collisionLayers: this.names });
  }

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