import { bootstrapInputs } from "../../inputs.ts";
import { setContextItem } from "../../lib/context.ts";
import { InputManager } from "../../lib/input.ts";
import { ResourceManager } from "../../lib/resources.ts";
import { StraightTrack } from "../../track/shapes.ts";
import { TrackSystem } from "../../track/system.ts";
import { State } from "../machine.ts";
import { States } from "./index.ts";

export class LoadState extends State<States> {
  override name: States = States.LOAD;
  override validTransitions: Set<States> = new Set([
    States.RUNNING,
  ]);

  override update(): void {
    // noop
  }
  override start(): void {
    const track = this.loadTrack() ?? new TrackSystem([new StraightTrack()]);
    setContextItem("track", track);

    const trains = this.loadTrains() ?? [];
    setContextItem("trains", trains);

    const resources = new ResourceManager();
    setContextItem("resources", resources);

    const inputManager = new InputManager();
    setContextItem("inputManager", inputManager);

    bootstrapInputs();

    resources.set("engine-sprites", new Image());
    resources.get<HTMLImageElement>("engine-sprites")!.src =
      "/sprites/EngineSprites.png";
    resources.ready().then(() => {
      this.stateMachine.transitionTo(States.RUNNING);
    });
  }
  override stop(): void {
    // noop
  }

  private loadTrack() {
    const track = TrackSystem.deserialize(
      JSON.parse(localStorage.getItem("track") || "[]"),
    );
    return track;
  }

  private loadTrains() {
    const trains = JSON.parse(localStorage.getItem("trains") || "[]");
    return trains;
  }
}