import { getContext, getContextItem } from "../../lib/context.ts";
import { InputManager } from "../../lib/input.ts";
import { TrackSystem } from "../../track/system.ts";
import { Tender } from "../../train/cars.ts";
import { RedEngine } from "../../train/engines.ts";
import { Train } from "../../train/train.ts";
import { State } from "../machine.ts";
import { States } from "./index.ts";

export class RunningState extends State<States> {
  override name: States = States.RUNNING;
  override validTransitions: Set<States> = new Set([
    States.PAUSED,
    States.EDIT_TRACK,
  ]);
  override update(dt: number): void {
    const ctx = getContext() as { trains: Train[]; track: TrackSystem };
    // TODO
    // Update trains
    // Update world
    // Handle input
    // Draw (maybe via a layer system that syncs with doodler)
    ctx.track.draw();
    for (const train of ctx.trains) {
      train.move(dt);
      train.draw();
    }
    // Monitor world events
  }
  override start(): void {
    // noop
    const inputManager = getContextItem<InputManager>("inputManager");
    const track = getContextItem<TrackSystem>("track");
    const ctx = getContext() as { trains: Train[] };
    inputManager.onKey(" ", () => {
      const train = new Train(track.path, [new RedEngine(), new Tender()]);
      ctx.trains.push(train);
    });
  }
  override stop(): void {
    // noop
  }
}