import { CellType } from "../constants/CellType";
import { Direction } from "../constants/Direction";
import { ExternalNode } from "./ExternalNode";

export class Cell {
  public readonly externalNodes: Map<Direction, ExternalNode>;
  public readonly cellType: CellType;

  constructor(cellType: CellType) {
    this.externalNodes = new Map([
      [Direction.NORTH, new ExternalNode(this, Direction.NORTH)],
      [Direction.SOUTH, new ExternalNode(this, Direction.SOUTH)],
      [Direction.EAST, new ExternalNode(this, Direction.EAST)],
      [Direction.WEST, new ExternalNode(this, Direction.WEST)],
    ]);
    this.cellType = cellType;
  }

  public getNodeAt(direction: Direction): ExternalNode {
    const node = this.externalNodes.get(direction);
    if (!node) throw Error(`Could not find node at ${direction}`);
    return this.externalNodes.get(direction) as ExternalNode;
  }
}