import { CellType } from "../constants/CellType";
import { Direction } from "../constants/Direction";
import { PieceId, pieceMap } from "../constants/Pieces";
import { ExternalNode } from "./ExternalNode";
import { PlacedPiece } from "./PlacedPiece";

export class Cell {
  public readonly externalNodes: Map<Direction, ExternalNode>;
  public readonly cellType: CellType;
  public placedPiece?: {
    piece: PlacedPiece;
    id: PieceId;
  };

  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 node!;
  }

  public placePiece(pieceId: PieceId) {
    if (this.placedPiece !== undefined) return;
    this.placedPiece = {
      piece: pieceMap[pieceId].toPlacedPiece(this),
      id: pieceId,
    };
  }
}