import { ChessPiece } from "./chess_piece.js";

import * as SQUARE from './square_methods.js';

export class Rook extends ChessPiece {

/**

* Pawn constructor

* @param {string} pieceID

* @param {string} location

* @param {string} image

*/

constructor(pieceID, location, image) {

super(pieceID, location, image);

}

/**

*

* @param {string} target the square we want to move to

* @param {Set<string>} occSet the set of squares which are occupied

* @returns true if we can move to the target

* @returns false otherwise

*/

canMove(target, occSet) {

if (super.canMove(target, occSet)) { //ask the parent class

return this.canMove2(target, occSet);//ask the rook's specific rules for movement

}

//else super says no, you cannot move there

return false;

}

/**

* helper function for the canMove function that can be unit tested since it doesn't use the DOM

* @param {string} target the square we want to move to

* @param {Set<string>} occSet a set containing the occupied squares

* @returns true if the knight is allowed to move there

* @returns false, with an error string otherwise

*/

canMove2(target, occSet) {

const cardinalDir = SQUARE.isPathCardinal(this.location, target);

if (cardinalDir <= 0) { //if the direction is NOT cardinal

this.setFeedback('The rook must move in a cardinal direction: North, East, South, or West');

return false;

}

//else path is cardinal

const path = SQUARE.calcPathCardinal(this.location, target, cardinalDir);//get the path

return this.validatePath(path, occSet);//validate the path

}

}