package de.mannheim.th.chess.domain;

import java.util.List;
import java.util.stream.Collectors;

import com.github.bhlangonijr.chesslib.Board;
import com.github.bhlangonijr.chesslib.Square;
import com.github.bhlangonijr.chesslib.move.Move;
import com.github.bhlangonijr.chesslib.move.MoveList;

import de.mannheim.th.chess.utl.Clock;

/**
 * Ist die zentrale Klasse für ein einzelnes Spiel. Ist praktisch die zentrale
 * Steuerung davon.
 */
public class Game {

  private Board board;
  private Clock clockPlayer1;
  private Clock clockPlayer2;

  private MoveList movelist;

  /**
   * Conststructs a new standard GameBoard.
   */
  public Game() {
    this.board = new Board();

    this.movelist = new MoveList();

    this.clockPlayer1 = new Clock();
    this.clockPlayer2 = new Clock();

  }

  /**
   * Constructs a new standard GameBoard and applies the provides moves.
   *
   * @param movelist The list of moves that get played.
   */
  public Game(MoveList movelist) {
    this.board = new Board();

    this.movelist = movelist;

    for (Move move : movelist) {
      this.board.doMove(move);
    }

    this.clockPlayer1 = new Clock();
    this.clockPlayer2 = new Clock();
  }

  /**
   * Constructs a new GameBoard with the provided fen String as the positions.
   *
   * @param fen The fen String that provides the customs formation.
   */
  public Game(String fen) {
    this.board = new Board();
    this.board.loadFromFen(fen);

    this.movelist = new MoveList();

    this.clockPlayer1 = new Clock();
    this.clockPlayer2 = new Clock();
  }

  /**
   * Plays the move on the board and adds it to the movelist
   *
   * @param move the move to be played
   */
  public void playMove(Move move) {
    this.board.doMove(move);
    this.movelist.add(move);
  }

  /**
   * Plays the move on the board and adds it to the movelist
   *
   * @param origin     The square from wich it moves from.
   * @param desination The square where it will move to.
   */
  public void playMove(Square origin, Square desination) {
    Move move = new Move(origin, desination);
    this.board.doMove(move);
    this.movelist.add(move);
  }

  /**
   * Retrieves a list of legal moves originating from the specified square.
   *
   * @param square The square from which to retrieve legal moves.
   *
   * @return A list of legal moves that originate from the specified square.
   */
  public List<Move> getLegalMoves(Square square) {
    return this.board.legalMoves().stream()
        .filter(move -> move.getFrom() == square)
        .collect(Collectors.toList());

  }
}