/// <summary>
/// Determines whether the given change is a valid one.
/// </summary>
/// <param name="change">The change to be.</param>
/// <returns>
/// <c>true</c> if it is a valid change otherwise, <c>false</c>.
/// </returns>
public bool IsChangeValid(Change change)
{
if (Board.GetHeight(change.X, change.Y) > 1 && change.AddedLetter.Equals(Board.Letters[change.X, change.Y][Board.Letters[change.X, change.Y].Count - 2])) {
if (MessageChanged != null) {
MessageChanged(this, new MessageEventArgs("Invalid move. Adding a letter on it's equal is not allowed."));
}
return false;
}
if (change.X >= Board.Size || change.Y >= Board.Size) {
if (MessageChanged != null) {
MessageChanged(this, new MessageEventArgs("Invalid move. Letter added in overflowing coordinates"));
}
return false;
}
if (Board.GetHeight(change.X, change.Y) > 5) {
if (MessageChanged != null) {
MessageChanged(this, new MessageEventArgs("Invalid move. Can't add more than 5 letters to a cell."));
}
return false;
}
return true;
}
/// <summary>
/// Determines whether the specified <see cref="System.Object"/> is equal to this instance.
/// </summary>
/// <param name="other">The <see cref="System.Object"/> to compare with this instance.</param>
/// <returns>
/// <c>true</c> if the specified <see cref="System.Object"/> is equal to this instance; otherwise, <c>false</c>.
/// </returns>
public bool Equals(Change other)
{
return (other.X == this.X) && (other.Y==this.Y) && (other.AddedLetter==this.AddedLetter);
}
/// <summary>
/// Applies the given change to the board.
/// </summary>
/// <param name="change">The change to be applied.</param>
/// <returns>True if the change is applied succesfully, false otherwise.</returns>
public bool ApplyChange(Change change)
{
Changes.Add(change);
Players[0].UseLetter(change.AddedLetter);
return Board.AddLetter(change.X, change.Y, change.AddedLetter);
}