using GameModel;

namespace GameHandler
{
    public class ThrowHandler
    {
        public ThrowState Init(ThrowMode throwMode, int ThrowsPerRound)
        {
            var picture = PinPicture.Create();

            return new ThrowState(new BoardState(throwMode, picture), ThrowsPerRound, 0);
        }

        /// <summary>
        /// Bild stellen
        /// </summary>
        /// <param name="boardstate"></param>
        /// <param name="throwMode"></param>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        public ThrowState SetBoardstatePicture(PinPicture boardstate, ThrowMode throwMode) 
        { 
            throw new NotImplementedException();
        }

        /// <summary>
        /// neu autstellen
        /// </summary>
        /// <param name="currentState"></param>
        /// <param name="pinThrow"></param>
        /// <returns></returns>
        public ThrowState Update(ThrowState throwState, PinThrow pinThrow)
        {
            var resetBoard = throwState.ThrowCount + 1 == throwState.ThrowsPerRount;
            var newBoardState = UpdateBoardState(throwState, pinThrow, resetBoard);
            var throwCount = resetBoard ? 0 : throwState.ThrowCount + 1;

            return throwState with {  BoardState = newBoardState, ThrowCount = throwCount };
        }

        private static BoardState UpdateBoardState(ThrowState throwState, PinThrow pinThrow, bool resetBoard)
        {
            var boardState = throwState.BoardState;
            if (boardState.ThrowMode == ThrowMode.Reposition)
            {
                return boardState with { PinPicture = PinPicture.Create() };
            }
            else
            {
                var result = boardState with { PinPicture = boardState.PinPicture + pinThrow };
                if (result.PinPicture.UpCount == 0 || resetBoard)
                {
                    return boardState with { PinPicture = PinPicture.Create() };
                }
                else
                {
                    return result;
                }
            }
        }
    }
}