namespace Shogi.Api.Repositories.Dto.SessionState;

public class SessionStateDocument
{
	public long Id { get; set; }

	public Dictionary<string, Piece?> Board { get; set; }

	public WhichPiece[] Player1Hand { get; set; }

	public WhichPiece[] Player2Hand { get; set; }

	public WhichPlayer? PlayerInCheck { get; set; }

	public WhichPlayer WhoseTurn { get; set; }

	public bool IsGameOver { get; set; }

	public string DocumentVersion { get; set; } = "1";

	public SessionStateDocument() { }
	public SessionStateDocument(Domain.ValueObjects.BoardState boardState)
	{
		this.Board = boardState.State.ToDictionary(
			kvp => kvp.Key,
			kvp => kvp.Value == null ? null : new Piece(kvp.Value));

		this.Player1Hand = boardState.Player1Hand
			.Select(piece => Map(piece.WhichPiece))
			.ToArray();

		this.Player2Hand = boardState.Player2Hand
			.Select(piece => Map(piece.WhichPiece))
			.ToArray();

		this.PlayerInCheck = boardState.InCheck.HasValue
			? Map(boardState.InCheck.Value)
			: null;

		this.IsGameOver = boardState.IsCheckmate;
	}


	static WhichPiece Map(Domain.ValueObjects.WhichPiece whichPiece)
	{
		return whichPiece switch
		{
			Domain.ValueObjects.WhichPiece.Bishop => WhichPiece.Bishop,
			Domain.ValueObjects.WhichPiece.GoldGeneral => WhichPiece.GoldGeneral,
			Domain.ValueObjects.WhichPiece.King => WhichPiece.King,
			Domain.ValueObjects.WhichPiece.SilverGeneral => WhichPiece.SilverGeneral,
			Domain.ValueObjects.WhichPiece.Rook => WhichPiece.Rook,
			Domain.ValueObjects.WhichPiece.Knight => WhichPiece.Knight,
			Domain.ValueObjects.WhichPiece.Lance => WhichPiece.Lance,
			Domain.ValueObjects.WhichPiece.Pawn => WhichPiece.Pawn,
			_ => throw new NotImplementedException()
		};
	}

	static WhichPlayer Map(Domain.ValueObjects.WhichPlayer whichPlayer)
	{
		return whichPlayer switch
		{
			Domain.ValueObjects.WhichPlayer.Player1 => WhichPlayer.Player1,
			Domain.ValueObjects.WhichPlayer.Player2 => WhichPlayer.Player2,
			_ => throw new NotImplementedException()
		};
	}
}