// Chessboard.cs
using System;
using Godot;

public partial class ChessBoard : Node2D {
	public VirtualBoard board = null;
	public Player playerSelf = null;

	public delegate bool ChessMoveFunc(Vector2 toPos, Vector2 fromPos);
	// public Callable chessMoveFunc { get; set; }
    public event EventHandler<Vector2> OnMouseClicked;

	public override void _Ready() {
		board = new VirtualBoard(9, 10);
		playerSelf = new Player(board);

		board.OnRemove += (sender, piece) => {
			if (piece.data != null) {
				RemoveChild(piece.data as Node);
			}
		};

		board.OnInsert += (sender, piece) => {
			if (piece.data != null) {
				AddChild(piece.data as Node);
			}
		};

		// board.OnMove += (sender, args) => {
		// 	// chessMoveFunc.Call(args.To, args.From);
		// };

		InitChessBoard();
	}
	
	public override void _Input(InputEvent @event) {
		if (@event is InputEventMouseButton mouseEvent &&
			mouseEvent.Pressed &&
			mouseEvent.ButtonIndex == MouseButton.Left) {
			// HandleMouseClick(GetGlobalTransformWithCanvas().AffineInverse() * mouseButton.Position);
			
            OnMouseClicked?.Invoke(this, GetLocalMousePosition());
		}
	}

	public void InsertNode(ChessPiece node, Vector2 arrayPos) {
		AddChild(node);
		VirtualPiece piece = node.GetVirtualPiece();
		// piece.Move(vector);
		board.SetPiecePos(piece, arrayPos);
	}

	public void InitChessBoard() {
        InitializePieces("black", 0, new[] {
        ("车", 0, 0), ("马", 1, 0), ("象", 2, 0),
		("士", 3, 0), ("将", 4, 0), ("士", 5, 0),
		("象", 6, 0), ("马", 7, 0), ("车", 8, 0),
        ("炮", 1, 2), ("炮", 7, 2),
        ("卒", 0, 3), ("卒", 2, 3), ("卒", 4, 3), ("卒", 6, 3), ("卒", 8, 3)
    	});

        InitializePieces("red", 9, new[] {
        ("车", 0, -0), ("马", 1, -0), ("象", 2, -0),
		("士", 3, -0), ("将", 4, -0), ("士", 5, -0),
		("象", 6, -0), ("马", 7, -0), ("车", 8, -0),
        ("炮", 1, -2), ("炮", 7, -2),
        ("卒", 0, -3), ("卒", 2, -3), ("卒", 4, -3), ("卒", 6, -3), ("卒", 8, -3)
    	});
    }

    private void InitializePieces(string color, int baseY, (string label, int x, int y)[] positions) {
        foreach (var (label, x, y) in positions) {
            ChessPiece piece = new ChessPiece {
                PieceLabel = label,
                LabelColor = new Color(color)
            };
            InsertNode(piece, new Vector2(x, baseY + y));
        }
    }
}