using System;
using Godot;
using Vector2I = Vector.Vector2I;


public interface IBoard {
    public interface IBoardOn {
        void OnInsert(object self, IPiece piece) {}
        void OnRemove(object self, IPiece piece) {}
        void OnMove(object self, MoveEventArgs args) {}

        void OnAddRecord(object self, MoveRecord record) {}
        void OnUndoRecord(object self, MoveRecord record) {}
        void OnSetPieceInteral(object self, SetPieceEventArgs args) {}
        record SetPieceEventArgs(IPiece? OldPiece, IPiece? NewPiece, Vector2I Pos);
        record MoveEventArgs(IPiece? Piece, Vector2I From, Vector2I To);
    }

    public IBoardOn? On { get; protected set; }
    public int Rows { get; }
    public int Cols { get; }

    bool IsPosOutOfRange(Vector2I pos);
    IPiece? GetPiece(Vector2I pos);
    IPiece? SetPiece(IPiece? piece, Vector2I pos);
    bool InsertPiece(IPiece piece, Vector2I pos);
    bool MovePiece(Vector2I from, Vector2I to);
    IPiece? RemovePiece(Vector2I pos);
    void Clear(bool clearRecords);
    void AddRecord(IPiece? From, IPiece? To, Vector2I FromPos, Vector2I ToPos);
    void UndoRecord();
    record MoveRecord(IPiece? From, IPiece? To, Vector2I FromPos, Vector2I ToPos);
}