namespace Chessistics.Engine.Model;

public class BoardSnapshot
{
    public int Width { get; }
    public int Height { get; }
    public CellType[,] Grid { get; }
    public IReadOnlyList<ProductionSnapshot> Productions { get; }
    public IReadOnlyList<DemandSnapshot> Demands { get; }
    public IReadOnlyList<PieceSnapshot> Pieces { get; }
    public SimPhase Phase { get; }
    public int TurnNumber { get; }
    public IReadOnlyDictionary<PieceKind, int> RemainingStock { get; }

    public BoardSnapshot(BoardState state)
    {
        Width = state.Width;
        Height = state.Height;
        Phase = state.Phase;
        TurnNumber = state.TurnNumber;

        // Deep copy grid
        Grid = new CellType[Width, Height];
        Array.Copy(state.Grid, Grid, state.Grid.Length);

        Productions = state.Productions.Values
            .Select(p => new ProductionSnapshot(p.Position, p.Name, p.Cargo, p.Interval, state.ProductionBuffers[p.Position]))
            .ToList();

        Demands = state.Demands.Values
            .Select(d => new DemandSnapshot(d.Position, d.Name, d.Cargo, d.Required, d.Deadline, d.ReceivedCount, d.IsSatisfied))
            .ToList();

        Pieces = state.Pieces
            .Select(p => new PieceSnapshot(p.Id, p.Kind, p.StartCell, p.EndCell, p.CurrentCell, p.Cargo, p.CargoFilter, p.SocialStatus))
            .ToList();

        RemainingStock = new Dictionary<PieceKind, int>(state.RemainingStock);
    }
}

public record ProductionSnapshot(Coords Position, string Name, CargoType Cargo, int Interval, CargoType? Buffer);
public record DemandSnapshot(Coords Position, string Name, CargoType Cargo, int Required, int Deadline, int ReceivedCount, bool IsSatisfied);
public record PieceSnapshot(int Id, PieceKind Kind, Coords StartCell, Coords EndCell, Coords CurrentCell, CargoType? Cargo, CargoType? CargoFilter, int SocialStatus);