using System.Threading;
using System.Threading.Tasks;

namespace Predictalytics.Application.Interfaces;

public interface IPositionPnLEngine
{
    /// <summary>
    /// Recalculates all positions, average costs, and PnL values for a trader by re-playing their trade history.
    /// Updates the TraderPosition records in the database, calculates realized/unrealized PnL,
    /// and updates the Trader's TotalPnl and WinRate.
    /// </summary>
    Task RecalculateTraderPositionsAsync(int traderId, CancellationToken ct = default);
}