namespace Chessistics.Engine.Model;

/// <summary>
/// A demand building.
///
/// Classic mode (default): counts deliveries up to <see cref="Amount"/>,
/// then <see cref="DemandState.IsSatisfied"/> stays true forever.
///
/// Recurring mode: set <see cref="ConsumptionPerTurn"/> &gt; 0. The demand
/// holds a buffer of delivered cargo; each turn it consumes that many
/// units. If the buffer runs dry it enters shortage. The demand is
/// considered satisfied once it has spent <see cref="SustainTurns"/>
/// consecutive turns without shortage.
/// </summary>
public record DemandDef(
    Coords Position,
    string Name,
    CargoType Cargo,
    int Amount,
    int Deadline = 0,
    int ConsumptionPerTurn = 0,
    int SustainTurns = 0);