namespace BlueLaminate.Core.Tradeups;

/// <summary>
/// A skin that can come OUT of a tradeup, carrying the float bounds needed to map an
/// input average float onto this skin's own wear range. <see cref="StatTrakAvailable"/>
/// is recorded so the listing-side query (Phase C) can filter ST vs non-ST outputs;
/// the graph itself is ST-agnostic.
/// </summary>
public sealed record TradeupOutputSkin(
    int SkinId,
    string Name,
    decimal FloatMin,
    decimal FloatMax,
    bool StatTrakAvailable);

/// <summary>
/// One tradeup "recipe slot": all eligible input skins of a single rarity within one
/// collection, and the set of output skins they produce (the next rarity tier present
/// in that collection). For a single-collection contract, ten inputs are drawn from
/// <see cref="InputSkinIds"/> and each of <see cref="OutputSkins"/> is an equally likely
/// outcome, so k_C = <c>OutputSkins.Count</c>.
/// </summary>
public sealed record TradeupInputGroup(
    int CollectionId,
    string CollectionName,
    WeaponRarity InputRarity,
    WeaponRarity OutputRarity,
    IReadOnlyList<int> InputSkinIds,
    IReadOnlyList<TradeupOutputSkin> OutputSkins);

/// <summary>
/// The full tradeup reference graph derived from the static catalogue: every
/// (collection, input rarity) → (output rarity, output skins) edge that yields a
/// 10-input weapon tradeup. Built once per process from the monthly-synced catalogue
/// (see <see cref="TradeupGraphBuilder"/>); contains no pricing or listing data.
/// </summary>
public sealed record TradeupGraph(IReadOnlyList<TradeupInputGroup> Groups);