namespace Outnumbered.Domain;

// Per-stat run-scoped bonus (the survival cards). Implemented engine-side by the active driver; the domain only sees
// this interface, so it stays pure. Returns 0 for any key without a bonus (and outside a survival run).
public interface IStatBonusSource
{
    double Bonus(string statKey);
}

// An immutable read of everything the pure domain math needs about one player, built at the single engine site
// (SnapshotBuilder). The domain never touches a pawn/controller — only this. Upgrades is held by reference (not copied)
// so building a snapshot per hit/tick stays allocation-free; the dictionary is treated as read-only here.
public readonly struct PlayerSnapshot
{
    public int Level { get; init; }
    public int Prestige { get; init; }
    public long Xp { get; init; }

    public int Kills { get; init; }
    public int Deaths { get; init; }
    public int HeadshotKills { get; init; }
    public int Streak { get; init; }

    public int Health { get; init; }                                // current HP (0 = no live pawn captured) — drives missing-HP (Berserk)

    public double HandicapProgress { get; init; }                   // mode progress axis, 0..1 (Gun Game ladder; 0 in TDM)
    public double HandicapFloor { get; init; }                      // monotonic escalation floor in t-space; -1 = no floor
    public double TeamDealMult { get; init; }                       // survival team card (squad-wide); 1.0 = none
    public double TeamTakeMult { get; init; }                       // survival team card (squad-wide); 1.0 = none

    public bool OverchargeActive { get; init; }                     // killstreak abilities that bend the damage chains
    public bool BerserkActive { get; init; }
    public bool AdrenalineActive { get; init; }

    public Dictionary<string, int> Upgrades { get; init; }          // permanent stat levels, by key (the PlayerData instance, by ref)
    public IStatBonusSource? Cards { get; init; }                   // run-card bonus per stat key; null outside survival
}