using Unity.Entities;
using Unity.NetCode;

namespace ProjectM.Simulation
{
    /// <summary>
    /// One owned permanent meta-upgrade tier, keyed by (class, upgrade). The CycleDirector's DynamicBuffer of these is
    /// the authoritative per-class meta-progression record. A GLOBAL <c>[GhostField]</c> buffer on the ownerless
    /// interpolated director ghost (no OwnerSendType — the party invests together and every client reads it for the
    /// shop), mirroring <see cref="StorageEntry"/>. Persisted to disk (SaveData v6) and re-applied born-correct at
    /// player spawn as meta-band <see cref="StatModifier"/>s. Bytes only (Burst/serialization safe). Sparse — an
    /// absent (class, upgrade) row means tier 0.
    /// </summary>
    [InternalBufferCapacity(24)]
    public struct MetaTierState : IBufferElementData
    {
        /// <summary>Owning class id (Warrior/Ranger — the CharacterId anchor).</summary>
        [GhostField] public byte ClassId;
        /// <summary>Upgrade id (append-only key into the meta catalog).</summary>
        [GhostField] public byte UpgradeId;
        /// <summary>Owned tier (&gt;=1; an absent row = 0).</summary>
        [GhostField] public byte Tier;
    }

    /// <summary>
    /// Server-only singleton on the CycleDirector: the FIRST-COMMIT latch for the co-op route choice. Written IN-PLACE
    /// (immediate SystemAPI.SetComponent, not a deferred ECB) inside <c>RouteSelectSystem</c>'s drain loop so two
    /// same-tick picks cannot both observe <see cref="HasPick"/>==0 (the DR-014 atomicity idiom). NOT replicated.
    /// </summary>
    public struct RouteCommand : IComponentData
    {
        /// <summary>1 once a route has been committed for the current (RunEpoch, layer).</summary>
        public byte HasPick;
        /// <summary>The committed option index (into the replicated RouteOpt* set).</summary>
        public byte OptionIndex;
        /// <summary>Run epoch the pick is for (stale-reject guard).</summary>
        public int ForRunEpoch;
        /// <summary>Layer the pick is for (stale-reject guard).</summary>
        public int ForLayer;
    }

    /// <summary>
    /// Server-only singleton on the CycleDirector: the room-exit PORTAL interact latch (DR-046). PortalInteractReceiveSystem
    /// sets <see cref="HasInteract"/> when a player interacts the portal during RoomExplore; RunDirectorSystem (the sole
    /// RunInfo/RunRuntime writer) reads it to advance the run + tear the room down, then clears it. NOT replicated.
    /// Added unconditionally at director spawn (like RouteCommand).
    /// </summary>
    public struct PortalCommand : IComponentData
    {
        /// <summary>1 once a participant has interacted the room-exit portal this RoomExplore.</summary>
        public byte HasInteract;
    }


    /// <summary>
    /// Server-only persisted meta counters on the CycleDirector (mirrored to the replicated <see cref="RunInfo"/> for
    /// the HUD). Added UNCONDITIONALLY at director spawn (like CycleRuntime/ThreatState/RunPhase) so a New-Game boot
    /// has the component the bank block reads; restored values are SetComponent'd only inside the save-present block.
    /// NOT replicated.
    /// </summary>
    public struct MetaCounters : IComponentData
    {
        public int RunsCompleted;
        public int MaxDepthReached;
    }

    /// <summary>
    /// Server-only tag of a player's class id, added at spawn by <c>GoInGameServerSystem</c>. Lets the meta systems
    /// resolve which per-class tier record to seed / spend against (class was previously only an <c>AbilityRef</c> /
    /// wire concern). NOT replicated.
    /// </summary>
    public struct PlayerClass : IComponentData
    {
        public byte ClassId;
    }
}