using System.Collections.Generic;
using Unity.CharacterController;
using Unity.Entities;
using Unity.NetCode;

namespace ProjectM.Simulation
{
    /// <summary>
    /// Ghost-variant registration for the kinematic character (M5b). <see cref="CharacterInterpolation"/> is
    /// presentation-only fixed-step smoothing that must exist ONLY on predicted clients: on the server it
    /// would interfere with LocalToWorld, and on interpolated remote ghosts it would double up with netcode's
    /// own snapshot interpolation. <c>BakeCharacter</c> adds it to every prefab version, so we force it
    /// predicted-client-only here.
    /// <para>
    /// We deliberately do NOT override the default variants for <c>LocalTransform</c> or
    /// <c>PhysicsVelocity</c> (the CC sample's DontSerializeVariant on LocalTransform is global and would
    /// break the non-character ghosts in this project — projectiles, dummies, pickups — which rely on stock
    /// LocalTransform replication). The character's position therefore replicates via the normal
    /// owner-predicted LocalTransform path, like every other ghost.
    /// </para>
    /// </summary>
    public sealed partial class CharacterGhostVariantsSystem : DefaultVariantSystemBase
    {
        protected override void RegisterDefaultVariants(Dictionary<ComponentType, Rule> defaultVariants)
        {
            defaultVariants.Add(typeof(CharacterInterpolation), Rule.ForAll(typeof(CharacterInterpolation_GhostVariant)));
        }
    }

    [GhostComponentVariation(typeof(CharacterInterpolation))]
    [GhostComponent(PrefabType = GhostPrefabType.PredictedClient)]
    public struct CharacterInterpolation_GhostVariant
    {
    }
}