using Unity.Collections;
using Unity.Mathematics;
using Unity.NetCode;

namespace ProjectM.Simulation
{
    /// <summary>
    /// Twin-stick player input (server-authoritative, input-only clients). Gathered once per frame
    /// on the owning client in <see cref="GhostInputSystemGroup"/> and streamed to the server via
    /// AutoCommandTarget. Netcode source-gen produces InputBufferData<PlayerInput> plus the
    /// copy/apply systems from this type. The [GhostField]s let remote owners be predicted; the
    /// data replays deterministically under rollback.
    /// </summary>
    public struct PlayerInput : IInputComponentData
    {
        /// <summary>WASD / left-stick movement, normalized to roughly -1..1 per axis.</summary>
        [GhostField(Quantization = 1000)] public float2 Move;

        /// <summary>Right-stick / cursor aim direction (normalized). Zero => face movement direction.</summary>
        [GhostField(Quantization = 1000)] public float2 Aim;

        /// <summary>Primary ability fire. InputEvent survives the frame→tick→rollback boundary so a press fires exactly once.</summary>
        [GhostField] public InputEvent Fire;
        /// <summary>Dodge dash. InputEvent twin of <see cref="Fire"/>: survives the frame-tick-rollback boundary
        /// so one press dashes exactly once; read by the predicted DashSystem (MC-1).</summary>
        [GhostField] public InputEvent Dash;

        /// <summary>Active input scheme this tick (<see cref="InputSchemeId"/>: 0 = mouse/keyboard, 1 = gamepad).
        /// The server reads it so the auto-target assist applies only to gamepad shots; precise mouse aim is left
        /// exact. A byte (not an enum): it is compared inside the Burst-compiled <c>AbilityFireSystem</c>.</summary>
        [GhostField] public byte Scheme;

        public FixedString512Bytes ToFixedString()
        {
            var s = new FixedString512Bytes();
            s.Append(Move.x); s.Append(','); s.Append(Move.y); s.Append(';');
            s.Append(Aim.x); s.Append(','); s.Append(Aim.y); s.Append(';');
            s.Append(Fire.Count); s.Append(';'); s.Append(Scheme); s.Append(';'); s.Append(Dash.Count);
            return s;
        }
    }
}