using ProjectM.Simulation;
using Unity.Entities;
using UnityEngine;

namespace ProjectM.Authoring
{
    /// <summary>
    /// Authoring for an upgrade pickup ghost prefab: a world object that grants one stat modifier to the
    /// first player that overlaps it (server-authoritative, applied by <c>UpgradePickupSystem</c>) and
    /// then despawns. Bake the prefab as an interpolated ghost (add a GhostAuthoringComponent) so clients
    /// see it appear and despawn. <c>GetEntity(TransformUsageFlags.Dynamic)</c> gives it a world transform.
    /// </summary>
    public class UpgradePickupAuthoring : MonoBehaviour
    {
        [Tooltip("Which stat the granted modifier targets.")]
        public StatTarget Target = StatTarget.Damage;

        [Tooltip("How the granted modifier combines.")]
        public ModOp Op = ModOp.Flat;

        [Tooltip("Modifier magnitude: flat amount, or fractional percent (0.1 = +10%).")]
        public float Value = 10f;

        [Tooltip("Overlap radius (world units) for the player pickup test.")]
        [Min(0f)] public float HitRadius = 1f;

        private class UpgradePickupBaker : Baker<UpgradePickupAuthoring>
        {
            public override void Bake(UpgradePickupAuthoring authoring)
            {
                var entity = GetEntity(authoring, TransformUsageFlags.Dynamic);
                AddComponent(entity, new UpgradePickup
                {
                    Target = (byte)authoring.Target,
                    Op = (byte)authoring.Op,
                    Value = authoring.Value,
                    SourceId = 0u,
                });
                AddComponent(entity, new HitRadius { Value = authoring.HitRadius });
            }
        }
    }
}