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

namespace ProjectM.Authoring
{
    /// <summary>
    /// MC-2 — authoring for the hostile Spitter projectile prefab (an ownerless INTERPOLATED ghost, duplicated from an
    /// existing interpolated ghost so the GhostAuthoringComponent comes free). Bakes <see cref="EnemyProjectile"/> with
    /// the spit's default Speed/Damage/Range; the firing Spitter OVERRIDES Direction + Speed + Damage + Region at spawn
    /// and ADDS the <c>RegionTag</c> (so this prefab MUST NOT bake RegionTag — AddComponent would throw on a baked one).
    /// NO Health (so it is invisible to every player hit-test) and NO <c>[GhostField]</c> beyond the stock LocalTransform.
    /// </summary>
    public class EnemyProjectileAuthoring : MonoBehaviour
    {
        [Min(0f), Tooltip("Default muzzle speed (the firing Spitter overrides this per-variant).")]
        public float Speed = 11f;

        [Min(0f), Tooltip("Default damage (the firing Spitter overrides this from its AttackDamage).")]
        public float Damage = 8f;

        [Min(0f), Tooltip("Max travel distance before the spit expires (world units).")]
        public float Range = 16f;

        private class EnemyProjectileBaker : Baker<EnemyProjectileAuthoring>
        {
            public override void Bake(EnemyProjectileAuthoring authoring)
            {
                var entity = GetEntity(authoring, TransformUsageFlags.Dynamic);
                AddComponent(entity, new EnemyProjectile
                {
                    Speed = authoring.Speed,
                    Damage = authoring.Damage,
                    Range = authoring.Range,
                    Direction = new float2(0f, 1f),
                    DistanceTravelled = 0f,
                    LastStep = 0f,
                    Region = 0,
                });
            }
        }
    }
}