using ProjectI.Combat;
using UnityEngine;
namespace ProjectI.Runs
{
    /// <summary>Accepted foot/body volume, bounded sweep and solid-world visibility. Warps never create swept pickups.</summary>
    public static class CorePickupRules
    {
        public const float Radius = 2;
        public const float MaximumSweep = 12;
        private static readonly int WorldMask = ~LayerMask.GetMask("Players", "CombatTargets");
        public static bool TryCandidate(Vector3 previous, Vector3 current, Vector3 core, bool continuous, out Vector3 bodyOrigin)
        {
            bodyOrigin = current + Vector3.up;
            if (!Finite(previous) || !Finite(current) || !Finite(core)) return false;
            Vector3 segment = current - previous;
            if (!continuous || segment.sqrMagnitude > MaximumSweep * MaximumSweep) previous = current;
            segment = current - previous;
            float horizontalSquared = segment.x * segment.x + segment.z * segment.z;
            float t = horizontalSquared > .0001f ? Mathf.Clamp01(((core.x - previous.x) * segment.x + (core.z - previous.z) * segment.z) / horizontalSquared) : 1;
            Vector3 foot = previous + segment * t;
            bodyOrigin = foot + Vector3.up;
            float vertical = core.y - foot.y;
            Vector3 delta = core - foot; delta.y = 0;
            return vertical >= -.25f && vertical <= 2.25f && delta.sqrMagnitude <= Radius * Radius;
        }
        public static bool IsVisible(Vector3 origin, Vector3 point, RaycastHit[] hits)
        {
            if (!Finite(origin) || !Finite(point) || hits == null || hits.Length == 0) return false;
            Vector3 delta = point - origin;
            if (delta.sqrMagnitude < .000001f) return true;
            int count = Physics.RaycastNonAlloc(origin, delta.normalized, hits, delta.magnitude,
                WorldMask, QueryTriggerInteraction.Ignore);
            if (count == hits.Length) return false;
            for (int i = 0; i < count; i++)
                if (hits[i].collider != null && hits[i].collider.GetComponentInParent<PrototypePlayerVitals>() == null) return false;
            return true;
        }
        private static bool Finite(Vector3 v) => !float.IsNaN(v.x) && !float.IsInfinity(v.x) && !float.IsNaN(v.y) && !float.IsInfinity(v.y) && !float.IsNaN(v.z) && !float.IsInfinity(v.z);
    }
}