using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

namespace BNG {

    public class GrabbableHighlightMaterial : GrabbableEvents {

        public bool HighlightOnGrabbable = true;
        public bool HighlightOnRemoteGrabbable = true;

        [Tooltip("Materials to assign to Renderer when not being highlighted. ")]
        public List<Material> StandardMaterials;

        [Tooltip("Materials to assign to Renderer when being highlighted")]
        public List<Material> HighlightMaterials;

        public Renderer Renderer;

        void Start() {
            if(Renderer == null) {
                Renderer = GetComponentInChildren<Renderer>();
            }

            if(StandardMaterials == null || StandardMaterials.Count == 0 && Renderer != null) {
                StandardMaterials = new List<Material>();
                foreach(var m in Renderer.materials) {
                    StandardMaterials.Add(m);
                }
            }
        }

        // Item has been grabbed by a Grabber
        public override void OnGrab(Grabber grabber) {
            UnhighlightItem();
        }

        // Fires if this is the closest grabbable but wasn't in the previous frame
        public override void OnBecomesClosestGrabbable(ControllerHand touchingHand) {
            if (HighlightOnGrabbable) {
                HighlightItem();
            }
        }

        public override void OnNoLongerClosestGrabbable(ControllerHand touchingHand) {
            if (HighlightOnGrabbable) {
                UnhighlightItem();
            }
        }

        public override void OnBecomesClosestRemoteGrabbable(ControllerHand touchingHand) {
            if (HighlightOnRemoteGrabbable) {
                HighlightItem();
            }
        }

        public override void OnNoLongerClosestRemoteGrabbable(ControllerHand touchingHand) {
            if (HighlightOnRemoteGrabbable) {
                UnhighlightItem();
            }
        }
        public void HighlightItem() {
            if (Renderer != null && HighlightMaterials != null) {
                Renderer.materials = HighlightMaterials.ToArray();
            }
        }

        public void UnhighlightItem() {
            if(Renderer != null && StandardMaterials != null) {
                Renderer.materials = StandardMaterials.ToArray();
            }
        }
    }
}