using UnityEngine;

namespace IsoTools.Internal {
    public class IsoFakeObject : MonoBehaviour {

        IsoObject _isoObject    = null;
        Vector3   _lastPosition = Vector3.zero;

        public void Init(IsoObject iso_object) {
            _isoObject         = iso_object;
            _lastPosition      = iso_object.position;
            transform.position = iso_object.position;
        }

        public IsoObject isoObject {
            get { return _isoObject; }
        }

        void FixLayers() {
            var iso_object_layer = isoObject.gameObject.layer;
            if ( gameObject.layer != iso_object_layer ) {
                gameObject.layer = iso_object_layer;
                for ( int i = 0, e = transform.childCount; i < e; ++i ) {
                    var child = transform.GetChild(i);
                    child.gameObject.layer = iso_object_layer;
                }
            }
        }

        void FixedUpdate() {
            FixLayers();
            if ( !IsoUtils.Vec3Approximately(_lastPosition, isoObject.position) ) {
                _lastPosition = transform.position = isoObject.position;
            } else if ( !IsoUtils.Vec3Approximately(_lastPosition, transform.position) ) {
                _lastPosition = isoObject.position = transform.position;
            }
        }

        void OnTriggerEnter(Collider collider) {
            isoObject.gameObject.SendMessage(
                "OnIsoTriggerEnter",
                IsoUtils.IsoConvertCollider(collider),
                SendMessageOptions.DontRequireReceiver);
        }

        void OnTriggerExit(Collider collider) {
            isoObject.gameObject.SendMessage(
                "OnIsoTriggerExit",
                IsoUtils.IsoConvertCollider(collider),
                SendMessageOptions.DontRequireReceiver);
        }

        void OnCollisionEnter(Collision collision) {
            isoObject.gameObject.SendMessage(
                "OnIsoCollisionEnter",
                new IsoCollision(collision),
                SendMessageOptions.DontRequireReceiver);
        }

        void OnCollisionExit(Collision collision) {
            isoObject.gameObject.SendMessage(
                "OnIsoCollisionExit",
                new IsoCollision(collision),
                SendMessageOptions.DontRequireReceiver);
        }
    }
}