using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

namespace Beyond {
    [RequireComponent(typeof(Renderer))]
    [ExecuteInEditMode]
    public class Portal : MonoBehaviour
    {
        public Portal secondPortal;
        public Camera camera;
        private Renderer renderer;
        private Camera mainCamera;
        public enum PortalType { PORTAL_A, PORTAL_B };
        public PortalType portalType = PortalType.PORTAL_A;
        private RenderTexture rt;
        private Material mat;
        private bool isEnabled = false;
        private GameObject player;
        public bool useMainCamera = false;

        private void Awake()
        {
            mainCamera = Camera.main;
            if (camera)
            {
                rt = new RenderTexture(512, 512, 16, RenderTextureFormat.ARGB32);
                rt.Create();
                camera.targetTexture = rt;
            }

        }

        // Start is called before the first frame update
        void Start()
        {
            renderer = GetComponent<Renderer>();
            mat = renderer.material;
            mat.SetTexture("_BaseMap", secondPortal.camera.targetTexture);
            player = GameObject.FindGameObjectWithTag("Player");
        }

        private void InitPortals()
        {
            secondPortal.portalType = (PortalType)((int)(portalType + 1) % 2);
            if (camera == null)
            {
                camera = GameObject.Instantiate<Camera>(mainCamera, this.transform);

            }

        }

        // Update is called once per frame
        void Update()
        {

#if UNITY_EDITOR
            if (!EditorApplication.isPlaying)
            {
                if (secondPortal)
                {
                    if (secondPortal.portalType == portalType)
                    {
                        InitPortals();
                    }

                }
            }
#endif
            if (Application.isPlaying)
                isEnabled = (player.transform.position - transform.position).magnitude < 10f;
            else
            {
                isEnabled = false;
            }

            if (isEnabled)
            {
                secondPortal.camera.enabled = true;

                if (useMainCamera)
                {
                    camera.transform.position = mainCamera.transform.position;
                    camera.transform.rotation = mainCamera.transform.rotation;
                }
                secondPortal.camera.transform.localPosition = camera.transform.localPosition;
                secondPortal.camera.transform.localRotation = camera.transform.localRotation;

                //secondPortal.camera.transform.localPosition =  transform.InverseTransformPoint(mainCamera.transform.position);
                //secondPortal.camera.transform.localRotation = Quaternion.Inverse(transform.rotation) * mainCamera.transform.rotation;      
            }
            else
            {
                secondPortal.camera.enabled = false;
            }
        }
    }
}