using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using KairoEngine.Core;
using Shapes;

namespace KairoEngine.Grids
{

    public class BuildingGhost : MonoBehaviour {

        private Transform visual;
        private PlacedObjectType placedObjectTypeSO;

        private void Start() {
            RefreshVisual();
            GenericEvents.StartListening("OnSelectedChanged", OnSelectedChanged);
        }

        private void OnDisable()
        {
            GenericEvents.StopListening("OnSelectedChanged", OnSelectedChanged);
        }

        private void OnSelectedChanged() {
            RefreshVisual();
        }

        private void LateUpdate() {
            Vector3 targetPosition = GridBuildingSystem.Instance.GetMouseWorldSnappedPosition();
            //targetPosition.y = 1f;
            transform.position = Vector3.Lerp(transform.position, targetPosition, Time.deltaTime * 15f);
            transform.rotation = Quaternion.Lerp(transform.rotation, GridBuildingSystem.Instance.GetPlacedObjectRotation(), Time.deltaTime * 15f);
            if(GridBuildingSystem.buildingToolAvailable) visual.gameObject.SetActive(true);
            else visual.gameObject.SetActive(false);
        }

        private void RefreshVisual() {
            if (visual != null) {
                Destroy(visual.gameObject);
                visual = null;
            }
            PlacedObjectType placedObjectTypeSO = GridBuildingSystem.Instance.GetPlacedObjectTypeSO();
            if (placedObjectTypeSO != null) {
                visual = Instantiate(placedObjectTypeSO.visual, Vector3.zero, Quaternion.identity);
                visual.parent = transform;
                visual.localPosition = Vector3.zero;
                visual.localEulerAngles = Vector3.zero;
                SetLayerRecursive(visual.gameObject, 11);
            }
        }

        private void SetLayerRecursive(GameObject targetGameObject, int layer) {
            targetGameObject.layer = layer;
            foreach (Transform child in targetGameObject.transform) {
                SetLayerRecursive(child.gameObject, layer);
            }
        }

    }
}