using System.Collections;
using BlueWater.Audios;
using BlueWater.Interfaces;
using BlueWater.Maps;
using Sirenix.OdinInspector;
using UnityEngine;
using UnityEngine.Rendering.Universal;

namespace BlueWater
{
    public class Rockfall : DamageableProps
    {
        [Title("컴포넌트")]
        [SerializeField, Required]
        private SphereCollider _sphereCollider;

        [SerializeField, Required]
        private GameObject _visualLook;
        
        [SerializeField]
        private DecalProjector _indicator;
        
        [Title("표시기 설정")]
        [SerializeField]
        private bool _isUsingIndicator = true;
        
        [Title("충돌 설정")]
        [SerializeField]
        private LayerMask _targetLayer;
        
        [SerializeField]
        private LayerMask _groundLayer;
        
        [SerializeField, Range(0f, 5f), ShowIf("@_isUsingIndicator")]
        private float _indicatorTime = 0.5f;
        
        [SerializeField, Range(0f, 5f)]
        private float _fallTime = 0.5f;

        [SerializeField, Range(0, 5)]
        private int _attackDamage = 1;

        [SerializeField]
        private bool _isAcceleratedFall = true;
       
        [Title("Ground Crash 설정")]
        [SerializeField]
        private string _groundCrashSfxName;
       
        [SerializeField]
        private ParticleSystem _groundCrashParticle;

        private Collider[] _hitColliders;
        private RaycastHit _raycastHit;
        private Vector3 _startPosition;
        private Vector3 _endPosition;
        private bool _isAttacked;
        
        // Hashes
        private static readonly int _fillHash = Shader.PropertyToID("_Fill");

        private IEnumerator Start()
        {
            //_visualLook.SetActive(false);
            _sphereCollider.enabled = false;
            _startPosition = transform.position;
            SpawnLocation = MapManager.Instance.SandMoleMapController.ParticleInstanceLocation;
            _hitColliders = new Collider[4];
            BasicSetting();
            
            if (!Physics.Raycast(transform.position, Vector3.down, out _raycastHit, 50f, _groundLayer))
            {
                Debug.LogError("땅을 감지하지 못하는 버그");
                yield break;
            }
            _endPosition = _raycastHit.point;
            
            ShowIndicator();
            var elapsedTime = 0f;
            while (elapsedTime <= _indicatorTime)
            {
                var time = elapsedTime / _indicatorTime;
                if (_isUsingIndicator && _indicator)
                {
                    var fillValue = Mathf.Lerp(0f, 1f, time);
                    _indicator.material.SetFloat(_fillHash, fillValue);
                }
                
                // TODO : 가끔씩 공중에서 멈추는 경우?
                if (_isAcceleratedFall)
                {
                    var distance = Vector3.Distance(_startPosition, _endPosition);
                    var acceleration = 2 * distance / (_fallTime * _fallTime); // a = 2d / t^2
                    var displacement = 0.5f * acceleration * elapsedTime * elapsedTime;
                    var progress = displacement / distance;
                    transform.position = Vector3.Lerp(_startPosition, _endPosition, progress);
                }
                else
                {
                    transform.position = Vector3.Lerp(_startPosition, _endPosition, time);
                }
                
                elapsedTime += Time.deltaTime;
                
                yield return null;
            }

            transform.position = _endPosition;
            _indicator.material.SetFloat(_fillHash, 1f);
            HideIndicator();
            //_visualLook.SetActive(true);

            // if (_isAcceleratedFall)
            // {
            //     var distance = Vector3.Distance(_startPosition, _endPosition);
            //     var acceleration = 2 * distance / (_fallTime * _fallTime); // a = 2d / t^2
            //     elapsedTime = 0f;
            //
            //     while (elapsedTime <= _fallTime)
            //     {
            //         var time = elapsedTime;
            //         var displacement = 0.5f * acceleration * time * time;
            //         var progress = displacement / distance;
            //         transform.position = Vector3.Lerp(_startPosition, _endPosition, progress);
            //         elapsedTime += Time.deltaTime;
            //
            //         yield return null;
            //     }
            // }
            // else
            // {
            //     elapsedTime = 0f;
            //     while (elapsedTime <= _fallTime)
            //     {
            //         var time = elapsedTime / _fallTime;
            //         transform.position = Vector3.Lerp(_startPosition, _endPosition, time);
            //         elapsedTime += Time.deltaTime;
            //         
            //         yield return null;
            //     }
            // }
            //
            // transform.position = _endPosition;
            
            if (!string.IsNullOrEmpty(_groundCrashSfxName))
            {
                AudioManager.Instance.PlaySfx(_groundCrashSfxName);
            }

            if (_groundCrashParticle)
            {
                if (!SpawnLocation)
                {
                    Debug.LogError("파티클 위치 생성 오류");
                    yield break;
                }
                Instantiate(_groundCrashParticle, transform.position, Quaternion.identity, SpawnLocation);
            }
            
            var hitCount = Physics.OverlapSphereNonAlloc(_sphereCollider.bounds.center, _sphereCollider.radius,
                _hitColliders, _targetLayer, QueryTriggerInteraction.Collide);
            for (var i = 0; i < hitCount; i++)
            {
                var hitCollider = _hitColliders[i];
                var iDamageable = hitCollider.GetComponentInParent<IDamageable>();
                if (iDamageable == null || !iDamageable.CanDamage()) continue;
                
                iDamageable.TakeDamage(_attackDamage);
                _isAttacked = true;
            }

            if (_isAttacked)
            {
                Die();
                yield break;
            }

            _sphereCollider.enabled = true;
        }
        
        private void BasicSetting()
        {
            if (!_isUsingIndicator || !_indicator) return;
            
            _indicator.scaleMode = DecalScaleMode.InheritFromHierarchy;
            _indicator.material = new Material(_indicator.material);
            _indicator.material.SetFloat(_fillHash, 0f);
        }
        
        private void HideIndicator()
        {
            if (!_isUsingIndicator || !_indicator) return;
            
            _indicator.enabled = false;
            _indicator.material.SetFloat(_fillHash, 0);
        }
        
        private void ShowIndicator()
        {
            if (!_isUsingIndicator || !_indicator) return;
            
            _indicator.material.SetFloat(_fillHash, 0);
            _indicator.enabled = true;
        }
    }
}