using UnityEngine;
using UnityEngine.VFX;

using RR.Game2D.Behaviour;
using RR.Game2D.Core.Managers;

namespace RR.Game2D.FX
{
    [RequireComponent(typeof(VisualEffect))]
    public class PlayerRunVFX : MonoBehaviour
    {
        [SerializeField] private VisualEffect runVFX;
        [SerializeField] private Vector2 offset = Vector2.zero;
        [SerializeField] private float requiredPlayerRunTime;

        private GameObject _player;
        private Rigidbody2D _playerRB;
        private PlayerController _playerController;
        private float _startRunTime = 0;

        private Vector3 particlesVelocityDirection;

        // Start is called once before the first execution of Update after the MonoBehaviour is created
        void Start()
        {
            _player = GameManager.Instance.PlayerObj;
            _playerRB = _player.GetComponent<Rigidbody2D>();
            _playerController = _player.GetComponent<PlayerController>();

            if (_player == null) _player = GameObject.FindGameObjectWithTag("Player");

            particlesVelocityDirection = runVFX.GetVector3("ParticlesVelocityDirection");
            runVFX.Stop();
            // runVFX.enabled = false;
        }

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

            if (_playerController.IsGrounded) transform.position = _player.transform.position
                                                                  + new Vector3(offset.x * Mathf.Sign(_playerRB.linearVelocityX), offset.y, 0f);
            else transform.position = new Vector3(_player.transform.position.x, transform.position.y, transform.position.z);

            if (!runVFX.enabled) runVFX.enabled = true;

            if (Mathf.Abs(_playerRB.linearVelocityX) >= 0.01f && _playerController.IsGrounded)
            {
                if (_startRunTime == 0) _startRunTime = Time.time;

                if (Time.time - _startRunTime < requiredPlayerRunTime) return;
                runVFX.Play();
                runVFX.SetVector3("ParticlesVelocityDirection", new Vector3(particlesVelocityDirection.x * Mathf.Sign(_playerRB.linearVelocityX),
                                                                                  particlesVelocityDirection.y,
                                                                                  particlesVelocityDirection.z));
                return;
            }
            if (_playerRB.linearVelocityY >= 0.25f * _playerController.jumpVelocity)
            {
                runVFX.SetVector3("ParticlesVelocityDirection", new Vector3(particlesVelocityDirection.x * Mathf.Sign(_playerRB.linearVelocityX),
                                                                                  _playerRB.linearVelocityY,
                                                                                  particlesVelocityDirection.z));
                runVFX.Play();
                if (_playerRB.linearVelocityX == 0) _startRunTime = 0;
                return;
            }

            _startRunTime = 0;
            runVFX.Stop();
        }
    }
}