RunRunRunP/Assets/Code/GameplayServices/PassingObjectsManager.cs

using System;
using System.Collections.Generic;
using Alchemy.Inspector;
using Code.PassingObjects;
using UnityEngine;
using Random = UnityEngine.Random;

namespace Code.GameplayServices
{
    public class PassingObjectsManager : MonoBehaviour
    {
        [TabGroup("Spawn")] [SerializeField] private List<Transform> spawnPoints;
        [TabGroup("Spawn")] [SerializeField] private List<GameObject> prefabs;

        [TabGroup("Gameplay")] [SerializeField]
        private float behindPlayerThreshold;

        [TabGroup("Gameplay")] [SerializeField]
        private float obstacleCooldown;

        [TabGroup("Gameplay")] [SerializeField]
        private List<PassingObjectsPreset> obstaclesPresets;

        private List<GameObject> _spawnedObjects = new();
        public float BehindPlayerThreshold => behindPlayerThreshold;
        public static PassingObjectsManager Instance { get; private set; }

        private void Awake()
        {
            Instance = this;
        }

        public void ResetObjects()
        {
            foreach (var spawnedObject in _spawnedObjects)
            {
                Destroy(spawnedObject);
            }
            _spawnedObjects.Clear();
            _timer = 0f;
        }
        public void KillChild(PassingObject child)
        {
            if (!_spawnedObjects.Contains(child.gameObject)) return;

            _spawnedObjects.Remove(child.gameObject);
            Destroy(child.gameObject);
        }

        private float _timer;

        private void Update()
        {
            if(GameplayManager.Instance.OnPause) return;
            
            _timer += Time.deltaTime;

            if (!(_timer > obstacleCooldown)) return;

            _timer = 0f;

            if (prefabs.Count == 0 && obstaclesPresets.Count > 0) return;

            var presetId = Random.Range(0, obstaclesPresets.Count);

            _spawnedObjects.Add(
                Instantiate(
                    prefabs[obstaclesPresets[presetId].prefabId1],
                    spawnPoints[0].position,
                    spawnPoints[0].rotation));
            _spawnedObjects.Add(
                Instantiate(
                    prefabs[obstaclesPresets[presetId].prefabId2],
                    spawnPoints[1].position,
                    spawnPoints[1].rotation));
            _spawnedObjects.Add(
                Instantiate(
                    prefabs[obstaclesPresets[presetId].prefabId3],
                    spawnPoints[2].position,
                    spawnPoints[2].rotation));
        }
    }

    [Serializable]
    public class PassingObjectsPreset
    {
        public int prefabId1;
        public int prefabId2;
        public int prefabId3;
    }
}