using System.Collections;
using BlueWest.Collections;
using BlueWest.Coroutines;
using BlueWest.Tools;

namespace BlueWest.Core.ComponentSystem
{
    public class Component
    {
        protected readonly EventManager _eventManager;

        public bool IsActive { get; private set; } = true;
        
        private readonly FastDictionary<int, IEnumerator> _coroutines = new FastDictionary<int, IEnumerator>(10000);

        private int _coroutineCount = 0;

        public Component(EventManager eventManager)
        {
            _eventManager = eventManager;
        }
        
        public void StartCoroutine(IEnumerator routine)
        {
            _coroutines.Add(_coroutineCount, routine);
            _coroutineCount++;
        }

        public void HandleCoroutines()
        {
            for (var i = 0; i < _coroutineCount; i++)
            {
                var yielded = _coroutines[i].Current is CustomYieldInstruction yielder && yielder.MoveNext();

                if (yielded || _coroutines[i].MoveNext()) continue;
                _coroutines.Remove(i);
                _coroutineCount--;
                i--;
            }
        }

        public void EveryFrame(double delta)
        {
            if (!IsActive) return;
            Update(delta);
            HandleCoroutines();
        }

        public virtual void Update(double delta) { }
        
        public virtual void Start() { }
    }
}