using System.Collections.Generic;
using Code.Infrastructure.EventBus;

namespace Code.Infrastructure.Volume
{
    public interface IVolumeService
    {
        void TryLoadVolume(VolumeId volumeId);
        void TryRemoveVolume(VolumeId volumeId);
    }

    public class VolumeService : IVolumeLoadedHandle, IVolumeService
    {
        private Dictionary<VolumeId, UnityEngine.Rendering.Volume> _loadedVolumes = new();
        private EventBus.EventBus _eventBus;
        private IVolumeFactory _factory;

        public VolumeService(EventBus.EventBus eventBus, IVolumeFactory factory)
        {
            _eventBus = eventBus;
            _eventBus.Subscribe(this);
            _factory = factory;
        }
        public void TryLoadVolume(VolumeId volumeId) => _factory.LoadVolume(volumeId);

        public void VolumeLoaded(UnityEngine.Rendering.Volume volume, VolumeId volumeId)
        {
            _loadedVolumes.Add(volumeId, volume);
            
            _eventBus.RaiseEvent<IVolumeLoaded>(ui=> ui.VolumeLoaded(volumeId));
        }

        public void TryRemoveVolume(VolumeId volumeId)
        {
            // TODO Close it
            RemoveVolume(volumeId);
        }
        
        private void RemoveVolume(VolumeId volumeId)
        {
            _factory.ReleaseVolume(_loadedVolumes[volumeId]);
            _loadedVolumes.Remove(volumeId);
        }
    }

    public interface IVolumeLoaded : IGlobalSubscriber
    {
        void VolumeLoaded(VolumeId volumeId);
    }
}