using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace DDD
{
    public class UiManager : Singleton<UiManager>, IManager, IEventHandler<OpenPopupUiEvent>, IEventHandler<ClosePopupUiEvent>
    {
        private readonly Dictionary<Type, PopupUi> _popupUIs = new();

        private readonly object _uiPauseRequester = new();

        public void PreInit()
        {
            EventBus.Register<OpenPopupUiEvent>(this);
            EventBus.Register<ClosePopupUiEvent>(this);
        }
        
        public Task Init()
        {
            return Task.CompletedTask;
        }

        public void PostInit()
        {
            
        }

        private void OnDestroy()
        {
            EventBus.Unregister<OpenPopupUiEvent>(this);
            EventBus.Unregister<ClosePopupUiEvent>(this);
        }

        public void RegisterPopupUI(PopupUi ui)
        {
            var type = ui.GetType();
            _popupUIs.TryAdd(type, ui);
        }

        public void UnregisterPopupUI(PopupUi ui)
        {
            var type = ui.GetType();
            if (_popupUIs.TryGetValue(type, out var registered) && registered == ui)
            {
                _popupUIs.Remove(type);
            }
        }

        public void Invoke(OpenPopupUiEvent evt)
        {
            if (_popupUIs.TryGetValue(evt.UiType, out var popup))
            {
                popup.Open();

                if (popup.IsBlockingTime)
                {
                    var timeScaleChangeEvent = GameEvents.RequestTimeScaleChangeEvent;
                    timeScaleChangeEvent.Requester = popup;
                    timeScaleChangeEvent.NewTimeScale = 0f;
                    EventBus.Broadcast(timeScaleChangeEvent);
                }
            }
        }

        public void Invoke(ClosePopupUiEvent evt)
        {
            if (_popupUIs.TryGetValue(evt.UiType, out var popup))
            {
                popup.Close();

                if (popup.IsBlockingTime)
                {
                    var timeScaleChangeEvent = GameEvents.RequestTimeScaleChangeEvent;
                    timeScaleChangeEvent.Requester = popup;
                    timeScaleChangeEvent.NewTimeScale = 1f;
                    EventBus.Broadcast(timeScaleChangeEvent);
                }
            }
        }
    }
}