using NEG.UI.Area;
using NEG.UI.UnityUi.Buttons;
using NEG.UI.UnityUi.WindowSlot;
using NEG.UI.Window;
using NEG.UI.WindowSlot;
using NegUtils.NEG.UI;
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

namespace NEG.UI.UnityUi.Window
{
    public class MonoWindow : MonoBehaviour, IWindow
    {
        public event Action<object> OnOpened;
        public event Action OnClosed;
        public event Action<IControllable.BackUsed> UseBack;
        
        public IEnumerable<IWindowSlot> AvailableSlots => windowSlots;
        public IWindowSlot Parent { get; private set; }
        public IController Controller { get; }

        public bool IsMainWindow { get; private set; }
        
        private IWindowSlot DefaultWindowSlot => windowSlots[0];
        
        [SerializeField] private List<MonoWindowSlot> windowSlots;
        [SerializeField] private WindowController controller;

        [SerializeField] private GameObject defaultSelectedItem;

        public void SetOpenedState(IWindowSlot parentSlot)
        {
            gameObject.SetActive(true);
            Parent = parentSlot;
            EventSystem.current.SetSelectedGameObject(defaultSelectedItem);
            if (parentSlot.OpenWindowAsMain)
                UiManager.Instance.SetMainWindow(this);
        }

        public void SetClosedState()
        {
            gameObject.SetActive(false);
            Parent = null;
            ((ISlotsHolder)this).CloseAllWindows();
            UiManager.Instance.OnWindowClosed(this);
            if(controller != null)
                controller.OnClosed();
        }

        public void SetHiddenState() => gameObject.SetActive(false);

        public void SeVisibleState() => gameObject.SetActive(true);

        private void Awake() => ((IWindow)this).SetHiddenState();

        private void OnValidate()
        {
            if (controller == null)
                controller = GetComponent<WindowController>();
            #if !NEG_UI_DISABLE_WARNING_DEFAULT_SELECTION
            if(defaultSelectedItem == null)
                Debug.LogWarning($"Window {name} should have default selected item set");
            #endif
        }

        public void OpenWindow(IWindow window, object data = null) => DefaultWindowSlot.AttachWindow(window, data);

        public void SetDefaultSelectedItem(GameObject item) => defaultSelectedItem = item;
        
        public void FireOpenCallback(object data) => OnOpened?.Invoke(data);

        public void FireOnClosed() => OnClosed?.Invoke();
        
        public void FireUseBack(ref IControllable.BackUsed backUsed) => UseBack?.Invoke(backUsed);
    }
}