using NEG.UI.UnityUi.WindowSlot;
using NEG.UI.Window;
using System.Collections.Generic;
using System.Linq;

namespace NegUtils.NEG.UI.UnityUi.WindowSlot
{
    public class SingleWindowSlotWithHistory : MonoWindowSlot
    {
        public IWindow CurrentWindow
        {
            get => currentWindow;
            set
            {
                if (value == null)
                {
                    CloseAllWindows();
                    return;
                }
                
                currentWindow?.SetHiddenState();
                currentWindow = value;
                windowsHistory.Add(currentWindow);
                currentWindow?.SetOpenedState(this);
            }
        }
        
        private IWindow currentWindow;

        private readonly List<IWindow> windowsHistory = new List<IWindow>();

        public override void AttachWindow(IWindow window) => CurrentWindow = window;

        public override void DetachWindow(IWindow window)
        {
            if(window == null) 
                return;
            window.SetClosedState();
            windowsHistory.Remove(window);
            if (window != currentWindow || windowsHistory.Count == 0) return;
            windowsHistory[^1].SeVisibleState();
            currentWindow = windowsHistory[^1];
        }
        public override void CloseAllWindows()
        {
            currentWindow = null;
            foreach (var window in windowsHistory)
            {
                window.SetClosedState();
            }
            windowsHistory.Clear();
        }
    }
}