using NEG.UI.Area;
using NEG.UI.WindowSlot;
using NegUtils.NEG.UI;
using UnityEngine;

namespace NEG.UI.Window
{
    public interface IWindow : ISlotsHolder, IControllable
    {
        /// <summary>
        ///     Parent slot of this window.
        /// </summary>
        IWindowSlot Parent { get; }

        /// <summary>
        ///     Called internally by slot to open window.
        /// </summary>
        /// <param name="parentSlot">slot that opens window</param>
        /// <param name="data">data</param>
        void SetOpenedState(IWindowSlot parentSlot, object data);

        /// <summary>
        ///     Called internally to close window by slot.
        /// </summary>
        void SetClosedState();

        /// <summary>
        ///     Called internally to hide window by slot.
        /// </summary>
        void SetHiddenState();

        /// <summary>
        ///     Called internally to set window visible by slot.
        /// </summary>
        void SeVisibleState();
    }

    public static class WindowInterfaceExtensions
    {
        /// <summary>
        ///     Opens window as slot child. If slot is null or not provided, as child of current area.
        /// </summary>
        /// <param name="window">window to open</param>
        /// <param name="slot">slot to attach window</param>
        /// <param name="data">data to send to window</param>
        public static void Open(this IWindow window, IWindowSlot slot = null, object data = null)
        {
            if (slot != null)
            {
                slot.AttachWindow(window, data);
                return;
            }

            UiManager.Instance.CurrentArea.OpenWindow(window, data);
        }

        /// <summary>
        ///     Opens window as child of selected area.
        /// </summary>
        /// <param name="window">window to open</param>
        /// <param name="area">area to attach window</param>
        /// <param name="data">data to send to window</param>
        public static void Open(this IWindow window, IArea area, object data = null) => area.OpenWindow(window, data);

        /// <summary>
        ///     Open passed window as child of this window.
        /// </summary>
        /// <param name="window">parent window</param>
        /// <param name="windowToOpen">window to open</param>
        /// <param name="data">data to send to window</param>
        public static void OpenChild(this IWindow window, IWindow windowToOpen, object data = null)
        {
            if (windowToOpen == null)
            {
                Debug.LogError("Window to open cannot be null");
                return;
            }

            window.OpenWindow(windowToOpen, data);
        }

        /// <summary>
        ///     Open window as child of provided window. If <typeparamref name="parentWindow" /> is null, as child of current main
        ///     window in <see cref="UiManager" />. If there is no main window, open on current area.
        /// </summary>
        /// <param name="window">window to open</param>
        /// <param name="parentWindow">parent window</param>
        /// <param name="data">data to send to window</param>
        public static void OpenAsChild(this IWindow window, IWindow parentWindow = null, object data = null)
        {
            if (parentWindow != null)
            {
                parentWindow.OpenWindow(window, data);
                return;
            }

            if (UiManager.Instance.CurrentMainWindow != null)
            {
                UiManager.Instance.CurrentMainWindow.OpenWindow(window, data);
                return;
            }

            UiManager.Instance.CurrentArea.OpenWindow(window, data);
        }

        /// <summary>
        ///     Close window.
        /// </summary>
        /// <param name="window">window to close</param>
        public static void Close(this IWindow window) => window.Parent.DetachWindow(window);
    }
}