using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;

namespace MECF.Framework.Common.Account.Extends
{
	public class MenuLoader : XmlLoader
	{

		#region Variables

		private List<AppMenu> _menuList = new();

		#endregion
		
		#region Constructors

		public MenuLoader(string fileName)
			: base(fileName)
		{
		}
		
		#endregion

		#region Methods

		/// <summary>
		/// 系统中配置的菜单项目。
		/// </summary>
		public List<AppMenu> MenuList => _menuList;

		/// <inheritdoc />
		protected override void AnalyzeXml()
		{
			if (XmlDoc != null)
			{
				_menuList = TranslateMenus(XmlDoc.Root);
			}
		}

		private static List<AppMenu> TranslateMenus(XContainer pElement)
		{
			var list = new List<AppMenu>();
			var enumerable = from r in pElement.Elements("menuItem")
				select (r);
			foreach (var item in enumerable)
			{
				var menuId = "";
				var menuViewModel = "";
				var resKey = "";
				var desc = "";
				if (!item.HasElements)
				{
					menuId = item.Attribute("id").Value;
					menuViewModel = item.Attribute("viewmodel").Value;
					resKey = item.Attribute("resKey").Value;
					if (item.Attribute("Description") != null)
						desc = item.Attribute("Description").Value;
					
					var appMenu = new AppMenu(menuId, menuViewModel, resKey, null, desc);
					if (item.Attribute("System") != null)
						appMenu.System = item.Attribute("System").Value;
					if (item.Attribute("AlarmModule") != null)
						appMenu.AlarmModule = item.Attribute("AlarmModule").Value;
					list.Add(appMenu);
					continue;
				}
				menuId = item.Attribute("id").Value;
				resKey = item.Attribute("resKey").Value;
				var subMenus = new List<AppMenu>();
				subMenus = TranslateMenus(item);
				var appMenu2 = new AppMenu(menuId, menuViewModel, resKey, subMenus, desc);
				if (item.Attribute("System") != null)
					appMenu2.System = item.Attribute("System").Value;
				if (item.Attribute("AlarmModule") != null)
					appMenu2.AlarmModule = item.Attribute("AlarmModule").Value;
				list.Add(appMenu2);
			}
			return list;
		}

		#endregion
	}
}