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

using Abp.Application.Navigation;
using Abp.Dependency;
using Abp.Domain.Repositories;
using Abp.Localization;

using IwbZero;

using WePlatform.Authorization;
using WePlatform.BaseInfo;
using WePlatform.Configuration;

namespace WePlatform
{
    /// <summary>
    /// This class defines menus for the application.
    /// It uses ABP's menu system.
    /// When you add menu items here, they are automatically appear in angular application.
    /// See Views/Layout/_TopMenu.cshtml file to know how to render menu.
    /// </summary>
    public class WePlatformNavigationProvider : NavigationProvider
    {
        protected readonly IIocManager IocManager;

        public WePlatformNavigationProvider(IIocManager iocManager)
        {
            IocManager = iocManager;
        }

        public void Refresh(INavigationProviderContext context)
        {
            var itemNames = context.Manager.MainMenu.Items.Select(a => a.Name);
            foreach (var name in itemNames)
            {
                context.Manager.MainMenu.RemoveItem(name);
            }

            SetNavigation(context);
        }

        public override void SetNavigation(INavigationProviderContext context)
        {
            using (var funRepository = IocManager.ResolveAsDisposable<IRepository<SysFunction>>())
            {
                var funs = funRepository.Object.GetAllList(a => a.IsDeleted == false);
                var topFunNo = System.Configuration.ConfigurationManager.AppSettings["SystemFunction.Top.FunctionNo"] ?? "HTSystem";
                var topFun = funs.FirstOrDefault(a => a.FunctionNo == topFunNo);
                var topPermName = topFun?.PermissionName ?? PermissionNames.Pages;
                if (topFun != null)
                    context.Manager.MainMenu.AddItem(new MenuItemDefinition(topPermName, L("Home"), topFun.Icon, topFun.Url,
                        topFun.NeedAuth, topPermName, 0, topFun));
                SetChildNavigation(context.Manager.MainMenu, funs, topFunNo);
            }
        }

        private void SetChildNavigation(MenuDefinition menu, IList<SysFunction> list, string parentNo)
        {
            var funs = list.Where(a => a.ParentNo == parentNo).ToList();
            if (funs.Any())
            {
                foreach (var fun in funs)
                {
                    if (fun.FunctionType != FunctionTypeDefinition.Catalog &&
                        fun.FunctionType != FunctionTypeDefinition.Menu)
                        continue;
                    var item = new MenuItemDefinition(fun.PermissionName, L(fun.PermissionName.Replace(".", "")), fun.Icon, fun.Url,
                        fun.NeedAuth, fun.PermissionName, fun.Sort, fun);
                    SetChildNavigation(item, list, fun.FunctionNo);
                    menu.AddItem(item);
                }
            }
        }

        private void SetChildNavigation(MenuItemDefinition menu, IList<SysFunction> list, string parentNo)
        {
            var funs = list.Where(a => a.ParentNo == parentNo).ToList();
            if (funs.Any())
            {
                foreach (var fun in funs)
                {
                    if (fun.FunctionType != FunctionTypeDefinition.Catalog &&
                        fun.FunctionType != FunctionTypeDefinition.Menu)
                        continue;
                    var item = new MenuItemDefinition(fun.PermissionName, L(fun.PermissionName.Replace(".", "")), fun.Icon, fun.Url,
                        fun.NeedAuth, fun.PermissionName, fun.Sort, fun);
                    SetChildNavigation(item, list, fun.FunctionNo);
                    menu.AddItem(item);
                }
            }
        }

        private static ILocalizableString L(string name)
        {
            return new LocalizableString(name, IwbZeroConsts.LocalizationSourceName);
        }
    }
}