using Prism.Commands;
using Prism.Mvvm;
using System;
using System.Collections.ObjectModel;
using System.Windows.Input;
using MECF.Framework.Common.ControlDataContext;
using MECF.Framework.Common.DataCenter;
using System.Windows.Threading;
using System.Threading.Tasks;
using System.Windows;
using WPF.Themes.UserControls;
using CyberX8_MainPages.Views;
using CyberX8_MainPages.Unity;
using System.Linq;
using Venus_Unity;
using System.IO;
using CyberX8_MainPages.Roles;

namespace CyberX8_MainPages.ViewModels
{
    internal class RoleViewModel : BindableBase
    {
        #region 私有属性
        /// <summary>
        /// 定时器
        /// </summary>
        DispatcherTimer _timer;
        /// <summary>
        /// 用户
        /// </summary>
        private ObservableCollection<UserItem> _users = new ObservableCollection<UserItem>();
        /// <summary>
        /// 已选用户
        /// </summary>
        private UserItem _selectedUser = new UserItem();
        /// <summary>
        /// 第一次加载
        /// </summary>
        private bool _firstLoad = true;
        /// <summary>
        /// Roles
        /// </summary>
        private ObservableCollection<string> _roles = new ObservableCollection<string>();
        /// <summary>
        /// RoleDefines
        /// </summary>
        private ObservableCollection<RoleDefine> _roleDefines;
        /// <summary>
        /// 当前RoleDefine
        /// </summary>
        private RoleDefine _currentRoleDefine;
        /// <summary>
        /// 当前Menus列表
        /// </summary>
        private ObservableCollection<Menu> _currentMenus = new ObservableCollection<Menu>();
        #endregion

        #region 属性
        /// <summary>
        /// 用户
        /// </summary>
        public ObservableCollection<UserItem> Users
        {
            get { return _users; }
            set { SetProperty(ref _users, value);}
        }
        /// <summary>
        /// 已选用户
        /// </summary>
        public UserItem SelectedUser
        {
            get { return _selectedUser; }
            set { SetProperty(ref _selectedUser, value);}
        }
        /// <summary>
        /// Roles
        /// </summary>
        public ObservableCollection<string> Roles
        {
            get { return _roles;}
            set { SetProperty(ref _roles, value);}
        }
        /// <summary>
        /// RoleDefines
        /// </summary>
        public ObservableCollection<RoleDefine> RoleDefines
        {
            get { return _roleDefines; }
            set { SetProperty(ref _roleDefines, value);}
        }
        /// <summary>
        /// 当前RoleDefine
        /// </summary>
        public RoleDefine CurrentRoleDefine
        {
            get { return _currentRoleDefine; }
            set { SetProperty(ref _currentRoleDefine, value);}
        }
        /// <summary>
        /// 当前Menus列表
        /// </summary>
        public ObservableCollection<Menu> CurrentMenus
        {
            get { return _currentMenus; }
            set { SetProperty(ref _currentMenus, value); }
        }
        #endregion

        #region Command指令
        /// <summary>
        /// Add Command
        /// </summary>
        public ICommand AddUserCommand { get; set; }
        /// <summary>
        /// Delete Command
        /// </summary>
        public ICommand DeleteUserCommand { get; set; }
        /// <summary> 
        /// Edit Command
        /// </summary>
        public ICommand EditUserCommand { get; set; }
        /// <summary>
        /// Change Role Setting Command
        /// </summary>
        public ICommand ChangeRoleCommand { get; set; }
        /// <summary> 
        /// Save Role Setting Command
        /// </summary>
        public ICommand SaveCommand { get; set; }
        #endregion

        /// <summary>
        /// 构造函数
        /// </summary>
        public RoleViewModel()
        {
            AddUserCommand = new DelegateCommand<object>(OnAddUser);
            DeleteUserCommand = new DelegateCommand<object>(OnDeleteUser);
            ChangeRoleCommand = new DelegateCommand<object>(OnChangeRole);
            SaveCommand = new DelegateCommand<object>(OnSaveRole);
            EditUserCommand = new DelegateCommand<object>(OnEditUser);

            string configPath = "";
            if (File.Exists($"Config/UIMenu_permission.json"))
            {
                configPath = $"Config/UIMenu_permission.json";
            }
            RoleDefines = SerializeHelper.Instance.ReadFromJsonFile<ObservableCollection<RoleDefine>>(configPath);
            for (int i = 0; i < RoleDefines.Count; i++)
            {
                Roles.Add(RoleDefines[i].RoleName);
            }
        }
        
        /// <summary>
        /// 加载数据
        /// </summary>
        public void LoadData(string systemName)
        {
            Users.Clear();
            Users = new ObservableCollection<UserItem>(QueryDataClient.Instance.Service.QueryAllUsers());
            if (_firstLoad)
            {
                GlobalEvents.Instance.UserViewUpdateEvent += Instance_UserViewUpdateEvent;
                _firstLoad = false;
            }
            CurrentRoleDefine = RoleDefines[0];
        }
        
        /// <summary>
        /// 隐藏
        /// </summary>
        public void Hide()
        {          
        }
        #region 指令Action
        /// <summary>
        /// 保存Role权限设置
        /// </summary>
        private void OnSaveRole(object param)
        {
            RoleDefines[Roles.IndexOf(CurrentRoleDefine.RoleName)] = CurrentRoleDefine;
            SerializeHelper.Instance.WriteToJsonFile<ObservableCollection<RoleDefine>>(RoleDefines, $"Config/UIMenu_permission.json");
        }
        /// <summary>
        /// 添加用户
        /// </summary>
        /// <param name="param"></param>
        private void OnAddUser(object param)
        {
            var _mainWindow = Application.Current.Windows.Cast<Window>().FirstOrDefault(window => window is Window) as Window;
            var userItem = new UserItemView();
            userItem.Show();
            userItem.Owner = _mainWindow;
            Users = new ObservableCollection<UserItem>(QueryDataClient.Instance.Service.QueryAllUsers());
        }
        /// <summary>
        /// 删除用户
        /// </summary>
        /// <param name="param"></param>
        private async void OnDeleteUser(object param)
        {
            if (SelectedUser == null)
            {
                WPFMessageBox.ShowWarning("Please Select User");
                return;
            }
            if (WPFMessageBox.ShowQuestion($"Delete User {SelectedUser.Name}?", "") == MessageBoxResult.Yes)
            {
                QueryDataClient.Instance.Service.DeleteUser(SelectedUser.Name);
                await Task.Delay(500);
                Users = new ObservableCollection<UserItem>(QueryDataClient.Instance.Service.QueryAllUsers());
            }
        }
        /// <summary>
        /// 编辑用户
        /// </summary>
        /// <param name="param"></param>
        private void OnEditUser(object param)
        {
            if (SelectedUser == null || string.IsNullOrEmpty(SelectedUser.Name))
            {
                WPFMessageBox.ShowWarning("Please Select User");
                return;
            }
            var _mainWindow = Application.Current.Windows.Cast<Window>().FirstOrDefault(window => window is Window) as Window;
            var userItem = new UserItemView(SelectedUser);
            userItem.Show();
            userItem.Owner = _mainWindow;

        }
        /// <summary>
        /// Change Role
        /// </summary>
        private void OnChangeRole(object param)
        {
            string roleName = param.ToString();
            CurrentRoleDefine = RoleDefines[Roles.IndexOf(roleName)];       
        }
        #endregion
        private void Instance_UserViewUpdateEvent()
        {
            Users = new ObservableCollection<UserItem>(QueryDataClient.Instance.Service.QueryAllUsers());
        }       
    }
}