using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using Aitex.Core.RT.Log;
using MECF.Framework.UI.Client.ClientBase;
using OpenSEMI.ClientBase;
using OpenSEMI.ClientBase.Command;

namespace MECF.Framework.UI.Client.CenterViews.Configs.Roles
{
    public class RoleViewModel : BaseModel
    {
        #region Variables

        private bool _isEnabledRoleName;
        private RoleItem _treeSelectedRole;
        private CtrlMode _controlMode = CtrlMode.VIEW;

        #endregion

        #region Constructors
        
        public RoleViewModel()
        {
            DisplayName = "Role";
        }
        
        #endregion

        #region Properties

        /// <summary>
        /// 返回当前视图是否具有访问权限
        /// </summary>
        public bool IsPermission => Permission == 3;
        
        public bool IsEnabledRoleName
        {
            get => _isEnabledRoleName;
            set { _isEnabledRoleName = value; NotifyOfPropertyChange(); }
        }
        
        public static RoleManager RoleManager => RoleManager.Instance;
        
        public ObservableCollection<PermissionType> PermissionDictionary => RolePermissionMapper.Instance.PermissionDictionary;
        public ObservableCollection<PermissionType> PermissionTrueFalseDictionary => RolePermissionTrueFalseMapper.Instance.PermissionDictionary;
        
        public ObservableCollection<RoleItem> RoleList { get; } = new();

        public RoleItem TreeSelectedRole
        {
            get => _treeSelectedRole;
            set
            {
                _treeSelectedRole = value;
                NotifyOfPropertyChange();
            }
        }
        
        public CtrlMode ControlMode
        {
            get => _controlMode;
            set 
            {
                _controlMode = value; 
                NotifyOfPropertyChange(); 
            }
        }
        
        #endregion

        #region Methods

        protected override void OnActivate()
        {
            RoleList.Clear();
            _treeSelectedRole = null;
            RoleManager.Initialize();
            LoadRoleList();

            base.OnActivate();
        }

        protected override void OnDeactivate(bool close)
        {
            if (ControlMode == CtrlMode.EDIT && IsPermission)
            {
                if (DialogBox.Confirm("The data has been modified. Do you want to save the change(s)?"))
                {
                    if (SaveChanges())
                    {
                        ControlMode = CtrlMode.VIEW;
                        DialogBox.ShowInfo("Operated successfully.");
                    }
                }
            }
            base.OnDeactivate(close);
        }

        public void OnRoleChanged()
        {
           var roleNameList = new[] { "管理员", "设备工程师", "工艺工程师", "操作员" };
            var roleName = roleNameList.Contains(TreeSelectedRole.DisplayRoleName) ? TreeSelectedRole.DisplayRoleName : "";
            IsEnabledRoleName = true;
            if (!string.IsNullOrEmpty(roleName))
                IsEnabledRoleName = false;

            if (ControlMode == CtrlMode.EDIT)
            {
                if (!string.IsNullOrEmpty(TreeSelectedRole.DisplayRoleName) && TreeSelectedRole.DisplayRoleName.Length > 18)
                    TreeSelectedRole.DisplayRoleName = TreeSelectedRole.DisplayRoleName.Substring(0, 18);

                return;
            }

            //check role to set the mode from view to edit
            if (_treeSelectedRole != null && _treeSelectedRole.IsRoleChanged())
                ControlMode = CtrlMode.EDIT;
        }
        
        public bool OnAutoLogoutTimeChecked(object sender)
        {
            ControlMode = CtrlMode.EDIT;
            return ((CheckBox)(sender)).IsChecked.Value;
        }
        
        private bool SaveChanges()
        {
            if (string.IsNullOrWhiteSpace(TreeSelectedRole.DisplayRoleName))
            {
                DialogBox.ShowWarning("{0} cannot be empty.", "Role name");
                //TreeSelectedRole.DisplayRoleName = "No Name";
                return false;
            }

            if (IsRoleExists(TreeSelectedRole))
            {
                DialogBox.ShowWarning("{0} already exists.", "Role");
                return false;
            }

            TreeSelectedRole.RoleName = TreeSelectedRole.DisplayRoleName;
            TreeSelectedRole.IsAutoLogout = TreeSelectedRole.DisplayIsAutoLogout;
            TreeSelectedRole.AutoLogoutTime = TreeSelectedRole.DisplayAutoLogoutTime;
            TreeSelectedRole.RoleNameTextSaved = TreeSelectedRole.TimeTextSaved = true;
            TreeSelectedRole.Description = TreeSelectedRole.DisplayDescription;

            try
            {
                RoleManager.SaveRole(TreeSelectedRole);
            }
            catch (Exception ex)
            {
                LOG.Write(ex);
                return false;
            }
            return true;
        }
        
        private bool IsRoleExists(RoleItem role)
        {
            if (RoleList == null || RoleList.Count == 0)
                return false;

            var sameNameList = RoleList.Where(t => t.DisplayRoleName == role.DisplayRoleName);
            if (sameNameList == null || sameNameList.Count() <= 1)
                return false;

            return true;
        }
        
        private void LoadRoleList()
        {
            RoleList.Clear();
            var roles = RoleManager.GetAllRoles();
            if (roles == null || roles.Count == 0)
                return;

            foreach (var r in roles)
            {
                var treeRole = RoleManager.CloneRole(r);
                if (treeRole != null)
                {
                    RoleList.Add(treeRole);
                }
            }
            TreeSelectedRole = RoleList.FirstOrDefault();
            TreeSelectedRole.IsSelected = true;
            ControlMode = CtrlMode.VIEW;
        }
        
        private void OnRoleTreeSelectedChanged(EventCommandParameter<object, RoutedEventArgs> arg)
        {
            var roleItem = arg.CustomParameter as RoleItem;
            if (roleItem == null)
                return;
            TreeSelectedRole = roleItem;
        }
        
        private void OnBtnAddRoleCommand(object arg)
        {
            var newRole = RoleManager.CreateRole();
            if (newRole != null)
            {
                RoleList.Add(newRole);
                TreeSelectedRole = newRole;
                TreeSelectedRole.IsSelected = true;
            }
            ControlMode = CtrlMode.EDIT;
        }
        
        private void OnBtnDeleteRoleCommand(object arg)
        {
            var lstRoleCanNotDelete = new List<string>() { "管理员", "设备工程师", "工艺工程师", "操作员" };
            if (TreeSelectedRole == null) return;

            if (lstRoleCanNotDelete.Contains(TreeSelectedRole.DisplayRoleName))
            {
                DialogBox.ShowWarning("Can not delete a fixed role");
                return;
            }

            if (!DialogBox.Confirm("Are you sure that you want to delete this role?"))
            {
                return;
            }

            if (BaseApp.Instance.UserContext.Role.RoleId == TreeSelectedRole.RoleId)
            {
                DialogBox.ShowWarning("The action cannot be completed because {0} is currently in use.", "the role");
                return;
            }

            if(TreeSelectedRole.RoleId == "0" || TreeSelectedRole.RoleId == "1" ||
               TreeSelectedRole.RoleId == "2" || TreeSelectedRole.RoleId == "3")
            {
                DialogBox.ShowWarning("Can not delete a fixed role");
                return;
            }

            try
            {
                var index = RoleList.IndexOf(TreeSelectedRole);
                RoleList.Remove(TreeSelectedRole);
                RoleManager.DeleteRole(TreeSelectedRole.RoleId);
                index = index > 1 ? index - 1 : 0;
                TreeSelectedRole = RoleList == null ? null : RoleList[index];
                TreeSelectedRole.IsSelected = true;
                DialogBox.ShowInfo("Operated successfully.");
            }
            catch (Exception ex)
            {
                LOG.Error(ex.StackTrace);
                DialogBox.ShowInfo("Operation failed.");
            }
        }
        
        private void OnBtnCloneRoleCommand(object arg)
        {
            if (_treeSelectedRole != null)
            {
                var newRole = RoleManager.CreateRole(_treeSelectedRole);
                if (newRole != null)
                {
                    newRole.DisplayRoleName = newRole.RoleName = "Copy of " + newRole.DisplayRoleName;
                    RoleList.Add(newRole);
                    TreeSelectedRole = newRole;
                    TreeSelectedRole.IsSelected = true;
                    ControlMode = CtrlMode.EDIT;
                }
            }
        }
        
        private void OnBtnSaveCommand(object arg)
        {
            try
            {
                if (SaveChanges())
                {
                    DialogBox.ShowInfo("Operated successfully.");
                    ControlMode = CtrlMode.VIEW;
                }
                else
                    DialogBox.ShowInfo("Operation failed.");
            }
            catch (Exception ex)
            {
                LOG.Error(ex.StackTrace);
                DialogBox.ShowInfo("Operation failed.");
            }
        }
        
        private void OnBtnCancelRoleCommand(object arg)
        {
            LoadRoleList();
            ControlMode = CtrlMode.VIEW;
        }
        
        #endregion
        
        #region commands
        
        private ICommand _roleTreeSelectChangedCmd;
        public ICommand RoleTreeSelectChangedCommand
        {
            get
            {
                if (_roleTreeSelectChangedCmd == null)
                    _roleTreeSelectChangedCmd = new BaseCommand<EventCommandParameter<object, RoutedEventArgs>>((EventCommandParameter<object, RoutedEventArgs> arg) => OnRoleTreeSelectedChanged(arg));
                return _roleTreeSelectChangedCmd;
            }
        }

        private ICommand _btnSaveCommand;
        public ICommand BtnSaveCommand
        {
            get
            {
                if (_btnSaveCommand == null)
                    _btnSaveCommand = new BaseCommand<object>((object arg) => OnBtnSaveCommand(arg));
                return _btnSaveCommand;
            }
        }

        private ICommand _btnAddRoleCommand;
        public ICommand BtnAddRoleCommand
        {
            get
            {
                if (_btnAddRoleCommand == null)
                    _btnAddRoleCommand = new BaseCommand<object>((object arg) => OnBtnAddRoleCommand(arg));
                return _btnAddRoleCommand;
            }
        }

        private ICommand _btnDeleteRoleCommand;
        public ICommand BtnDeleteRoleCommand
        {
            get
            {
                if (_btnDeleteRoleCommand == null)
                    _btnDeleteRoleCommand = new BaseCommand<object>((object arg) => OnBtnDeleteRoleCommand(arg));
                return _btnDeleteRoleCommand;
            }
        }

        private ICommand _btnCloneRoleCommand;
        public ICommand BtnCloneRoleCommand
        {
            get
            {
                if (_btnCloneRoleCommand == null)
                    _btnCloneRoleCommand = new BaseCommand<object>((object arg) => OnBtnCloneRoleCommand(arg));
                return _btnCloneRoleCommand;
            }
        }
        private ICommand _btnCancelRoleCommand;
        public ICommand BtnCancelRoleCommand
        {
            get
            {
                if (_btnCancelRoleCommand == null)
                    _btnCancelRoleCommand = new BaseCommand<object>((object arg) => OnBtnCancelRoleCommand(arg));
                return _btnCancelRoleCommand;
            }
        }
        
        #endregion

        

        

        

        
        

       
        
    }
}