using BPA.Message;
using BPASmartClient.CustomResource.Pages.Enums;
using BPASmartClient.CustomResource.Pages.Model;
using BPA.Helper;
 
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace FryPot_DosingSystem.ViewModel
{
    internal class UserManageViewModel : NotifyBase
    {
        private static UserManageViewModel _instance;
        public static UserManageViewModel GetInstance=>_instance??= new UserManageViewModel();  
        public ObservableCollection<UserInfo> usersInfo { get; set; } = new ObservableCollection<UserInfo>();

        //public List<Permission> Authorities { get; set; } = new List<Permission>() { Permission.管理员, Permission.操作员, Permission.观察员, Permission.技术员 };
        public List<string> Authorities { get; set; } = new List<string>();
        public BPARelayCommand<string> SaveCommand { get; set; }
        public BPARelayCommand<string> DeleteCommand { get; set; }
        public UserManageViewModel()
        {
            var userManager = JsonConvert.DeserializeObject<UserManager>(File.ReadAllText("up.hbl").AESDecrypt());
            usersInfo = userManager.userInfos;
            AddAuthorities();
           
            SaveCommand = new BPARelayCommand<string>((str) =>
            {
                if (str != string.Empty && str != null)
                {
                    int num = usersInfo.Where(p => p.UserName == str).Count();
                    if (num > 0 && num >= 2)
                    {
                        MessageBox.Show("用户名重复", "提示", MessageBoxButton.OK, MessageBoxImage.Information);
                    }
                    else
                    {
                        var res = usersInfo.FirstOrDefault(p => p.UserName == str);
                        if (res.Id == null || res.Id == string.Empty)
                        {
                            res.Id = IdProcess();
                        }
                        Global.userManager.userInfos = usersInfo;
                        File.WriteAllText("up.hbl", JsonConvert.SerializeObject(Global.userManager).AESEncrypt());
                        MessageBox.Show("保存成功", "提示", MessageBoxButton.OK, MessageBoxImage.Information);

                    }

                }
            });
            DeleteCommand = new BPARelayCommand<string>((str) =>
            {
                if (str != string.Empty && str != null)
                {
                    var userInfo = usersInfo.FirstOrDefault(p => p.Id == str);
                    if (userInfo != null)
                    {
                        if (usersInfo.Remove(userInfo))
                        {
                            Global.userManager.userInfos = usersInfo;
                            File.WriteAllText("up.hbl", JsonConvert.SerializeObject(Global.userManager).AESEncrypt());
                        }
                    }
                    else
                    {
                        MessageBox.Show("未找到对应记录", "提示", MessageBoxButton.OK, MessageBoxImage.Information);
                    }
                }
            });
        }



        public string IdProcess()
        {
        erp:
            string id = Guid.NewGuid().ToString();
            if (usersInfo.Count > 0)
            {
                var res = usersInfo.FirstOrDefault(p => p.Id == id);
                if (res != null)
                {
                    goto erp;
                }
                else
                {
                    return id;
                }
            }
            return id;
        }

        private void AddAuthorities()
        {
            foreach (Permission aut in System.Enum.GetValues(typeof(Permission)))
            {
                Authorities.Add(aut.ToString());
            }

        }
    }
}