using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Reactive.Linq;
using System.Text;
using System.Threading.Tasks;
using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Media.Imaging;
using Avalonia.Media.TextFormatting;
using Avalonia.Platform.Storage;
using AvaloniaApplicationTestNew.Models;
using AvaloniaApplicationTestNew.Views;
using Microsoft.EntityFrameworkCore;
using ReactiveUI;
using Tmds.DBus.Protocol;

namespace AvaloniaApplicationTestNew.ViewModels
{
    public class AddUserPageViewModel : ViewModelBase
    {
        string message;
        User newUser;
        Logined newLogined;
        List<Gender> gendersList;
        List<Role> roleList;
        Bitmap imageUser;

        public string Message { get => message; set => this.RaiseAndSetIfChanged(ref message, value); }
        public User NewUser { get => newUser; set => newUser = value; }
        public List<Gender> GendersList { get => gendersList; set => gendersList = value; }
        public Logined NewLogined { get => newLogined; set => newLogined = value; }
        public List<Role> RoleList { get => roleList; set => roleList = value; }
        public Bitmap ImageUser { get => imageUser; set => this.RaiseAndSetIfChanged(ref imageUser, value); }
        public AddUserPageViewModel()
        {
            NewUser = new User();
            NewLogined = new Logined();
            RoleList = myContext.Roles.ToList();
            GendersList = myContext.Genders.ToList();
        }

        public void CreateUser()
        {
            if (string.IsNullOrWhiteSpace(newLogined.Login) || string.IsNullOrWhiteSpace(newLogined.Password) || newLogined.IdRoleNavigation == null
                || string.IsNullOrWhiteSpace(newUser.Name) || newUser.IdGenderNavigation == null || newUser.BirthDate == null)
            {
                Message = "Заполните все поля";
            }
            else if(myContext.Logineds.Include(x => x.User.IdGenderNavigation).FirstOrDefault(x => x.Login == newLogined.Login && x.Password == newLogined.Password) != null)
            {
                Message = "Такой пользователь уже существует";
            }
            else if(DateTime.Today <= newUser.BirthDate)
            {
                Message = "Пользователь родился в будущем? Исправьте дату";
                newUser.BirthDate = null;
            }
            else
            {
                myContext.Add(NewLogined);
                myContext.SaveChanges();
                NewUser.IdUser = myContext.Logineds.FirstOrDefault(x => x.Login == NewLogined.Login && x.Password == NewLogined.Password).Id;
                myContext.Add(NewUser);
                myContext.SaveChanges();
                MainWindowViewModel.Self.Page = new AdminPage();
            }
            
        }
        public async Task Image()
        {
            if (Application.Current?.ApplicationLifetime is not IClassicDesktopStyleApplicationLifetime desktop ||
                desktop.MainWindow?.StorageProvider is not { } provider)
                throw new NullReferenceException("Missing StorageProvider instance.");
            var files = await provider.OpenFilePickerAsync(new FilePickerOpenOptions()
            {
                Title = "Выберите фото для аватарки",
                AllowMultiple = false
            });
            await using var readStream = await files[0].OpenReadAsync();
            byte[] buffer = new byte[1000000];
            var bytes = readStream.ReadAtLeast(buffer, 1);
            Array.Resize(ref buffer, bytes);
            NewUser.Image = buffer;
            ImageUser = new Bitmap(new MemoryStream(NewUser.Image));
            myContext.SaveChanges();
        }
        public void Back() => MainWindowViewModel.Self.Page = new AdminPage();
    }
}