using System;
using System.Collections.Generic;
using MsBox.Avalonia;
using System.Reactive;
using System.Text.RegularExpressions;
using ReactiveUI;
using Microsoft.EntityFrameworkCore;
using System.Linq;
using System.Numerics;
using System.Text;

namespace prakt1314.ViewModels
{
	public class CabinetViewModel : ReactiveObject
	{
        public CabinetViewModel(int userID)
        {
            ConfirmChanges = ReactiveCommand.Create(ConfirmChangesCommand);
            using (AvaloniaPrakt13DbContext _dbContext = new AvaloniaPrakt13DbContext()) _genderList = _dbContext.UserGenders.ToList();
            using (AvaloniaPrakt13DbContext _dbContext = new AvaloniaPrakt13DbContext()) UserData = _dbContext.UserData
                                                             .Include(a => a.IdUserNavigation)
                                                             .Include(a => a.IdGenderNavigation)
                                                             .Where(a => a.IdUser == userID)
                                                             .FirstOrDefault();

            WorkTimeInYear = ((double)UserData.Worktime / 12).ToString();
            foreach (UserGender gender in GenderList)
            {
                _userData.IdGenderNavigation = (gender.IdGender == _userData.IdGender) ? gender : _userData.IdGenderNavigation;
            }
            this.RaisePropertyChanged(nameof(UserData));
        }


        public UserDatum UserData
        {
            get => _userData;
            set => this.RaiseAndSetIfChanged(ref _userData, value);
        }

        public ICollection<UserGender> GenderList => _genderList;

        public string NewPassword
        {
            get => _newPassword;
            set => this.RaiseAndSetIfChanged(ref _newPassword, value);
        }
        public string NewPasswordConfirm
        {
            get => _newPasswordConfirm;
            set => this.RaiseAndSetIfChanged(ref _newPasswordConfirm, value);
        }

        public ReactiveCommand<Unit, Unit> ConfirmChanges { get; }

        public bool IsChecked
        {
            get => _isChecked;
            set => this.RaiseAndSetIfChanged(ref _isChecked, value);
        }

        public string? WorkTimeInYear
        {
            get => _workTimeInYear;
            set => this.RaiseAndSetIfChanged(ref _workTimeInYear, value);
        }


        public void ConfirmChangesCommand()
        {
            try
            {
                double year = Convert.ToDouble(WorkTimeInYear);
                UserData.Worktime = (int)(year * 12);
                WorkTimeInYear = ((double)UserData.Worktime / 12).ToString();
            }
            catch
            {
                UserData.Worktime = 0;
                WorkTimeInYear = ((double)UserData.Worktime / 12).ToString();
            }

            if (UserData.Surname.Length == 0 || UserData.Surname is null)
            {
                MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Фамилия пуста!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                return;
            }

            if (UserData.Name.Length == 0 || UserData.Name is null)
            {
                MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Имя пустое!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                return;
            }

            if (UserData.Patronymic is null || UserData.Patronymic.Length == 0)
            {
                MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Отчество пустое!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                return;
            }

            if (UserData.IdUserNavigation.Login.Length < 3 || UserData.IdUserNavigation.Login is null)
            {
                MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Логин не менее 3 символов!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                return;
            }

            if (UserData.Birthdate >= DateTime.Now)
            {
                MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Дата раждения в будущем!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                return;
            }

            if (UserData.Email is null || UserData.Email.Length == 0)
            {
                MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Почта пуста!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                return;
            }

            if (UserData.Email.Length > 0 && !Regex.IsMatch(UserData.Email,
                "(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|\"(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21\\x23-\\x5b\\x5d-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])*\")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\\.){3}(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]:(?:[\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x21-\\x5a\\x53-\\x7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])"))
            {
                MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Почта некорректна!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                return;
            }

            if (UserData.PhoneNumber is null || UserData.PhoneNumber.Length == 0)
            {
                MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Номер телефона пуст!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                return;
            }

            if (!(UserData.PhoneNumber is null || UserData.PhoneNumber.Length == 0))
            {
                if (!Regex.IsMatch(UserData.PhoneNumber, "^((8|\\+7)[\\- ]?)?(\\(?\\d{3}\\)?[\\- ]?)?[\\d\\- ]{7,10}$"))
                {
                    MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Телефон некорректен!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                    return;
                }

                StringBuilder ConvertedPhone = new StringBuilder("89");
                int NumberOfDigits = 0;
                foreach (char ch in UserData.PhoneNumber) if (char.IsDigit(ch)) NumberOfDigits++;
                int counter = -9 + NumberOfDigits;
                foreach (char ch in UserData.PhoneNumber) if (char.IsDigit(ch)) if (counter-- <= 0) ConvertedPhone.Append(ch);
                UserData.PhoneNumber = ConvertedPhone.ToString();
            }

            if (IsChecked)
            {
                if (NewPassword is null || NewPassword.Length == 0)
                {
                    MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Пароль пуст!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                    return;
                }
                if (NewPassword != NewPasswordConfirm)
                {
                    MessageBoxManager.GetMessageBoxStandard("Изменения не сохранены!"
                    , "Пароли разные!"
                    , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                    .ShowAsync();
                    return;
                }
                UserData.IdUserNavigation.Password = NewPassword;
            }

            using (AvaloniaPrakt13DbContext db = new AvaloniaPrakt13DbContext())
            {
                db.Entry(UserData).State = EntityState.Modified;
                db.Entry(UserData.IdUserNavigation).State = EntityState.Modified;
                db.Entry(UserData.IdGenderNavigation).State = EntityState.Modified;
                db.SaveChanges();
            }

            MessageBoxManager.GetMessageBoxStandard("Изменения сохранены!"
                        , "Изменения успешно сохранены!"
                        , MsBox.Avalonia.Enums.ButtonEnum.Ok)
                        .ShowAsync();
            return;
        }


        private UserDatum _userData;

        private List<UserGender> _genderList;

        private string _newPassword;
        private string _newPasswordConfirm;

        private bool _isChecked = false;

        private string? _workTimeInYear;
    }
}