using LR1.Entities;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data.Services.Client;
using System.Data.Entity.Core.Objects;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace LR1
{
    /// <summary>
    /// Логика взаимодействия для Workers.xaml
    /// </summary>
    
    public partial class Workers : Page
    {
        public static WorkersEntities DataEntitiesEmployee { get; set; }
        public static ObservableCollection<Employee> ListEmployee;
        public Workers()
        {
            DataEntitiesEmployee = new WorkersEntities();
            InitializeComponent();
            ListEmployee = new ObservableCollection<Employee>();
        }

        private bool isDirty = true;
        private bool isLoaded = false;
        private void UndoCommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = isLoaded;
        }

        private void UndoCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Отмена");
            isDirty = true;
            isLoaded = false;
        }

        private void DeleteCommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = isDirty;
        }

        private void DeleteCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Удаление");
            isDirty = false;
            isLoaded = true;
        }

        private void AddCommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = isDirty;
        }

        private void AddCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            Employee employee = Employee.CreateEmployee(-1, "не задано", "не задано", "не задано", 0);
            employee.Telephone = "не задано";
            employee.Email = "не задано";
            try
            {
                DataEntitiesEmployee.Employees.Add(employee);
                ListEmployee.Add(employee);
                DataGridEmployee.ScrollIntoView(employee);
                DataGridEmployee.SelectedIndex = DataGridEmployee.Items.Count - 1;
                DataGridEmployee.Focus();
                DataGridEmployee.IsReadOnly = false;

                MessageBox.Show("Создание");
                isDirty = false;
                isLoaded = true;
            }
            catch (DataServiceRequestException ex)
            {
                throw new ApplicationException("Ошибка добавления нового сотрудника в контекст данных" + ex.ToString());
            }
        }

        private void EditCommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = isDirty;
        }

        private void EditCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Редактирование");
            DataGridEmployee.IsReadOnly = false;
            DataGridEmployee.BeginEdit();
            isDirty = false;
            isLoaded = true;
        }

        private void FindCommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = isDirty;
        }

        private void FindCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Поиск");
            isDirty = false;
            isLoaded = true;
        }

        private void SaveCommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = isLoaded;
        }

        private void SaveCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Сохра");
            DataEntitiesEmployee.SaveChanges();
            isDirty = true;
            DataGridEmployee.IsReadOnly=true;
            isLoaded = false;
        }

        private void Page_Loaded(object sender, RoutedEventArgs e)
        {
            var queryEmployee = DataEntitiesEmployee.Employees.OrderBy(Employee => Employee.Surname);
            foreach (Employee emp in queryEmployee)
            {
                ListEmployee.Add(emp);
            }
            DataGridEmployee.ItemsSource = ListEmployee;   
        }
    }
}