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using System;
using System.Collections.Generic;
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;
using System.Data;
using System.Collections.ObjectModel;
using System.Data.Entity.Core.Objects;
using System.Data.Entity;

namespace HomeWork_Kr.Pages

{
    /// <summary>
    /// Логика взаимодействия для PageEmployee.xaml
    /// </summary>
    public partial class PageEmployee : Page
    {
        ObservableCollection<Employee> ListEmployee;
        public static TitleEmployeeEntities DataEntitiesEmployee { get; set; }
        private void Page_Loaded(object sender, RoutedEventArgs e)
        {
            GetEmployees();
            DataGridEmployee.SelectedIndex=0;
        }

        public PageEmployee()
        {
            GetEmployees();
            DataGridEmployee.SelectedIndex = 0;

        }
        private bool isDirty = true;
        private void GetEmployees()
        {
            var employees = DataEntitiesEmployee.Employees;
            var queryEmployee = from employee in employees
                                orderby employee.Surname
                                select employee;
            foreach (Employee emp in queryEmployee)
            {
                ListEmployee.Add(emp);
            }
            DataGridEmployee.ItemsSource = ListEmployee;
        }
        private void RewriteEmployee()
        {
           // DataEntitiesEmployee = new TitlePresonalEntities();
           // ListEmployee.Clear();
            //GetEmployees();
        }
        private void UndoCommandBinding_Executed(object sender,
         ExecutedRoutedEventArgs e)
        {
            RewriteEmployee();
            DataGridEmployee.IsReadOnly = true;
            isDirty = true;

        }
        private void EditCommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            DataGridEmployee.IsReadOnly = false;
            DataGridEmployee.BeginEdit();
            isDirty = false;

        }
        private void SaveCommandBinding_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            DataEntitiesEmployee.SaveChanges();
            isDirty = true;
            DataGridEmployee.IsReadOnly = true;
        }
        private void UndoCommandBilding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Отмена");
            isDirty = true;
        }
        private void EditCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Редактирование");
            isDirty = false;
        }
        private void NewCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            Employee employee = new Employee()
            {
                id = -1,
                Surname = "Не задано",
                Name = "Не задано",
                Patronymic = "Не задано",
                Telephone = "Не задано",
                Email = "Не задано",
                TitleID = 0
            };
            try
            {
                DataEntitiesEmployee.Employees.Add(employee);
                ListEmployee.Add(employee);
                DataGridEmployee.ScrollIntoView(employee);
                DataGridEmployee.SelectedIndex = DataGridEmployee.Items.Count - 1;
                DataGridEmployee.Focus();
                DataGridEmployee.IsReadOnly = false;
                isDirty = false;
            }
            catch (Exception ex)
            {
                throw new ApplicationException("Ошибка добавления нового сотрудника в контент данных"+ex.ToString());
            }

        }
        private void FindCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Поиск");
        }
        private void SaveCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Сохранить");
            isDirty = true;
        }
        private void DeleteCommandBinding_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            Employee emp = DataGridEmployee.SelectedItem as Employee;
            if (emp != null)
            {
                MessageBoxResult result = MessageBox.Show("Удалить сотрудника: " +
        emp.Surname + " " + emp.Name + " " + emp.Patronymic,
        "Предупреждение", MessageBoxButton.OKCancel);
                if (result == MessageBoxResult.OK)
                {
                    //DataEntitiesEmployee.Remove(emp);
                    DataGridEmployee.SelectedIndex =
                     DataGridEmployee.SelectedIndex == 0 ? 1 : DataGridEmployee.SelectedIndex - 1;
                    ListEmployee.Remove(emp);
                    DataEntitiesEmployee.SaveChanges();
                }
            }
            else
            {
                MessageBox.Show("Выберите строку для удаления");
            }

        }

        private void DataGridEmployee_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {

        }
    }
}