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.Linq.Expressions;
using System.Data.Entity.Migrations;

namespace ROGOZ.Pages
{
    /// <summary>
    /// Логика взаимодействия для AddEditPage.xaml
    /// </summary>
    public partial class AddEditPage : Page
    {
        private user1Entities _context = new user1Entities();
        private Task _currentTask = null;

        
        public AddEditPage()
        {
            InitializeComponent();
            DataContext = _currentTask;
            CmbStatus.ItemsSource = Status.FillStatus();
            CmbTaskType.ItemsSource = WorkType.FillWorkType();
            //CmbExecutor.ItemsSource = user1Entities.GetContext().Executor.ToList();

            CmbExecutor.ItemsSource = _context.User.Where(u=>u.Executor != null).ToList();
            
        }

        public AddEditPage(Task selectedTask)
        {
            InitializeComponent();
            _currentTask = selectedTask;
            CmbStatus.ItemsSource = Status.FillStatus();
            //CmbExecutor.ItemsSource = user1Entities.GetContext().Executor.ToList();

            CmbExecutor.ItemsSource = _context.User.Where(u => u.Executor != null).ToList();
           

            CmbTaskType.ItemsSource = WorkType.FillWorkType();
            if (selectedTask != null)
                _currentTask = selectedTask;
            DataContext = _currentTask;
        }
        private void BtnCancel_Click(object sender, RoutedEventArgs e)
        {
            NavigationService.GoBack();
        }

        private string CheckErrors()
        {
            var errorBuilder = new StringBuilder();
            if (string.IsNullOrWhiteSpace(TaskNameTB.Text))
                errorBuilder.AppendLine("Укажите название заголовка!");
            if (CmbStatus.Text == null)
                errorBuilder.AppendLine("Выберите статус!");
            if (CmbTaskType.Text == null)
                errorBuilder.AppendLine("Выберите характеристику!");

            if (errorBuilder.Length > 0) //проверка на ошибку
            {
                MessageBox.Show(errorBuilder.ToString());
                return errorBuilder.ToString();
            }
            else return null;

        }
        private void BtnSaveTask_Click(object sender, RoutedEventArgs e)
        {
            if (CheckErrors() == null)
            {
                if (_currentTask == null)
                {
                    try
                    {
                        var selectedTask = new Task
                        {
                            //ExecutorID = int.Parse(CmbExecutor.SelectedItem.ToString()),
                            ExecutorID = (CmbExecutor.SelectedItem as User)?.ID ?? 0,
                            //ExecutorID =int.Parse(CmbExecutor.Text),
                            Title = TaskNameTB.Text,
                            Description = TaskDescriptionTB.Text,
                            CreateDateTime = DateTime.Parse(DPCreateDateTime.Text),
                            Deadline = DateTime.Parse(DPDeadLine.Text),
                            Difficulty = Double.Parse(DifficultyTB.Text),
                            Time = int.Parse(TimeTB.Text),
                            Status = CmbStatus.Text,
                            WorkType = CmbTaskType.Text,
                            IsDeleted = false
                        };
                        user1Entities.GetContext().Task.Add(selectedTask);
                        user1Entities.GetContext().SaveChanges();
                        MessageBox.Show("Задача добавлена");
                        NavigationService.GoBack();

                    }
                    catch
                    {
                        MessageBox.Show(CheckErrors(), "Ошибка", MessageBoxButton.OK, MessageBoxImage.Error);

                    }
                }
                else
                {
                    var context = user1Entities.GetContext();
                    context.SaveChanges();
                    MessageBox.Show("Задача отредактирована");
                    NavigationService.GoBack();
                }

            }

        }

        private void DifficultyTB_TextInput(object sender, TextCompositionEventArgs e)
        {
            if (!char.IsDigit(e.Text, e.Text.Length - 1))
            {
                e.Handled = true;
            }
        }

        private void DifficultyTB_TextChanged(object sender, TextChangedEventArgs e)
        {
            if (sender is TextBox diffTB)
            {
                if (string.IsNullOrEmpty(diffTB.Text)) { return; }
                if (!int.TryParse(diffTB.Text, out int number) ||  number < 1 || number >50)
                {
                    DifficultyTB.Clear();
                    MessageBox.Show("Пожалуйста, введите число от 1 до 50.");
                }
            }
        }
    }
}