using DesktopTools.Models;
using ModuleTools.Attributes;
using ModuleTools.BindingModels;
using ModuleTools.BusinessLogics;
using ModuleTools.Extensions;
using ModuleTools.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace DesktopTools.Controls
{
	public partial class GenericControlEntityList<G, S, L, E, BL> : BaseControlViewEntityList
		where G : GetBindingModel, new()
		where S : SetBindingModel, new()
		where L : ListViewModel<E>
		where E : ElementViewModel
		where BL : GenericBusinessLogic<G, S, L, E>
	{
		/// <summary>
		/// Объект бизнес-логики для получения данных
		/// </summary>
		protected BL _businessLogic;

		/// <summary>
		/// Констркутор
		/// </summary>
		public GenericControlEntityList()
		{
			InitializeComponent();
			InitEvents();
			_businessLogic = DependencyManager.Instance.Resolve<BL>();
		}

		public override async void Open()
		{
			base.Open();
			if (dataGridViewList.Columns.Count == 0)
			{
				Configurate(GetConfig());
			}
			await LoadListAsync();
		}

		public override void Close()
		{
			base.Close();
		}

		/// <summary>
		/// Конфигуратор контрола
		/// </summary>
		/// <param name="model">Настройки</param>
		private void Configurate(ControlViewEntityListConfiguration config)
		{
			if (config == null)
			{
				return;
			}
			// формирование таблицы на основе модели
			dataGridViewList.Columns.Clear();
			var properties = typeof(E).GetProperties();
			foreach (var property in properties)
			{
				var attr = property.GetCustomAttribute<ViewModelOnListPropertyAttribute>();
				if (attr != null)
				{
					var colIndex = attr.DisplayName == "Идентификатор" ? 0 : dataGridViewList.Columns.Count;
					dataGridViewList.Columns.Insert(colIndex, new DataGridViewTextBoxColumn
					{
						HeaderText = attr.DisplayName,
						Name = string.Format("Column{0}", property.Name),
						ReadOnly = true,
						Visible = !attr.IsHide,
						Width = attr.ColumnWidth ?? 0,
						AutoSizeMode = attr.ColumnWidth.HasValue ? DataGridViewAutoSizeColumnMode.None : DataGridViewAutoSizeColumnMode.Fill
					});
				}
			}
			// настройка отображения основных кнопок
			if (config.ShowToolStripButton != null)
			{
				foreach (ToolStripItem button in toolStripMenu.Items)
				{
					if (config.ShowToolStripButton.Contains(button.Name))
					{
						button.Visible = false;
						switch (button.Name)
						{
							case "toolStripButtonUpd":
								toolStripSeparator1.Visible = false;
								break;
							case "toolStripButtonDel":
								toolStripSeparator2.Visible = false;
								break;
							case "toolStripButtonRef":
								toolStripSeparator3.Visible = false;
								break;
							case "toolStripButtonSearch":
								toolStripSeparator4.Visible = false;
								break;
						}
					}
				}
			}
			// Загрузка подпунктов в контекстное меню и в пункт меню "Действие"
			if (config.ControlOnMoveElem != null)
			{
				foreach (var elem in config.ControlOnMoveElem)
				{
					ToolStripMenuItem item = new() { Text = elem.Value.Title, Name = elem.Key };
					item.Click += elem.Value.Event;
					toolStripSplitButtonActions.DropDownItems.Add(item);
					contextMenuStripDataGrid.Items.Add(item);
				}
			}
			// либо скрытие пункта, если не предусмотренно подпунктов
			else
			{
				toolStripSplitButtonActions.Visible = false;
				toolStripSeparator3.Visible = false;
			}

			// Пагинация
			if (config.PaginationOn)
			{
				if (config.CountElementsOnPage.HasValue)
				{
					toolStripTextBoxPage.Tag = config.CountElementsOnPage.Value;
				}
				// пагинация по названиям
				if (config.PageNamesForPagination != null)
				{
					toolStripButtonPrev.Visible = toolStripLabelPage.Visible = toolStripTextBoxPage.Visible = toolStripLabelCountPages.Visible =
						toolStripButtonNext.Visible = false;
					toolStripComboBoxPageNames.Items.AddRange(config.PageNamesForPagination.ToArray());
					toolStripComboBoxPageNames.SelectedIndex = 0;
				}
				// пагинация по страницам
				else
				{
					toolStripLabelPageName.Visible = toolStripComboBoxPageNames.Visible = false;
				}
			}
			// нет пагинации
			else
			{
				toolStripFooter.Visible = false;
			}
		}

		/// <summary>
		/// Инициализация событий к контролам
		/// </summary>
		private void InitEvents()
		{
			toolStripButtonAdd.Click += (object sender, EventArgs e) => { CallAddElementEvent(); };
			toolStripButtonUpd.Click += (object sender, EventArgs e) => { CallUpdElementEvent(); };
			toolStripButtonDel.Click += (object sender, EventArgs e) => { CallDelElementEvent(); };
			toolStripButtonSearch.Click += (object sender, EventArgs e) => { panelSearch.Visible = !panelSearch.Visible; };
			toolStripButtonRef.Click += async (object sender, EventArgs e) => { await LoadListAsync(); };
			toolStripButtonClose.Click += (object sender, EventArgs e) => { Close(); };

			buttonSearch.Click += async (object sender, EventArgs e) => { await LoadListAsync(); };
			buttonCancelSearch.Click += (object sender, EventArgs e) => { panelSearch.Visible = false; };

			dataGridViewList.KeyDown += (object sender, KeyEventArgs e) =>
			{
				switch (e.KeyCode)
				{
					case Keys.Insert:
						CallAddElementEvent();
						break;
					case Keys.Enter:
						CallUpdElementEvent();
						break;
					case Keys.Delete:
						CallDelElementEvent();
						break;
				}
			};
			dataGridViewList.CellDoubleClick += (object sender, DataGridViewCellEventArgs e) =>
			{
				CallUpdElementEvent();
			};

			toolStripButtonPrev.Click += async (object sender, EventArgs e) =>
			{
				if (int.TryParse(toolStripTextBoxPage.Text, out int page))
				{
					toolStripTextBoxPage.Text = (page - 1).ToString();
					await LoadListAsync();
				}
			};
			toolStripButtonNext.Click += async (object sender, EventArgs e) =>
			{
				if (int.TryParse(toolStripTextBoxPage.Text, out int page))
				{
					toolStripTextBoxPage.Text = (page + 1).ToString();
					await LoadListAsync();
				}
			};
			toolStripTextBoxPage.KeyDown += async (object sender, KeyEventArgs e) =>
			{
				if (e.KeyData == Keys.Enter)
				{
					await LoadListAsync();
				}
			};

			toolStripComboBoxPageNames.SelectedIndexChanged += async (object sender, EventArgs e) => { await LoadListAsync(); };
		}

		/// <summary>
		/// Вызов события загрузки данных на datagrid
		/// </summary>
		private async Task LoadListAsync()
		{
			var cursor = Cursor.Current;
			L data = null;
			try
			{
				Cursor.Current = Cursors.WaitCursor;
				// если включена пагинация
				if (toolStripFooter.Visible)
				{
					// постраничная
					if (toolStripTextBoxPage.Visible)
					{
						if (int.TryParse(toolStripTextBoxPage.Text, out int page) && int.TryParse(toolStripTextBoxPage.Tag.ToString(), out int count))
						{
							await Task.Run(() => data = GetDataWithPageNumber(page, count));
						}
					}
					// поименная
					else if (toolStripComboBoxPageNames.Visible)
					{
						var key = toolStripComboBoxPageNames.Text;
						if (key.IsNotEmpty())
						{
							await Task.Run(() => data = GetDataWithPageName(key));
						}
					}
				}
				else
				{
					await Task.Run(() => data = GetData());
				}

				if (data == null)
				{
					// TODO вывод сообщения об ощибок
					return;
				}

				toolStripLabelCountPages.Text = $"из {data.MaxCount}";
				FillDataOnGridAsync(data.List);
			}
			finally
			{
				Cursor.Current = cursor;
			}
		}

		/// <summary>
		/// Заполнение таблицы
		/// </summary>
		/// <param name="data"></param>
		private void FillDataOnGridAsync(List<E> data)
		{
			if (data == null)
			{
				return;
			}
			dataGridViewList.Rows.Clear();
			foreach (var elem in data)
			{
				var mas = new List<object>();
				foreach (DataGridViewColumn column in dataGridViewList.Columns)
				{
					mas.Add(elem.GetType().GetProperty(column.Name["Column".Length..])?.GetValue(elem));
				}

				dataGridViewList.Rows.Add(mas.ToArray());
			}
		}

		/// <summary>
		/// Вызов события при добавлении элемента
		/// </summary>
		private void CallAddElementEvent() => LaunchControl(null);

		/// <summary>
		/// Вызов события при изменении элемента
		/// </summary>
		private void CallUpdElementEvent()
		{
			foreach (DataGridViewRow selected in dataGridViewList.SelectedRows)
			{
				LaunchControl(new Guid(selected.Cells[0].Value.ToString()));
			}
		}

		/// <summary>
		/// Вызов события при удалении элемента
		/// </summary>
		private void CallDelElementEvent()
		{
			if (MessageBox.Show("Удалить выбранные записи?", "Подтверждение", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
			{
				var cursor = Cursor.Current;
				try
				{
					Cursor.Current = Cursors.WaitCursor;
					foreach (DataGridViewRow selected in dataGridViewList.SelectedRows)
					{
						_businessLogic.Delete(new G { Id = new Guid(selected.Cells[0].Value.ToString()) });
					}
				}
				catch (Exception ex)
				{
					if (_businessLogic.Errors.Count != 0)
					{
						MessageBox.Show(_businessLogic.Errors.LastOrDefault().Message ?? ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
					}
					MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
				}
				finally
				{
					Cursor.Current = cursor;
				}
			}
		}

		/// <summary>
		/// Создание формы с контролом для работы с элементом
		/// </summary>
		/// <param name="id"></param>
		private void LaunchControl(Guid? id)
		{
			try
			{
				var control = new GenericControlEntityElement<G, S, L, E, BL>(id);
				control.Open();
				var form = new Form
				{
					Height = control.Height,
					Width = control.Width,
					Text = $"{Title}. Добавление",
					StartPosition = FormStartPosition.CenterParent,
					ControlBox = false
				};
				form.Controls.Add(control);
				control.Dock = DockStyle.Fill;
				control.Form = form;
				form.Show();
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}

		protected virtual ControlViewEntityListConfiguration GetConfig() => new();

		protected virtual L GetData() { return null; }

		protected virtual L GetDataWithPageName(string key) { return null; }

		protected virtual L GetDataWithPageNumber(int page, int count) { return null; }
	}
}