using NewsBlogAbstractions.Models;
using NewsBlogAbstractions.WorkAbstractions;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace NewsBlogView
{
	public partial class FormArticle : Form
	{
		private readonly IArticleWork _articleLogic;
		private readonly IAuthorWork _authorLogic;
		private readonly ICategoryWork _categoryLogic;
		public FormArticle(IArticleWork articleLogic, IAuthorWork authorLogic, ICategoryWork categoryLogic)
		{
			InitializeComponent();
			_articleLogic = articleLogic;
			_authorLogic = authorLogic;
			_categoryLogic = categoryLogic;
		}

		private void FormArticle_Load(object sender, EventArgs e)
		{
			LoadData();
		}

		private void ButtonCreate_Click(object sender, EventArgs e)
		{
			Article newArticle = new()
			{
				Title = textBoxTitle.Text,
				Content = textBoxContent.Text,
				PublicationDate = DateTime.Now,
				AuthorId = ((Author?)comboBoxAuthor.SelectedItem)?.Id ?? 0,
				CategoryId = ((Category?)comboBoxCategory.SelectedItem)?.Id ?? 0,
			};

			_articleLogic.Create(newArticle);

			LoadData();
		}

		private void LoadData()
		{
			var articles = _articleLogic.GetAll();

			dataGridView.Rows.Clear();

			if (dataGridView.ColumnCount == 0)
			{
				dataGridView.Columns.Add("Id", "ID");
				dataGridView.Columns.Add("Title", "Заголовок");
				dataGridView.Columns.Add("Content", "Содержимое");
				dataGridView.Columns.Add("Date", "Дата публикации");
				dataGridView.Columns.Add("AuthorId", "AuthorId");
				dataGridView.Columns.Add("CategoryId", "CategoryId");
				dataGridView.Columns["AuthorId"].Visible = false;
				dataGridView.Columns["CategoryId"].Visible = false;
				dataGridView.Columns.Add("Author", "Автор");
				dataGridView.Columns.Add("Category", "Категория");
			}

			dataGridView.Columns["Id"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
			dataGridView.Columns["Title"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
			dataGridView.Columns["Content"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
			dataGridView.Columns["Date"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
			dataGridView.Columns["Author"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
			dataGridView.Columns["Category"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;

			comboBoxAuthor.DataSource = _authorLogic.GetAll();
			comboBoxAuthor.DisplayMember = "Author";
			comboBoxAuthor.ValueMember = "Name";

			comboBoxCategory.DataSource = _categoryLogic.GetAll();
			comboBoxCategory.DisplayMember = "Category";
			comboBoxCategory.ValueMember = "Name";

			foreach (var article in articles)
			{
				dataGridView.Rows.Add(article.Id, article.Title, article.Content, article.PublicationDate.ToString("d"), 
					article.AuthorId, article.CategoryId, _authorLogic.Get(article.AuthorId)?.Name, _categoryLogic.Get(article.CategoryId)?.Name);
			}
		}

		private void ButtonUpdate_Click(object sender, EventArgs e)
		{
			if (dataGridView.SelectedRows.Count > 0)
			{
				DataGridViewRow selectedRow = dataGridView.SelectedRows[0];
				int articleId = Convert.ToInt32(selectedRow.Cells["Id"].Value);

				Article updatedArticle = new()
				{
					Id = articleId,
					Title = textBoxTitle.Text,
					Content = textBoxContent.Text,
					PublicationDate = DateTime.Now,
					AuthorId = ((Author?)comboBoxAuthor.SelectedItem)?.Id ?? 0,
					CategoryId = ((Category?)comboBoxCategory.SelectedItem)?.Id ?? 0,
				};

				_articleLogic.Update(updatedArticle);

				LoadData();
			}
			else
			{
				MessageBox.Show("Пожалуйста, выберите статью, информацию о которой необходимо обновить");
			}
		}

		private void ButtonDelete_Click(object sender, EventArgs e)
		{
			if (dataGridView.SelectedRows.Count > 0)
			{
				DataGridViewRow selectedRow = dataGridView.SelectedRows[0];
				int articleId = Convert.ToInt32(selectedRow.Cells["Id"].Value);

				_articleLogic.Delete(articleId);

				LoadData();
			}
			else
			{
				MessageBox.Show("Пожалуйста, выберите статью, информацию о которой необходимо удалить");
			}
		}

		private void DataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
		{
			if (e.RowIndex >= 0)
			{
				DataGridViewRow row = dataGridView.Rows[e.RowIndex];
				textBoxTitle.Text = row.Cells["Title"].Value.ToString();
				textBoxContent.Text = row.Cells["Content"].Value.ToString();
				comboBoxAuthor.SelectedValue = row.Cells["Author"].Value ?? new Author { Name = "Неизвестный автор" };
				comboBoxCategory.SelectedValue = row.Cells["Category"].Value ?? new Category { Name = "Неизвестная категория" };
			}
		}
	}
}