using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;

namespace DesktopTools.BaseControls
{
	/// <summary>
	/// Контрол, предоставляющий работу с изображением
	/// </summary>
	public partial class BaseControlImage : AbstractBaseControl
	{
		/// <summary>
		/// Конструктор
		/// </summary>
		/// <param name="propertyName"></param>
		/// <param name="mustFilling"></param>
		/// <param name="readOnly"></param>
		/// <param name="width"></param>
		/// <param name="height"></param>
		public BaseControlImage(string propertyName, bool mustFilling, bool readOnly, int? width, int? height) : base(propertyName, mustFilling, readOnly)
		{
			InitializeComponent();
			if (width.HasValue)
			{
				Width = width.Value;
			}
			if (height.HasValue)
			{
				Height = height.Value;
			}

			buttonLoad.Click += (object sender, EventArgs e) =>
			{
				var dialog = new OpenFileDialog();
				if (dialog.ShowDialog() == DialogResult.OK)
				{
					try
					{
						pictureBox.ClientSize = new Size(150, 150);
						pictureBox.Image = new Bitmap(dialog.FileName);
						CallOnValueChangeEvent();
					}
					catch (Exception ex)
					{
						MessageBox.Show(ex.Message, "Ошибка при загрузке файла", MessageBoxButtons.OK, MessageBoxIcon.Error);
					}
				}
			};
			panelControl.Controls.Add(pictureBox);
		}

		protected override void SetDefaultValue() => _originalValue = null;

		protected override void SetValueToControl(object value)
		{
			if (value != null)
			{
				using MemoryStream mStream = new(value as byte[]);
				pictureBox.Image = Image.FromStream(mStream);
			}
			else if (!_mustFilling)
			{
				pictureBox.Image = null;
			}
		}

		public override void DropValue()
		{
			if (_originalValue != null)
			{
				using MemoryStream mStream = new(_originalValue as byte[]);
				pictureBox.Image = Image.FromStream(mStream);
			}
			else if (!_mustFilling)
			{
				pictureBox.Image = null;
			}
		}

		public override bool CheckValue()
		{
			if (_mustFilling && pictureBox.Image == null)
			{
				BackColor = Color.OrangeRed;
				return false;
			}
			return true;
		}

		protected override object GetValueFromControl()
		{
			if (_mustFilling && pictureBox.Image == null)
			{
				throw new ArgumentNullException($"Поле свойства '{labelTitle.Text}' должно быть заполнено");
			}
			var converter = new ImageConverter();
			return (byte[])converter.ConvertTo(pictureBox.Image, typeof(byte[]));
		}
	}
}