using System.Windows.Forms;
using FreeImageAPI;
using PDFPatcher.Common;
using PDFPatcher.Processor;
using PDFPatcher.Processor.Imaging;

namespace PDFPatcher.Functions
{
	sealed partial class ImageViewerForm : Form
	{
		public ImageViewerForm() {
			InitializeComponent();
		}
		internal ImageViewerForm(ImageInfo image, byte[] bytes) : this() {
			this.SetIcon(Properties.Resources.ViewContent);
			if (image.ExtName == Constants.FileExtensions.Png || image.ExtName == Constants.FileExtensions.Tif) {
				using (FreeImageBitmap bmp = ImageExtractor.CreateFreeImageBitmap(image, ref bytes, false, true)) {
					_ImageBox.Image = bmp.ToBitmap();
				}
			}
			else {
				try {
					using (var s = new System.IO.MemoryStream(bytes)) {
						using (FreeImageBitmap bmp = new FreeImageBitmap(s)) {
							_ImageBox.Image = bmp.ToBitmap();
						}
					}
				}
				catch (System.Exception ex) {
					this.ErrorBox("无法加载图片", ex);
				}
			}
		}

		protected override void OnClosed(System.EventArgs e) {
			_ImageBox.Image.TryDispose();
			base.OnClosed(e);
		}

		void _MainToolbar_ItemClicked(object sender, ToolStripItemClickedEventArgs e) {
			var n = e.ClickedItem.Name;
			switch (n) {
				case "_Save":
					using (var f = new SaveFileDialog {
						Title = "保存图片文件",
						DefaultExt = Constants.FileExtensions.Png,
						FileName = "导出图片.png",
						Filter = Constants.FileExtensions.ImageFilter
					}) {
						if (f.ShowDialog() == DialogResult.OK) {
							try {
								using (var fi = new FreeImageAPI.FreeImageBitmap(_ImageBox.Image)) {
									fi.Save(f.FileName);
								}
							}
							catch (System.Exception ex) {
								FormHelper.ErrorBox(ex.Message);
							}
						}
					}
					break;
				case "_ZoomReset":
					_ImageBox.ActualSize(); break;
				case "_FitWindow":
					_ImageBox.ZoomToFit(); break;
				default:
					break;
			}
		}
	}
}