using System;
using System.IO;
using System.Linq;
using ClearCanvas.Common;
using ClearCanvas.Desktop;
using ClearCanvas.Desktop.Actions;
using ClearCanvas.ImageViewer;
using ClearCanvas.ImageViewer.BaseTools;
using ClearCanvas.ImageViewer.RoiGraphics;
using Nullstack.ClearCanvasEx.ViewerEx.FileOps.Utilities;

namespace Nullstack.ClearCanvasEx.ViewerEx.FileOps
{
	[MenuAction("DumpRoi", "global-menus/mnFile/mnDumpRoi", "DumpRoi")]
	[GroupHint("DumpRoi", "File.Measurements.Dump")]
	[ExtensionOf(typeof (ImageViewerToolExtensionPoint))]
	internal class RoiDumpTool : ImageViewerTool
	{
		public void DumpRoi()
		{
			var img = SelectedPresentationImage;
			if (img == null) return;

			var graphic = img.SelectedGraphic as RoiGraphic;
			if (graphic == null)
			{
				return;
			}

			var args = new FileDialogCreationArgs(string.Empty);
			args.Title = SR.szSavePresentationState;
			args.Filters.Add(new StandardFileExtensionFilter("CSV File", "csv"));
			args.Filters.Add(StandardFileExtensionFilter.AllFilesExtensionFilter);
			args.FileExtension = "csv";

			var result = Context.DesktopWindow.ShowSaveFileDialogBox(args);
			if (result.Action == DialogBoxAction.Ok)
			{
				try
				{
					DumpRoi(graphic, result.FileName);
				}
				catch (Exception ex)
				{
					Platform.Log(LogLevel.Error, ex, "Failed to serialize presentation state.");
					ExceptionHandler.Report(ex, Context.DesktopWindow);
				}
			}
		}

		private static void DumpRoi(RoiGraphic g, string filename)
		{
			using (var fs = File.OpenWrite(filename))
			using (var sw = new StreamWriter(fs))
			{
				sw.WriteLine("X,Y,Raw,Transformed");

				var roi = g.GetRoi();
				foreach (var x in roi.GetRawPixelValues().Zip(roi.GetPixelValues(), (i, d) => new {Raw = i, Xform = d}).Zip(roi.GetPixelCoordinates(), (q, p) => new {q.Raw, q.Xform, p.X, p.Y}))
				{
					sw.WriteLine("{0},{1},{2},{3}", x.X, x.Y, x.Raw, x.Xform);
				}

				sw.Flush();
				sw.Close();
			}
		}
	}
}