///
/// Copyright (c) 2015 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Printing;
using System.IO;
using Config.Entities;
using TBF.Resources;

namespace TBF.BenchControl.ResultsPrinters.LabelPrinter
{
	public class PrintLabelDocument : PrintDocument
	{
		const int FontSize = 9;
		const string FontFamilyName = "Arial";  //"Times New Roman";

		readonly int paperWidth;
		readonly int paperHeight;
		readonly string templateFile;

		/// <summary> Property variable for the Font the user wishes to use </summary>
		Font font;

		///
		/// Data to print
		///
		Results.Entities.Batch batch;

		///
		/// Items to print
		///
		IList<Results.ItemSpec> rsltItems;

		///
		/// Layout and status
		///
		int nextWMNr;				/// nr. of watermeter to be printed as the first one on the next page
		int nrPages;
		int pageNr;					/// Page number to be printed at the bottom of the page


		/// <summary>
		/// Constructor
		/// </summary>
		/// <param name="textToPrint">Text to be printed</param>
		public PrintLabelDocument(Results.Entities.Batch batch,
								  PageOrientation pageOrientation,
								  int paperWidth,
								  int paperHeight,
								  string templateFile)
		{
			this.batch = batch;
			this.paperWidth = paperWidth;
			this.paperHeight = paperHeight;
			this.templateFile = templateFile;

			DefaultPageSettings.Landscape = (pageOrientation == PageOrientation.Landscape);

			if (batch.WaterMeters[0].Compound())
			{
				rsltItems = Results.ItemSpec.FromStrArray(Program.LocalSettings.RsltItems_Printer_CombinedWM);
			}
			else
			{
				rsltItems = Results.ItemSpec.FromStrArray(Program.LocalSettings.RsltItems_Printer_SingleWM);
			}

			/// Set print area size and margins (in dots using 80 dpi)
			int printHeight = base.DefaultPageSettings.PaperSize.Height - base.DefaultPageSettings.Margins.Top - base.DefaultPageSettings.Margins.Bottom;
			int printWidth = base.DefaultPageSettings.PaperSize.Width - base.DefaultPageSettings.Margins.Left - base.DefaultPageSettings.Margins.Right;
			int leftMargin = base.DefaultPageSettings.Margins.Left;	/// X
			int topMargin = base.DefaultPageSettings.Margins.Top;		/// Y

			/// Check if the user selected to print in Landscape mode
			/// if they did then we need to swap height/width parameters
			if (DefaultPageSettings.Landscape)
			{
				int tmp = printHeight;
				printHeight = printWidth;
				printWidth = tmp;
			}

			/// One watermeter per label/page
			nrPages = batch.WaterMeters.Count;

			pageNr = 1;
			nextWMNr = 0;
		}


		/// <summary>
		/// Override the default onbeginPrint method of the PrintDocument Object
		/// </summary>
		/// <param name=e></param>
		/// <remarks></remarks>
		protected override void OnBeginPrint(System.Drawing.Printing.PrintEventArgs e)
		{
			base.OnBeginPrint(e);

			if (font == null) { font = new Font(FontFamilyName, FontSize, FontStyle.Regular); }
		}


		/// <summary>
		/// Override the default OnPrintPage method of the PrintDocument.
		/// </summary>
		/// <param name=e></param>
		/// <remarks>This provides the print logic for our document</remarks>
		protected override void OnPrintPage(System.Drawing.Printing.PrintPageEventArgs e)
		{
			/// Run base code
			base.OnPrintPage(e);

			if (File.Exists(templateFile))
			{
				Image img = Image.FromFile(templateFile);
				e.Graphics.DrawImage(new Bitmap(img), new Rectangle(0, 0, paperWidth, paperHeight));
			}

			/// Set print area size and margins (in dots using 80 dpi)
			int printHeight = base.DefaultPageSettings.PaperSize.Height - base.DefaultPageSettings.Margins.Top - base.DefaultPageSettings.Margins.Bottom;
			int printWidth = base.DefaultPageSettings.PaperSize.Width - base.DefaultPageSettings.Margins.Left - base.DefaultPageSettings.Margins.Right;
			int leftMargin = base.DefaultPageSettings.Margins.Left;		/// X
			int topMargin = base.DefaultPageSettings.Margins.Top;		/// Y

			/// Check if the user selected to print in Landscape mode
			/// if they did then we need to swap height/width parameters
			if (base.DefaultPageSettings.Landscape)
			{
				int tmp = printHeight;
				printHeight = printWidth;
				printWidth = tmp;
			}

			int x = leftMargin;
			int y = topMargin;

			/// Use the StringFormat class for the text layout of our document
			StringFormat format = new StringFormat(StringFormatFlags.LineLimit);


			///--------
			///  Body
			///--------

			PrintWM(e, nextWMNr);
			nextWMNr++;
			e.HasMorePages = (nextWMNr < batch.WaterMeters.Count);
		}


		/// <summary>
		/// Print one water meter results
		/// </summary>
		/// <param name="wmNr">Water meter number (0-based)</param>
		void PrintWM(System.Drawing.Printing.PrintPageEventArgs e, int wmNr)
		{
			if (wmNr >= batch.WaterMeters.Count) return;

			Results.Entities.WaterMeter wm = batch.WaterMeters[wmNr];

			if (wm == null) return;


			/// Serial number
			if (!string.IsNullOrEmpty(wm.SerialNr)) PrintAt(e, 20, 62, wm.SerialNr);

			/// Watermeter type
			PrintAt(e, 20, 74, batch.ProtocolTitle);

			/// Date
			PrintAt(e, 135, 74, DateTimeStr(batch.EndTime));

			if (rsltItems.Count > 0)
			{
				int printPosition = 1;
				foreach (var mtr in wm.MeterTestRslts)
				{
					string itemText;

					if (!wm.Compound())
					{
						itemText = rsltItems[0].Print(mtr);
					}
					else if (mtr.CompoundMeterId == (byte)CompoundMeterId.Compound)
					{
						Results.Entities.MeterTestRslt mainMtr = wm.GetMeterTestRslt(mtr.Name(), CompoundMeterId.CompoundMain);
						Results.Entities.MeterTestRslt auxMtr = wm.GetMeterTestRslt(mtr.Name(), CompoundMeterId.CompoundMain);
						itemText = rsltItems[0].PrintCombined(mainMtr, auxMtr, mtr);
					}
					else
					{
						continue;
					}

					string[] texts = itemText.Split(new char[] { '|' });

					if (texts.Length == 2)
					{
						Color color = texts[1].Equals("Green") ? Color.Green : (texts[1].Equals("Red") ? Color.Red : Color.White);
						itemText = texts[0];
						/// TODO: How to print colors?
					}

					PrintAt(e, 78, 6 + 14 * printPosition, string.Format("{0}%", itemText));
					printPosition++;
				}
			}
		}


		void PrintAt(System.Drawing.Printing.PrintPageEventArgs e, Point p, string text)
		{
			PrintAt(e, p.X, p.Y, text);
		}


		void PrintAt(System.Drawing.Printing.PrintPageEventArgs e, int x, int y, string text)
		{
			RectangleF printArea = new RectangleF(x, y, 667, 18);
			e.Graphics.DrawString(text, this.font, Brushes.Black, printArea);
		}


		string DateTimeStr(DateTime dateTime)
		{
			return string.Format("{0}/{1}/{2}", dateTime.Day.ToString("D2"), dateTime.Month.ToString("D2"), (dateTime.Year % 100).ToString("D2"));
		}
	}
}