///
/// 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
		///
		readonly GenericDevices.IBenchInfo benchId;
		readonly Procedure procedure;
		readonly IList<TestResult> unsortedResults;
		readonly bool combined;
		readonly DateTime dateTime;

		///
		/// Items to print
		///
        readonly IList<Config.ResultItemSpec> resultItems;

		///
		/// 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(GenericDevices.IBenchInfo benchId,
								  Procedure procedure,
								  IList<TestResult> unsortedResults,
								  PageOrientation pageOrientation,
								  int paperWidth,
								  int paperHeight,
								  string templateFile)
		{
			this.benchId = benchId;
			this.procedure = procedure;
			this.unsortedResults = unsortedResults;
			this.paperWidth = paperWidth;
			this.paperHeight = paperHeight;
			this.templateFile = templateFile;

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

			dateTime = DateTime.Now;

			if ((unsortedResults != null) && (unsortedResults.Count != 0) && (unsortedResults[0].MetersKind == MetersKind.Single))
			{
                resultItems = Config.ResultItemSpec.FromStrArray(Program.LocalSettings.RsltItems_Printer_SingleWM);
				combined = false;
			}
			else
			{
                resultItems = Config.ResultItemSpec.FromStrArray(Program.LocalSettings.RsltItems_Printer_CombinedWM);
				combined = true;
			}


			/// 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 = (combined ? Config.Data.CompoundWMsCount : Config.Data.WMsCount);

			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
			///--------

			if (combined)
			{
				PrintCombinedWM(e, nextWMNr + 1);
				nextWMNr++;
				e.HasMorePages = (nextWMNr < Config.Data.CompoundWMsCount);
			}
			else
			{
                /// Skip disabled water meters
                while ((nextWMNr < Config.Data.WMsCount) && unsortedResults[0].Meters[nextWMNr].Disabled) nextWMNr++;

                if (nextWMNr < Config.Data.WMsCount)
				{
					PrintSingleWM(e, nextWMNr);

					bool anyMore = false;
					for (int i = nextWMNr + 1; i < Config.Data.WMsCount; i++)
					{
                        if (!unsortedResults[0].Meters[i].Disabled)
                        {
                            anyMore = true;
                            break;
                        }
					}
					e.HasMorePages = anyMore;
				}

				nextWMNr++;
			}
		}


		/// <summary>
		/// Print one water meter results
		/// </summary>
		/// <param name="wmNr">Water meter number (0-based)</param>
		void PrintSingleWM(System.Drawing.Printing.PrintPageEventArgs e, int wmNr)
		{
			/// Serial number
			if (!string.IsNullOrEmpty(unsortedResults[0].Meters[wmNr].SerialNr))
			{
				PrintAt(e, 20, 62, unsortedResults[0].Meters[wmNr].SerialNr);
			}

			/// Watermeter type
			PrintAt(e, 20, 74, unsortedResults[0].ProtocolTitle);

			/// Date
			string dateTimeStr = string.Format("{0}/{1}/{2}", dateTime.Day.ToString("D2"), dateTime.Month.ToString("D2"), (dateTime.Year % 100).ToString("D2"));
			PrintAt(e, 135, 74, dateTimeStr);

			IList<TestResult> results = Utils.GetSortedTestResults(procedure, unsortedResults, Utils.PartNr(wmNr+1, combined));

			for (int printPosition = 1; printPosition <= 3; printPosition++)
			{
				for (int r = 0; r < results.Count; r++)
				{
					if (results[r] != null && (r + 1) == printPosition)
					{
						if (resultItems.Count > 0)
						{
							string text = resultItems[0].Print(results[r].Meters[wmNr]);

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

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

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


		/// <summary>
		/// Print one combined water meter results
		/// </summary>
		/// <param name="wmNr1">Water meter number (1-based)</param>
		/// <param name="top">Top coordinate of watermeter data</param>
		/// <returns>The height of the printed section</returns>
		void PrintCombinedWM(System.Drawing.Printing.PrintPageEventArgs e, int wmNr1)
		{
			/// Serial number
			if (!string.IsNullOrEmpty(unsortedResults[0].Meters[2 * wmNr1 - 2].SerialNr))
			{
				PrintAt(e, 20, 62, unsortedResults[0].Meters[2 * wmNr1 - 2].SerialNr);
			}

			/// Watermeter type
			PrintAt(e, 20, 74, unsortedResults[0].ProtocolTitle);

			/// Date
			string dateTimeStr = string.Format("{0}/{1}/{2}", dateTime.Day.ToString("D2"), dateTime.Month.ToString("D2"), (dateTime.Year % 100).ToString("D2"));
			PrintAt(e, 135, 74, dateTimeStr);

			IList<TestResult> results = Utils.GetSortedTestResults(procedure, unsortedResults, Utils.PartNr(wmNr1, combined));

			for (int printPosition = 1; printPosition <= 3; printPosition++)
			{
				for (int r = 0; r < results.Count; r++)
				{
					if (results[r] != null && (r + 1) == printPosition)
					{
						if (resultItems.Count > 0)
						{
							string text = resultItems[0].PrintCombined(results[r].Meters[2 * wmNr1 - 2],
																	   results[r].Meters[2 * wmNr1 - 1],
																	   results[r].CombinedMeters[wmNr1 - 1]);
							string[] texts = text.Split(new char[] { '|' });

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

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


		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);
		}
	}
}