///
/// Copyright (c) 2018 Sensus Slovensko a.s.
///
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Printing;
using System.IO;
using Gma.QrCodeNet.Encoding;
using Config.Entities;
using Results.Resources;

namespace Results.Output.Printers.Label
{
	public class LabelPrintDocument : PrintersCommon
	{
        static QrEncoder encoder = new QrEncoder();

        /// Size of the printed area without margins, after taking into account 'pageOrientation'
		readonly int printHeight;
		readonly int printWidth;

		/// Selected font
		readonly Font font;

		/// Data to print
		Results.Entities.Batch batch;
		LabelPrinterCfg cfg;
        Results.Entities.WaterMeter wm;

		/// Items to print
        IList<WMeterRsltItemSpec> itemsToPrint;

		/// <summary>
		/// Constructor
		/// </summary>
		/// <param name="textToPrint">Text to be printed</param>
        public LabelPrintDocument(Results.Entities.Batch batch, LabelPrinterCfg cfg, Results.Entities.WaterMeter wm, string documentName)
		{
			DocumentName = documentName;

			this.batch = batch;
			this.cfg = cfg;
            this.wm = wm;
			this.itemsToPrint = Results.WMeterRsltItemSpec.FromStrArray(cfg.ItemsToPrint);

			/// Initialize fonts
			font = new Font((cfg.FontFamily != null ? cfg.FontFamily : "Arial"),
							(cfg.FontSize > 0 ? cfg.FontSize : 10),
							(FontStyle)cfg.FontStyle);

			/// Set print area size and margins (in dots using 100 dpi)
			DefaultPageSettings.Landscape = (cfg.PageOrientation == PageOrientation.Landscape);
			///
			printHeight = cfg.PaperHeight;
			printWidth = cfg.PaperWidth;
        }

		/// <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);
		}

		/// <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 (!string.IsNullOrEmpty(cfg.Template))
            {
                string templatePath = Path.Combine("C:\\TBF\\Templates\\", cfg.Template);
                if (File.Exists(templatePath))
                {
					e.Graphics.DrawImage(new Bitmap(Image.FromFile(templatePath), printWidth, printHeight), new Rectangle(0, 0, printWidth, printHeight));
                }
            }

			foreach (var item in itemsToPrint)
			{
				string[] coords = item.Caption.Split(new char[] { ';' });
				int x, y;
				if (coords.Length >= 2 && int.TryParse(coords[0].Trim(new char[] { ' ' }), out x)
									   && int.TryParse(coords[1].Trim(new char[] { ' ' }), out y))
				{
					RectangleF printArea = new RectangleF(x, y, printWidth, printHeight);
					e.Graphics.DrawString(item.Print(wm), this.font, Brushes.Black, printArea);
				}
			}

            if (cfg.DrawSNasBarcode)
            {
                if (cfg.IsQR)
                {
                    QrCode qrCode = encoder.Encode(wm.SerialNr);
                    DrawQR(e.Graphics, qrCode, cfg.BarcodeLeft, cfg.BarcodeTop, cfg.BarcodeWidth, cfg.BarcodeHeight);
                }
                else
                {
                    /// TODO
                }
            }
		}


        public static void DrawQR(Graphics g, QrCode qrCode, float left, float top, float width, float height)
        {
            /// Assuming 100 dpi (printer)
            g.SmoothingMode = SmoothingMode.AntiAlias;
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.PixelOffsetMode = PixelOffsetMode.HighQuality;

            float qrPixWidth = width / qrCode.Matrix.Width;
            float qrPixHeight = height / qrCode.Matrix.Height;
            for (int i = 0; i < qrCode.Matrix.Height; i++)
            {
                for (int j = 0; j < qrCode.Matrix.Width; j++)
                {
                    if (qrCode.Matrix[j, i])
                    {
                        g.FillRectangle(Brushes.Black, new RectangleF(left + j * qrPixWidth,
                                                                      top + i * qrPixHeight,
                                                                      qrPixWidth,
                                                                      qrPixHeight));
                    }
                }
            }
        }
    }
}