///
/// Copyright (c) 2021 Sensus Slovensko a.s.
///
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Printing;
using Gma.QrCodeNet.Encoding;
using DataMatrix4Net;

namespace LabelPrinting.Printers
{
	public class DataMatrixAndTextPrintDoc : PrintDocument
	{
        const float mm = 1 / 0.254F;     /// 1 mm expressed in 1/100 inch

        int printWidth;
        int printHeight;
        int leftMargin;
        int topMargin;


        BitMatrix bitMatrix;
        string text;


        /// <summary>
		/// Constructor
		/// </summary>
        /// <param name="bitmap">Bitmap to be printed</param>
        /// <param name="paperWidth">Label width</param>
        /// <param name="paperHeight">Label height</param>
        /// <param name="landscape">true = landscape</param>
        public DataMatrixAndTextPrintDoc(BitMatrix bitMatrix, string text, bool landscape = false)
		{
            this.bitMatrix = bitMatrix;
            this.text = text;

            DefaultPageSettings.Landscape = landscape;

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

		protected override void OnBeginPrint(System.Drawing.Printing.PrintEventArgs e)
		{
            base.OnBeginPrint(e);   /// Run base code
		}

		protected override void OnPrintPage(System.Drawing.Printing.PrintPageEventArgs e)
		{
            base.OnPrintPage(e);    /// Run base code
            DrawLabel(e.Graphics, bitMatrix, text);
			e.HasMorePages = false;
		}

        public static void DrawLabel(Graphics g, BitMatrix bitMatrix, string text)
        {
            string[] lines = text.Split(new char[] { '\n' }); 

            /// Assuming 100 dpi (printer), drawing size: 2 inch (width) x 1 inch (height)
            const float W = 18 * mm;
            const float H = 10 * mm;
            
            const float L1 = 7.0f * mm;
            const float L2 = 7.0f * mm;
            const float T1 = 3.5f * mm;
            const float T2 = 5.5f * mm;

            const float QRL = 1.0f * mm;
            const float QRT = 2.5f * mm;
            const float QrSize = 5.5f * mm;

            string fontFamily = "Arial";
            Font font = new Font(fontFamily, 4.5f, FontStyle.Bold);

            g.SmoothingMode = SmoothingMode.AntiAlias;
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.PixelOffsetMode = PixelOffsetMode.HighQuality;

            g.Clear(Color.White);

            if (lines.Length > 0)
            {
                g.DrawString(lines[0], font, Brushes.Black, new RectangleF(L1, T1, W - L1, H - T1));
            }

            if (lines.Length > 1)
            {
                g.DrawString(lines[1], font, Brushes.Black, new RectangleF(L2, T2, W - L2, H - T2));
            }

            g.Flush();

            float QrPixSize = QrSize / bitMatrix.Width;
            for (int i = 0; i < bitMatrix.Height; i++)
            {
                for (int j = 0; j < bitMatrix.Width; j++)
                {
                    if (bitMatrix[j, i])
                    {
                        g.FillRectangle(Brushes.Black, new RectangleF(QRL + QrPixSize * j, QRT + QrPixSize * i, QrPixSize, QrPixSize));
                    }
                }
            }
        }
    }
}