using SharpCompress.Common;
using Spire.Barcode;
using Spire.Pdf;
using Spire.Pdf.Graphics;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static System.Formats.Asn1.AsnWriter;

namespace Business.Core.Utilities
{
    /// <summary>
    /// 二维码生成工具
    /// </summary>
    public class QRcodeHelper
    {
        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="context"></param>
        public void GenerateQrCode(string filePath, string context)
        {
            PdfDocument pdf = new PdfDocument();
            //读取文件
            pdf.LoadFromFile(filePath);
            PdfPageBase pb = pdf.Pages.Add();
            pdf.Pages.Remove(pb);

            //使用Spire.Barcode的BarcodeSettings和BarcodeGenerator类创建二维码图形
            Spire.Barcode.BarcodeSettings settings = new BarcodeSettings();
            settings.Type = BarCodeType.QRCode;
            settings.Data = context;
            settings.X = 0.7f;
            settings.LeftMargin = 0;
            settings.ShowText = false;
            settings.AutoResize=true;
            settings.ShowCheckSumChar = false;
            settings.QRCodeECL = QRCodeECL.Q;
            settings.QRCodeDataMode = QRCodeDataMode.Numeric;
            Spire.Barcode.BarCodeGenerator generator = new BarCodeGenerator(settings);
            Image image = generator.GenerateImage(new Size(20,20));

            //绘制二维码图形到PDF
            PdfImage pdfImage = PdfImage.FromImage(image);
            for (int i = 0; i < pdf.Pages.Count; i++)
            {
                var page = pdf.Pages[i];
                page.Canvas.DrawImage(pdfImage, page.Size.Width - pdfImage.Width + 9, 0);
            }

            //保存文档
            pdf.SaveToFile(filePath);
        }

        /// <summary>
        /// 生成条形码
        /// </summary>
        public void GenerateBarcode()
        { 
        
        }
    }
}