using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using ZXing;
using ZXing.Common;
using ZXing.OneD;
using ZXing.QrCode;
using ZXing.QrCode.Internal;

namespace Utility.Tools
{
    public class BarcodeHelper
    {
        static readonly string prefix = "data:image/png;base64,";
        public static Bitmap GetCodeBar(string txt, int width, int height, bool hideCode = false)
        {
            Code128EncodingOptions options = new Code128EncodingOptions()
            {
                Width = width,
                Height = height,
                Margin = 0,
                PureBarcode = hideCode,
                ForceCodesetB = true,
                GS1Format = false
            };

            BarcodeWriter writer = new BarcodeWriter
            {
                Format = BarcodeFormat.CODE_128,
                Options = options,
            };
            try
            {
                Bitmap map = writer.Write(txt);
                return map;
            }
            catch (Exception e)
            {
                var msg = e.Message;
                return null;
            }
        }

        /// <summary>
        /// 获取一维码的Base64内容【png格式】
        /// </summary>
        /// <param name="txt"></param>
        /// <param name="width"></param>
        /// <param name="height"></param>
        /// <param name="hideCode"></param>
        /// <returns></returns>
        public static string GetCodeBarBase64(string txt, int width, int height, bool hideCode = false)
        {
            Bitmap map = GetCodeBar(txt, width, height, hideCode);
            if (map == null)
            {
                return string.Empty;
            }
            MemoryStream stream = new MemoryStream();
            try
            {
                map.Save(stream, ImageFormat.Png);
                string re = $"{prefix}{Convert.ToBase64String(stream.ToArray())}";
                return re;
            }
            catch (Exception)
            {
                return string.Empty;
            }
            finally
            {
                map.Dispose();
                stream.Dispose();
            }
        }
        /// <summary>
        /// 获取二维码QR
        /// </summary>
        /// <param name="txt"></param>
        /// <param name="width"></param>
        /// <param name="height"></param>
        /// <returns></returns>
        public static Bitmap GetQrCode(string txt, int width, int height)
        {
            QrCodeEncodingOptions options = new QrCodeEncodingOptions()
            {
                DisableECI = true,//设置内容编码
                CharacterSet = "UTF-8",  //设置二维码的宽度和高度
                Width = width,
                Height = height,
                ErrorCorrection = ErrorCorrectionLevel.H,
                Margin = 0//设置二维码的边距,单位不是固定像素
            };
            BarcodeWriter writer = new BarcodeWriter
            {
                Format = BarcodeFormat.QR_CODE,
                Options = options
            };
            try
            {
                Bitmap map = writer.Write(txt);
                return map;
            }
            catch (Exception)
            {
                return null;
            }
        }

        /// <summary>
        /// 获取二维码QR的Base64内容【png格式】
        /// </summary>
        /// <param name="txt"></param>
        /// <param name="width"></param>
        /// <param name="height"></param>
        /// <returns></returns>
        public static string GetQrCodeBase64(string txt, int width, int height)
        {
            Bitmap map = GetQrCode(txt, width, height);
            if (map == null)
            {
                return string.Empty;
            }
            MemoryStream stream = new MemoryStream();
            try
            {
                map.Save(stream, ImageFormat.Png);
                string re = $"{prefix}{Convert.ToBase64String(stream.ToArray())}";
                return re;
            }
            catch (Exception)
            {
                return string.Empty;
            }
            finally
            {
                map.Dispose();
                stream.Dispose();
            }
        }

        /// <summary>
        /// 获取识别一维码或二维码的结果
        /// </summary>
        /// <param name="base64"></param>
        /// <returns></returns>
        public static string GetDecode(string base64)
        {
            string re = string.Empty;
            var bts = Convert.FromBase64String(base64);
            MemoryStream stream = new MemoryStream(bts);
            var map = (Bitmap)Image.FromStream(stream);
            //
            var reader = new BarcodeReader();
            try
            {
                var result = reader.Decode(map);
                if (result != null)
                {
                    re = $"{result.BarcodeFormat}:{result.Text}";
                }
                return re;
            }
            catch (Exception)
            {
                return re;
            }
            finally
            {
                stream.Dispose();
                map.Dispose();
            }
        }
    }
}