using System;
using System.Runtime.Serialization;
using TMPro;
using UnityEngine;
using UnityEngine.UI;
using ZXing;

//生成二维码
public class QRCodeDrawing : MonoBehaviour
{
    public string VerificationCode;
    public RawImage QRCode;//绘制好的二维码
    public string QRCodeText = null;//二维码内容，自己填
    BarcodeWriter BarcodeWriter;//二维码绘制类
    public static QRCodeDrawing instance;
    public Button enter;
    public TMP_InputField text;
    private GameInit gameInit = new GameInit();
    private SetJson setJson = new SetJson();
    private void Start()
    {
        instance = this;
        VerificationCode = setJson.GenerateVerificationCode();

        QRCodeText = setJson.ReadUrl() + setJson.AssemblyField(VerificationCode, DateTimeOffset.Now.ToUnixTimeSeconds().ToString(), setJson.VersionNumber, setJson.AesKey);
        Debug.Log(QRCodeText);

        DrowQRCode(QRCodeText);
        enter.onClick.AddListener(() => 
        {
            verify(text.text, VerificationCode);
        });
    }


    /// <summary>
    /// 将制定字符串信息转换成二维码图片信息
    /// </summary>
    /// <param name="formatStr">要产生二维码的字符串信息</param>
    /// <param name="width">二维码的宽度</param>
    /// <param name="height">二维码的高度</param>
    /// <returns></returns>
    Color32[] GeneQRCode(string formatStr, int width, int height)
    {
        ZXing.QrCode.QrCodeEncodingOptions options = new ZXing.QrCode.QrCodeEncodingOptions();//绘制二维码之前 进行设置

        options.CharacterSet = "UTF-8";//设置字符编码，确保字符串信息保持正确

        options.Width = width;//设置二维码宽
        options.Height = height;//设置二维码高
        options.Margin = 0;//设置二维码留白(值越大，留白越大，二维码越小)

        BarcodeWriter = new BarcodeWriter { Format = BarcodeFormat.QR_CODE, Options = options };//实例化字符串绘制二维码工具

        return BarcodeWriter.Write(formatStr);
    }


    /// <summary>
    /// 根据二维码图片信息绘制制定字符串信息的二维码到指定区域
    /// </summary>
    /// <param name="str">字符串信息</param>
    /// <param name="width">二维码的宽度</param>
    /// <param name="height">二维码的高度</param>
    /// <returns></returns>
    Texture2D ShowQRCode(string str, int width, int height)
    {
        Texture2D texture = new Texture2D(width, height);

        Color32[] colors = GeneQRCode(str, width, height);

        texture.SetPixels32(colors);

        texture.Apply();

        return texture;
    }


    /// <summary>
    /// 绘制二维码
    /// </summary>
    /// <param name="formatStr">二维码信息</param>
    public void DrowQRCode(string formatStr)
    {
        Texture2D texture = ShowQRCode(formatStr, 256, 256);//注意：这个宽高度大小256不要变。不然生成的信息不正确
                                                            //256有可能是这个ZXingNet插件指定大小的绘制像素点数值
        QRCode.texture = texture;//显示到UI界面的图片上
    }

    /// <summary>
    ///验证登录场景
    /// </summary>
    /// <param name="formatStr">二维码信息</param>
    public void verify(string imformation1,string imformation2)
    {
        if (imformation1 == imformation2)
        {
            gameInit.LoadScene();
        }
        else
        {
            Debug.Log("验证码验证失败");
        }
    }
}