package com.dy.pmsBase.MarkQrCode;


import cn.hutool.core.codec.Base64;
import com.alibaba.excel.EasyExcel;
import com.dy.common.util.QrCodeGenerator;
import com.dy.common.webUtil.BaseResponse;
import com.dy.common.webUtil.BaseResponseUtils;
import com.dy.pmsGlobal.util.QrCodeConstant;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.awt.image.BufferedImage;
import java.io.File;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

/**
 * 生成标识类二维码
 */
@Slf4j
@RestController
@RequestMapping(path = "markQrCode")
@SuppressWarnings("unchecked")//java版本越高，对泛型约束越严，所以配置SuppressWarnings("unchecked")
public class MarkQrCodeCtrl {

    private static final String fileName = "标识类二维码" ;
    private static final String sheetName = "标识类二维码" ;

    /**
     * 客户端请求得到标识类二维码
     * @return
     */
    @GetMapping(path = "show")
    public BaseResponse<List<ResultVo>> show() {
        try{
            List<ResultVo> list = new ArrayList<>() ;
            Resource resource = new ClassPathResource("/images/logo.png");
            File logoPngFile = resource.getFile() ;
            String[][] marks = QrCodeConstant.Marks() ;
            for(String[] mark : marks){
                ResultVo vo = new ResultVo() ;
                vo.code = mark[0] ;
                vo.name = mark[1] ;
                //vo.code = "1234567890123456789012" ;
                //BufferedImage bufferedImage = QrCodeGenerator.toBufferedImage(QrCodeGenerator.createBitMatrix(vo.code, 30, 30));
                BufferedImage bufferedImage = QrCodeGenerator.toBufferedImage(QrCodeGenerator.createBitMatrix(vo.code, QrCodeConstant.MarkQrCodeWidth, QrCodeConstant.MarkQrCodeHeight));
                if(logoPngFile != null && logoPngFile.exists()){
                    bufferedImage = QrCodeGenerator.addQrCodeLogo(bufferedImage, logoPngFile);
                }
                byte[] codes = QrCodeGenerator.bufferedImageToByteArray(bufferedImage, "JPG");
                vo.imgBase64 = "data:image/jpeg;base64," + Base64.encode(codes);
                list.add(vo) ;
            }
            return BaseResponseUtils.buildSuccess(list);
        }catch (Exception e){
            log.error("生成标识类二维码时异常", e);
            return BaseResponseUtils.buildException(e.getMessage());
        }
    }

    /**
     * 客户端请求下载标识类二维码的excel文件
     * @return
     */
    @GetMapping(path = "download")
    public void download(HttpServletResponse response){
        try{
            // 这里注意 有同学反应使用swagger 会导致各种问题，请直接用浏览器或者用postman
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setCharacterEncoding("utf-8");
            // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
            String fileName = URLEncoder.encode(MarkQrCodeCtrl.fileName, "UTF-8").replaceAll("\\+", "%20");
            response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");

            List<ExcelVo> list = new ArrayList<>() ;
            Resource resource = new ClassPathResource("/images/logo.png");
            File logoPngFile = resource.getFile() ;
            String[][] marks = QrCodeConstant.Marks() ;
            for(String[] mark : marks){
                ExcelVo vo = new ExcelVo() ;
                vo.code = mark[0] ;
                vo.name = mark[1] ;
                BufferedImage bufferedImage = QrCodeGenerator.toBufferedImage(QrCodeGenerator.createBitMatrix(vo.code, QrCodeConstant.MarkQrCodeWidth, QrCodeConstant.MarkQrCodeHeight));
                if(logoPngFile != null && logoPngFile.exists()){
                    bufferedImage = QrCodeGenerator.addQrCodeLogo(bufferedImage, logoPngFile);
                }
                vo.image = QrCodeGenerator.bufferedImageToByteArray(bufferedImage, "JPG");
                list.add(vo) ;
            }
            EasyExcel.write(response.getOutputStream(), ExcelVo.class).sheet(MarkQrCodeCtrl.sheetName).doWrite(list);
        }catch (Exception e){
            log.error("下载标识类二维码时异常", e);
        }
    }
}