package com.example.caseData.service;

import com.example.caseData.config.AppConfig;
import com.example.caseData.config.EnvConfig;
import com.example.caseData.exception.BusinessException;
import com.example.caseData.extend.aliyun.Oss;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Service;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.io.File;
import java.util.Date;
import java.util.Objects;

@Service
public class CertService  {
    @Resource
    private EnvConfig envConfig;

    // 生成证书
    public String createCert( byte[] avatarPath,
                             String sealPath,
                             String certificateNo,
                             String name,
                             String content,
                             byte[] qrCodeByte
    ){
        try {
            // 加载背景模板图片
            BufferedImage background = ImageIO.read(new File("src/main/resources/static/cert/template.png"));

            Graphics2D g2d = (Graphics2D) background.getGraphics();
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

            // 1. 添加证书编号
            Font font = new Font("Microsoft YaHei", Font.PLAIN, 40); // 可根据模板调整大小
            g2d.setFont(font);

            Color customColor = Color.decode("#008983");
            g2d.setColor(customColor);
            g2d.drawString(certificateNo, 285, 570);

            // 2. 处理并添加头像
            BufferedImage avatar = ImageIO.read(new ByteArrayInputStream(avatarPath));
            int size = 116; // 目标大小
            BufferedImage circleAvatar = createCircularImage(avatar, size);
            g2d.drawImage(circleAvatar, 465, 620, null);

            // 3. 添加姓名
            font = new Font("Microsoft YaHei", Font.PLAIN, 40); // 可根据模板调整大小
            g2d.setFont(font);

            customColor = Color.decode("#111827");
            g2d.setColor(customColor);
            g2d.drawString(name, 465, 790);

            // 4. 添加证书内容
            font = new Font("Microsoft YaHei", Font.PLAIN, 48); // 可根据模板调整大小
            g2d.setFont(font);

            customColor = Color.decode("#111827");
            g2d.setColor(customColor);
            drawStringWithLineBreak(g2d, content, 185, 880, 700, font); // 自动换行绘制文本

            // 5. 添加日期
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
            String currentDate = sdf.format(new Date());

            font = new Font("Microsoft YaHei", Font.PLAIN, 34); // 可根据模板调整大小
            g2d.setFont(font);

            customColor = Color.decode("#111827");
            g2d.setColor(customColor);
            g2d.drawString(currentDate, 700, 1277);

            // 6. 添加印章
            BufferedImage seal = ImageIO.read(new File(sealPath));
            seal = resize(seal, 264, 264); // 调整印章大小
            g2d.drawImage(seal, 645, 1150, null);

            // 6. 添加小程序二维码
            BufferedImage wechatMa = ImageIO.read(new ByteArrayInputStream(qrCodeByte));
            wechatMa = resize(wechatMa, 205, 205); // 调整印章大小
            g2d.drawImage(wechatMa, 80, 1450, null);

            // 释放资源
            g2d.dispose();

            // === 将图片转为 byte[] ===
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            ImageIO.write(background, "png", os);
            byte[] imageBytes = os.toByteArray();

            String fileName = "";
            if (Objects.equals(envConfig.getActive(), "dev")){
                 fileName = "dev/static/images/" + certificateNo + ".png";
            }else{
                 fileName = "prod/static/images/" + certificateNo + ".png";
            }

            boolean uploaded = Oss.putObject(fileName, imageBytes);
            if (uploaded) {
                // 返回可访问的 URL（假设你有自定义域名）
                // 格式：http://你的域名/文件名
                return "/" + fileName;
            }

//            // 保存最终的证书图片
//            ImageIO.write(background, "png", new File("cert.png"));
//            System.out.println("Certificate generated successfully!");
        } catch (IOException e) {
            throw new BusinessException(e.getMessage());
        }

        return null;
    }

    // 生成证书
    public String createCertTest(
                              String sealPath,
                              String certificateNo,
                              String name,
                              String content
    ){
        try {
            // 加载背景模板图片
            BufferedImage background = ImageIO.read(new File("src/main/resources/static/cert/template.png"));

            Graphics2D g2d = (Graphics2D) background.getGraphics();
            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

            // 1. 添加证书编号
            Font font = new Font("Microsoft YaHei", Font.PLAIN, 40); // 可根据模板调整大小
            g2d.setFont(font);

            Color customColor = Color.decode("#008983");
            g2d.setColor(customColor);
            g2d.drawString(certificateNo, 285, 570);

            // 2. 处理并添加头像
            BufferedImage avatar = ImageIO.read(new File("src/main/resources/static/cert/avt.png"));
            int size = 116; // 目标大小
            BufferedImage circleAvatar = createCircularImage(avatar, size);
            g2d.drawImage(circleAvatar, 465, 620, null);

            // 3. 添加姓名
            font = new Font("Microsoft YaHei", Font.PLAIN, 40); // 可根据模板调整大小
            g2d.setFont(font);

            customColor = Color.decode("#111827");
            g2d.setColor(customColor);
            g2d.drawString(name, 465, 790);

            // 4. 添加证书内容
            font = new Font("Microsoft YaHei", Font.PLAIN, 48); // 可根据模板调整大小
            g2d.setFont(font);

            customColor = Color.decode("#111827");
            g2d.setColor(customColor);
            drawStringWithLineBreak(g2d, content, 185, 880, 700, font); // 自动换行绘制文本

            // 5. 添加日期
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
            String currentDate = sdf.format(new Date());

            font = new Font("Microsoft YaHei", Font.PLAIN, 34); // 可根据模板调整大小
            g2d.setFont(font);

            customColor = Color.decode("#111827");
            g2d.setColor(customColor);
            g2d.drawString(currentDate, 700, 1277);

            // 6. 添加印章
            BufferedImage seal = ImageIO.read(new File(sealPath));
            seal = resize(seal, 264, 264); // 调整印章大小
            g2d.drawImage(seal, 645, 1150, null);

            // 6. 添加小程序二维码
            BufferedImage wechatMa = ImageIO.read(new File("src/main/resources/static/cert/weChatMa.png"));
            wechatMa = resize(wechatMa, 205, 205); // 调整印章大小
            g2d.drawImage(wechatMa, 80, 1450, null);

            // 释放资源
            g2d.dispose();

            // === 将图片转为 byte[] ===
//            ByteArrayOutputStream os = new ByteArrayOutputStream();
//            ImageIO.write(background, "png", os);
//            byte[] imageBytes = os.toByteArray();
//
//            String fileName = "";
//            if (Objects.equals(envConfig.getActive(), "dev")){
//                fileName = "dev/static/images/" + certificateNo + ".png";
//            }else{
//                fileName = "prod/static/images/" + certificateNo + ".png";
//            }
//
//            boolean uploaded = Oss.putObject(fileName, imageBytes);
//            if (uploaded) {
//                // 返回可访问的 URL（假设你有自定义域名）
//                // 格式：http://你的域名/文件名
//                return "/" + fileName;
//            }

//            // 保存最终的证书图片
            ImageIO.write(background, "png", new File("cert.png"));
            System.out.println("Certificate generated successfully!");
        } catch (IOException e) {
            throw new BusinessException(e.getMessage());
        }

        return null;
    }

    private static BufferedImage createCircularImage(BufferedImage originalImg, int size) {
        BufferedImage outputImage = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2 = outputImage.createGraphics();
        g2.setComposite(AlphaComposite.Src);
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setColor(Color.WHITE);
        g2.fill(new Ellipse2D.Float(0, 0, size, size));
        g2.setComposite(AlphaComposite.SrcAtop);
        g2.drawImage(originalImg.getScaledInstance(size, size, Image.SCALE_SMOOTH), 0, 0, null);
        g2.dispose();
        return outputImage;
    }

    private static BufferedImage resize(BufferedImage img, int newW, int newH) {
        Image tmp = img.getScaledInstance(newW, newH, Image.SCALE_SMOOTH);
        BufferedImage dimg = new BufferedImage(newW, newH, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g2d = dimg.createGraphics();
        g2d.drawImage(tmp, 0, 0, null);
        g2d.dispose();
        return dimg;
    }

    // 绘制带自动换行的字符串
    private static void drawStringWithLineBreak(Graphics2D g2d, String text, int x, int y, int maxWidth, Font font) {
        FontMetrics fm = g2d.getFontMetrics(font);
        StringBuilder line = new StringBuilder();
        String[] words = text.split("");

        for (String word : words) {
            int lineWidth = fm.stringWidth(line + word);
            if (lineWidth < maxWidth) {
                line.append(word);
            } else {
                g2d.drawString(line.toString(), x, y);
                y += fm.getHeight();
                line = new StringBuilder(word);
            }
        }
        if (!line.isEmpty()) {
            g2d.drawString(line.toString(), x, y);
        }
    }


}