package com.xiaopeng.account.service.impl;

import com.google.code.kaptcha.Producer;
import com.xiaopeng.account.config.properties.CaptchaProperties;
import com.xiaopeng.account.service.IValidateCodeService;
import com.xiaopeng.common.core.constant.CacheConstants;
import com.xiaopeng.common.core.constant.Constants;
import com.xiaopeng.common.core.exception.CaptchaException;
import com.xiaopeng.common.core.utils.sign.Base64;
import com.xiaopeng.common.core.utils.uuid.IdUtils;
import com.xiaopeng.common.core.web.domain.AjaxResult;
import com.xiaopeng.common.redis.service.RedisService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.FastByteArrayOutputStream;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

/**
 * 验证码实现处理
 *
 * @author ruoyi
 */
@Service
public class ValidateCodeServiceImpl implements IValidateCodeService {

    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private RedisService redisService;

    @Autowired
    private CaptchaProperties captchaProperties;

    @Override
    public AjaxResult createCaptcha() throws IOException, CaptchaException {
        AjaxResult ajax = AjaxResult.success();
        boolean captchaEnabled = Boolean.TRUE.equals(captchaProperties.getEnabled());
        ajax.put("captchaEnabled", captchaEnabled);
        if (!captchaEnabled) {
            return ajax;
        }

        String uuid = IdUtils.simpleUUID();
        String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;

        String capStr = null;
        String code = null;
        BufferedImage image = null;

        String captchaType = captchaProperties.getType();
        if ("math".equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        } else {
            capStr = captchaProducer.createText();
            code = capStr;
            image = captchaProducer.createImage(capStr);
        }

        redisService.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);

        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return AjaxResult.error(e.getMessage());
        }

        ajax.put("uuid", uuid);
        ajax.put("img", Base64.encode(os.toByteArray()));
        return ajax;
    }
}