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package com.healthy.common.security.code.image;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import com.google.code.kaptcha.util.Config;
import com.healthy.common.security.code.ValidateCodeGenerator;
import com.healthy.common.security.properties.ImageCodeProperties;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.context.request.ServletWebRequest;

import java.awt.image.BufferedImage;
import java.util.Properties;

import static com.google.code.kaptcha.Constants.*;

/**
 * ImageCodeGenerator
 *
 * @author xiaomingzhang
 */
public class ImageCodeGenerator implements ValidateCodeGenerator {

    private ImageCodeProperties imageCodeProperties;

    @Override
    public ImageCode generate(ServletWebRequest request) {
        DefaultKaptcha defaultKaptcha = defaultKaptcha(request);
        String capText = defaultKaptcha.createText();
        BufferedImage image = defaultKaptcha.createImage(capText);
        return new ImageCode(image, capText, imageCodeProperties.getExpireIn());
    }

    private DefaultKaptcha defaultKaptcha(ServletWebRequest request) {
        DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
        Properties properties = new Properties();
        // 是否有边框 默认为true 我们可以自己设置yes，no
        properties.setProperty(KAPTCHA_BORDER, "yes");
        // 边框颜色 默认为Color.BLACK
        properties.setProperty(KAPTCHA_BORDER_COLOR, "105,179,90");
        // 验证码文本字符颜色 默认为Color.BLACK
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_COLOR, "blue");
        // 验证码图片宽度 默认为200
        properties.setProperty(KAPTCHA_IMAGE_WIDTH, String.valueOf(ServletRequestUtils.getIntParameter(request.getRequest(), "width", imageCodeProperties.getWidth())));
        // 验证码图片高度 默认为50
        properties.setProperty(KAPTCHA_IMAGE_HEIGHT, String.valueOf(ServletRequestUtils.getIntParameter(request.getRequest(), "height", imageCodeProperties.getWidth())));
        // 验证码文本字符大小 默认为40
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_SIZE, String.valueOf(ServletRequestUtils.getIntParameter(request.getRequest(), "font_size", imageCodeProperties.getFontSize())));
        // 验证码文本字符间距 默认为2
        properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_SPACE, "3");
        // 验证码文本字符长度 默认为5
        properties.setProperty(KAPTCHA_TEXTPRODUCER_CHAR_LENGTH, String.valueOf(imageCodeProperties.getLength()));
        // 验证码文本字体样式 默认为new Font("Arial", 1, fontSize), new Font("Courier", 1, fontSize)
        properties.setProperty(KAPTCHA_TEXTPRODUCER_FONT_NAMES, "Arial,Courier");
        // 验证码噪点颜色 默认为Color.BLACK
        properties.setProperty(KAPTCHA_NOISE_COLOR, "white");
        // 干扰实现类
        properties.setProperty(KAPTCHA_NOISE_IMPL, "com.google.code.kaptcha.impl.NoNoise");
        // 图片样式 水纹com.google.code.kaptcha.impl.WaterRipple 鱼眼com.google.code.kaptcha.impl.FishEyeGimpy 阴影com.google.code.kaptcha.impl.ShadowGimpy
        properties.setProperty(KAPTCHA_OBSCURIFICATOR_IMPL, "com.google.code.kaptcha.impl.ShadowGimpy");
        Config config = new Config(properties);
        defaultKaptcha.setConfig(config);
        return defaultKaptcha;
    }

    public void setImageCodeProperties(ImageCodeProperties imageCodeProperties) {
        this.imageCodeProperties = imageCodeProperties;
    }
}