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package org.aoju.bus.extra.captcha;

import java.awt.*;
import java.io.OutputStream;
import java.util.Random;

/**
 * 验证码工具类
 *
 * @author Kimi Liu
 * @version 5.6.9
 * @since JDK 1.8+
 */
public class CaptchaUtils {

    /**
     * 输出验证码
     *
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String out(OutputStream outputStream) {
        return out(5, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param len          长度
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String out(int len, OutputStream outputStream) {
        return out(130, 48, len, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param len          长度
     * @param font         字体
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String out(int len, Font font, OutputStream outputStream) {
        return out(130, 48, len, font, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param width        宽度
     * @param height       高度
     * @param len          长度
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String out(int width, int height, int len, OutputStream outputStream) {
        return out(width, height, len, null, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param width        宽度
     * @param height       高度
     * @param len          长度
     * @param font         字体
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String out(int width, int height, int len, Font font, OutputStream outputStream) {
        int cType = new Random().nextInt(6);
        return outCaptcha(width, height, len, font, cType, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String outPng(OutputStream outputStream) {
        return outPng(5, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param len          长度
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String outPng(int len, OutputStream outputStream) {
        return outPng(130, 48, len, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param len          长度
     * @param font         字体
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String outPng(int len, Font font, OutputStream outputStream) {
        return outPng(130, 48, len, font, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param width        宽度
     * @param height       高度
     * @param len          长度
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String outPng(int width, int height, int len, OutputStream outputStream) {
        return outPng(width, height, len, null, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param width        宽度
     * @param height       高度
     * @param len          长度
     * @param font         字体
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    public static String outPng(int width, int height, int len, Font font, OutputStream outputStream) {
        int cType = new Random().nextInt(6);
        return outCaptcha(width, height, len, font, cType, outputStream);
    }

    /**
     * 输出验证码
     *
     * @param width        宽度
     * @param height       高度
     * @param len          长度
     * @param font         字体
     * @param cType        类型
     * @param outputStream OutputStream
     * @return 验证码结果
     */
    private static String outCaptcha(int width, int height, int len, Font font, int cType, OutputStream outputStream) {
        AbstractCaptcha captcha = null;
        if (cType == 0) {
            captcha = new SpecCaptcha(width, height, len);
        } else if (cType == 1) {
            captcha = new GifCaptcha(width, height, len);
        } else if (cType == 2) {
            captcha = new ChineseCaptcha(width, height, len);
        } else if (cType == 3) {
            captcha = new ChineseGifCaptcha(width, height, len);
        } else if (cType == 4) {
            captcha = new MathCaptcha(width, height, 4);
        } else if (cType == 5) {
            captcha = new MathGifCaptcha(width, height, 4);
        }
        if (font != null) {
            captcha.setFont(font);
        }
        captcha.out(outputStream);
        return captcha.text().toLowerCase();
    }

}