package com.license.entity.dto;

import de.schlichtherle.license.*;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.io.File;
import java.text.DateFormat;
import java.text.MessageFormat;
import java.text.SimpleDateFormat;
import java.util.prefs.Preferences;

/**
 * License校验类
 *
 * @author zifangsky
 * @date 2018/4/20
 * @since 1.0.0
 */
public class LicenseVerify {
    private static Logger logger = LogManager.getLogger(LicenseVerify.class);

    /**
     * 安装License证书
     *
     * @author zifangsky
     * @date 2018/4/20 16:26
     * @since 1.0.0
     */
    public synchronized LicenseContent install(LicenseVerifyParam param) throws Exception {
        LicenseContent result = null;
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        //1. 安装证书
        LicenseManager licenseManager = LicenseManagerHolder.getInstance(initLicenseParam(param));
        licenseManager.uninstall();
        result = licenseManager.install(new File(param.getLicensePath()));
        logger.info(MessageFormat.format("证书安装成功，证书有效期：{0} - {1}", format.format(result.getNotBefore()), format.format(result.getNotAfter())));
        return result;
    }

    /**
     * 校验License证书
     *
     * @return boolean
     * @author zifangsky
     * @date 2018/4/20 16:26
     * @since 1.0.0
     */
    public boolean verify() {
        LicenseManager licenseManager;
        try {
            licenseManager = LicenseManagerHolder.getInstance(null);
        } catch (Exception e) {
            throw new RuntimeException("目前项目已经到期，请及时续费哦~");
        }

        DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        //2. 校验证书
        try {
            LicenseContent licenseContent = licenseManager.verify();
            logger.info(MessageFormat.format("证书校验通过，证书有效期：{0} - {1}", format.format(licenseContent.getNotBefore()), format.format(licenseContent.getNotAfter())));
            return true;
        } catch (Exception e) {
            logger.error("证书校验失败！", e);
            throw new RuntimeException("目前项目已经到期，请及时续费哦~");
        }
    }

    /**
     * 初始化证书生成参数
     *
     * @param param License校验类需要的参数
     * @return de.schlichtherle.license.LicenseParam
     * @author zifangsky
     * @date 2018/4/20 10:56
     * @since 1.0.0
     */
    private LicenseParam initLicenseParam(LicenseVerifyParam param) {
        Preferences preferences = Preferences.userNodeForPackage(LicenseVerify.class);

        CipherParam cipherParam = new DefaultCipherParam(param.getStorePass());

        KeyStoreParam publicStoreParam = new CustomKeyStoreParam(LicenseVerify.class
                , param.getPublicKeysStorePath()
                , param.getPublicAlias()
                , param.getStorePass()
                , null);

        return new DefaultLicenseParam(param.getSubject()
                , preferences
                , publicStoreParam
                , cipherParam);
    }

}