package com.zy.system.entity.license;

import com.zy.system.entity.LicenseInfos;
import com.zy.system.service.LicenseInfosService;
import com.zy.system.timer.LicenseTimer;
import de.schlichtherle.license.LicenseContent;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;

import java.util.Date;

/**
 * 在项目启动时安装证书
 */
@Component
public class LicenseCheckListener implements ApplicationListener<ContextRefreshedEvent> {
    private static Logger logger = LogManager.getLogger(LicenseCheckListener.class);

    /**
     * 证书subject
     */
    @Value("${license.subject}")
    private String subject;

    /**
     * 公钥别称
     */
    @Value("${license.publicAlias}")
    private String publicAlias;

    /**
     * 访问公钥库的密码
     */
    @Value("${license.storePass}")
    private String storePass;

    @Value("${license.publicKeysStorePath}")
    private String publicKeysStorePath;
    @Autowired
    private LicenseTimer licenseTimer;
    @Autowired
    private LicenseInfosService licenseInfosService;

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        //root application context 没有parent
        ApplicationContext context = event.getApplicationContext().getParent();
        if(context == null){
            loadLicense();
        }
    }

    //加载证书
    public boolean loadLicense() {
        return loadLicense(true);
    }

    public boolean loadLicense(boolean fetchRemote) {
        logger.info("++++++++ 开始加载许可证 ++++++++");

        if (fetchRemote) {
            try {
                licenseTimer.getRemoteLicense();
            } catch (Exception ignored) {
            }
        }

        try {
            LicenseVerifyParam param = new LicenseVerifyParam();
            param.setSubject(subject);
            param.setPublicAlias(publicAlias);
            param.setStorePass(storePass);
            param.setPublicKeysStorePath(publicKeysStorePath);

            LicenseVerify licenseVerify = new LicenseVerify();
            String requestCode = LicenseUtils.buildRequestCode(subject);
            LicenseInfos latestLicense = licenseInfosService.getLatestLicenseByRequestCode(requestCode);

            LicenseContent install = null;
            if (latestLicense != null && latestLicense.getLicense() != null && !latestLicense.getLicense().trim().isEmpty()) {
                install = licenseVerify.install(param, latestLicense.getLicense().trim());
            }
            if (install == null) {
                logger.info("许可证不存在");
                licenseTimer.setSystemSupport(false);
                licenseTimer.setLicenseDays(0);
                return false;
            }

            logger.info("++++++++ 许可证加载结束 ++++++++");

            licenseTimer.setSystemSupport(true);

            Date start = new Date();
            Date end = install.getNotAfter();
            Long starTime = start.getTime();
            Long endTime = end.getTime();
            Long num = endTime - starTime;//时间戳相差的毫秒数
            int day = (int) (num / 24 / 60 / 60 / 1000);
            licenseTimer.setLicenseDays(day);
            return true;
        } catch (Exception e) {
            logger.error("许可证加载失败", e);
            licenseTimer.setSystemSupport(false);
            licenseTimer.setLicenseDays(0);
            return false;
        }
    }
}