package com.genersoft.iot.vmp.gb28181.transmit.event.request.impl.message.notify.cmd;

import com.genersoft.iot.vmp.common.VideoManagerConstants;
import com.genersoft.iot.vmp.conf.DynamicTask;
import com.genersoft.iot.vmp.conf.UserSetting;
import com.genersoft.iot.vmp.gb28181.bean.Device;
import com.genersoft.iot.vmp.gb28181.bean.ParentPlatform;
import com.genersoft.iot.vmp.gb28181.bean.RemoteAddressInfo;
import com.genersoft.iot.vmp.gb28181.transmit.event.request.SIPRequestProcessorParent;
import com.genersoft.iot.vmp.gb28181.transmit.event.request.impl.message.IMessageHandler;
import com.genersoft.iot.vmp.gb28181.transmit.event.request.impl.message.notify.NotifyMessageHandler;
import com.genersoft.iot.vmp.gb28181.utils.SipUtils;
import com.genersoft.iot.vmp.service.IDeviceService;
import com.genersoft.iot.vmp.utils.DateUtil;
import gov.nist.javax.sip.message.SIPRequest;
import org.apache.commons.lang3.ObjectUtils;
import org.dom4j.Element;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.sip.InvalidArgumentException;
import javax.sip.RequestEvent;
import javax.sip.SipException;
import javax.sip.message.Response;
import java.text.ParseException;

/**
 * 状态信息(心跳)报送
 */
@Component
public class KeepaliveNotifyMessageHandler extends SIPRequestProcessorParent implements InitializingBean, IMessageHandler {


    private final Logger logger = LoggerFactory.getLogger(KeepaliveNotifyMessageHandler.class);
    private final static String cmdType = "Keepalive";

    @Autowired
    private NotifyMessageHandler notifyMessageHandler;

    @Autowired
    private IDeviceService deviceService;

    @Autowired
    private UserSetting userSetting;

    @Autowired
    private DynamicTask dynamicTask;

    @Override
    public void afterPropertiesSet() throws Exception {
        notifyMessageHandler.addHandler(cmdType, this);
    }

    @Override
    public void handForDevice(RequestEvent evt, Device device, Element element) {
        if (device == null) {
            // 未注册的设备不做处理
            return;
        }
        SIPRequest request = (SIPRequest) evt.getRequest();
        logger.info("[收到心跳]， device: {}, callId: {}", device.getDeviceId(), request.getCallIdHeader().getCallId());

        // 回复200 OK
        try {
            responseAck(request, Response.OK);
        } catch (SipException | InvalidArgumentException | ParseException e) {
            logger.error("[命令发送失败] 心跳回复: {}", e.getMessage());
        }
        if (!ObjectUtils.isEmpty(device.getKeepaliveTime()) && DateUtil.getDifferenceForNow(device.getKeepaliveTime()) <= 3000L) {
            logger.info("[收到心跳] 心跳发送过于频繁，已忽略 device: {}, callId: {}", device.getDeviceId(), request.getCallIdHeader().getCallId());
            return;
        }

        RemoteAddressInfo remoteAddressInfo = SipUtils.getRemoteAddressFromRequest(request, userSetting.getSipUseSourceIpAsRemoteAddress());
        if (!device.getIp().equalsIgnoreCase(remoteAddressInfo.getIp()) || device.getPort() != remoteAddressInfo.getPort()) {
            logger.info("[心跳] 设备{}地址变化, 远程地址为: {}:{}", device.getDeviceId(), remoteAddressInfo.getIp(), remoteAddressInfo.getPort());
            device.setPort(remoteAddressInfo.getPort());
            device.setHostAddress(remoteAddressInfo.getIp().concat(":").concat(String.valueOf(remoteAddressInfo.getPort())));
            device.setIp(remoteAddressInfo.getIp());
            // 设备地址变化会引起目录订阅任务失效，需要重新添加
            if (device.getSubscribeCycleForCatalog() > 0) {
                deviceService.removeCatalogSubscribe(device);
                deviceService.addCatalogSubscribe(device);
            }
        }
        if (device.getKeepaliveTime() == null) {
            device.setKeepaliveIntervalTime(60);
        }else {
            long lastTime = DateUtil.yyyy_MM_dd_HH_mm_ssToTimestamp(device.getKeepaliveTime());
            if (System.currentTimeMillis()/1000-lastTime > 10) {
                device.setKeepaliveIntervalTime(Long.valueOf(System.currentTimeMillis()/1000-lastTime).intValue());
            }
        }

        device.setKeepaliveTime(DateUtil.getNow());

        if (device.isOnLine()) {
            deviceService.updateDevice(device);
        }else {
            // 对于已经离线的设备判断他的注册是否已经过期
            if (!deviceService.expire(device)){
                device.setOnLine(false);
                deviceService.online(device, null);
            }
        }
        // 刷新过期任务
        String registerExpireTaskKey = VideoManagerConstants.REGISTER_EXPIRE_TASK_KEY_PREFIX + device.getDeviceId();
        // 如果三次心跳失败，则设置设备离线
        dynamicTask.startDelay(registerExpireTaskKey, ()-> deviceService.offline(device.getDeviceId(), "三次心跳失败"), device.getKeepaliveIntervalTime()*1000*3);

    }

    @Override
    public void handForPlatform(RequestEvent evt, ParentPlatform parentPlatform, Element element) {
        // 个别平台保活不回复200OK会判定离线
        try {
            responseAck((SIPRequest) evt.getRequest(), Response.OK);
        } catch (SipException | InvalidArgumentException | ParseException e) {
            logger.error("[命令发送失败] 心跳回复: {}", e.getMessage());
        }
    }
}