package com.genersoft.iot.vmp.media.zlm;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.genersoft.iot.vmp.gb28181.bean.SendRtpItem;
import com.genersoft.iot.vmp.gb28181.session.SsrcUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import java.util.HashMap;
import java.util.Map;

@Component
public class ZLMRTPServerFactory {

    private Logger logger = LoggerFactory.getLogger("ZLMRTPServerFactory");

    @Value("${media.rtp.udpPortRange}")
    private String udpPortRange;

    @Autowired
    private ZLMRESTfulUtils zlmresTfulUtils;

    private int[] udpPortRangeArray = new int[2];

    private int currentPort = 0;

    private Map<String, Integer> currentStreams = null;

    public int createRTPServer(String streamId) {
        if (currentStreams == null) {
            currentStreams = new HashMap<>();
            JSONObject jsonObject = zlmresTfulUtils.listRtpServer();
            JSONArray data = jsonObject.getJSONArray("data");
            if (data != null) {
                for (int i = 0; i < data.size(); i++) {
                    JSONObject dataItem = data.getJSONObject(i);
                    currentStreams.put(dataItem.getString("stream_id"), dataItem.getInteger("port"));
                }
            }
        }
        // 已经在推流
        if (currentStreams.get(streamId) != null) {
            Map<String, Object> closeRtpServerParam = new HashMap<>();
            closeRtpServerParam.put("stream_id", streamId);
            zlmresTfulUtils.closeRtpServer(closeRtpServerParam);
            currentStreams.remove(streamId);
        }

        Map<String, Object> param = new HashMap<>();
        int result = -1;
        int newPort = getPortFromUdpPortRange();
        param.put("port", newPort);
        param.put("enable_tcp", 1);
        param.put("stream_id", streamId);
        JSONObject jsonObject = zlmresTfulUtils.openRtpServer(param);

        if (jsonObject != null) {
            switch (jsonObject.getInteger("code")){
                case 0:
                    result= newPort;
                    break;
                case -300: // id已经存在, 可能已经在其他端口推流
                    Map<String, Object> closeRtpServerParam = new HashMap<>();
                    closeRtpServerParam.put("stream_id", streamId);
                    zlmresTfulUtils.closeRtpServer(closeRtpServerParam);
                    result = newPort;
                    break;
                case -400: // 端口占用
                    result= createRTPServer(streamId);
                    break;
                default:
                    logger.error("创建RTP Server 失败: " + jsonObject.getString("msg"));
                    break;
            }
        }else {
            //  检查ZLM状态
            logger.error("创建RTP Server 失败: 请检查ZLM服务");
        }
        return result;
    }

    public boolean closeRTPServer(String streamId) {
        boolean result = false;
        Map<String, Object> param = new HashMap<>();
        param.put("stream_id", streamId);
        JSONObject jsonObject = zlmresTfulUtils.closeRtpServer(param);
        if (jsonObject != null ) {
            if (jsonObject.getInteger("code") == 0) {
                result = jsonObject.getInteger("hit") == 1;
            }else {
                logger.error("关闭RTP Server 失败: " + jsonObject.getString("msg"));
            }
        }else {
            //  检查ZLM状态
            logger.error("关闭RTP Server 失败: 请检查ZLM服务");
        }
        return result;
    }

    private int getPortFromUdpPortRange() {
        if (currentPort == 0) {
            String[] udpPortRangeStrArray = udpPortRange.split(",");
            udpPortRangeArray[0] = Integer.parseInt(udpPortRangeStrArray[0]);
            udpPortRangeArray[1] = Integer.parseInt(udpPortRangeStrArray[1]);
        }

        if (currentPort == 0 || currentPort++ > udpPortRangeArray[1]) {
            currentPort = udpPortRangeArray[0];
            return udpPortRangeArray[0];
        } else {
            if (currentPort % 2 == 1) {
                currentPort++;
            }
            return currentPort++;
        }
    }

    /**
     * 创建一个国标推流
     * @param ip 推流ip
     * @param port 推流端口
     * @param ssrc 推流唯一标识
     * @param platformId 平台id
     * @param channelId 通道id
     * @param tcp 是否为tcp
     * @return SendRtpItem
     */
    public SendRtpItem createSendRtpItem(String ip, int port, String ssrc, String platformId, String deviceId, String channelId, boolean tcp){
        String playSsrc = SsrcUtil.getPlaySsrc();
        int localPort = createRTPServer(SsrcUtil.getPlaySsrc());
        if (localPort != -1) {
            closeRTPServer(playSsrc);
        }else {
            logger.error("没有可用的端口");
            return null;
        }
        SendRtpItem sendRtpItem = new SendRtpItem();
        sendRtpItem.setIp(ip);
        sendRtpItem.setPort(port);
        sendRtpItem.setSsrc(ssrc);
        sendRtpItem.setPlatformId(platformId);
        sendRtpItem.setDeviceId(deviceId);
        sendRtpItem.setChannelId(channelId);
        sendRtpItem.setTcp(tcp);
        sendRtpItem.setApp("rtp");
        sendRtpItem.setLocalPort(localPort);
        return sendRtpItem;
    }

    /**
     * 创建一个直播推流
     * @param ip 推流ip
     * @param port 推流端口
     * @param ssrc 推流唯一标识
     * @param platformId 平台id
     * @param channelId 通道id
     * @param tcp 是否为tcp
     * @return SendRtpItem
     */
    public SendRtpItem createSendRtpItem(String ip, int port, String ssrc, String platformId, String app, String stream, String channelId, boolean tcp){
        String playSsrc = SsrcUtil.getPlaySsrc();
        int localPort = createRTPServer(SsrcUtil.getPlaySsrc());
        if (localPort != -1) {
            closeRTPServer(playSsrc);
        }else {
            logger.error("没有可用的端口");
            return null;
        }
        SendRtpItem sendRtpItem = new SendRtpItem();
        sendRtpItem.setIp(ip);
        sendRtpItem.setPort(port);
        sendRtpItem.setSsrc(ssrc);
        sendRtpItem.setApp(app);
        sendRtpItem.setStreamId(stream);
        sendRtpItem.setPlatformId(platformId);
        sendRtpItem.setChannelId(channelId);
        sendRtpItem.setTcp(tcp);
        sendRtpItem.setLocalPort(localPort);
        return sendRtpItem;
    }

    /**
     * 调用zlm RESTful API —— startSendRtp
     */
    public Boolean startSendRtpStream(Map<String, Object>param) {
        Boolean result = false;
        JSONObject jsonObject = zlmresTfulUtils.startSendRtp(param);
        System.out.println(jsonObject);
        if (jsonObject == null) {
            logger.error("RTP推流失败: 请检查ZLM服务");
        } else if (jsonObject.getInteger("code") == 0) {
            result= true;
            logger.error("RTP推流请求成功，本地推流端口：" + jsonObject.getString("local_port"));
        } else {
            logger.error("RTP推流失败: " + jsonObject.getString("msg"));
        }
        return result;
    }

    /**
     * 查询待转推的流是否就绪
     */
    public Boolean isRtpReady(String streamId) {
        JSONObject mediaInfo = zlmresTfulUtils.getMediaInfo("rtp", "rtmp", streamId);
        return (mediaInfo.getInteger("code") == 0 && mediaInfo.getBoolean("online"));
    }

    /**
     * 查询待转推的流是否就绪
     */
    public Boolean isStreamReady(String app, String streamId) {
        JSONObject mediaInfo = zlmresTfulUtils.getMediaInfo(app, "rtmp", streamId);
        return (mediaInfo.getInteger("code") == 0 && mediaInfo.getBoolean("online"));
    }

    /**
     * 查询转推的流是否有其它观看者
     * @param streamId
     * @return
     */
    public int totalReaderCount(String app, String streamId) {
        JSONObject mediaInfo = zlmresTfulUtils.getMediaInfo(app, "rtmp", streamId);
        return mediaInfo.getInteger("totalReaderCount");
    }

    /**
     * 调用zlm RESTful API —— stopSendRtp
     */
    public Boolean stopSendRtpStream(Map<String, Object>param) {
        Boolean result = false;
        JSONObject jsonObject = zlmresTfulUtils.stopSendRtp(param);
        System.out.println(jsonObject);
        if (jsonObject == null) {
            logger.error("停止RTP推流失败: 请检查ZLM服务");
        } else if (jsonObject.getInteger("code") == 0) {
            result= true;
            logger.error("停止RTP推流成功");
        } else {
            logger.error("停止RTP推流失败: " + jsonObject.getString("msg"));
        }
        return result;
    }
}