package com.ard.sample.component.websocket.handler;

import com.ard.common.core.redis.RedisConst;
import com.ard.common.core.redis.RedisOpsUtils;
import com.ard.sample.common.model.ResponseResult;
import com.ard.sample.component.websocket.enums.MessageType;
import com.ard.sample.manage.model.dto.*;
import com.ard.sample.manage.service.IDeviceService;
import com.ard.sample.manage.service.ILiveStreamService;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

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

@Slf4j
@Component
public class LiveStreamHandler {
    @Autowired
    protected ObjectMapper _objectMapper;
    @Autowired
    private IDeviceService _deviceService;
    @Autowired
    private ILiveStreamService _liveStreamService;
    @Autowired
    private DockWebSocketHandler _dockWebSocketHandler;

    /**
     * 开启直播
     */
    public void StartLiveStreaming(String sn ,String userId) {
        //调用开始直播
        ResponseResult rlive = null;
        String resultLive = "";
        try {
            // 获取直播参数
            LiveTypeDTO param = getLiveParam(sn);
            // 判断param是否为空，不为空则返回正确的直播参数，为null则未获取直播参数，不为空则继续操作
            if (param == null) {
                log.info("SN: {}-未获取到直播参数param为null，无法开启直播！", sn);
                return;
            }
            // 如果存在直播则读取直播地址返回
            if (RedisOpsUtils.checkExist(RedisConst.WEBSOCKET_VIDEO_ADDRESS_PREFIX + sn)) {
                resultLive = String.valueOf(RedisOpsUtils.get(RedisConst.WEBSOCKET_VIDEO_ADDRESS_PREFIX + sn));
                log.info("SN: {}-redis中存在相机的播放地址信息，直接返回地址！", sn);
            } else {
                log.info("SN: {}-redis中未找到相机的播放地址信息！停止直播后再开启直播", sn);
                StopLiveStreaming(sn);
                // 如果不存在直播，则开始直播，并返回直播地址
                rlive = _liveStreamService.liveStart(param);
                if (rlive.getCode() == 0) {
                    // 直播成功后，在redis中存一个标记，将videoid保留，留给停止直播使用
                    log.info("SN: {}-开启直播成功！", sn);
                    rlive.setGateway(sn);
                    rlive.setType(MessageType.LIVESTREAM.getType());
                    resultLive = _objectMapper.writeValueAsString(rlive);
                    RedisOpsUtils.set(RedisConst.WEBSOCKET_VIDEO_ADDRESS_PREFIX + sn, resultLive);
                    LiveDTO live = (LiveDTO) rlive.getData();
                    Boolean isWeb = _deviceService.updateWebrtcUrl(sn,live.getWebrtcUrl());
                    if (isWeb) {
                        log.info("SN: {}-更新webrtc地址成功！", sn);
                    }
                }
                else {
                    log.info("SN: {}-开启直播失败！返回值：{}", sn, rlive);
                }
            }
            _dockWebSocketHandler.sendMessageToSubscribers(sn, MessageType.LIVESTREAM.getType(), resultLive, userId);
            log.info("SN: {}-直播地址：{}", sn, resultLive);
        } catch (Exception e) {
            log.info("SN: {}-开启直播失败！原因：{}", sn, e.getMessage());
            e.printStackTrace();
        }
    }

    public void StopLiveStreaming(String sn) {
        ResponseResult rlive = null;
        try {
            // 获取直播参数
            LiveTypeDTO param = getLiveParam(sn);
            // 停止直播逻辑
            rlive = _liveStreamService.liveStop(param.getVideoId());
            log.info("SN: {}-停止直播！返回值：{}", sn, rlive);
        } catch (Exception e) {
            log.info("SN: {}-停止直播时发生异常，原因：{}", sn, e.getMessage(), e);
        } finally {
            // 无论停流是否成功都清理缓存地址：
            // 设备离线等原因导致停流异常时，若不清 Redis，后续订阅会直接拿到失效地址，
            // 页面持续黑屏，只有等设备离线清理缓存后才能恢复
            RedisOpsUtils.del(RedisConst.WEBSOCKET_VIDEO_ADDRESS_PREFIX + sn);
            log.info("SN: {}-已删除redis直播信息！", sn);
        }
    }

    public String getResult(String sn, String msg) {
        Map<String, String> result = new HashMap<>();
        result.put("gateway", sn);
        result.put("code", "1");
        result.put("message", msg);
        result.put("data", null);
        result.put("type", MessageType.LIVESTREAM.getType());
        // 将Map转换为JSON字符串
        String jsonString = "";
        try {
            jsonString = _objectMapper.writeValueAsString(result);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return jsonString;
    }

    /**
     * 获取直播参数
     */
    public LiveTypeDTO getLiveParam(String sn) throws Exception {
        LiveTypeDTO param = new LiveTypeDTO();
        // 检查设备是否在线
        if (!_deviceService.checkDeviceOnline(sn)) {
            log.info("SN: {}-设备不在线，请检查网络连接！", sn);
            // 抛弃出异常，给调用者处理
            throw new Exception("设备不在线，请检查网络连接！");
        }
        // 读取直播能力拼接参数
        List<CapacityDeviceDTO> devicesList = _liveStreamService.getLiveCapacity();
        if (devicesList == null || devicesList.isEmpty()) {
            log.info("SN: {}-未获得设备直播能力！", sn);
            return null;
            // 抛弃出异常，给调用者处理
            // throw new Exception("未获得设备直播能力！");
        }
        for (CapacityDeviceDTO device : devicesList) {
            if (!device.getSn().equals(sn)) {
                continue;
            }
            List<CapacityCameraDTO> camerasList = device.getCamerasList();
            if (camerasList == null || camerasList.isEmpty()) {
                continue;
            }
            for (CapacityCameraDTO camera : camerasList) {
                List<CapacityVideoDTO> videosList = camera.getVideosList();
                if (videosList == null || videosList.isEmpty()) {
                    continue;
                }
                // 机场1：M30 / M30T 相机索引为 52-x-x / 53-x-x，live_capacity 可能同时上报
                // normal-0、zoom-0、ir-0 多条码流。默认优先选 normal 码流（可见光），
                // 避免原来“循环取最后一条”时默认落到红外。其他机型保持原行为（取最后一条）。
                boolean m30SeriesCamera = camera.getIndex() != null
                        && (camera.getIndex().startsWith("52-") || camera.getIndex().startsWith("53-"));
                CapacityVideoDTO selectedVideo = null;
                for (CapacityVideoDTO video : videosList) {
                    selectedVideo = video;
                    if (m30SeriesCamera && video.getIndex() != null
                            && video.getIndex().startsWith("normal")) {
                        break;
                    }
                }
                if (selectedVideo == null) {
                    continue;
                }
                List<String> switchVideoTypes = selectedVideo.getSwitchVideoTypes();
                if (switchVideoTypes == null || switchVideoTypes.isEmpty()) {
                    // 没有镜头类型信息时跳过该相机，避免 get(0) 越界
                    continue;
                }
                // 机场1：video_id 格式固定为 {sn}/{camera_index}/{video_index}。
                // 按选中的码流独立构造，单码流设备结果与原来完全一致。
                String videoid = device.getSn() + "/" + camera.getIndex() + "/" + selectedVideo.getIndex();
                param.setUrlType(1);
                param.setUrl("");
                param.setVideoId(videoid);
                param.setVideoQuality(1);
                param.setVideoType(switchVideoTypes.get(0));
            }
        }
        return param;
    }
}