package svc

import (
	"cicv-data-closedloop/common/config/c_log"
	"cicv-data-closedloop/common/entity"
	commonUtil "cicv-data-closedloop/common/util"
	commonConfig "cicv-data-closedloop/pji/common/cfg"
	commonService "cicv-data-closedloop/pji/common/svc"
	masterConfig "cicv-data-closedloop/pji/master/package/cfg"
	"github.com/bluenviron/goroslib/v2"
	"github.com/bluenviron/goroslib/v2/pkg/msgs/std_msgs"
	"sync"
	"time"
)

// PrepareTimeWindowProducerQueue 负责监听所有主题并修改时间窗口
func PrepareTimeWindowProducerQueue() {

	var err error
	subscribers := make([]*goroslib.Subscriber, len(commonConfig.SubscribeTopics))
	subscribersTimes := make([]time.Time, len(commonConfig.SubscribeTopics))
	subscribersTimeMutexes := make([]sync.Mutex, len(commonConfig.SubscribeTopics))
	subscribersMutexes := make([]sync.Mutex, len(commonConfig.SubscribeTopics))
	for i, topic := range commonConfig.SubscribeTopics {
		c_log.GlobalLogger.Info("创建订阅者订阅话题：" + topic)
		if topic == masterConfig.TopicOfObstacleDetection {
			subscribers[i], err = goroslib.NewSubscriber(goroslib.SubscriberConf{
				Node:  commonConfig.RosNode,
				Topic: topic,
				Callback: func(data *std_msgs.UInt8) {
					if len(masterConfig.RuleOfObstacleDetection) == 0 {
						c_log.GlobalLogger.Infof("话题 %v 没有触发器", topic)
						return
					}
					subscribersTimeMutexes[i].Lock()
					if time.Since(subscribersTimes[i]).Seconds() > 1 {
						subscribersMutexes[i].Lock()
						faultHappenTime := commonUtil.GetNowTimeCustom() // 获取当前故障发生时间
						lastTimeWindow := entity.GetLastTimeWindow()     // 获取最后一个时间窗口
						var faultLabel string
						for _, f := range masterConfig.RuleOfObstacleDetection {
							faultLabel = f(data)
							if faultLabel != "" {
								saveTimeWindow(faultLabel, faultHappenTime, lastTimeWindow)
								break
							}
						}
						subscribersMutexes[i].Unlock()
					}
					subscribersTimeMutexes[i].Unlock()
				},
			})
		}
		if err != nil {
			c_log.GlobalLogger.Info("创建订阅者", masterConfig.TopicOfObstacleDetection, "发生故障：", err)
			//TODO 如何回传日志
			continue
		}
	}

	select {
	case signal := <-commonService.ChannelKillSubscriber:
		if signal == 1 {
			commonConfig.RosNode.Close()
			commonService.AddKillTimes("3")
			return
		}
	}
}

func saveTimeWindow(faultLabel string, faultHappenTime string, lastTimeWindow *entity.TimeWindow) {
	masterTopics, slaveTopics := getTopicsOfNode(faultLabel)
	if lastTimeWindow == nil || commonUtil.TimeCustom1GreaterTimeCustom2(faultHappenTime, lastTimeWindow.TimeWindowEnd) {
		// 2-1 如果是不在旧故障窗口内，添加一个新窗口
		newTimeWindow := entity.TimeWindow{
			FaultTime:       faultHappenTime,
			TimeWindowBegin: commonUtil.TimeCustomChange(faultHappenTime, -commonConfig.PlatformConfig.TaskBeforeTime),
			TimeWindowEnd:   commonUtil.TimeCustomChange(faultHappenTime, commonConfig.PlatformConfig.TaskAfterTime),
			Length:          commonConfig.PlatformConfig.TaskBeforeTime + commonConfig.PlatformConfig.TaskAfterTime + 1,
			Labels:          []string{faultLabel},
			MasterTopics:    masterTopics,
			SlaveTopics:     slaveTopics,
		}
		c_log.GlobalLogger.Infof("不在旧故障窗口内，向生产者队列添加一个新窗口，【Lable】=%v，【FaultTime】=%v，【Length】=%v", newTimeWindow.Labels, newTimeWindow.FaultTime, newTimeWindow.Length)
		entity.AddTimeWindowToTimeWindowProducerQueue(newTimeWindow)
	} else {
		// 2-2 如果在旧故障窗口内
		entity.TimeWindowProducerQueueMutex.RLock()
		defer entity.TimeWindowProducerQueueMutex.RUnlock()
		// 2-2-1 更新故障窗口end时间
		maxEnd := commonUtil.TimeCustomChange(lastTimeWindow.TimeWindowBegin, commonConfig.PlatformConfig.TaskMaxTime)
		expectEnd := commonUtil.TimeCustomChange(faultHappenTime, commonConfig.PlatformConfig.TaskAfterTime)
		if commonUtil.TimeCustom1GreaterTimeCustom2(expectEnd, maxEnd) {
			lastTimeWindow.TimeWindowEnd = maxEnd
			lastTimeWindow.Length = commonConfig.PlatformConfig.TaskMaxTime
		} else {
			if commonUtil.TimeCustom1GreaterTimeCustom2(expectEnd, lastTimeWindow.TimeWindowEnd) {
				lastTimeWindow.TimeWindowEnd = expectEnd
				lastTimeWindow.Length = commonUtil.CalculateDifferenceOfTimeCustom(lastTimeWindow.TimeWindowBegin, expectEnd)
			}
		}
		// 2-2-2 更新label
		labels := lastTimeWindow.Labels
		lastTimeWindow.Labels = commonUtil.AppendIfNotExists(labels, faultLabel)
		// 2-2-3 更新 topic
		sourceMasterTopics := lastTimeWindow.MasterTopics
		lastTimeWindow.MasterTopics = commonUtil.MergeSlice(sourceMasterTopics, masterTopics)
		sourceSlaveTopics := lastTimeWindow.SlaveTopics
		lastTimeWindow.SlaveTopics = commonUtil.MergeSlice(sourceSlaveTopics, slaveTopics)
		c_log.GlobalLogger.Infof("在旧故障窗口内，更新生产者队列最新的窗口，【Lable】=%v，【FaultTime】=%v，【Length】=%v", lastTimeWindow.Labels, lastTimeWindow.FaultTime, lastTimeWindow.Length)
	}
}

func getTopicsOfNode(faultLabel string) (masterTopics []string, slaveTopics []string) {
	// 获取所有需要采集的topic
	var faultCodeTopics []string
	for _, code := range commonConfig.CloudConfig.Triggers {
		if code.Label == faultLabel {
			faultCodeTopics = code.Topics
		}
	}
	return faultCodeTopics, nil
}