package collector_go

import (
	"context"
	confMng "loafle.com/overflow/agent_api/config_manager"
	"loafle.com/overflow/crawler_go/grpc"
	crm "loafle.com/overflow/crawler_manager_go"
	s "loafle.com/overflow/scheduler_go"
	"log"
	"strconv"
	"sync"
	"time"
)

var (
	instance *Collector
	once     sync.Once
)

func init() {
	go handleConfigLoaded()
}

func GetInstance() *Collector {
	once.Do(func() {
		instance = &Collector{}
	})
	return instance
}

type Collector struct {
	scheduler *s.Scheduler
	cm        confMng.ConfigManager

	startSensorCh     chan interface{}
	stopSensorCh      chan interface{}
	addSensorCh       chan interface{}
	remSensorCh       chan interface{}
	updateSensorCh    chan interface{}
	crmSensorUpdateCh chan interface{}
	crmUpdateCh       chan interface{}
	crmUpdateDoneCh   chan interface{}
}

func (c *Collector) start(conf confMng.ConfigManager) {
	go func() {
		c.cm = conf
		c.scheduler = &s.Scheduler{}
		c.scheduler.Start()
		c.addObservers()
		c.notifyCollectorReady()

		for _, conf := range c.cm.GetSensors() {
			if err := c.addSensor(conf.Id); err != nil {
				log.Println(err)
			}
		}
	}()
}

func (c *Collector) addObservers() {

	c.startSensorCh = make(chan interface{})
	c.stopSensorCh = make(chan interface{})
	c.addSensorCh = make(chan interface{})
	c.remSensorCh = make(chan interface{})
	c.updateSensorCh = make(chan interface{})
	c.crmSensorUpdateCh = make(chan interface{})
	c.crmUpdateCh = make(chan interface{})
	c.crmUpdateDoneCh = make(chan interface{})

	go c.handleAgentWillStop()
	go c.handleSensorStart()
	go c.handleSensorStop()
	go c.handleSensorAdd()
	go c.handleSensorRemove()
	go c.handleSensorUpdate()
	go c.handleCrmSensorUpdateDone()
	go c.handleCrawlerUpdate()
	go c.handleCrawlerUpdateDone()
}

func (c *Collector) Stop(d interface{}) {
	c.cleanObserver(c.addSensorCh, c.remSensorCh)
	c.scheduler.RemoveAllSchedule()
	c.scheduler.Stop()
	c.notifyCollectorStopped()
}

func (c *Collector) collect(id string) {

	conf := c.cm.GetSensorById(id)
	log.Printf("COLLECT %s - [ID: %s] [Crawler : %s]", time.Now(), conf.Id, conf.Crawler.Name)
	conn, err := crm.GetInstance().GetClient(conf.Crawler.Container)
	if err != nil {
		log.Println(err)
	}
	defer conn.Close()

	dc := grpc.NewDataClient(conn)
	in := &grpc.Input{}

	in.Id = id
	in.Name = grpc.Crawlers(grpc.Crawlers_value[conf.Crawler.Name])

	out, err := dc.Get(context.Background(), in)

	if err != nil {
		log.Println(err)
	}
	log.Println(out)

	c.notifyData(out)
}

func (c *Collector) addSensor(sensorId string) error {
	sensor := c.cm.GetSensorById(sensorId)
	interval, err := strconv.Atoi(sensor.Schedule.Interval)
	if err != nil {
		return err
	}
	return c.scheduler.NewSchedule(sensorId, uint64(interval), c.collect)
}

func (c *Collector) removeSensor(id string) {
	if err := c.scheduler.RemoveSchedule(id); err != nil {
		log.Println(err)
	}
}

func (c *Collector) updateSensor(id string) {
	//update
}