package monthlyusage

import (
	"context"
	"github.com/gogf/gf/v2/frame/g"
	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/fullsync/supply"
	"time"
)

func (p *Producer) observe(key, stage string, pending int, added, ended bool) {
	if p.observation != nil {
		p.observation.Event(key, stage, pending, added, ended, time.Now())
	}
}
func (p *Producer) startObservation(ctx context.Context, run string, keys []string, started time.Time) func(bool) {
	tracker := p.config.SupplyObservation
	if tracker == nil {
		return func(bool) {}
	}
	o := supply.New(newOwner(), started, keys)
	p.observation = o
	readCtx, readCancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
	meta, err := p.store.GetRunMeta(readCtx, run)
	readCancel()
	if err != nil {
		o.Partial()
	} else if meta.SupplyObservation != nil {
		o.Restore(*meta.SupplyObservation)
	}
	tracker.Put(run, o)
	stop := make(chan struct{})
	done := make(chan struct{})
	flush := func() {
		writeCtx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
		defer cancel()
		encoded, e := o.Encode()
		if e == nil {
			var saved bool
			saved, e = p.store.SaveSupply(writeCtx, run, p.config.RunLockKey, p.owner, encoded)
			if !saved && e == nil {
				o.Partial()
			}
		}
		if e != nil {
			o.Partial()
			g.Log().Warningf(writeCtx, "event=supply_observation status=partial runId=%s error=%q", run, e.Error())
		}
	}
	go func() {
		defer close(done)
		sampleTicker := time.NewTicker(time.Second)
		defer sampleTicker.Stop()
		flushTicker := time.NewTicker(10 * time.Second)
		defer flushTicker.Stop()
		for {
			select {
			case <-stop:
				return
			case <-ctx.Done():
				o.Partial()
				return
			case <-flushTicker.C:
				flush()
			case <-sampleTicker.C:
				views := o.Views()
				sampleCtx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
				samples, e := p.store.ReadSupply(sampleCtx, run, keys, time.Now())
				cancel()
				now := time.Now()
				for _, key := range keys {
					s := samples[key]
					if e != nil || !tracker.LocalConsumer || !tracker.ConsumerActive.Load() {
						s.Known = false
					}
					o.Apply(key, views[key], s, now)
				}
			}
		}
	}()
	return func(success bool) {
		close(stop)
		<-done
		if !success {
			o.Partial()
		}
		flush()
		tracker.Remove(run)
		p.observation = nil
	}
}