package main

import (
	"context"
	"flag"
	"fmt"
	"os"
	"os/signal"
	"time"

	"github.com/eosswedenorg/thalos/api"
	"github.com/eosswedenorg/thalos/api/message"
	_ "github.com/eosswedenorg/thalos/api/message/json"
	api_redis "github.com/eosswedenorg/thalos/api/redis"

	"github.com/go-redis/redis/v8"
	log "github.com/sirupsen/logrus"
)

var (
	interval time.Duration
	chain_id string

	redis_prefix string
	redis_url    string
	redis_db     int
)

func init() {
	flag.DurationVar(&interval, "interval", time.Minute, "How often the benchmark results should be displayed.")
	flag.StringVar(&chain_id, "chain_id", "1064487b3cd1a897ce03ae5b6a865651747e2e152090f99c1d19d44e01aea5a4", "")
	flag.StringVar(&redis_prefix, "prefix", "ship", "")

	flag.StringVar(&redis_url, "redis-url", "127.0.0.1:6379", "host:port to the redis server")
	flag.IntVar(&redis_db, "redis-db", 0, "What redis database we should connect to.")
}

func main() {
	var counter int = 0

	flag.Parse()

	log.WithFields(log.Fields{
		"url":      redis_url,
		"prefix":   redis_prefix,
		"chain_id": chain_id,
		"database": redis_db,
	}).Info("Connecting to redis")

	// Create redis client
	rdb := redis.NewClient(&redis.Options{
		Addr: redis_url,
		DB:   redis_db,
	})

	status := rdb.Ping(context.Background())

	if status.Err() != nil {
		log.Fatal("cant connect to redis: ", status.Err())
		return
	}

	log.Println("Connected to redis")

	log.WithFields(log.Fields{
		"interval": interval,
	}).Info("Starting benchmark")

	sub := api_redis.NewSubscriber(rdb, api_redis.Namespace{
		Prefix:  redis_prefix,
		ChainID: chain_id,
	})

	codec, err := message.GetCodec("json")
	if err != nil {
		log.Fatal(err)
		return
	}

	client := api.NewClient(sub, codec.Decoder)

	client.OnAction = func(act message.ActionTrace) {
		counter++
	}

	// Subscribe to all actions
	if err = client.Subscribe(api.ActionChannel{}.Channel()); err != nil {
		log.Fatal(err)
		return
	}

	go func() {
		t := time.Now()
		sig := make(chan os.Signal, 1)
		signal.Notify(sig, os.Interrupt)

		for {
			select {
			case <-sig:
				fmt.Println("Got interrupt")
				client.Close()
				return
			case now := <-time.After(interval):
				elapsed := now.Sub(t)
				t = now

				log.WithFields(log.Fields{
					"num_messages": counter,
					"elapsed":      elapsed,
					"msg_per_sec":  float64(counter) / elapsed.Seconds(),
					"msg_per_ms":   float64(counter) / float64(elapsed.Milliseconds()),
					"msg_per_min":  float64(counter) / elapsed.Minutes(),
				}).Info("Benchmark results")

				counter = 0
			}
		}
	}()

	// Read stuff.
	client.Run()
}