package main

import (
	"flag"
	"os"
	"strings"

	"strconv"

	log "github.com/sirupsen/logrus"

	"io/ioutil"

	"gitea.difrex.ru/Umbrella/fetcher/i2es"
	"gitea.difrex.ru/Umbrella/fetcher/idec"
)

var (
	inode, es, esIndex, esType, addEchoes, blacklistFile string
	offset, limit                                        int
	all, reindex                                         bool
	denyMessages                                         []string
)

// init ...
func init() {
	flag.IntVar(&offset, "offset", 0, "<int>")
	flag.IntVar(&limit, "limit", -1, "<int>")
	flag.BoolVar(&all, "all", false, "Get all messages")
	flag.BoolVar(&reindex, "reindex", false, "Force update an a message")
	flag.StringVar(&inode, "inode", "https://ii-net.tk/ii/ii-point.php?q=/", "IDEC node URI")
	flag.StringVar(&es, "es", "http://127.0.0.1:9200", "ES host")
	flag.StringVar(&esIndex, "esindex", "idec", "ES index")
	flag.StringVar(&esType, "estype", "post", "ES document type")
	flag.StringVar(&addEchoes, "echoes", "", "Additional echoes to fetch. Comma separated")
	flag.StringVar(&blacklistFile, "blacklist", "/blacklist.txt", "Path to the blacklist file")
	flag.Parse()

	denyMessages = loadBlacklist()
}

func main() {
	// extensions := idec.NewExtensions()

	var fc idec.FetchConfig

	fc.Node = inode

	log.Print("Working for node: ", inode)
	// trying get echo list
	var echoes []string
	e, err := fc.GetEchoList()
	if err != nil {
		log.Error(err.Error())
		echoes = []string{"ii.14", "linux.14"}
	} else {
		for _, echo := range e {
			echoes = append(echoes, echo.Name)
		}
	}
	if addEchoes != "" {
		echoes = append(echoes, strings.Split(addEchoes, ",")...)
	}
	fc.Echoes = echoes

	log.Print("Receive echoelist: ", fc.Echoes)

	fc.Num = 10
	fc.Limit = limit
	fc.Offset = offset

	var elastic i2es.ESConf
	elastic.Host = es
	elastic.Index = esIndex
	elastic.Type = esType

	var ids []idec.ID
	if all {
		ids, err = fc.GetAllMessagesIDS()
		if err != nil {
			panic(err)
		}
	} else {
		ids, err = fc.GetMessagesIDS()
		if err != nil {
			panic(err)
		}
	}

	var newMessages []i2es.ESDoc
	var messages []idec.MSG
	var stash []idec.ID
	j := 0
	for _, id := range ids {
		stash = append(stash, id)
		j++
		if j == 50 {
			m, err := fc.GetRawMessages(stash)
			if err != nil {
				log.Print(err)
			}
			for _, m := range m {
				messages = append(messages, m)
			}
			stash = nil
			j = 0
		}
	}

	for _, m := range messages {
		msg, err := idec.ParseMessage(m.Message)
		if err != nil {
			log.Error(err.Error())
			log.Error(m.ID)
			continue
		}

		var esd i2es.ESDoc
		esd.Echo = msg.Echo
		esd.Subg = msg.Subg
		esd.Author = msg.From
		esd.To = msg.To
		ts := strconv.Itoa(msg.Timestamp)
		esd.Date = ts
		esd.Message = msg.Body
		esd.MsgID = m.ID
		esd.Repto = msg.Repto
		esd.Address = msg.Address
		esd.Misplaced = "no"

		log.Debug("Check message ", m.ID)
		_, err = elastic.CheckID(m.ID)
		if err != nil && !reindex {
			if reindex {
				log.Warn("Reindexing " + m.ID)
			}
			continue
		}

		if !isMessageBlacklisted(esd.MsgID) {
			esd, err = elastic.PutToIndex(esd)
			if err != nil {
				log.Error(err.Error())
				continue
			}
		} else {
			log.Warnf("Skipping blacklisted message %s", esd.MsgID)
			continue
		}

		log.Warn("Message ", m.ID, " added to index and to assignates list")
		newMessages = append(newMessages, esd)
	}

	err = elastic.AssignTopics(newMessages)
	if err != nil {
		log.Error(err.Error())
	}
}

func isMessageBlacklisted(id string) bool {
	if denyMessages == nil {
		return false
	}

	for i := range denyMessages {
		if id == denyMessages[i] {
			return true
		}
	}
	return false
}

func loadBlacklist() []string {
	if _, err := os.Stat(blacklistFile); os.IsNotExist(err) {
		return nil
	}

	file, err := os.Open(blacklistFile)
	if err != nil {
		return nil
	}
	defer file.Close()

	data, err := ioutil.ReadAll(file)
	if err != nil {
		return nil
	}

	return strings.Split(string(data), "\n")
}