// consumer
package main

import (
	"crypto/sha256"
	"encoding/hex"
	"fmt"
	"log"
	"strconv"
	"strings"
	"time"

	"gopkg.in/mgo.v2"
)

type consumed struct {
	user   string
	error  bool
	logins []string
	empty  bool
}

func hash(val []byte) string {

	h := sha256.New()
	h.Write(val)

	return hex.EncodeToString(h.Sum(nil))
}

func consumer() {

	for {

		prod := <-consume

		start := time.Now()

		status = _Consumer

		var bulk = make(map[string][]*mgo.Bulk)
		var allLogins = make(map[string]MongoLogin)

		cons := consumed{
			user:   prod.user,
			logins: make([]string, 0),
			error:  false,
		}

		for i := range prod.logins {
			login := prod.logins[i]
			// se la riga di login e' vuota
			if login == "" {
				log.Println("Login empty: ", prod.user)
				cons.logins = append(cons.logins, login)
				continue
			}
			sval := strings.Split(login, ":")
			// se il formato della riga di login non e' corretto
			if sval[1] == "" {
				log.Println("Login format error: ", login, prod.user)
				cons.logins = append(cons.logins, login)
				continue
			}
			// se il timestamp della riga di login non e' corretto
			date, err := strconv.ParseInt(sval[1], 10, 64)
			if err != nil {
				log.Printf("Date Error: %+v - %s - %s\n", err, prod.user, login)
				cons.logins = append(cons.logins, login)
				continue
			}
			mlID := hash([]byte(fmt.Sprintf("%s%s%s", prod.user, time.Unix(date, 0).Format("20060102T15"), sval[2]))) // Format("20060102T150405")
			ml := MongoLogin{
				// genera l' _ID con user e timestamp
				ID:       mlID,
				User:     prod.user,
				Protocol: sval[0],
				IP:       sval[2],
				Date:     time.Unix(date, 0),
				Insert:   time.Now(),
			}

			allLogins[mlID] = ml

		}

		for _, val := range allLogins {
			dt := fmt.Sprintf("lastlogin_%s", val.Date.Format("0601"))
			if _, ok := bulk[dt]; !ok {
				for j := range dbs.mdb {
					b := dbs.mdb[j].DB("lastlogin").C(dt).Bulk()
					b.Unordered()
					bulk[dt] = append(bulk[dt], b)
				}
			}
			for _, bl := range bulk[dt] {
				bl.Insert(val)
			}
		}

		for _, val := range bulk {
			for j, bl := range val {
				_, err := bl.Run()
				if j == 0 {
					if err != nil {
						if !strings.Contains(err.Error(), "E11000") {
							fmt.Printf("Err: %+v\n", err)
							cons.error = true
							counter <- Counterchan{
								tipo: "err",
								val:  len(prod.logins),
							}
							if opts.Test {
								log.Printf("ERR: %s - %+v\n", prod.user, prod.logins)
							}
							continue
						} else {
							counter <- Counterchan{
								tipo: "dup",
								val:  strings.Count(err.Error(), "E11000"),
							}
						}
					} else {
						if opts.Test {
							log.Printf("OK: %s - %+v\n", prod.user, prod.logins)
						}

					}
				}
			}

			cons.logins = append(cons.logins, prod.logins...)
		}

		counter <- Counterchan{
			tipo: "log",
			val:  len(prod.logins),
		}

		if opts.Debug {
			fmt.Printf("CONS: user=%s logins=%d in %v - active=%d\n", prod.user, len(prod.logins), time.Since(start), dbs.rdb.ActiveCount())
		}

		if opts.Debug && len(prod.logins) > 10 {
			fmt.Printf("LOGS: %+v\n", cons.logins)
		}

		//		wg.Done()
		remove <- cons
	}
}