package main

import (
	"flag"
	"log"
	"os"

	"git.andreafazzi.eu/andrea/oef/client"
	"git.andreafazzi.eu/andrea/oef/orm"
	"github.com/gocarina/gocsv"
)

type Credential struct {
	ID       uint
	Username string
	Password string
}

func main() {
	username := flag.String("username", "admin", "Username")
	password := flag.String("password", "admin", "Password")
	output := flag.String("output", "credentials.csv", "Output filename")
	cid := flag.Uint("cid", 0, "Export credentials of participants subscribed to the given contest")

	flag.Parse()

	client, err := client.Dial(flag.Arg(0), *username, *password)
	if err != nil {
		panic(err)
	}

	users := make([]*orm.User, 0)
	credentials := make([]*Credential, 0)

	log.Println("Get all users...")

	err = client.ReadAll(&users)
	if err != nil {
		panic(err)
	}

	if *cid != 0 {
		log.Printf("Get participants subscribed to contest ID %v", *cid)
		contest := new(orm.Contest)
		contest.ID = *cid
		_, err := client.Read(contest)
		if err != nil {
			panic(err)
		}
		for _, participant := range contest.Participants {
			for _, user := range users {
				if user.ID == participant.UserID {
					credentials = append(credentials, &Credential{user.ID, user.Username, user.Password})
				}
			}
		}
	} else {
		for _, user := range users {
			if user.Role == "participant" {
				credentials = append(credentials, &Credential{user.ID, user.Username, user.Password})
			}
		}
	}

	f, err := os.Create(*output)
	if err != nil {
		panic(err)
	}
	defer f.Close()

	gocsv.MarshalFile(credentials, f)

}