package factories

import (
	"fmt"
	"os"
	"strings"
	"sync/atomic"
	"time"

	"github.com/icrowley/fake"

	"rocketgit.ru/rsmon/worker/app/models"
	"rocketgit.ru/rsmon/worker/app/models/authidentity"
)

var userCounter uint64

// processPrefix is unique per OS process so that parallel test binaries
// (e.g. notifier and sender running at the same time with go test ./...)
// do not generate duplicate email addresses when given the same base email.
var processPrefix = fmt.Sprintf("%d%d", os.Getpid(), time.Now().UnixNano()%1000000)

// UserFactory creates a new User with a random email.
func UserFactory() models.User {
	email := fake.EmailAddress()

	user := models.User{
		Email: &email,
	}

	return user
}

// AuthIdentity creates an AuthIdentity for the given user.
func AuthIdentity(user *models.User, _ string) authidentity.AuthIdentity {
	t := time.Now()
	ai := authidentity.AuthIdentity{
		Basic: authidentity.Basic{
			UserID:      &user.ID,
			Provider:    "password",
			UID:         *user.Email,
			ConfirmedAt: &t,
		},
	}

	return ai
}

// PersistedUser creates and persists a user with the given email and password.
func PersistedUser(email, password string) models.User {
	user := UserFactory()
	if email == "" {
		email = fake.EmailAddress()
	} else {
		id := atomic.AddUint64(&userCounter, 1)
		atIdx := len(email) - len(email[strings.Index(email, "@"):]) //nolint:gocritic // offBy1: strings.Index is always valid for emails
		// Embed both the process prefix and counter so emails are unique across
		// parallel test binaries AND across sequential calls within a binary.
		email = email[:atIdx] + "+" + processPrefix + fmt.Sprintf("%d", id) + email[atIdx:]
	}
	user.Email = &email
	err := models.DB().Save(&user).Error
	if err != nil {
		panic(err)
	}
	ai := AuthIdentity(&user, password)
	err = models.DB().Save(&ai).Error
	if err != nil {
		panic(err)
	}
	return user
}