package services

import (
	"GoMembership/internal/models"
	"GoMembership/internal/repositories"
	// "GoMembership/pkg/errors"
	"crypto/rand"
	"encoding/base64"
	"golang.org/x/crypto/bcrypt"
	"time"
)

type UserService interface {
	RegisterUser(user *models.User) (int64, error)
	// AuthenticateUser(email, password string) (*models.User, error)
}

type userService struct {
	repo repositories.UserRepository
}

func NewUserService(repo repositories.UserRepository) UserService {
	return &userService{repo}
}

func (service *userService) RegisterUser(user *models.User) (int64, error) {
	salt := make([]byte, 16)
	if _, err := rand.Read(salt); err != nil {
		return -1, err
	}
	user.Salt = base64.StdEncoding.EncodeToString(salt)

	hashedPassword, err := HashPassword(user.Password, user.Salt)
	if err != nil {
		return -1, err
	}
	user.Password = string(hashedPassword)
	user.CreatedAt = time.Now()
	user.UpdatedAt = time.Now()
	user.MandateDateSigned = time.Now()
	return service.repo.CreateUser(user)
}

func HashPassword(password string, salt string) (string, error) {
	saltedPassword := password + salt
	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(saltedPassword), bcrypt.DefaultCost)
	if err != nil {
		return "", err
	}
	return base64.StdEncoding.EncodeToString(hashedPassword), nil
}

/* func (s *userService) AuthenticateUser(email, password string) (*models.User, error) {
	user, err := s.repo.FindUserByEmail(email)
	if err != nil {
		return nil, errors.ErrUserNotFound
	}

	if !verifyPassword(password, user.Password, user.Salt) {
		return nil, errors.ErrInvalidCredentials
	}

	return user, nil
}
*/
/* func verifyPassword(password string, storedPassword string, salt string) bool {

	saltedPassword := password + salt
	decodedStoredPassword, err := base64.StdEncoding.DecodeString(storedPassword)
	if err != nil {
		return false
	}
	err = bcrypt.CompareHashAndPassword([]byte(decodedStoredPassword), []byte(saltedPassword))
	return err == nil
} */