package auth

import "fmt"

var ErrInvalidSession = fmt.Errorf(`invalid session token`)

type User struct {
	Username string `json:"username"`
	Name     string `json:"name"`
	Surname  string `json:"surname"`
	FullName string `json:"fullName"`
	Email    string `json:"email"`
}

func (u User) WithDefaultFullName() User {
	return User{
		Username: u.Username,
		Name:     u.Name,
		Surname:  u.Surname,
		Email:    u.Email,

		FullName: u.Username + " " + u.Surname,
	}
}

type Session struct {
	Username string `json:"username"`
	Token    string `json:"token"`
}

type AuthenticatorService interface {
	GetUser(username string) (*User, error)
	GetUsers() ([]*User, error)
	GetSession(token string) (*Session, error)
	Login(username, password string) (*Session, error)
}

func UserForSession(as AuthenticatorService, token string) (*User, error) {
	session, err := as.GetSession(token)
	if err != nil {
		return nil, err
	}

	user, err := as.GetUser(session.Username)
	if err != nil {
		return nil, err
	}

	return user, nil
}

func New(host string) AuthenticatorService {
	if host == ":memory:" {
		return exampleMemoryUsers
	}

	return &LDAPAuthService{host}
}