package internal

import (
	"errors"
	"fmt"
)

type User struct {
	Id       int    `json:"-" db:"id"`
	Name     string `json:"name" 	 binding:"required"`
	Username string `json:"username" binding:"required"`
	Password string `json:"password" binding:"required"`
	UserRole string `json:"-" db:"role"`
}

type AuthUser struct {
	Username string `json:"username" binding:"required"`
	Password string `json:"password" binding:"required"`
}

type RefreshTokenRequest struct {
	RefreshToken string `json:"refreshToken" binding:"required"`
}

type UserRole string

const (
	Student UserRole = "student"
	Teacher UserRole = "teacher"
	Admin   UserRole = "admin"
)

func (userrole UserRole) ToString() string {
	return string(userrole)
}

var ErrInvalidRole = errors.New("invalid role")

func FromString(in string) (UserRole, error) {
	switch in {
	case Student.ToString():
		return Student, nil
	case Teacher.ToString():
		return Teacher, nil
	case Admin.ToString():
		return Admin, nil
	}
	return Student, fmt.Errorf("%q is not a valid role: %w", in, ErrInvalidRole)
}