package database

import (
	"database/sql"
)

type User struct {
	Uid           int
	Email         string
	Username      *string
	Password_hash string
	Password_salt string
}

// Gets a user struct from an email, returns nil-nil if the user did not exist.
func MaybeGetUser(email string) (*User, error) {
	var db = GetDb()

	row := db.QueryRow(
		"SELECT Users.uid, Users.email, Users.username, Users.password_hash, Users.password_salt "+
			"FROM Users "+
			"WHERE Users.email = ?;", email)

	var user User
	if err := row.Scan(
		&user.Uid,
		&user.Email,
		&user.Username,
		&user.Password_hash,
		&user.Password_salt); err != nil {

		if err != sql.ErrNoRows {
			return nil, err
		}

		return nil, nil
	}

	return &user, nil
}

// Writes a new user into the database, returns the user's new uid if no error occurred.
func WriteNewUser(email string, password_hash string, password_salt string) (int, error) {
	var db = GetDb()

	var uid int
	row := db.QueryRow("INSERT INTO Users "+
		"(email, password_hash, password_salt) "+
		"VALUES(?, ?, ?) RETURNING Users.uid;", email, password_hash, password_salt)
	if err := row.Scan(&uid); err != nil {
		return 0, err
	}

	return uid, nil
}