package user

import (
	"fmt"

	"git.nutfactory.org/hoernschen/Matrix/entities/device"
	"git.nutfactory.org/hoernschen/Matrix/utils/database"
)

func CreateUser(user *User) (err error) {
	sqlStmt := fmt.Sprintf(`INSERT INTO user
		(id, name, password)
		VALUES
		(?, ?, ?)`)

	tx, err := database.DB.Begin()
	if err != nil {
		return
	}

	stmt, err := tx.Prepare(sqlStmt)
	if err != nil {
		return
	}
	defer stmt.Close()

	_, err = stmt.Exec(user.Id, user.Name, user.Password)
	if err != nil {
		tx.Rollback()
		return
	}
	tx.Commit()
	return
}

func ReadUser(id string) (foundUser *User, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, name, password
		FROM user
		WHERE id = '%s'`, id)

	rows, err := database.DB.Query(queryStmt)
	if err != nil {
		return
	}

	defer rows.Close()

	if rows.Next() {
		foundUser = &User{}
		err = rows.Scan(&foundUser.Id, &foundUser.Name, &foundUser.Password)
		if err != nil {
			return
		}
		foundUser.Devices, err = device.ReadDevicesForUser(foundUser.Id)
	}

	return
}

func ReadUserFromAccessToken(accessToken string) (foundUser *User, err error) {
	queryStmt := fmt.Sprintf(`SELECT u.id, u.name, u.password
		FROM user as u
		join device as d on u.id = d.userId
		WHERE d.accessToken = '%s'`, accessToken)

	rows, err := database.DB.Query(queryStmt)
	if err != nil {
		return
	}

	defer rows.Close()

	if rows.Next() {
		foundUser = &User{}
		err = rows.Scan(&foundUser.Id, &foundUser.Name, &foundUser.Password)
		if err != nil {
			return
		}
		foundUser.Devices, err = device.ReadDevicesForUser(foundUser.Id)
	}

	return
}

func UpdateUser(user *User) (err error) {
	sqlStmt := fmt.Sprintf(`UPDATE user SET
			name = ?,
			password = ?
		WHERE id = ?`)

	tx, err := database.DB.Begin()
	if err != nil {
		return
	}

	stmt, err := tx.Prepare(sqlStmt)
	if err != nil {
		return
	}
	defer stmt.Close()

	_, err = stmt.Exec(user.Name, user.Password, user.Id)
	if err != nil {
		tx.Rollback()
		return
	}

	tx.Commit()
	return
}

func DeleteUser(id string) (err error) {
	queryStmt := fmt.Sprintf(`DELETE FROM user 
		WHERE id = '%s'`, id)

	tx, err := database.DB.Begin()
	if err != nil {
		return
	}

	_, err = tx.Exec(queryStmt)
	if err != nil {
		tx.Rollback()
		return
	}

	tx.Commit()
	return
}