package device

import (
	"fmt"

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

func CreateDevice(device *Device, userId string) (err error) {
	sqlStmt := fmt.Sprintf(`INSERT INTO device
		(id, name, accessToken, userId)
		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(device.Id, device.Name, device.AccessToken, userId)
	if err != nil {
		tx.Rollback()
		return
	}
	tx.Commit()
	return
}

func ReadDevice(id string) (foundDevice *Device, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, name, accessToken
		FROM device
		WHERE id = '%s'`, id)

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

	defer rows.Close()

	if rows.Next() {
		foundDevice = &Device{}
		err = rows.Scan(&foundDevice.Id, &foundDevice.Name, &foundDevice.AccessToken)
		if err != nil {
			return
		}
		foundDevice.Keys, err = ReadKeysForDevice(foundDevice.Id)
	}

	return
}

func ReadDeviceFromAccessToken(accessToken string) (foundDevice *Device, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, name, accessToken
		FROM device
		WHERE accessToken = '%s'`, accessToken)

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

	defer rows.Close()

	if rows.Next() {
		foundDevice = &Device{}
		err = rows.Scan(&foundDevice.Id, &foundDevice.Name, &foundDevice.AccessToken)
		if err != nil {
			return
		}
		foundDevice.Keys, err = ReadKeysForDevice(foundDevice.Id)
	}

	return
}

func ReadDevicesForUser(userId string) (devices map[string]*Device, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, name, accessToken 
		FROM device
		WHERE userId = '%s'`, userId)

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

	defer rows.Close()

	devices = make(map[string]*Device)

	for rows.Next() {
		foundDevice := &Device{}
		err = rows.Scan(&foundDevice.Id, &foundDevice.Name, &foundDevice.AccessToken)
		if err != nil {
			return
		}
		foundDevice.Keys, err = ReadKeysForDevice(foundDevice.Id)
		devices[foundDevice.Id] = foundDevice
	}

	return
}

func UpdateDevice(device *Device) (err error) {
	sqlStmt := fmt.Sprintf(`UPDATE device SET
			name = ?,
			accessToken = ?
		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(device.Name, device.AccessToken, device.Id)
	if err != nil {
		tx.Rollback()
		return
	}

	tx.Commit()
	return
}

func DeleteDevice(id string) (err error) {
	queryStmt := fmt.Sprintf(`DELETE FROM device 
		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
}