package device

import (
	"fmt"

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

func CreateKey(key *Key, deviceId string) (err error) {
	sqlStmt := fmt.Sprintf(`INSERT INTO key
		(id, type, key, deviceId)
		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(key.Id, key.Type, key.Key, deviceId)
	if err != nil {
		tx.Rollback()
		return
	}
	tx.Commit()
	return
}

func ReadKey(id string) (foundKey *Key, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, type, key 
		FROM key
		WHERE id = '%s'`, id)

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

	defer rows.Close()

	if rows.Next() {
		foundKey = &Key{}
		err = rows.Scan(&foundKey.Id, &foundKey.Type, &foundKey.Key)
		if err != nil {
			return
		}
	}

	return
}

func ReadKeysForDevice(deviceId string) (keys map[string]*Key, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, type, key
		FROM key
		WHERE deviceId = '%s'`, deviceId)

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

	defer rows.Close()

	keys = make(map[string]*Key)

	for rows.Next() {
		foundKey := &Key{}
		err = rows.Scan(&foundKey.Id, &foundKey.Type, &foundKey.Key)
		if err != nil {
			return
		}
		keys[foundKey.Id] = foundKey
	}

	return
}

func UpdateKey(key *Key) (err error) {
	sqlStmt := fmt.Sprintf(`UPDATE key SET
			type = ?,
			key = ?
		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(key.Type, key.Key, key.Id)
	if err != nil {
		tx.Rollback()
		return
	}

	tx.Commit()
	return
}

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