import pymysql
from geruecht import Singleton
from geruecht.model.user import User

class DatabaseController(metaclass=Singleton):
    '''
    DatabaesController

    Connect to the Database and execute sql-executions
    '''

    def __init__(self, url='192.168.5.108', user='wu5', password='E1n$tein', database='geruecht'):
        self.url = url
        self.user = user
        self.password = password
        self.database = database
        self.connect()


    def connect(self):
        try:
            self.db = pymysql.connect(self.url, self.user, self.password, self.database, cursorclass=pymysql.cursors.DictCursor)
        except Exception as err:
            raise err

    def getAllUser(self):
        cursor = self.db.cursor()

    def getUser(self, username):
        self.connect()
        retVal = None
        cursor = self.db.cursor()
        cursor.execute("select * from user where cn='{}'".format(username))
        data = cursor.fetchone()
        if data:
            retVal = User(data)
        self.db.close()
        return retVal


    def insertUser(self, data):
        self.connect()
        cursor = self.db.cursor()
        try:
            cursor.execute("insert into user (cn, dn, firstname, lastname, `group`) VALUES ('{}','{}','{}','{}','{}')".format(
                data['cn'], data['dn'], data['givenName'], data['sn'], data['group']))
            self.db.commit()
        except Exception as err:
            self.db.rollback()
            self.db.close()
            raise err
        self.db.close()

    def updateUser(self, data):
        self.connect()
        cursor = self.db.cursor()
        try:
            cursor.execute("update user dn='{}', firstname='{}', lastname='{}', group='{}' where cn='{}'".format(
                data['dn'], data['givenName'], data['sn'], data['group'], data['cn']))
            self.db.commit()
        except Exception as err:
            self.db.rollback()
            self.db.close()
            raise err
        self.db.close()

if __name__ == '__main__':
    db = DatabaseController(user='tim')