import psycopg2 as pg2
from config import config
import logging

logger = logging.getLogger()
logger.setLevel(logging.INFO)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
file_handler = logging.FileHandler('/var/log/desktop.log')
file_handler.setFormatter(formatter)
logger.addHandler(file_handler)


db_name = config['db']['db_name']
db_user = config['db']['db_user']
db_password = config['db']['db_password']
db_port = config['db']['db_port']


def setconn(u_id, vm_num, vm_port,vm_host):
    conn = pg2.connect("host = localhost dbname={} user={} password={} port={}".format(db_name,db_user,db_password,db_port))
    conn.autocommit = True
    cur = conn.cursor()
    cur.execute("SELECT entity_id FROM guacamole_entity WHERE name = '{}'".format(u_id))
    row = cur.fetchone()
    if row == None:
        cur.execute("INSERT INTO guacamole_entity (name, type) VALUES ('{}','USER')".format(u_id))
        cur.execute("SELECT entity_id FROM guacamole_entity WHERE name = '{}'".format(u_id))
        row = cur.fetchone()
        en_id = row[0]
        cur.execute("INSERT INTO guacamole_user(entity_id, password_hash, password_date) VALUES ('{}', '\x74657374', now())".format(en_id))
        print("create user : " , u_id)
    else:
        en_id = row[0]
        cur.execute("SELECT password_hash FROM guacamole_user WHERE entity_id = '{}'".format(en_id))
        row = cur.fetchone()
        if row == None:
           cur.execute("INSERT INTO guacamole_user(entity_id, password_hash, password_date) VALUES ('{}', '\x74657374', now())".format(en_id))
        print("user exsit")
    cn = "{}{}".format(u_id,vm_num)
    cur.execute("SELECT connection_id FROM guacamole_connection WHERE connection_name = '{}'".format(cn))
    row = cur.fetchone()
    if row == None:
        #create connection
        cur.execute("INSERT INTO guacamole_connection (connection_name, protocol) VALUES ('{}', 'vnc')".format(cn))
        cur.execute("SELECT MAX(connection_id) FROM guacamole_connection WHERE connection_name = '{}' AND parent_id IS NULL".format(cn))
        temp_cn_id = cur.fetchone()
        cn_id = temp_cn_id[0]
        cur.execute("INSERT INTO guacamole_connection_parameter VALUES ('{}','hostname','{}')".format(cn_id, vm_host))
        cur.execute("INSERT INTO guacamole_connection_parameter VALUES ('{}','port','{}')".format(cn_id,vm_port))
        #connection permission
        cur.execute("INSERT INTO guacamole_connection_permission(entity_id, connection_id, permission) VALUES ('{}', '{}', 'READ')".format(en_id,cn_id))
        #clipboard-encoding
        cur.execute("INSERT INTO guacamole_connection_parameter VALUES ('{}','clipboard-encoding','UTF-8')".format(cn_id))
        print("create connection")
        log = "create connection : " + cn
        logging.info(log)
    else:
        cur.execute("SELECT MAX(connection_id) FROM guacamole_connection WHERE connection_name = '{}' AND parent_id IS NULL".format(cn))
        temp_cn_id = cur.fetchone()
        cn_id = temp_cn_id[0]
        cur.execute("UPDATE guacamole_connection_parameter SET parameter_value='{}' where connection_id='{}' and parameter_name='hostname'".format(vm_host,cn_id))
        cur.execute("UPDATE guacamole_connection_parameter SET parameter_value='{}' where connection_id='{}' and parameter_name='port'".format(vm_port,cn_id))
        #cur.execute("UPDATE guacamole_connection_parameter SET parameter_value='UTF-8' where connection_id='{}' and parameter_name='clipboard-encoding'".format(cn_id))
        print("no connection")
    conn.close()
    return None


def delconn(u_id, vm_num):
    conn2 = pg2.connect("host = localhost dbname={} user={} password={} port={}".format(db_name,db_user,db_password,db_port))
    conn2.autocommit = True
    cur2 = conn2.cursor()
    cur2.execute("SELECT entity_id FROM guacamole_entity WHERE name = '{}'".format(u_id))
    row2 = cur2.fetchone()
    if row2 == None:
        print("no user : " , u_id)
    else:
        cn2 = "{}{}".format(u_id,vm_num)
        cur2.execute("SELECT connection_id FROM guacamole_connection WHERE connection_name = '{}'".format(cn2))
        row2 = cur2.fetchone()
        if row2 != None:
            print("cn_id : ", row2[0])
            #delete connection
            cur2.execute("SELECT connection_id from guacamole_connection_permission where connection_id = '{}'".format(row2[0]))
            row2 = cur2.fetchone()
            if row2 != None:
                print("delete connection : ",row2[0])
                cur2.execute("delete from guacamole_connection_permission where connection_id = '{}'".format(row2[0]))
                log = "delete connection : " + cn2
                logging.info(log)
    conn2.close()