# -*- coding: utf-8 -*-

""" MySQL client """

import logging
import sys

import MySQLdb

log = logging.getLogger(__name__)


class MyDB:
    """ MySQL client """

    host = ""
    user = ""
    pwd = ""
    db = ""

    con = 0

    def __init__(self, host, user, pwd, db):
        self.host = host
        self.user = user
        self.pwd = pwd
        self.db = db

    def connect(self):
        """ Connect to MySQL server """
        if self.con == 0:
            try:
                con = MySQLdb.connect(self.host, self.user, self.pwd, self.db)
                self.con = con
            except Exception:
                log.fatal('Error connecting to MySQL server', exc_info=True)
                sys.exit(1)

    def doSQL(self, sql):
        """ Run INSERT/UPDATE/DELETE/... SQL query """
        cursor = self.con.cursor()
        try:
            cursor.execute(sql)
            self.con.commit()
            return True
        except Exception:
            log.error('Error during SQL request "%s"', sql, exc_info=True)
            self.con.rollback()
        return False

    def doSelect(self, sql):
        """ Run SELECT SQL query and return result as dict """
        cursor = self.con.cursor()
        try:
            cursor.execute(sql)
            return cursor.fetchall()
        except Exception:
            log.error('Error during SQL request "%s"', sql, exc_info=True)
        return False