'''
Created on 15.11.2013

@author: Philipp Rauch
@version: 0.1
'''

from threading  import Thread
from Queue      import Queue
#from CANFilter  import CANFilter
from time       import sleep
from config     import readConf
from MySQLdb    import connect

MYSQL   = 0
CSV     = 1
XML     = 2
JSON    = 3

conf = readConf()

class Swich(Thread):

    _isInit = False

    def __init__(self, source = MYSQL):
        Thread.__init__(self)
        self.source = source

    def __del__(self):
        if self.source == MYSQL:
            self.CAN.join()

    def initialisiere(self):
        if self.source == MYSQL:
            _isInit = True

            ### start CAN ###
#            self.CAN = CANFilter()
#            self.CAN.start()
            self.CAN = None

            ### connect to DB ###
            self.connection = connect(host = conf['mySQL_server'],
                                        user = conf['mySQL_user'],
                                        passwd = conf['mySQL_pass'],
                                        db = conf['mySQL_database'])
            self.cursor = self.connection.cursor()

            ### init Queue ###
            self.queue = Queue()
            print '\tSWICH:\t', self.queue
            return self.queue, self.CAN

        elif self.source == CSV:
            pass

        elif self.source == XML:
            pass

        elif self.source == JSON:
            pass

        else:
            return

    def run(self):
        while True:
            sql = 'SELECT * FROM %s ORDER BY timestamp DESC LIMIT 1'
#            item = Swich.queue.get(block = True)
            item = 'EMS-TEST'

#            data = self.cursor.execute(sql % item)
            self.setQueue(item)
            sleep(0.5)

    def setQueue(self, item):
        self.queue.put(item)

    def getItem(self, block = False):
        return self.queue.get(block)