'''
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 MySQLdb    import connect

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

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()

            ### connect to DB ###
#            self.connection = MySQLdb.connect("url", "user", "password", "database_name")
#            self.cursor = self.connection.cursor()

            ### init Queue ###
            self.queue = Queue()
            print 'SWICH:\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)