'''
Created on 15.11.2013

@author: Philipp Rauch
@version: 0.1
'''
from threading import Thread
from Queue import Queue
from time import sleep
from Config.parser import config

#import Module
import database
import modbus

#set source modules
MYSQL   = database
MODBUS  = modbus

### LOAD CONFIG ###
c = config()
conf = c.readConf()

'''
TODO: comment :)
'''

class Switch(Thread):

    def __init__(self, source = MYSQL):
        Thread.__init__(self)
        self.source = source
        self.query = None
        self.queue = None

    def initialisiere(self, query = None, queue = None):
        '''
        initialize the swich with the given source and creates a sql_queue and a sql_query
        it calls the setup method from the submodule of the source

        @return: sql_queue and sql_query
        '''
        try:
            self.cursor = self.source.setup(conf)
        except:
            raise NotImplementedError

        ### init Query ###
        self.query = Queue() if query is None else query
        if conf['config_debug']:
            print '\tSWITCH-QUERY:\t', self.query

        ### init Queue ###
        self.queue = Queue() if queue is None else queue
        if conf['config_debug']:
            print '\tSWITCH-QUEUE:\t', self.queue


    def run(self):
        '''
        The loop method from the submodule is called with a parameter from the sql_query.
        Its output is written to the queue.
        '''
        while True:
            # Queue implementaion
            # Queue contains the tablename for sql_query
            # item = sql_query.get() #block = True
            # sql_query should be included in the result

            item = self.query.get(block = True)

            result = self.source.loop(self.cursor, item)

            #print 'PUT:\t%s' % result

            self.queue.put(result)
            self.query.task_done()
            if self.source == MYSQL:
                sleep(float(conf['mySQL_speed']))
            elif self.source == MODBUS:
                sleep(0.1)