'''
Melissa asked to be e-mailed the total yardage of our un-shipped, un-invoiced finish goods inventory.

@author: Wes
'''
from alert import send_alert_html

import time, logging, sys, os, StringIO, csv
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

RECIPIENTS = ['admin@example.com', 'user1@example.com']
SUBJECT = 'FGI Report'
MESSAGE = None

TEST_MODE = False
logger = None
LOG_LEVEL = logging.DEBUG

SUM_QUERY = 'select SUM(RTPLG) [total_yards_produced] from TXRYRT00 WHERE (RTSLG = 0.0 AND RTILG = 0.0)'
DETAIL_QUERY = 'select RTALN [order_num], RTRNR [roll_num], RTANR [item_num], xartbz [item_desc], RTLOC [warehouse], RTLPL [bin], RTPLG [yards_produced], RTSLG [yards_shipped], RTILG [yards_invoiced] from TXRYRT00 LEFT JOIN txmyat03 ON RTANR = XANR where (RTSLG = 0.0 AND RTILG = 0.0) ORDER BY RTALN, RTRNR'

engine = create_engine("mssql+pyodbc://jsisbprod", echo=False)
Base = declarative_base(engine)
metadata = Base.metadata

def initializeLogger(name='log'):
    global logger
    global MESSAGE
    #logger = logging.getLogger(__name__)
    logger = logging.getLogger(name)
    if len(logger.handlers) > 0:
        return logger
    logger.setLevel(LOG_LEVEL)
    handler = logging.FileHandler('D:\\FTP\\logs\\' + name + '.log')
    handler.setLevel(LOG_LEVEL)
    formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
    handler.setFormatter(formatter)
    logger.addHandler(handler)
    
    #Also send logs > DEBUG to stdout
    ch = logging.StreamHandler(sys.stdout)
    ch.setLevel(logging.DEBUG)
    formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
    ch.setFormatter(formatter)
    logger.addHandler(ch)

    #Capture log messages in a string for e-mail alert
    MESSAGE = StringIO.StringIO()
    sh = logging.StreamHandler(MESSAGE)
    sh.setLevel(logging.INFO)
    sh.setFormatter(formatter)
    logger.addHandler(sh)

def loadSession():
    global engine
    Session = sessionmaker(bind=engine)
    session = Session()
    return session

def run_FGI_report():
    os.chdir('D:\FTP')
    initializeLogger('FGI_Report')
    logger.debug('Opening connection with DB...')
    session = loadSession()

    logger.debug('Running SUM query...')
    for row in session.execute(SUM_QUERY):
        logger.info('Total Finished Goods Inventory: %s yards', "{0:.3f}".format(row.total_yards_produced))

    #Open file for writing
    logger.debug('Creating Aaron\'s csv file...')
    fname = time.strftime("FGI_%Y%m%d.csv")
    logger.debug('Creating %s. Using \'excel\' dialect for csv writer.', fname)
    f = open(fname, 'wb')
    writer = csv.writer(f, dialect='excel')
    writer.writerow(['order_num', 'roll_num', 'item_num', 'item_desc', 'warehouse', 'bin', 'yards_produced', 'yards_shipped', 'yards_invoiced'])
        
    logger.debug('Running detail query...')
    for row in session.execute(DETAIL_QUERY):
        writer.writerow(row)

    f.close()    

    try:
        logger.debug('Sending e-mail...')
        send_alert_html(RECIPIENTS, SUBJECT, attachments=[fname], message=MESSAGE.getvalue())
    except:
        logger.error('Unable to send e-mail. Is the internet out?')

    logger.debug('Deleting %s', fname)
    os.remove(fname)

if __name__ == '__main__':
    run_FGI_report()