#
#   postfix.py
#   
#   Get message statistics from postfix/sendmail logs
#

import re

from ..formatting import *
from ..util import readlog, resolve
from .. import config

import logging
logger = logging.getLogger(__name__)

def parse_log():
    output = ''
    logger.debug("Starting postfix section")
    output += opentag('div', 1, 'postfix', 'section')
    output += writetitle("postfix")
    logger.debug("Searching through postfix logs")
    messages = re.findall('.*from\=<(.*)>, size\=(\d*),.*\n.*to=<(.*)>', readlog(config.prefs['logs']['postfix']))
    r = []
    s = []
    size = 0
    logger.debug("Analysing message size")
    for message in messages:
        r.append(message[2])
        s.append(message[0])
        size += int(message[1])
    # size = sum([int(x) for x in messages])
    size = parsesize(size)
    n = str(len(messages))

    logger.debug("Analysing message recipients")
    if (len(r) > 0):
        s = list(set(r))    # unique recipients
        if (len(s) > 1):
            r = orderbyfreq(r)
            r = truncl(r, config.prefs['maxlist'])
            output += writedata(n + " messages sent to", r)
        else:
            output += writedata(n + " messages sent to " + r[0])
    else:
        output += writedata(n + " messages sent")
    logger.info("Found {0} messages sent to {1} recipients".format(n, str(len(r))))
    output += writedata("total of " + size)
    output += closetag('div', 1)
    logger.info("Finished postfix section")
    return output