# -*- coding: utf-8 -*-

import datetime

# This is needed in a global context once
DATE_TODAY = datetime.datetime.now()

class GenericPostfixLogLine():
    raw_line = None
    date = None
    hostname = None
    service_prefix = None
    service_suffix = None
    pid = None
    unparsed_part = None
    
    def __init__(self, line):
        self.raw_line = line.replace('\n', '')
        fields = self.raw_line.split(' ')
        datefield = ' '.join(fields[0:3])
        line_date = datetime.datetime.strptime(datefield, "%b %d %H:%M:%S")
        self.date = line_date.replace(year=DATE_TODAY.year)
        self.hostname = fields[3]
        service = fields[4][:-1]
        if '/' in service:
            service_parts = service.split('/')
            self.service_prefix = service_parts[0]
            service_suffix_parts = service_parts[1].split('[')
            self.service_suffix = service_suffix_parts[0]
            self.pid = service_suffix_parts[1].replace(']', '')
        else:
            # Cannot handle this kind of line. :/
            pass
        self.unparsed_part = " ".join(fields[5:])

    def __repr__(self):
        return str(self.raw_line)

class SmtpPostfixLogLine():
    def __init__(self, generic_line):
        self.generic_line = generic_line

def parse_line(line):
    generic = GenericPostfixLogLine(line)
    if generic.service_suffix == None:
        return generic
    elif generic.service_suffix == 'smtp':
        return SmtpPostfixLogLine(generic)

if __name__ == '__main__':
    filename = '/home/jpt/Testdata/postfix-log.txt'
    file = open(filename, 'r')
    lines = file.readlines()
    res = parse_line(lines[0])
    print(res)

    import pdb; pdb.set_trace()