#
#   __main__.py
#
#   This module is the entrypoint of the `logparse` shell command and also
#   contains single-use functions which don't fit elsewhere.
#

import logging, logging.handlers
import argparse
import os
import glob
import sys
from datetime import datetime

import logparse
from . import config
from logparse import formatting, mail
from .parsers import load_parsers, sudo, sshd, cron, httpd, smbd, postfix, zfs, temperature

def rotate():   
    # rotate logs using systemd logrotate
    if parser.parse_args().function is None:
        if (config.prefs['rotate'] == 'y'):
            subprocess.call("/usr/sbin/logrotate -f /etc/logrotate.conf", shell=True)
            logger.info("rotated logfiles")
        else:
            logger.debug("user doesn't want to rotate logs")
            if (config.prefs['rotate'] == 's'):
                logger.debug("Here is the output of `logrotate -d /etc/logrotate.conf` (simulated):")
                sim = subprocess.check_output("/usr/sbin/logrotate -d /etc/logrotate.conf", shell=True)
                logger.debug(sim)



def main():
    # Get arguments
    parser = argparse.ArgumentParser(description='grab logs of some common services and send them by email')
    parser.add_argument('-t','--to', help='mail recipient (\"to\" address)', required=False)
    parser.add_argument('-c', '--config', help='path to config file', required=False)
    parser.add_argument('-p', '--print', help='print HTML to stdout', required=False, dest='printout', action='store_true', default=False)
    parser.add_argument('-d', '--destination', help='file to output HTML', required=False)
    parser.add_argument('-f', '--overwrite', help='force overwrite an existing output file', required=False, action='store_true', default=False)
    parser.add_argument('-v', '--verbose', help='verbose console/syslog output (for debugging)', required=False, default=False, action='store_true')
    parser.add_argument('-r', '--rotate', help='force rotate log files using systemd logrotate', required=False, default=False, action='store_true')
    parser.add_argument('-nr', '--no-rotate', help='do not rotate logfiles (overrides logparse.conf)', required=False, default=False, action='store_true')
    parser.add_argument('-l', '--logs', help='services to analyse', required=False)

    # Set up logging
    logger = logging.getLogger(__name__)
    loghandler = logging.handlers.SysLogHandler(address = '/dev/log')
    loghandler.setFormatter(logging.Formatter(fmt='logparse.py[' + str(os.getpid()) + ']: %(message)s'))
    loghandler.setLevel(logging.WARNING)   # don't spam syslog with debug messages
    if parser.parse_args().verbose:
        print("Verbose mode is on")
        logging.basicConfig(level=logging.DEBUG)
        logger.debug("Verbose mode turned on")
    else:
        logging.basicConfig(level=logging.INFO)
    logger.addHandler(loghandler)

    # Load config
    if parser.parse_args().config or config.prefs['verbose']:
        config.prefs = config.loadconf(parser.parse_args().config, parser)
    else:
        config.prefs = config.loadconf(argparser=parser)
    logger.debug("Finished loading config")

    # Time analysis
    global start
    start = datetime.now()
    logger.info("Beginning log analysis at {0} {1}".format(start.strftime(formatting.DATEFMT), start.strftime(formatting.TIMEFMT)))
    logger.debug("This is {0} version {1}, running on Python {2}".format(logparse.__name__, logparse.__version__, sys.version))
     
#    for l in parser.parse_args().logs.split(' '):
#        eval(l)
#        sys.exit()

#    print(load_parsers.search());
    # Write HTML document
    global output_html
    output_html = formatting.header(config.prefs['header'])
    output_html += sudo.parse_log()
    output_html += sshd.parse_log()
    output_html += cron.parse_log()
    output_html += httpd.parse_log()
    output_html += smbd.parse_log()
    output_html += postfix.parse_log()
    output_html += zfs.parse_log()
    output_html += temperature.parse_log()
    output_html += formatting.closetag('body') + formatting.closetag('html')
    if parser.parse_args().printout:
        print(output_html)
    if parser.parse_args().destination:
        logger.debug("Outputting to {0}".format(parser.parse_args().destination))
        if not os.path.isfile(parser.parse_args().destination) and not parser.parse_args().overwrite:
            with open(parser.parse_args().destination, 'w') as f:
                f.write(output_html)
                logger.info("Written output to {}".format(parser.parse_args().destination))
        else:
            logger.warning("Destination file already exists")
            if input("Would you like to overwrite {0}? (y/n) [n] ".format(parser.parse_args().destination)) == 'y':
                with open(parser.parse_args().destination, 'w') as f:
                    f.write(output_html)
                logger.debug("Written output to {}".format(parser.parse_args().destination))
            else:
                logger.warning("No output written")

    if parser.parse_args().to:
       mail.sendmail(mailbin=config.prefs['mail']['mailbin'], body=output_html, recipient=parser.parse_args().to, subject="logparse test")
    
    # Print end message
    finish = datetime.now()
    logger.info("Finished parsing logs at {0} {1} (total time: {2})".format(finish.strftime(formatting.DATEFMT), finish.strftime(formatting.TIMEFMT), finish - start))

    return