# Copyright 2010-2011 Florent Le Coz <louiz@louiz.org>
#
# This file is part of Poezio.
#
# Poezio is free software: you can redistribute it and/or modify
# it under the terms of the zlib license. See the COPYING file.

import sys
from os import environ, makedirs
import os
from datetime import datetime
from config import config
from xhtml import clean_text

import logging

log = logging.getLogger(__name__)

DATA_HOME = config.get('log_dir', '') or os.path.join(environ.get('XDG_DATA_HOME') or os.path.join(environ.get('HOME'), '.local', 'share'), 'poezio')

class Logger(object):
    """
    Appends things to files. Error/information/warning logs
    and also log the conversations to logfiles
    """
    def __init__(self):
        self.logfile = config.get('logfile', 'logs')
        self.roster_logfile = None
        # a dict of 'groupchatname': file-object (opened)
        self.fds = dict()

    def __del__(self):
        for opened_file in self.fds.values():
            opened_file.close()

    def check_and_create_log_dir(self, room):
        """
        Check that the directory where we want to log the messages
        exists. if not, create it
        """
        if config.get('use_log', 'false') == 'false':
            return None
        directory = os.path.join(DATA_HOME, 'logs')
        try:
            makedirs(directory)
        except OSError:
            pass
        try:
            fd = open(os.path.join(directory, room), 'a')
            self.fds[room] = fd
            return fd
        except IOError:
            return None

    def log_message(self, jid, nick, msg):
        """
        log the message in the appropriate jid's file
        """
        if jid in self.fds.keys():
            fd = self.fds[jid]
        else:
            fd = self.check_and_create_log_dir(jid)
        if not fd:
            return
        try:
            msg = clean_text(msg)
            if nick:
                fd.write(datetime.now().strftime('%d-%m-%y [%H:%M:%S] ')+nick+': '+msg+'\n')
            else:
                fd.write(datetime.now().strftime('%d-%m-%y [%H:%M:%S] ')+'* '+msg+'\n')
        except IOError:
            pass
        else:
            fd.flush()          # TODO do something better here?

    def log_roster_change(self, jid, message):
        if not self.roster_logfile:
            try:
                self.roster_logfile = open(os.path.join(DATA_HOME, 'logs', 'roster.log'), 'a')
            except IOError:
                return
        self.roster_logfile.write('%s %s %s\n' % (datetime.now().strftime('%d-%m-%y [%H:%M:%S]'), jid, message))
        self.roster_logfile.flush()

logger = Logger()