# -*- coding: utf-8 -*-
#
# Copyright Grégory Soutadé 2015

# This file is part of iwla

# iwla is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# iwla is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with iwla.  If not, see <http://www.gnu.org/licenses/>.
#

import re

from iwla import IWLA
from iplugin import IPlugin

import awstats_data

"""
Post analysis hook

Detect browser information from requests

Plugin requirements :
    None

Conf values needed :
    None

Output files :
    None

Statistics creation :
visits :
   remote_addr =>
       browser

month_stats :
    browsers =>
        browser => count

Statistics update :
    None

Statistics deletion :
    None
"""

class IWLAPostAnalysisBrowsers(IPlugin):
    def __init__(self, iwla):
        super(IWLAPostAnalysisBrowsers, self).__init__(iwla)
        self.API_VERSION = 1

    def load(self):
        self.browsers = []

        for hashid in awstats_data.browsers:
            hashid_re = re.compile(r'.*%s.*' % (hashid), re.IGNORECASE)

            if hashid in awstats_data.browsers_hashid.keys():
                self.browsers.append((hashid_re, awstats_data.browsers_hashid[hashid]))

        return True

    def hook(self):
        stats = self.iwla.getValidVisitors()
        month_stats = self.iwla.getMonthStats()
        
        browsers = month_stats.get('browsers', {})

        browsers_stats = {}

        for (k, super_hit) in stats.items():
            if not 'browser' in super_hit:
                for r in super_hit['requests'][::-1]:
                    user_agent = r['http_user_agent']
                    if not user_agent: continue
                
                    browser_name = 'unknown'
                    for (hashid_re, browser) in self.browsers:
                        if hashid_re.match(user_agent):
                            browser_name = browser
                            break
                    super_hit['browser'] = browser_name
                    break
            else:
                browser_name = super_hit['browser']

            if not browser_name in browsers_stats.keys():
                browsers_stats[browser_name] = 1
            else:
                browsers_stats[browser_name] += 1

        month_stats['browsers'] = browsers_stats