# -*- 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

"""
Pre analysis hook
Change page into hit and hit into page into statistics

Plugin requirements :
    None

Conf values needed :
    page_to_hit_conf*
    hit_to_page_conf*

Output files :
    None

Statistics creation :
    None

Statistics update :
visits :
   remote_addr =>
       is_page

Statistics deletion :
    None
"""

class IWLAPreAnalysisPageToHit(IPlugin):

    def __init__(self, iwla):
        super(IWLAPreAnalysisPageToHit, self).__init__(iwla)
        self.API_VERSION = 1

    def load(self):
        # Page to hit
        self.ph_regexps = self.iwla.getConfValue('page_to_hit_conf', [])
        self.ph_regexps = map(lambda(r): re.compile(r), self.ph_regexps)

        # Hit to page
        self.hp_regexps = self.iwla.getConfValue('hit_to_page_conf', [])
        self.hp_regexps = map(lambda(r): re.compile(r), self.hp_regexps)

        return True

    def hook(self):
        hits = self.iwla.getCurrentVisists()

        for (k, super_hit) in hits.items():
            if super_hit['robot']: continue

            for request in super_hit['requests'][::-1]:
                if not self.iwla.isValidForCurrentAnalysis(request):
                    break

                if not self.iwla.hasBeenViewed(request):
                    continue

                uri = request['extract_request']['extract_uri']

                if request['is_page']:
                    # Page to hit
                    for regexp in self.ph_regexps:
                        if regexp.match(uri):
                            #print '%s is a hit' % (uri )
                            request['is_page'] = False
                            super_hit['viewed_pages'] -= 1
                            super_hit['viewed_hits'] += 1
                            break
                else:
                    # Hit to page
                    for regexp in self.hp_regexps:
                        if regexp.match(uri):
                            #print '%s is a page' % (uri )
                            request['is_page'] = True
                            super_hit['viewed_pages'] += 1
                            super_hit['viewed_hits'] -= 1
                            break