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', [])
        if not self.ph_regexps: return False
        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', [])
        if not self.hp_regexps: return False
        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']:
                if not self.iwla.isValidForCurrentAnalysis(request) or\
                        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