from django.conf import settings

from ldt.ldt_utils import ANALYZER, STORE

import base64

import django.core.urlresolvers

import lucene

import lxml.etree

import urllib

import uuid

__BOOLEAN_DICT = {

    'false':False,

    'true':True,

    '0':False,

    '1':True,

    't': True,

    'f':False

}

def boolean_convert(bool):

    if bool is None:

        return False

    if bool is True or bool is False:

        return bool

    key = str(bool).lower()

    return __BOOLEAN_DICT.get(key, False)

def generate_uuid():

    return unicode(uuid.uuid1())

def normalize_tags(list):

    nlist=[]

    for tag in list:

        tag = tag.lower()

        nlist.append(tag)

    taglist = dict().fromkeys(nlist).keys()    

    return taglist

class LdtSearch(object):

    def query(self, field, query):

        indexSearcher = lucene.IndexSearcher(STORE)

        queryParser = lucene.QueryParser(lucene.Version.LUCENE_30, field, lucene.FrenchAnalyzer(lucene.Version.LUCENE_30))

        queryParser.setDefaultOperator(lucene.QueryParser.Operator.AND)

        queryObj = queryParser.parse(query)

        hits = indexSearcher.search(queryObj, settings.LDT_MAX_SEARCH_NUMBER)

        res = []

        for hit in hits.scoreDocs:

            doc = indexSearcher.doc(hit.doc)

            res.append({"external_id":doc.get("external_id"),"title":doc.get("title")})

        indexSearcher.close()

        return res

    def queryAll(self, query):        

        return self.query("all", query)