# Create your views here.
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render_to_response, get_object_or_404
from django.core.urlresolvers import reverse
from django.template import RequestContext, TemplateDoesNotExist
from django.template.loader import get_template
from django.core import serializers
from django.core.serializers.json import DjangoJSONEncoder
from django.utils import simplejson
from django.conf import settings

from blinkster.ldt.models import Segment
from blinkster.ldt.utils import LdtSearch
from blinkster.models import Roi, Poi
import blinkster
import re
import urllib2

def serialize_queryset_to_json(response, obj_list, extra=None):
    objs = {
        "version" : blinkster.VERSION,
        "list" : obj_list,
    }
    if extra:
        objs = dict(objs, **extra)

    simplejson.dump(objs, response, cls=DjangoJSONEncoder,ensure_ascii=False, indent=4)
    return response

def roi_list(request):

    content_type = request.GET.get("content-type")
    content_type_req = ""
    if content_type is None:
        content_type = u"application/json; charset=utf-8"
    else:
        content_type_req = "?content-type=" + urllib2.quote(content_type)
    

    response = HttpResponse(content_type=str(content_type))
    results = []
    for roi_dict in [roi.serialize_to_dict() for roi in Roi.objects.all()]:
        roi_dict["poi_list_url"] = unicode(settings.WEB_URL.rstrip('/') + reverse('blinkster.views.poi_list',args=[roi_dict["sid"]])+content_type_req)
        results.append(roi_dict)

    return serialize_queryset_to_json(response, results)

def poi_list(request, roi_sid):
    content_type = request.GET.get("content-type")
    content_type_req = ""
    if content_type is None:
        content_type = u"application/json; charset=utf-8"
    else:
        content_type_req = "?content-type=" + urllib2.quote(content_type)

    response = HttpResponse(content_type=str(content_type))
    roi = get_object_or_404(Roi, sid=roi_sid)
    results = []
    for poi_dict in [poi.serialize_to_dict() for poi in Poi.objects.filter(roi=roi)]:
        poi_dict["segment_search_url"] = unicode(settings.WEB_URL.rstrip('/') + reverse('blinkster.views.segment_search_get',args=[u"tags",u"or",urllib2.quote(poi_dict["tags"].encode("utf-8"))]) + content_type_req)
        results.append(poi_dict)
    return serialize_queryset_to_json(response, results)

# Display segment detail.
# This will have to be moved to ldt module
def segment_detail(request, iri_id, ensemble_id, cutting_id, element_id, project_id = None):
    
    segment = get_object_or_404(Segment, project_id=project_id, iri_id=iri_id, ensemble_id=ensemble_id, cutting_id=cutting_id, element_id=element_id)
    return render_to_response("segment_detail.html",{'segment':segment}, context_instance=RequestContext(request))

def segment_search_post(request):
    query = request.POST["query"]
    field = request.POST["field"]
    operator = request.POST["operator"]
    return segment_search_get(request, query, field, operator)

def segment_search_get(request, query, field = u"tags", operator=u"or"):
    
    content_type = request.GET.get("content-type")
    content_type_req = ""
    if content_type is None:
        content_type = u"application/json; charset=utf-8"
    else:
        content_type_req = "?content-type=" + urllib2.quote(content_type)

    response = HttpResponse(content_type=str(content_type))

    # transform tag1, tag2, tag3 in "tag1" OR "tag2" OR "tag3"
    query_str = (u" " + operator.upper() + u" ").join(["\"" + t.strip() + "\"" for t in re.split("\,|\;",query)])
    

    searcher = blinkster.ldt.utils.LdtSearch()
    index_results = searcher.query(field, query_str)

    results = []

    for index_res in index_results:
        res = dict(index_res)
        segs = Segment.objects.filter(iri_id=index_res["iri_id"], element_id=index_res["element_id"], cutting_id=index_res["decoupage_id"], ensemble_id=index_res["ensemble_id"]).values() 
        for seg in segs:
            del seg["project_obj_id"]
            del seg["content_id"]
            del seg["id"]
            res = dict(res, **seg)
        res["segment_detail_url"] = unicode(settings.WEB_URL.rstrip('/') + reverse('blinkster.views.segment_detail',args=[res["iri_id"], res["ensemble_id"], res["cutting_id"], res["element_id"]]) + content_type_req)
        results.append(res)
    
    return serialize_queryset_to_json(response, results, {u"query" : query, u"field": field, u"operator":operator, u"final_query": query_str})
