# -*- coding: utf-8 -*-
'''
Created on Jul 01, 2014

@author: tc
'''


from datetime import datetime
from django.conf import settings
from django.contrib.auth import REDIRECT_FIELD_NAME, login as auth_login
from django.contrib.auth.forms import AuthenticationForm
from django.contrib.sites.models import get_current_site
from django.core.urlresolvers import reverse
from django.db.models import Q
from django.http import HttpResponse, HttpResponseBadRequest
from django.http import HttpResponseRedirect
from django.shortcuts import get_object_or_404, redirect
from django.shortcuts import resolve_url
from django.template.response import TemplateResponse
from django.templatetags.static import static
from django.utils.http import is_safe_url
from django.views.decorators.cache import never_cache
from django.views.decorators.csrf import csrf_exempt, csrf_protect
from django.views.decorators.debug import sensitive_post_parameters
from django.views.generic import TemplateView, View
from hdabo.models import Tag, Datasheet, TaggedSheet, Folder
from hdalab.models.renkan import HdalabRenkan
from hdalab.views.ajax import filter_generic
from renkanmanager.models import Renkan
from renkanmanager.utils import LineNodePlacer, renkan_copier, renkan_deleter
from renkanmanager.views import RenkanGetPut
import json
import uuid



import logging
logger = logging.getLogger(__name__)


class ProfileHome(TemplateView):
    
    template_name = "profile_home.html"
    
    def get_context_data(self, **kwargs):
        context = super(ProfileHome, self).get_context_data(**kwargs)
        context['renkan_list'] = HdalabRenkan.objects.select_related("renkan").filter(renkan__owner=self.request.user).order_by("-renkan__modification_date")
        return context


class RenkanPublicList(TemplateView):
    
    template_name = "renkan_list.html"
    
    def get_context_data(self, **kwargs):
        context = super(RenkanPublicList, self).get_context_data(**kwargs)
        context['renkan_list'] = HdalabRenkan.objects.select_related("renkan").filter(state=HdalabRenkan.PUBLISHED).order_by("-renkan__modification_date")
        return context



class RenkanNew(View):
    
    def get(self, request):
        
        rk = Renkan()
        rk_id = unicode(uuid.uuid1())
        rk.rk_id = rk_id
        rk.owner = request.user
        rk.content = '{}'
        rk.title = "Nouveau Renkan "
        rk.save()
        hr = HdalabRenkan()
        hr.renkan = rk
        from random import randrange
        hr.state = randrange(4) + 1
        hr.save()
        
        return redirect("%s?rk_id=%s" % (reverse('renkan_edit'), rk_id))



class RenkanEdit(TemplateView):
    
    template_name="renkan_edit.html"
    
    def get_context_data(self, **kwargs):
        context = super(RenkanEdit, self).get_context_data(**kwargs)
        # If a renkan id is set
        rk_id = self.request.GET.get("rk_id", "")
        if rk_id!="":
            rk = get_object_or_404(Renkan, rk_id=rk_id)
            if rk.owner!=self.request.user:
                raise Exception("You are not allowed to edit this renkan")
        
        form = AuthenticationForm(self.request)
        context["form"] = form
        
        return context



class HdalabRenkanGetPut(RenkanGetPut):
    
    @csrf_exempt
    def dispatch(self, *args, **kwargs):
        return super(HdalabRenkanGetPut, self).dispatch(*args, **kwargs)
    
    def get(self, request):
        
        # If a renkan id is set
        rk_id = request.GET.get("rk_id", "")
        if rk_id!="":
            rk = get_object_or_404(Renkan, rk_id=rk_id)
            return HttpResponse(rk.content, content_type="application/json")
        
        # Start dict for renkan json
        now = datetime.now().strftime("%Y-%m-%d %H:%M")
        
        content = {
          "id": unicode(uuid.uuid1()),
          "title": "",
          "description": "(empty description)",
          "created": now,
          "updated": now,
          "nodes": [],
          "edges": [],
          "views": [],
          "users": [],
        }
        
        # category image dict
        cat_dict = {u"Créateur": static("hdalab/img/category_creator.png"),
                    u"Datation": static("hdalab/img/category_datation.png"),
                    u"Discipline artistique": static("hdalab/img/category_discipline.png"),
                    u"Localisation": static("hdalab/img/category_localisation.png"),
                    u"Ecole/Mouvement": static("hdalab/img/category_movement.png")}
        
        
        # Renkan Project ID
        project_id = unicode(uuid.uuid1())
        
        
        # If a notice id is set
        notice_id = request.GET.get("notice", "")
        if notice_id!="":
            notice = get_object_or_404(Datasheet, hda_id=notice_id)
            # We get the ORDERED tags if we display one sheet (case valid = 0 and 1)
            ordered_tags = TaggedSheet.objects.filter(datasheet=notice).select_related("tag", "tag__dbpedia_fields", "tag__category").order_by('order')[:15]
            # Prepare Node placer :
            np = LineNodePlacer()
            np.init({"datasheet": (1, 1), "tags": (2, len(ordered_tags))})
            # Place notice :
            content["nodes"].append({
                "id": unicode(uuid.uuid1()),
                "title": notice.title,
                "description": notice.description,
                "uri": notice.url,
                "position": np.get_place("datasheet"),
                "image": static("hdalab/img/page_icon.png"),
                "size": 0,
                "project_id": project_id,
                "color": None,
                #"created_by": "roster_user-84fe909f-ba37-48e6-a25f-9d2f129a95b7"
            })
            
            for ot in ordered_tags:
                t = ot.tag
                img_url = t.dbpedia_fields.thumbnail if hasattr(t, 'dbpedia_fields') and t.dbpedia_fields and t.dbpedia_fields.thumbnail else None
                if img_url is None and t.category is not None:
                    img_url = cat_dict[t.category.label]
                
                content["nodes"].append({
                  "id": unicode(uuid.uuid1()),
                  "title": t.label + ((" (" + t.category.label + ")") if t.category else ""),
                  "description": t.dbpedia_uri,
                  "uri": t.dbpedia_uri,
                  "position": np.get_place("tags"),
                  "image": img_url,
                  "size": 0,
                  "project_id": project_id,
                  "color": None,
                  #"created_by": "roster_user-84fe909f-ba37-48e6-a25f-9d2f129a95b7"
                })
            
            response = json.dumps(content)
            return HttpResponse(response, content_type="application/json")
        
        
        # If a folder id is set
        folder_id = request.GET.get("folder", "")
        if folder_id!="":
            #TODO : optimize to avoid tag request on each notice
            folder = get_object_or_404(Folder.objects.select_related("datasheets", "datasheets__tags"), pk=folder_id)
            notices = folder.datasheets.all()
            n_tags = []
            notice_tag_dict = {}
            tag_uuid_dict = {}
            for n in notices:
                notice_tag_dict[n.pk] = {"uuid":unicode(uuid.uuid1()), "tags":[] }
                for t in n.tags.all()[:5]:
                    if t.pk not in tag_uuid_dict:
                        tag_uuid_dict[t.pk] = unicode(uuid.uuid1())
                    notice_tag_dict[n.pk]["tags"].append(tag_uuid_dict[t.pk])
                    n_tags.append(t)
            n_tags = [t.pk for t in n_tags]
            all_tags = Tag.objects.filter( pk__in=n_tags ).select_related("dbpedia_fields", "category")
            
            # Prepare Node placer :
            np = LineNodePlacer()
            np.init({"datasheet": (1, len(notices)), "tags": (2, len(all_tags))})
            
            # Place notices
            for n in notices:
                content["nodes"].append({
                  "id": notice_tag_dict[n.pk]["uuid"],
                  "title": n.title,
                  "description": n.description,
                  "uri": n.url,
                  "position": np.get_place("datasheet"),
                  "image": static("hdalab/img/page_icon.png"),
                  "size": 0,
                  "project_id": project_id,
                  "color": None,
                  #"created_by": "roster_user-84fe909f-ba37-48e6-a25f-9d2f129a95b7"
                })
            
            # Place tags
            for t in all_tags:
                img_url = t.dbpedia_fields.thumbnail if hasattr(t, 'dbpedia_fields') and t.dbpedia_fields and t.dbpedia_fields.thumbnail else None
                if img_url is None and t.category is not None:
                    img_url = cat_dict[t.category.label]
                content["nodes"].append({
                  "id": tag_uuid_dict[t.pk],
                  "title": t.label + ((" (" + t.category.label + ")") if t.category else ""),
                  "description": t.dbpedia_uri,
                  "uri": t.dbpedia_uri,
                  "position": np.get_place("tags"),
                  "image": img_url,
                  "size": 0,
                  "project_id": project_id,
                  "color": None,
                  #"created_by": "roster_user-84fe909f-ba37-48e6-a25f-9d2f129a95b7"
                })
            
            # Place edges
            for n_pk in notice_tag_dict:
                for tag_id in notice_tag_dict[n_pk]["tags"]:
                    content["edges"].append({
                        "id": unicode(uuid.uuid1()),
                        "title": "",
                        "description": "",
                        "uri": "",
                        "color": None,
                        "from": notice_tag_dict[n_pk]["uuid"],
                        "to": tag_id,
                        "project_id": project_id,
                        #"created_by": "de68xf75y6hs5rgjhgghxbm217xk"
                    })
            
            response = json.dumps(content)
            return HttpResponse(response, content_type="application/json")
            
        
        # Otherwise we build the datas
        # Get tags and countries
        labels = request.GET.get("label", "").split(",")
        countries = request.GET.get("country", "").split(",")
        # Tags arrive with french label, countries with dbpedia uri
        label_list = [t for t in labels if t!=""]
        country_list = [c for c in countries if c!=""]
        all_tags = Tag.objects.filter( Q(label__in=label_list) | Q(dbpedia_uri__in=country_list) ).select_related("dbpedia_fields", "category")
        
        
        # Get datasheets from ajax filter search
        filter_output = filter_generic(request.GET.get('lang',request.LANGUAGE_CODE), None, ",".join(label_list), ",".join(country_list), content_count=10)
        filter_output = json.loads(filter_output)
        #logger.debug("COUCOU")
        #logger.debug(json.dumps(filter_output, indent=2))
        #return HttpResponse(json.dumps(filter_output, indent=2), content_type="application/json")
        
        # Prepare other tags
        related_tags = []
        all_labels = [t.label for t in all_tags]
        title = "Recherche " + ", ".join(all_labels)
        content["title"] = title
        related_tags_dict = {}
        for c in filter_output["contents"]:
            c["id"] = unicode(uuid.uuid1())
            related_tags_dict[c["id"]] = []
            for t in c["tags"]:
                if t["label"] not in all_labels and t["order"]<6:
                    thumbnail_url = ""
                    for tt in filter_output["tags"]:
                        if tt["label"]==t["label"]:
                            thumbnail_url = tt["thumbnail"]
                    related_tags.append({"label": t["label"], "thumbnail":thumbnail_url, "id":t["id"]})
                    all_labels.append(t["label"])
                related_tags_dict[c["id"]].append(t["id"])
        
        
        # If possible, we search a dbpedia_fields thumbnail or category thumbnail for related tags
        r_tags = [t["label"] for t in related_tags if t["thumbnail"] is None or t["thumbnail"]=="" ]
        r_tags = Tag.objects.filter( label__in=r_tags ).select_related("dbpedia_fields", "category")
        r_tags_dict = {}
        for t in r_tags:
            img_url = t.dbpedia_fields.thumbnail if hasattr(t, 'dbpedia_fields') and t.dbpedia_fields and t.dbpedia_fields.thumbnail else None
            if img_url is None and t.category is not None:
                img_url = cat_dict[t.category.label]
            if img_url:
                r_tags_dict[t.label] = img_url
        # Populate related_tags with found image urls
        for t in related_tags:
            if (t["thumbnail"] is None or t["thumbnail"]=="") and (t["label"] in r_tags_dict):
                t["thumbnail"] = r_tags_dict[t["label"]]
        
        
        # Prepare Node placer :
        np = LineNodePlacer()
        np.init({"tags": (1, len(all_tags)), "datasheet": (2, len(filter_output["contents"])), "related": (3, len(related_tags))})
        
        for t in all_tags:
            img_url = t.dbpedia_fields.thumbnail if hasattr(t, 'dbpedia_fields') and t.dbpedia_fields and t.dbpedia_fields.thumbnail else None
            if img_url is None and t.category is not None:
                img_url = cat_dict[t.category.label]
            
            content["nodes"].append({
              "id": unicode(uuid.uuid1()),
              "title": t.label + ((" (" + t.category.label + ")") if t.category else ""),
              "description": t.dbpedia_uri,
              "uri": t.dbpedia_uri,
              "position": np.get_place("tags"),
              "image": img_url,
              "size": 0,
              "project_id": project_id,
              "color": None,
              #"created_by": "roster_user-84fe909f-ba37-48e6-a25f-9d2f129a95b7"
            })
        
        for c in filter_output["contents"]:
            content["nodes"].append({
              "id": c["id"],
              "title": c["title"],
              "description": c["description"],
              "uri": c["url"],
              "position": np.get_place("datasheet"),
              "image": None,
              "size": 0,
              "project_id": project_id,
              "color": "#FF0033",
              #"created_by": "roster_user-84fe909f-ba37-48e6-a25f-9d2f129a95b7"
            })
        
        for t in related_tags:
            content["nodes"].append({
              "id": t["id"],
              "title": t["label"],
              "description": "",
              "uri": "",
              "position": np.get_place("related"),
              "image": t["thumbnail"],
              "size": 0,
              "project_id": project_id,
              "color": "#00FF33",
              #"created_by": "roster_user-84fe909f-ba37-48e6-a25f-9d2f129a95b7"
            })
        
        for c_id in related_tags_dict:
            for tag_id in related_tags_dict[c_id]:
                content["edges"].append({
                    "id": unicode(uuid.uuid1()),
                    "title": "",
                    "description": "",
                    "uri": "",
                    "color": None,
                    "from": c_id,
                    "to": tag_id,
                    "project_id": project_id,
                    #"created_by": "de68xf75y6hs5rgjhgghxbm217xk"
                })
        
        response = json.dumps(content)
        
        return HttpResponse(response, content_type="application/json")
    
    
    def post(self, request):
        
        rk_id = request.GET.get("rk_id", "")
        #data = json.loads(request.body)
        #logger.debug(data["edges"])
        #logger.debug(data["nodes"])
        #logger.debug(request.user.is_authenticated())
        #logger.debug(request.user.is_anonymous())
        if rk_id!="":
            rk = get_object_or_404(Renkan, rk_id=rk_id)
            if rk.owner!=request.user:
                return HttpResponseBadRequest("You are not allowed to edit this renkan")
            rk.content = request.body
            data = json.loads(request.body)
            if "title" in data:
                rk.title = data["title"]
            rk.save()
            return HttpResponse("SAVED")
        else:
            # if rk_id was not a get parameter AND if it is set in json data AND if user is authenticated
            # Then we can save the renkan
            data = json.loads(request.body)
            if "id" in data:
                rk_id = data["id"]
                if rk_id != "" and Renkan.objects.filter(rk_id=rk_id).count()==0 and request.user.is_authenticated():
                    rk = Renkan()
                    rk.rk_id = rk_id
                    rk.title = data["title"] if "title" in data else ""
                    rk.content = data
                    rk.owner = request.user
                    rk.save()
                    hr = HdalabRenkan()
                    hr.renkan = rk
                    hr.state = HdalabRenkan.EDITION
                    hr.save()
                    return HttpResponse("rk_id=" + rk_id)
         
            
        return HttpResponse("NOT SAVED")




class HdalabRenkanCopy(View):
    
    def get(self, request, rk_id):
        rk = renkan_copier(request.user, rk_id)
        hr = HdalabRenkan()
        hr.renkan = rk
        hr.state = HdalabRenkan.EDITION
        hr.save()
        if "next" in request.GET:
            return redirect(request.GET["next"])
        return redirect(reverse('profile_home'))



class HdalabRenkanDelete(View):
    
    def get(self, request, rk_id):
        renkan_deleter(request.user, rk_id)
        if "next" in request.GET:
            return redirect(request.GET["next"])
        return redirect(reverse('profile_home'))



# Function copied from django.contrib.auth.views to simplify ajax login
@sensitive_post_parameters()
@csrf_protect
@never_cache
def ajax_login(request, template_name='ajax_identification/ajax_login.html',
          redirect_field_name=REDIRECT_FIELD_NAME,
          authentication_form=AuthenticationForm,
          current_app=None, extra_context=None):
    """
    Displays the login form and handles the login action.
    """
    redirect_to = request.REQUEST.get(redirect_field_name, '')

    if request.method == "POST":
        form = authentication_form(request, data=request.POST)
        if form.is_valid():

            # Ensure the user-originating redirection url is safe.
            if not is_safe_url(url=redirect_to, host=request.get_host()):
                redirect_to = resolve_url(settings.LOGIN_REDIRECT_URL)

            # Okay, security check complete. Log the user in.
            auth_login(request, form.get_user())

            return HttpResponseRedirect(redirect_to)
    else:
        form = authentication_form(request)

    current_site = get_current_site(request)

    context = {
        'form': form,
        redirect_field_name: redirect_to,
        'site': current_site,
        'site_name': current_site.name,
    }
    if extra_context is not None:
        context.update(extra_context)
    return TemplateResponse(request, template_name, context,
                            current_app=current_app)
    