import csv

from django.core import serializers
from django.core.urlresolvers import reverse, reverse_lazy
from django.http import HttpResponse, HttpResponseForbidden, HttpResponseRedirect
from django.shortcuts import render_to_response, get_object_or_404
from django.template import RequestContext
from django.views.generic import TemplateView, CreateView, UpdateView, DetailView, ListView, DeleteView, View
from django.views.generic.detail import SingleObjectMixin
from django.contrib import messages
from django.contrib.auth.decorators import login_required

import celery
from gargoyle import gargoyle

from eve_proxy.models import ApiAccessLog, CachedDocument
from eve_proxy.exceptions import DocumentRetrievalError
from eve_api.app_defines import *
from eve_api.forms import EVEAPIForm
from eve_api.models import EVEAccount, EVEPlayerCharacter, EVEPlayerCorporation, EVEPlayerAlliance
from eve_api.tasks import import_apikey_result
from eve_api.utils import basic_xml_parse_doc
from eve_api.views.mixins import DetailPaginationMixin


class EVEAPICreateView(CreateView):
    """Adds a EVE API key to the system"""

    model = EVEAccount
    form_class = EVEAPIForm
    success_url = reverse_lazy('sso-profile')

    def form_valid(self, form):
        task = import_apikey_result.delay(api_key=form.cleaned_data['api_key'], api_userid=form.cleaned_data['api_user_id'], user=request.user.id, retry=False)
        try:
            out = task.wait(10)
        except celery.exceptions.TimeoutError:
            msg = "The addition of your API key is still processing, please check back in a minute or so."
        except DocumentRetrievalError:
            msg = "An issue with the EVE API was encountered while adding your API, please try again later."
        except:
            msg = "An unknown error was encountered while trying to add your API key, please try again later."
        else:
            if out:
                msg = "Key %d successfully added." % form.cleaned_data['api_user_id']
            else:
                msg = "An issue was encountered while trying to import key %s, Please check that you are using the correct information and try again." % form.cleaned_data['api_user_id']
        messages.success(request, msg, fail_silently=True)
        return HttpResponseRedirect(self.get_success_url())

    def get_initial(self):
        return {'user': self.request.user.pk}


class EVEAPIUpdateView(UpdateView):
    """Updates a existing API key stored in the system"""

    model = EVEAccount
    form_class = EVEAPIForm
    success_url = reverse_lazy('sso-profile')

    def get_initial(self):
        return {'user': self.request.user.pk}

    def form_valid(self, form):
        msg = None
        if form.has_changed() and 'api_key' in form.changed_data:
            print "import"
            task = import_apikey_result.delay(api_key=form.cleaned_data['api_key'], api_userid=form.cleaned_data['api_user_id'], user=form.cleaned_data['user'], retry=False)
            try:
                acc = task.wait(30)
            except celery.exceptions.TimeoutError:
                msg = "The addition of your API key is still processing, please check back in a minute or so."
            except DocumentRetrievalError:
                msg = "An issue with the EVE API was encountered while adding your API, please try again later."
            except:
                msg = "An unknown error was encountered while trying to add your API key, please try again later."
            else:
                #form.save()
                if acc:
                    msg = "EVE API key %d successfully updated." % acc.api_user_id
                else:
                    messages.error(self.request, "An error was encountered while trying to update your API key, Please check your key and try again.", fail_silently=True)
        else:
            if form.has_changed():
                acc = form.save()
                msg = "EVE API key %d successfully updated." % acc.api_user_id

        if msg:
            messages.success(self.request, msg, fail_silently=True)
        return HttpResponseRedirect(self.get_success_url())


class EVEAPIDeleteView(DeleteView):
    """Deletes a EVE API key that exists within the system after confirmation"""

    model = EVEAccount
    success_url = reverse_lazy('sso-profile')

    def dispatch(self, request, *args, **kwargs):
        if not gargoyle.is_active('eve-keydelete', request):
            return HttpResponseForbidden()
        return super(EVEAPIDeleteView, self).dispatch(request, *args, **kwargs)

    def delete(self, request, *args, **kwargs):
        self.object = self.get_object()
        keyid = self.object.pk
        if not gargoyle.is_active('eve-softkeydelete', request):
            self.object.delete()
        else:
            self.object.user = None
            self.object.save()
        messages.success(self.request, 'EVE API key %s successfully deleted.' % keyid, fail_silently=True)
        return HttpResponseRedirect(self.get_success_url())


class EVEAPIRefreshView(SingleObjectMixin, View):
    """Force a refresh of a EVE API key, accepts requests via AJAX or normal requests"""
    
    model = EVEAccount
    
    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        if self.object.user != self.request.user and not request.user.is_superuser:
            return HttpResponseForbidden()
        task = import_apikey_result.delay(api_key=self.object.api_key, api_userid=self.object.api_user_id, force_cache=True, user=self.object.user.id)
        if self.request.is_ajax():
            try:
                acc = task.wait(30)
            except (celery.exceptions.TimeoutError, DocumentRetrievalError):
                acc = EVEAccount.objects.get(pk=userid)
            ret = []
            if acc:
                ret = [acc]
            return HttpResponse(serializers.serialize('json', ret), mimetype='application/javascript') 
        else:
            messages.add_message(self.request, messages.INFO, "Key %s has been queued to be refreshed from the API" % acc.api_user_id)
        return HttpResponseRedirect('/')            
    

class EVEAPILogView(ListView):
    """Shows EVE API access log for a particular API key"""

    model = ApiAccessLog
    template_name = 'eve_api/log.html'

    def dispatch(self, request, *args, **kwargs):
        self.userid = kwargs.pop('userid')
        if not (get_object_or_404(EVEAccount, pk=self.userid).user == request.user or request.user.is_superuser):
            return HttpResponseForbidden()
        return super(EVEAPILogView, self).dispatch(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        ctx = super(EVEAPILogView, self).get_context_data(**kwargs)
        ctx.update({
            'userid': self.userid,
        })
        return ctx

    def get_queryset(self):
        limit = getattr(self, 'limit', 50)
        return self.model.objects.filter(userid=self.userid).order_by('-time_access')[:limit]


class EVEAPICharacterDetailView(DetailView):

    model = EVEPlayerCharacter
    template_name = 'eve_api/character.html'

    def get(self, request, *args, **kwargs):
        self.object = self.get_object()
        if not request.user.has_perm('eve_api.can_view_all_characters') and (not self.object.account or not request.user == self.object.account.user):
            return HttpResponseForbidden()
        context = self.get_context_data(object=self.object)
        return self.render_to_response(context)

    def get_context_data(self, **kwargs):
        ctx = super(EVEAPICharacterDetailView, self).get_context_data(**kwargs)
        try:
            current_training = self.object.eveplayercharacterskill_set.get(in_training__gt=0)
        except:
            current_training = None
        skills = self.object.eveplayercharacterskill_set.all().order_by('skill__group__name', 'skill__name')

        skillTree = []
        currentSkillGroup = 0
        for skill in skills:
            if not skill.skill.group.id == currentSkillGroup:
                currentSkillGroup = skill.skill.group.id
                skillTree.append([0, skill.skill.group.name, [], skill.skill.group.id])

            skillTree[-1][0] += skill.skillpoints
            skillTree[-1][2].append(skill)

        ctx.update({
            'character': self.object,
            'current_training': current_training,
            'skills': skills,
            'skillTree': skillTree,
            'employmenthistory': self.object.employmenthistory.all().order_by('-record_id'),
        })
        return ctx


class EVEAPICharacterListView(TemplateView):

    template_name = 'eve_api/character_list.html'

    def get_context_data(self, **kwargs):
        ctx = {
            'accounts': EVEAccount.objects.select_related('characters__name').filter(user=self.request.user).exclude(api_keytype=API_KEYTYPE_CORPORATION),
            'characters': EVEPlayerCharacter.objects.filter(eveaccount__user=self.request.user).distinct().order_by('name'),
        }
        return ctx


class EVEAPICorporationView(DetailPaginationMixin, DetailView):

    model = EVEPlayerCorporation
    template_name = 'eve_api/corporation.html'
    detail_queryset_name = 'members'

    def get_pagination_queryset(self):
        return self.object.eveplayercharacter_set.select_related('eveaccount', 'roles').order_by('corporation_date').only('id', 'name', 'corporation_date')

    def get_context_data(self, **kwargs):
        ctx = super(EVEAPICorporationView, self).get_context_data(**kwargs)
        ctx.update({
            'corporation': self.object,
            'view_members': self.object.eveplayercharacter_set.filter(eveaccount__user=self.request.user, roles__name="roleDirector").count() or self.request.user.is_superuser,
        })
        return ctx


@login_required
def eveapi_corporation_members_csv(request, corporationid):

    corporation = get_object_or_404(EVEPlayerCorporation, id=corporationid)
    if not corporation.eveplayercharacter_set.filter(eveaccount__user=request.user, roles__name="roleDirector").count() and not request.user.is_superuser:
        return HttpResponseForbidden()

    response = HttpResponse(mimetype='text/csv')
    response['Content-Disposition'] = 'attachment; filename=%s-members_export.csv' % corporation.id

    writer = csv.writer(response)
    writer.writerow(['Name', 'Skillpoints', 'Join Date', 'Last Login', 'Director?', 'Roles?', 'API Key?'])
    for char in corporation.eveplayercharacter_set.all():
        writer.writerow([char.name, char.total_sp, char.corporation_date, char.last_login, char.director, char.roles.count(), char.eveaccount_set.all().count()])

    return response


class EVEAPIAllianceView(DetailPaginationMixin, DetailView):

    model = EVEPlayerAlliance
    template_name= 'eve_api/alliance.html'
    detail_queryset_name = 'corporations'

    def get_pagination_queryset(self):
        return self.object.eveplayercorporation_set.exclude(member_count=0).order_by('name')


    def get_context_data(self, **kwargs):
        ctx = super(EVEAPIAllianceView, self).get_context_data(**kwargs)
        ctx.update({
            'alliance': self.object,
            'executor': self.object.executor.ceo_character,
        })
        return ctx


class EVEAPIAccessView(DetailView):

    model = EVEAccount
    template_name = 'eve_api/accessview.html'
    slug_field = 'api_user_id'

    @staticmethod
    def lowestSet(int_type):
        low = (int_type & -int_type)
        lowBit = -1
        while (low):
            low >>= 1
            lowBit += 1
        return(lowBit)

    def get_context_data(self, **kwargs):
        ctx = super(EVEAPIAccessView, self).get_context_data(**kwargs)

        calls = basic_xml_parse_doc(CachedDocument.objects.api_query('/api/CallList.xml.aspx'))['eveapi']['result']
        if self.object.api_keytype == API_KEYTYPE_CORPORATION:
            typ = 'Corporation'
        else:
            typ = 'Character'

        ctx['access'] = []
        for row in [x for x in calls['calls'] if x['type'] == typ]:
            bit = self.lowestSet(int(row['accessMask']))
            ctx['access'].append((row['name'], self.object.has_access(bit)))

        return ctx