from datetime import datetime, timedelta
import time

from django.shortcuts import render_to_response
from django.core.urlresolvers import reverse
from django.http import HttpResponseRedirect, HttpResponse, HttpResponseForbidden, Http404
from django.template import RequestContext
from django.utils.translation import ugettext as _
from django.utils import simplejson
from django.db.models import Sum

from forum.settings.base import Setting
from forum.settings.forms import SettingsSetForm

from forum.models import Question, Answer, User, Node, Action
from forum import settings

def super_user_required(fn):
    def wrapper(request, *args, **kwargs):
        if request.user.is_authenticated() and request.user.is_superuser:
            return fn(request, *args, **kwargs)
        else:
            return HttpResponseForbidden()

    return wrapper

def admin_page(fn):
    @super_user_required
    def wrapper(request, *args, **kwargs):
        res = fn(request, *args, **kwargs)
        if isinstance(res, tuple):
            template, context = res
            context['basetemplate'] = settings.DJSTYLE_ADMIN_INTERFACE and "osqaadmin/djstyle_base.html" or "osqaadmin/base.html"
            context['allsets'] = Setting.sets
            context['othersets'] = sorted(
                    [s for s in Setting.sets.values() if not s.name in
                    ('basic', 'users', 'email', 'paths', 'extkeys', 'repgain', 'minrep', 'voting', 'badges', 'about', 'faq', 'sidebar',
                    'form', 'moderation')]
                    , lambda s1, s2: s1.weight - s2.weight)
            return render_to_response(template, context, context_instance=RequestContext(request))
        else:
            return res

    return wrapper

@admin_page
def dashboard(request):
    return ('osqaadmin/dashboard.html', {
        'settings_pack': unicode(settings.SETTINGS_PACK),
        'statistics': get_statistics(),
        'recent_activity': get_recent_activity(),
    })

@super_user_required
def interface_switch(request):
    if request.GET and request.GET.get('to', None) and request.GET['to'] in ('default', 'djstyle'):
        settings.DJSTYLE_ADMIN_INTERFACE.set_value(request.GET['to'] == 'djstyle')

    return HttpResponseRedirect(reverse('admin_index'))

@admin_page
def statistics(request):
    today = datetime.now()
    last_month = today - timedelta(days=30)

    last_month_questions = Question.objects.filter(deleted=None, added_at__gt=last_month
                                                  ).order_by('added_at').values_list('added_at', flat=True)

    last_month_n_questions = Question.objects.filter(deleted=None, added_at__lt=last_month).count()
    qgraph_data = simplejson.dumps([
            (time.mktime(d.timetuple()) * 1000, i + last_month_n_questions)
            for i, d in enumerate(last_month_questions)
    ])

    last_month_users = User.objects.filter(date_joined__gt=last_month
                                                  ).order_by('date_joined').values_list('date_joined', flat=True)

    last_month_n_users = User.objects.filter(date_joined__lt=last_month).count()

    ugraph_data = simplejson.dumps([
            (time.mktime(d.timetuple()) * 1000, i + last_month_n_users)
            for i, d in enumerate(last_month_users)
    ])

    return 'osqaadmin/statistics.html', {
        'graphs': [
            {
                'id': 'questions_graph',
                'caption': _("Questions Graph"),
                'data': qgraph_data
            },{
                'id': 'userss_graph',
                'caption': _("Users Graph"),
                'data': ugraph_data
            }
        ]
    }


@admin_page
def settings_set(request, set_name):
    set = Setting.sets.get(set_name, None)

    if set is None:
        raise Http404

    if request.POST:
        form = SettingsSetForm(set, data=request.POST, files=request.FILES)

        if form.is_valid():
            form.save()
            request.user.message_set.create(message=_("'%s' settings saved succesfully") % set_name)

            if set_name in ('minrep', 'badges', 'repgain'):
                settings.SETTINGS_PACK.set_value("custom")

            return HttpResponseRedirect(reverse('admin_set', args=[set_name]))
    else:
        form = SettingsSetForm(set)

    return 'osqaadmin/set.html', {
        'form': form,
        'markdown': set.markdown,
    }

@super_user_required
def get_default(request, set_name, var_name):
    set = Setting.sets.get(set_name, None)
    if set is None: raise Http404

    setting = dict([(s.name, s) for s in set]).get(var_name, None)
    if setting is None: raise Http404

    setting.to_default()

    if request.is_ajax():
        return HttpResponse(setting.default)
    else:
        return HttpResponseRedirect(reverse('admin_set', kwargs={'set_name': set_name}))


def get_recent_activity():
    return Action.objects.order_by('-action_date')[0:30]

def get_statistics():
    return {
        'total_users': User.objects.all().count(),
        'users_last_24': User.objects.filter(date_joined__gt=(datetime.now() - timedelta(days=1))).count(),
        'total_questions': Question.objects.filter(deleted=None).count(),
        'questions_last_24': Question.objects.filter(deleted=None, added_at__gt=(datetime.now() - timedelta(days=1))).count(),
        'total_answers': Answer.objects.filter(deleted=None).count(),
        'answers_last_24': Answer.objects.filter(deleted=None, added_at__gt=(datetime.now() - timedelta(days=1))).count(),
    }

@super_user_required
def go_bootstrap(request):
    #todo: this is the quick and dirty way of implementing a bootstrap mode
    try:
        from forum_modules.default_badges import settings as dbsets
        dbsets.POPULAR_QUESTION_VIEWS.set_value(100)
        dbsets.NOTABLE_QUESTION_VIEWS.set_value(200)
        dbsets.FAMOUS_QUESTION_VIEWS.set_value(300)
        dbsets.NICE_ANSWER_VOTES_UP.set_value(2)
        dbsets.NICE_QUESTION_VOTES_UP.set_value(2)
        dbsets.GOOD_ANSWER_VOTES_UP.set_value(4)
        dbsets.GOOD_QUESTION_VOTES_UP.set_value(4)
        dbsets.GREAT_ANSWER_VOTES_UP.set_value(8)
        dbsets.GREAT_QUESTION_VOTES_UP.set_value(8)
        dbsets.FAVORITE_QUESTION_FAVS.set_value(1)
        dbsets.STELLAR_QUESTION_FAVS.set_value(3)
        dbsets.DISCIPLINED_MIN_SCORE.set_value(3)
        dbsets.PEER_PRESSURE_MAX_SCORE.set_value(-3)
        dbsets.CIVIC_DUTY_VOTES.set_value(15)
        dbsets.PUNDIT_COMMENT_COUNT.set_value(10)
        dbsets.SELF_LEARNER_UP_VOTES.set_value(2)
        dbsets.STRUNK_AND_WHITE_EDITS.set_value(10)
        dbsets.ENLIGHTENED_UP_VOTES.set_value(2)
        dbsets.GURU_UP_VOTES.set_value(4)
        dbsets.NECROMANCER_UP_VOTES.set_value(2)
        dbsets.NECROMANCER_DIF_DAYS.set_value(30)
        dbsets.TAXONOMIST_USE_COUNT.set_value(5)
    except:
        pass

    settings.REP_TO_VOTE_UP.set_value(0)
    settings.REP_TO_VOTE_DOWN.set_value(15)
    settings.REP_TO_FLAG.set_value(15)
    settings.REP_TO_COMMENT.set_value(0)
    settings.REP_TO_LIKE_COMMENT.set_value(0)
    settings.REP_TO_UPLOAD.set_value(0)
    settings.REP_TO_CLOSE_OWN.set_value(60)
    settings.REP_TO_REOPEN_OWN.set_value(120)
    settings.REP_TO_RETAG.set_value(150)
    settings.REP_TO_EDIT_WIKI.set_value(200)
    settings.REP_TO_EDIT_OTHERS.set_value(400)
    settings.REP_TO_CLOSE_OTHERS.set_value(600)
    settings.REP_TO_DELETE_COMMENTS.set_value(400)
    settings.REP_TO_VIEW_FLAGS.set_value(30)

    settings.INITIAL_REP.set_value(1)
    settings.MAX_REP_BY_UPVOTE_DAY.set_value(300)
    settings.REP_GAIN_BY_UPVOTED.set_value(15)
    settings.REP_LOST_BY_UPVOTE_CANCELED.set_value(15)
    settings.REP_LOST_BY_DOWNVOTED.set_value(1)
    settings.REP_LOST_BY_DOWNVOTING.set_value(0)
    settings.REP_GAIN_BY_DOWNVOTE_CANCELED.set_value(1)
    settings.REP_GAIN_BY_CANCELING_DOWNVOTE.set_value(0)
    settings.REP_GAIN_BY_ACCEPTED.set_value(25)
    settings.REP_LOST_BY_ACCEPTED_CANCELED.set_value(25)
    settings.REP_GAIN_BY_ACCEPTING.set_value(5)
    settings.REP_LOST_BY_CANCELING_ACCEPTED.set_value(5)
    settings.REP_LOST_BY_FLAGGED.set_value(2)
    settings.REP_LOST_BY_FLAGGED_3_TIMES.set_value(30)
    settings.REP_LOST_BY_FLAGGED_5_TIMES.set_value(100)

    settings.SETTINGS_PACK.set_value("bootstrap")

    request.user.message_set.create(message=_('Bootstrap mode enabled'))
    return HttpResponseRedirect(reverse('admin_index'))

@super_user_required
def go_defaults(request):
    for setting in Setting.sets['badges']:
        setting.to_default()
    for setting in Setting.sets['minrep']:
        setting.to_default()
    for setting in Setting.sets['repgain']:
        setting.to_default()

    settings.SETTINGS_PACK.set_value("default")

    request.user.message_set.create(message=_('All values reverted to defaults'))
    return HttpResponseRedirect(reverse('admin_index'))


@super_user_required
def recalculate_denormalized(request):
    for n in Node.objects.all():
        n = n.leaf
        n.score = n.votes.aggregate(score=Sum('value'))['score']
        if not n.score: n.score = 0
        n.save()

    for u in User.objects.all():
        u.reputation = u.reputes.aggregate(reputation=Sum('value'))['reputation']
        u.save()

    request.user.message_set.create(message=_('All values recalculated'))
    return HttpResponseRedirect(reverse('admin_index'))

