import json
from django.shortcuts import render
from django.conf import settings
from django.views.generic import View,CreateView
from django.http import HttpResponse, Http404
from django.db.models import Q
from django.contrib.auth.mixins import LoginRequiredMixin
from wsgiref.util import FileWrapper

from .response import JSONResponse, response_mimetype
from .utils import serialize
from .models import Message, Documents
from projects.models import Order, Project
from wallets.models import Transaction
from users.models import User, Team


class DocumentCreateView(CreateView):
    model = Documents
    fields = '__all__'

    def form_valid(self, form):
        self.object = form.save()
        files = [serialize(self.object)]
        data = {'files': files}
        response = JSONResponse(data, mimetype=response_mimetype(self.request))
        response['Content-Disposition'] = 'inline; filename=files.json'
        return response

    def form_invalid(self, form):
        # import code; code.interact(local=dict(globals(), **locals()))
        data = json.dumps(form.errors)
        return HttpResponse(content=data, status=400, content_type='application/json')


class ChatUserView(LoginRequiredMixin, View):
    template_name = ''

    def get(self, request, *args, **kwargs):
        user_id = request.GET.get('user_id',None)
        if request.user.is_customer():
            customer_contacts = Message.objects.values_list('sender_id', 'recipent_id'). \
                filter(Q(recipent_id=request.user.pk) | Q(sender_id=request.user.pk)).\
                filter(Q(team_id=None)).\
                filter(is_delete=False).distinct()

            users_ids = []
            for msg in customer_contacts:
                a, b = msg
                if a != request.user.pk:
                    users_ids.append(a)
                if b != request.user.pk:
                    users_ids.append(b)
            if user_id:
                users_ids.append(int(user_id))
            contacts_users = User.objects.filter(pk__in=users_ids)

            chat_messages = Message.objects.filter(Q(sender=request.user.pk) | Q(recipent=request.user.pk))
            orders = request.user.customer_projects.select_related('order').filter(state='active').exclude(order__contractor__isnull=True, order__team__isnull=True)
            transaction = Transaction.objects.get_or_create(customer=request.user, type='reservation', complete=False)
            self.template_name = 'chat_customer.html'
            return render(request, self.template_name, {'contacts_users': contacts_users,
                                                        'chat_messages': chat_messages,
                                                        'orders': orders,
                                                        'transaction': transaction[0],
                                                        'YANDEX_MONEY': settings.YANDEX_MONEY,
                                                        })
        else:
            team_ids = []
            if request.user.is_owner_team():
                team_ids.append(request.user.team.pk)
                team_orders = request.user.team.orders.all()
                # teams = Team.objects.filter(contractors__id=request.user.pk).all()
            else:
                teams = Team.objects.filter(contractors__id=request.user.pk).all()
                team_orders = Order.objects.filter(team_id__in=[team.pk for team in teams]).all()

            orders = Order.objects.filter(Q(contractor=request.user) | Q(team_id__in=team_ids)).filter(project__state='active').all()
            contractor_contacts = Message.objects.values_list('sender_id', 'recipent_id').filter(
                Q(recipent_id=request.user.pk) | Q(sender_id=request.user.pk)).filter(Q(team_id=None)).\
                filter(is_delete=False).distinct()
            users_ids = []
            for msg in contractor_contacts:
                a, b = msg
                if a != request.user.pk:
                    users_ids.append(a)
                if b != request.user.pk:
                    users_ids.append(b)
            if user_id:
                users_ids.append(int(user_id))
            contacts_users = User.objects.filter(pk__in=users_ids)
            chat_messages = Message.objects.filter(Q(sender=request.user.pk) | Q(recipent=request.user.pk)).order_by(
                'created')

            your_teams = Team.objects.filter(Q(contractors__id=request.user.pk) | Q(owner=request.user))
            self.template_name = 'chat_contractor.html'
            return render(request, self.template_name, {'orders': orders,
                                                        'contacts_users': contacts_users,
                                                        'chat_messages': chat_messages,
                                                        'team_orders': team_orders,
                                                        'your_teams': your_teams,
                                                        })


def messages_delete(request):
    if request.is_ajax():
        sender = request.POST.get('sender_id')
        recipent = request.POST.get('recipent_id')
        queryset = Message.objects.all()
        queryset = queryset.filter(Q(sender__in=[sender, recipent]), Q(recipent__in=[sender, recipent]))
        queryset.update(is_delete=True)
        data = {'status': 'ok'}
        return HttpResponse(json.dumps(data), content_type='application/json')
    else:
        raise Http404


def project_delete(request):
    if request.is_ajax():
        project_id = request.POST.get('project_id')
        try:
            project = Project.objects.get(pk=project_id,customer=request.user)
        except Documents.DoesNotExist:
            project = None
        if project:
            project.state = 'trashed'
            project.save()
            data = {'status': 'ok'}
        else:
            data = {'status': 'error'}
        return HttpResponse(json.dumps(data), content_type='application/json')
    else:
        raise Http404


def download_file(request,file_name):
    try:
        document = Documents.objects.get(file=file_name)
    except Documents.DoesNotExist:
        document = None

    file_name = document.file
    response = HttpResponse(FileWrapper(file_name), content_type='application/force-download')
    response['Content-Disposition'] = 'attachment; filename=' + file_name.name
    return response