from django.shortcuts import render
from django.http import HttpResponseRedirect
from django.contrib.auth.decorators import login_required
from django.core.mail import EmailMessage
from django.conf import settings

from rest_framework import permissions
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework.settings import api_settings
from rest_framework.exceptions import PermissionDenied
from rest_framework import status
from rest_framework.parsers import (
    JSONParser,
    MultiPartParser,
    FileUploadParser,
    FormParser,
)
from rest_framework.decorators import api_view
from cms.permissions import IsUserOrManager
from files.methods import is_mediacms_manager, is_mediacms_editor
from .models import User, Channel
from .forms import UserForm, ChannelForm
from .serializers import UserSerializer, UserDetailSerializer


def get_user(username):
    try:
        user = User.objects.get(username=username)
        return user
    except User.DoesNotExist:
        return None


def view_user(request, username):
    context = {}
    user = get_user(username=username)
    if not user:
        return HttpResponseRedirect("/members")
    context["user"] = user
    context["CAN_EDIT"] = (
        True
        if ((user and user == request.user) or is_mediacms_manager(request.user))
        else False
    )
    context["CAN_DELETE"] = True if is_mediacms_manager(request.user) else False
    context["SHOW_CONTACT_FORM"] = (
        True if (user.allow_contact or is_mediacms_editor(request.user)) else False
    )
    return render(request, "cms/user.html", context)


def view_user_media(request, username):
    context = {}
    user = get_user(username=username)
    if not user:
        return HttpResponseRedirect("/members")

    context["user"] = user
    context["CAN_EDIT"] = (
        True
        if ((user and user == request.user) or is_mediacms_manager(request.user))
        else False
    )
    context["CAN_DELETE"] = True if is_mediacms_manager(request.user) else False
    context["SHOW_CONTACT_FORM"] = (
        True if (user.allow_contact or is_mediacms_editor(request.user)) else False
    )
    return render(request, "cms/user_media.html", context)


def view_user_playlists(request, username):
    context = {}
    user = get_user(username=username)
    if not user:
        return HttpResponseRedirect("/members")

    context["user"] = user
    context["CAN_EDIT"] = (
        True
        if ((user and user == request.user) or is_mediacms_manager(request.user))
        else False
    )
    context["CAN_DELETE"] = True if is_mediacms_manager(request.user) else False
    context["SHOW_CONTACT_FORM"] = (
        True if (user.allow_contact or is_mediacms_editor(request.user)) else False
    )

    return render(request, "cms/user_playlists.html", context)


def view_user_about(request, username):
    context = {}
    user = get_user(username=username)
    if not user:
        return HttpResponseRedirect("/members")

    context["user"] = user
    context["CAN_EDIT"] = (
        True
        if ((user and user == request.user) or is_mediacms_manager(request.user))
        else False
    )
    context["CAN_DELETE"] = True if is_mediacms_manager(request.user) else False
    context["SHOW_CONTACT_FORM"] = (
        True if (user.allow_contact or is_mediacms_editor(request.user)) else False
    )

    return render(request, "cms/user_about.html", context)


@login_required
def edit_user(request, username):
    user = get_user(username=username)
    if not user or (user != request.user and not is_mediacms_manager(request.user)):
        return HttpResponseRedirect("/")

    if request.method == "POST":
        form = UserForm(request.user, request.POST, request.FILES, instance=user)
        if form.is_valid():
            user = form.save(commit=False)
            user.save()
            return HttpResponseRedirect(user.get_absolute_url())
    else:
        form = UserForm(request.user, instance=user)
    return render(request, "cms/user_edit.html", {"form": form})


def view_channel(request, friendly_token):
    context = {}
    channel = Channel.objects.filter(friendly_token=friendly_token).first()
    if not channel:
        user = None
    else:
        user = channel.user
    context["user"] = user
    context["CAN_EDIT"] = (
        True
        if ((user and user == request.user) or is_mediacms_manager(request.user))
        else False
    )
    return render(request, "cms/channel.html", context)


@login_required
def edit_channel(request, friendly_token):
    channel = Channel.objects.filter(friendly_token=friendly_token).first()
    if not (
        channel and request.user.is_authenticated and (request.user == channel.user)
    ):
        return HttpResponseRedirect("/")

    if request.method == "POST":
        form = ChannelForm(request.POST, request.FILES, instance=channel)
        if form.is_valid():
            channel = form.save(commit=False)
            channel.save()
            return HttpResponseRedirect(request.user.get_absolute_url())
    else:
        form = ChannelForm(instance=channel)
    return render(request, "cms/channel_edit.html", {"form": form})


@api_view(["POST"])
def contact_user(request, username):
    if not request.user.is_authenticated:
        return Response(
            {"detail": "request need be authenticated"},
            status=status.HTTP_401_UNAUTHORIZED,
        )
    user = User.objects.filter(username=username).first()
    if user and (user.allow_contact or is_mediacms_editor(request.user)):
        subject = request.data.get("subject")
        from_email = request.user.email
        subject = f"[{settings.PORTAL_NAME}] - Message from {from_email}"
        body = request.data.get("body")
        body = """
You have received a message through the contact form\n
Sender name: %s
Sender email: %s\n
\n %s
""" % (
            request.user.name,
            from_email,
            body,
        )
        email = EmailMessage(
            subject,
            body,
            settings.DEFAULT_FROM_EMAIL,
            [user.email],
            reply_to=[from_email],
        )
        email.send(fail_silently=True)

    return Response(status=status.HTTP_204_NO_CONTENT)


class UserList(APIView):
    permission_classes = (permissions.IsAuthenticatedOrReadOnly,)
    parser_classes = (JSONParser, MultiPartParser, FormParser, FileUploadParser)

    def get(self, request, format=None):
        pagination_class = api_settings.DEFAULT_PAGINATION_CLASS
        paginator = pagination_class()
        users = User.objects.filter()
        location = request.GET.get("location", "").strip()
        if location:
            users = users.filter(location=location)

        page = paginator.paginate_queryset(users, request)

        serializer = UserSerializer(page, many=True, context={"request": request})
        return paginator.get_paginated_response(serializer.data)


class UserDetail(APIView):
    """"""

    permission_classes = (permissions.IsAuthenticatedOrReadOnly, IsUserOrManager)
    parser_classes = (JSONParser, MultiPartParser, FormParser, FileUploadParser)

    def get_user(self, username):
        try:
            user = User.objects.get(username=username)
            # this need be explicitly called, and will call
            # has_object_permission() after has_permission has succeeded
            self.check_object_permissions(self.request, user)
            return user
        except PermissionDenied:
            return Response(
                {"detail": "not enough permissions"}, status=status.HTTP_400_BAD_REQUEST
            )
        except User.DoesNotExist:
            return Response(
                {"detail": "user does not exist"}, status=status.HTTP_400_BAD_REQUEST
            )

    def get(self, request, username, format=None):
        # Get user details
        user = self.get_user(username)
        if isinstance(user, Response):
            return user

        serializer = UserDetailSerializer(user, context={"request": request})
        return Response(serializer.data)

    def post(self, request, uid, format=None):
        # USER
        user = self.get_user(uid)
        if isinstance(user, Response):
            return user

        serializer = UserDetailSerializer(
            user, data=request.data, context={"request": request}
        )
        if serializer.is_valid():
            logo = request.data.get("logo")
            if logo:
                serializer.save(logo=logo)
            else:
                serializer.save()

            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    def put(self, request, uid, format=None):
        # ADMIN
        user = self.get_user(uid)
        if isinstance(user, Response):
            return user

        if not request.user.is_superuser:
            return Response(
                {"detail": "not allowed"}, status=status.HTTP_400_BAD_REQUEST
            )

        action = request.data.get("action")
        if action == "feature":
            user.is_featured = True
            user.save()
        elif action == "unfeature":
            user.is_featured = False
            user.save()

        serializer = UserDetailSerializer(user, context={"request": request})
        return Response(serializer.data)

    def delete(self, request, username, format=None):
        # Delete a user
        user = self.get_user(username)
        if isinstance(user, Response):
            return user

        user.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)