# Copyright (C) 2018-2024 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later

from django.db import transaction
from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpResponseRedirect
from django_tables2.views import MultiTableMixin
from django.urls import reverse
from django.utils.translation import gettext_lazy as _
from django.utils import timezone
from django.views.generic import DetailView, UpdateView, TemplateView
from django.views.generic.list import ListView
from permission.backends import PermissionBackend
from permission.views import ProtectQuerysetMixin, ProtectedCreateView
from member.models import Club
from note_kfet.middlewares import get_current_request

from .forms import AddIngredientForms, BasicFoodForms, QRCodeForms, TransformedFoodForms
from .models import BasicFood, Food, QRCode, TransformedFood
from .tables import TransformedFoodTable


class AddIngredientView(ProtectQuerysetMixin, UpdateView):
    """
    A view to add an ingredient
    """
    model = Food
    template_name = 'food/add_ingredient_form.html'
    extra_context = {"title": _("Add the ingredient")}
    form_class = AddIngredientForms

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["pk"] = self.kwargs["pk"]
        return context

    @transaction.atomic
    def form_valid(self, form):
        form.instance.creater = self.request.user
        food = Food.objects.get(pk=self.kwargs['pk'])
        add_ingredient_form = AddIngredientForms(data=self.request.POST)
        if not food.is_ready:
            form.add_error(None, _("The product isn't ready"))
            return self.form_invalid(form)
        if not add_ingredient_form.is_valid():
            return self.form_invalid(form)

        # Save the aliment and the allergens associed
        for transformed_pk in self.request.POST.getlist('ingredient'):
            transformed = TransformedFood.objects.get(pk=transformed_pk)
            if not transformed.is_ready:
                transformed.ingredient.add(food)
                transformed.update()
        return HttpResponseRedirect(self.get_success_url())

    def get_success_url(self, **kwargs):
        return reverse('food:food_list')


class BasicFoodUpdateView(ProtectQuerysetMixin, LoginRequiredMixin, UpdateView):
    """
    A view to add a basic food
    """
    model = BasicFood
    form_class = BasicFoodForms
    template_name = 'food/basic_food_form.html'
    extra_context = {"title": _("Add a new aliment")}

    @transaction.atomic
    def form_valid(self, form):
        form.instance.creater = self.request.user
        basic_food_form = BasicFoodForms(data=self.request.POST)
        if not basic_food_form.is_valid():
            return self.form_invalid(form)

        ans = super().form_valid(form)
        form.instance.update()
        return ans

    def get_success_url(self, **kwargs):
        self.object.refresh_from_db()
        return reverse('food:food_view', kwargs={"pk": self.object.pk})


class FoodCreateView(ProtectQuerysetMixin, LoginRequiredMixin, TemplateView):
    """
    A view to add a new aliment
    """
    template_name = 'food/create_food_form.html'
    extra_context = {"title": _("Add a new aliment")}


class FoodView(ProtectQuerysetMixin, LoginRequiredMixin, DetailView):
    """
    A view to see a food
    """
    model = Food
    extra_context = {"title": _("Details")}
    context_object_name = "food"


class QRCodeBasicFoodCreateView(ProtectQuerysetMixin, ProtectedCreateView):
    #####################################################################
    # TO DO
    # - fix picture save
    # - implement solution crop and convert image (reuse or recode ImageForm from members apps)
    #####################################################################
    """
    A view to add a basic food with a qrcode
    """
    model = BasicFood
    form_class = BasicFoodForms
    template_name = 'food/basic_food_form.html'
    extra_context = {"title": _("Add a new basic food with QRCode")}

    @transaction.atomic
    def form_valid(self, form):
        form.instance.creater = self.request.user
        basic_food_form = BasicFoodForms(data=self.request.POST)
        if not basic_food_form.is_valid():
            return self.form_invalid(form)

        # Save the aliment and the allergens associed
        basic_food = form.save(commit=False)
        # We assume the date of labeling and the same as the date of arrival
        basic_food.arrival_date = timezone.now()
        basic_food.is_ready = True
        basic_food._force_save = True
        basic_food.save()
        basic_food.refresh_from_db()

        qrcode = QRCode()
        qrcode.qr_code_number = self.kwargs['slug']
        qrcode.food_container = basic_food
        qrcode.save()

        return super().form_valid(form)

    def get_success_url(self, **kwargs):
        self.object.refresh_from_db()
        return reverse('food:qrcode_view', kwargs={"slug": self.kwargs['slug']})

    def get_sample_object(self):
        return BasicFood(
            name="",
            expiry_date=timezone.now(),
        )


class QRCodeCreateView(ProtectQuerysetMixin, ProtectedCreateView):
    """
    A view to add a new qrcode
    """
    model = QRCode
    template_name = 'food/create_qrcode_form.html'
    form_class = QRCodeForms
    extra_context = {"title": _("Add a new QRCode")}

    def get(self, *args, **kwargs):
        qrcode = kwargs["slug"]
        if self.model.objects.filter(qr_code_number=qrcode).count() > 0:
            return HttpResponseRedirect(reverse("food:qrcode_view", kwargs=kwargs))
        else:
            return super().get(*args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context["slug"] = self.kwargs["slug"]
        return context

    @transaction.atomic
    def form_valid(self, form):
        form.instance.creater = self.request.user
        qrcode_food_form = QRCodeForms(data=self.request.POST)
        if not qrcode_food_form.is_valid():
            return self.form_invalid(form)

        # Save the qrcode
        qrcode = form.save(commit=False)
        qrcode.qr_code_number = self.kwargs["slug"]
        qrcode._force_save = True
        qrcode.save()
        qrcode.refresh_from_db()

        qrcode.food_container.is_ready = True
        qrcode.food_container.save()

        return super().form_valid(form)

    def get_success_url(self, **kwargs):
        self.object.refresh_from_db()
        return reverse('food:qrcode_view', kwargs={"slug": self.kwargs['slug']})

    def get_sample_object(self):
        return QRCode(
            qr_code_number=self.kwargs["slug"],
        )


class QRCodeView(ProtectQuerysetMixin, LoginRequiredMixin, DetailView):
    """
    A view to see a qrcode
    """
    model = QRCode
    extra_context = {"title": _("QRCode")}
    context_object_name = "qrcode"
    slug_field = "qr_code_number"

    def get(self, *args, **kwargs):
        qrcode = kwargs["slug"]
        if self.model.objects.filter(qr_code_number=qrcode).count() > 0:
            return super().get(*args, **kwargs)
        else:
            return HttpResponseRedirect(reverse("food:qrcode_create", kwargs=kwargs))


class TransformedFoodFormView(ProtectQuerysetMixin):
    """
    A view to add a tranformed food
    """
    model = TransformedFood
    template_name = 'food/transformed_food_form.html'
    form_class = TransformedFoodForms
    extra_context = {"title": _("Add a new meal")}

    @transaction.atomic
    def form_valid(self, form):
        form.instance.creater = self.request.user
        transformed_food_form = TransformedFoodForms(data=self.request.POST)
        if not transformed_food_form.is_valid():
            return self.form_invalid(form)

        # Save the aliment and allergens associated
        transformed_food = form.save(commit=False)
        transformed_food.expiry_date = transformed_food.creation_date
        transformed_food._force_save = True
        transformed_food.save()
        transformed_food.refresh_from_db()
        ans = super().form_valid(form)
        transformed_food.update()
        return ans

    def get_success_url(self, **kwargs):
        self.object.refresh_from_db()
        return reverse('food:food_view', kwargs={"pk": self.object.pk})


class TransformedFoodUpdateView(TransformedFoodFormView, LoginRequiredMixin, UpdateView):
    pass


class TransformedFoodCreateView(TransformedFoodFormView, ProtectedCreateView):
    def get_sample_object(self):
        return TransformedFood(
            name="",
            creation_date=timezone.now(),
        )


class TransformedListView(ProtectQuerysetMixin, LoginRequiredMixin, MultiTableMixin, ListView):
    """
    Displays ready TransformedFood
    """
    model = TransformedFood
    tables = [TransformedFoodTable, TransformedFoodTable, TransformedFoodTable]
    extra_context = {"title": _("Transformed food")}

    def get_queryset(self, **kwargs):
        return super().get_queryset(**kwargs).distinct()

    def get_tables(self):
        tables = super().get_tables()

        tables[0].prefix = "all-"
        tables[1].prefix = "open-"
        tables[2].prefix = "served-"
        return tables

    def get_tables_data(self):
        # first table = all transformed food, second table = free, third = served
        return [
            self.get_queryset().order_by("-creation_date"),
            TransformedFood.objects.filter(is_ready=True,is_active=True,was_eaten=False,expiry_date__lt=timezone.now())
                                   .filter(PermissionBackend.filter_queryset(self.request, TransformedFood, "view"))
                                   .distinct()
                                   .order_by("-creation_date"),
            TransformedFood.objects.filter(is_ready=True,is_active=True,was_eaten=False,expiry_date__gte=timezone.now())
                                   .filter(PermissionBackend.filter_queryset(self.request, TransformedFood, "view"))
                                   .distinct()
                                   .order_by("-creation_date")
        ]

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

        # context["can_create_meal"] = PermissionBackend.check_perm(self.request, "food.add_transformedfood", TransformedFood(creation_date = timezone.now(), name = "", expiry_date = timezone.now(), owner = ))   <- défi prendre un club qui fonctionne (s'il existe)  pour l'utilisateur
        context["can_create_meal"] = True

        tables = context["tables"]
        for name, table in zip(["table", "open", "served"], tables):
            context[name] = table
        return context