import json
from datetime import datetime
from io import BytesIO

import requests
from PIL import Image
from django.contrib import messages
from django.core.files import File
from django.utils.translation import gettext as _
from django.http import HttpResponseRedirect, HttpResponse
from django.shortcuts import redirect, render
from django.urls import reverse
from django.utils.translation import ngettext
from django_tables2 import RequestConfig

from cookbook.forms import SyncForm, BatchEditForm
from cookbook.helper.permission_helper import group_required, has_group_permission
from cookbook.models import *
from cookbook.tables import SyncTable


@group_required('user')
def sync(request):
    if request.method == "POST":
        if not has_group_permission(request.user, ['admin']):
            messages.add_message(request, messages.ERROR, _('You do not have the required permissions to view this page!'))
            return HttpResponseRedirect(reverse('data_sync'))
        form = SyncForm(request.POST)
        if form.is_valid():
            new_path = Sync()
            new_path.path = form.cleaned_data['path']
            new_path.storage = form.cleaned_data['storage']
            new_path.last_checked = datetime.now()
            new_path.save()
            return redirect('data_sync')
    else:
        form = SyncForm()

    monitored_paths = SyncTable(Sync.objects.all())
    RequestConfig(request, paginate={'per_page': 25}).configure(monitored_paths)

    return render(request, 'batch/monitor.html', {'form': form, 'monitored_paths': monitored_paths})


@group_required('user')
def sync_wait(request):
    return render(request, 'batch/waiting.html')


@group_required('user')
def batch_import(request):
    imports = RecipeImport.objects.all()
    for new_recipe in imports:
        recipe = Recipe(name=new_recipe.name, file_path=new_recipe.file_path, storage=new_recipe.storage, file_uid=new_recipe.file_uid, created_by=request.user)
        recipe.save()
        new_recipe.delete()

    return redirect('list_recipe_import')


@group_required('user')
def batch_edit(request):
    if request.method == "POST":
        form = BatchEditForm(request.POST)
        if form.is_valid():
            word = form.cleaned_data['search']
            keywords = form.cleaned_data['keywords']

            recipes = Recipe.objects.filter(name__icontains=word)
            count = 0
            for recipe in recipes:
                edit = False
                if keywords.__sizeof__() > 0:
                    recipe.keywords.add(*list(keywords))
                    edit = True
                if edit:
                    count = count + 1

                recipe.save()

            msg = ngettext(
                'Batch edit done. %(count)d recipe was updated.',
                'Batch edit done. %(count)d Recipes where updated.',
                count) % {
                      'count': count,
                  }
            messages.add_message(request, messages.SUCCESS, msg)

            return redirect('data_batch_edit')
    else:
        form = BatchEditForm()

    return render(request, 'batch/edit.html', {'form': form})


@group_required('user')
def import_url(request):
    if request.method == 'POST':
        data = json.loads(request.body)

        recipe = Recipe.objects.create(
            name=data['name'],
            instructions=data['recipeInstructions'],
            waiting_time=data['cookTime'],
            working_time=data['prepTime'],
            internal=True,
            created_by=request.user,
        )

        for kw in data['keywords']:
            if kw['id'] != "null" and (k := Keyword.objects.filter(id=kw['id']).first()):
                recipe.keywords.add(k)
            elif data['all_keywords']:
                k = Keyword.objects.create(name=kw['text'])
                recipe.keywords.add(k)

        for ing in data['recipeIngredient']:
            i, i_created = Food.objects.get_or_create(name=ing['ingredient']['text'])
            if ing['unit']:
                u, u_created = Unit.objects.get_or_create(name=ing['unit']['text'])
            else:
                u = Unit.objects.get(name=request.user.userpreference.default_unit)

            if isinstance(ing['amount'], str):
                try:
                    ing['amount'] = float(ing['amount'].replace(',', '.'))
                except ValueError:
                    # TODO return proper error
                    pass

            RecipeIngredient.objects.create(recipe=recipe, ingredient=i, unit=u, amount=ing['amount'])

        if data['image'] != '':
            response = requests.get(data['image'])
            img = Image.open(BytesIO(response.content))

            # todo move image processing to dedicated function
            basewidth = 720
            wpercent = (basewidth / float(img.size[0]))
            hsize = int((float(img.size[1]) * float(wpercent)))
            img = img.resize((basewidth, hsize), Image.ANTIALIAS)

            im_io = BytesIO()
            img.save(im_io, 'PNG', quality=70)
            recipe.image = File(im_io, name=f'{uuid.uuid4()}_{recipe.pk}.png')
            recipe.save()

        return HttpResponse(reverse('view_recipe', args=[recipe.pk]))

    return render(request, 'url_import.html', {})


class Object(object):
    pass


@group_required('user')
def statistics(request):
    counts = Object()
    counts.recipes = Recipe.objects.count()
    counts.keywords = Keyword.objects.count()
    counts.recipe_import = RecipeImport.objects.count()
    counts.units = Unit.objects.count()
    counts.ingredients = Food.objects.count()
    counts.comments = Comment.objects.count()

    counts.recipes_internal = Recipe.objects.filter(internal=True).count()
    counts.recipes_external = counts.recipes - counts.recipes_internal

    counts.recipes_no_keyword = Recipe.objects.filter(keywords=None).count()

    return render(request, 'stats.html', {'counts': counts})