# -*- coding: utf-8 -*-
from django.shortcuts import render, redirect, get_object_or_404
from django.views.decorators.csrf import csrf_protect
from django.contrib.auth.decorators import login_required

from project.commons.paginator import pagination, save_per_page_value

from .. import models, forms


@login_required
@csrf_protect
@save_per_page_value
def clients_list(request, page_num=None):
    """Список контрагентов пользователя."""
    template_name='customer/clients/list.html'

    client_list = models.Client.objects.filter(user=request.user).order_by('name', '-created_at')
    page, pagination_form = pagination(request, client_list, page_num)

    client_form = forms.ClientForm()

    dictionary = {
        'page': page,
        'pagination_form': pagination_form,
        'client_form': client_form,
    }
    return render(request, template_name, dictionary)


@login_required
@csrf_protect
def clients_add(request):
    """Добавить контрагента."""
    template_name='customer/clients/add.html'
    success_url = 'customer_clients_list'
    form_class = forms.ClientForm

    if request.method == 'POST' and '_cancel' in request.POST:
        return redirect(success_url)

    if request.method == 'POST':
        form = form_class(data=request.POST)
        if form.is_valid():
            new_client = form.save(commit=False)
            new_client.user = request.user
            new_client.save()
            return redirect(success_url)
    else:
        form = form_class()

    return render(request, template_name, {'form': form,})


@login_required
@csrf_protect
def clients_edit(request, id):
    """Редактировать контрагента."""
    template_name='customer/clients/edit.html'
    success_url = 'customer_clients_list'

    if request.method == 'POST' and '_cancel' in request.POST:
        return redirect(success_url)

    form_class = forms.ClientForm

    client = get_object_or_404(models.Client, pk=id, user=request.user)

    if request.method == 'POST':
        form = form_class(data=request.POST, instance=client)
        if form.is_valid():
            form.save()
            return redirect(success_url)
    else:
        form = form_class(instance=client)

    dictionary = {
        'client': client,
        'form': form,
    }
    return render(request, template_name, dictionary)


@login_required
@csrf_protect
def clients_delete(request, id):
    """Удалить контрагента."""
    template_name='customer/clients/delete.html'
    success_url = 'customer_clients_list'

    if request.method == 'POST' and '_cancel' in request.POST:
        return redirect(success_url)

    client = get_object_or_404(models.Client, pk=id, user=request.user)

    if request.method == 'POST':
        client.delete()
        # TODO обработать ошибки удаления
        return redirect(success_url)

    return render(request, template_name, {'client': client,})