# Copyright © 2022 Aravinth Manivannan <realaravinth@batsense.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
from django.shortcuts import render, redirect, get_object_or_404
from django.utils.http import urlencode
from django.contrib.auth import authenticate, login, logout
from django.contrib.auth import get_user_model
from django.contrib.auth.decorators import login_required
from django.http import HttpResponse
from django.views.decorators.csrf import csrf_protect
from django.urls import reverse

from accounts.decorators import confirm_access
from dash.models import Instance
from billing.utils import payment_fullfilled

from .utils import create_vm_if_not_exists


def default_ctx(title: str, username: str):
    """
    Default context for all dashboard pages
    """
    return {
        "title": title,
        "username": username,
        "open_instances": "open",
    }


@login_required
def create_instance(request, instance_name: str):
    """
    Dashboard homepage view
    """
    instance = get_object_or_404(Instance, name=instance_name, owned_by=request.user)
    if not payment_fullfilled(instance=instance):
        return redirect(reverse("billing.invoice.generate", args=(instance_name,)))

    create_vm_if_not_exists()

    return HttpResponse()


@login_required
@confirm_access
def delete_instance(request, instance_name: str):
    """
    Dashboard homepage view
    """
    instance = get_object_or_404(Instance, name=instance_name, owned_by=request.user)
    infra = Infra()
    infra.remove_vm(instance=instance)
    # TODO: push isn't implemented yet
    return HttpResponse()