from django.shortcuts import render
from django.contrib.auth.decorators import permission_required, login_required
from django.views.decorators.http import require_http_methods
from django.views.decorators.csrf import ensure_csrf_cookie
from django.http import HttpResponse, HttpResponseRedirect
from django.conf import settings
from django.utils.translation import ugettext as _
from django.forms.models import model_to_dict
from django.template.loader import render_to_string

import logging
import html

from webapp.utils import send_email

from members.views.utils import *
from members.tables import RequestTable
from members.forms import ApplicationForm
from members.views import error_view


@ensure_csrf_cookie
@require_http_methods(["GET"])
@login_required(login_url="/admin/login")
@permission_required("members.read_application", raise_exception=True)
def application_list(request, *args, **kwargs):
    """List member applications not yet processed."""
    applications = Request.objects.all()
    application_count = len(applications)
    table = RequestTable(
        applications,
        request=request,
        exclude=["id"],
        attrs={"class": "table table-bordered table-hover"},
    )

    table.paginate(page=request.GET.get("page", 1), per_page=25)
    table_html = convert_table_to_html(table, request)
    context = {
        "table": table_html,
        "application_count": application_count,
        "notification": request.GET.get("notification", None),
    }
    return render(request, "application_list.html", context)


@ensure_csrf_cookie
@require_http_methods(["GET"])
@login_required(login_url="/admin/login")
@permission_required("members.change_request", raise_exception=True)
def application_edit(request, *args, **kwargs):
    """Edit member request information."""
    i = kwargs.pop("index", None)
    if i is None:
        return error_view(request, _("No application id specified"))
    else:
        application = Request.objects.get(id=i)
        form = ApplicationForm(instance=application)
        return render(
            request, "application_edit.html", {"application_id": i, "form": form}
        )


@ensure_csrf_cookie
@require_http_methods(["POST"])
@login_required(login_url="/admin/login")
@permission_required("members.add_member", raise_exception=True)
def application_accept(request, *args, **kwargs):
    """Accept application."""
    id = request.POST.get("id", None)
    if id is not None:
        application = Request.objects.get(id=id)
    else:
        return error_view(request, _("Application missing 'id' field."))

    form = ApplicationForm(request.POST, instance=application)
    if form.is_valid():
        try:
            application = form.save()

            if Member.objects.filter(email=application.email).exists():
                return error_view(
                    request,
                    _(
                        "Email {} is already in use by a member. Application cannot be accepted."
                    ).format(application.email),
                )

            member = application.to_member()
            member.save()
            application.delete()

            logging.info(
                "Accepted application in member "
                "register with the following info: {}".format(form)
            )
            notification = "{} {}.".format(
                _("Successfully accepted application"), str(application)
            )

            subject = _("Jäsenhakemuksesi Sähköinsinöörikiltaan on hyväksytty!")

            message = render_to_string(
                "members:email_application_accept.html",
                {"first_name": application.first_name},
            )
            send_email(member.email, subject, message, True)

            return HttpResponseRedirect(
                "/members/list?notification={}".format(html.escape(notification))
            )
        except Exception as ex:
            logging.exception("Exception while accepting application")
            return error_view(request, str(ex))
    else:
        logging.info(form)
        return error_view(request, form.errors)


@ensure_csrf_cookie
@require_http_methods(["POST"])
@login_required(login_url="/admin/login")
@permission_required("members.delete_request", raise_exception=True)
def application_delete(request, *args, **kwargs):
    """Delete member application."""
    try:
        id = request.POST["id"]
    except KeyError:
        return error_view(request, _("No application id specified"))

    try:
        application = Request.objects.get(id=id)
        notification = "{} {}.".format(
            _("Successfully deleted application"), str(application)
        )
        application.delete()
        logging.info(
            "Delete application in member register with the following id: {}".format(id)
        )
        return HttpResponseRedirect(
            "/members/applications?notification={}".format(html.escape(notification))
        )
    except:
        return error_view(request, _("Could not delete application object"))


@ensure_csrf_cookie
@require_http_methods(["GET"])
@login_required(login_url="/admin/login")
@permission_required("members.delete_request", raise_exception=True)
def application_delete_confirm(request, *args, **kwargs):
    """Confirm application deletion."""
    i = kwargs.pop("index", None)
    if i is None:
        return error_view(request, _("No application id specified"))
    else:
        application = Request.objects.get(id=i)
        form = ApplicationForm(instance=application)
        return render(
            request,
            "application_delete_confirm.html",
            {"application_id": i, "form": form},
        )


@ensure_csrf_cookie
def application_form(request, *args, **kwargs):
    """Render member application form."""
    form = ApplicationForm()
    return render(request, "application_index.html", {"form": form})


@ensure_csrf_cookie
@require_http_methods(["POST"])
def application_submit(request, *args, **kwargs):
    """Submit member application"""
    form = ApplicationForm(request.POST)
    if form.is_valid():
        form.save()
        try:
            application = form.instance
            email = form.cleaned_data.get("email", "")

            subject = _(
                "Jäsenhakemuksesi Sähköinsinöörikiltaan on lähetetty onnistuneesti!"
            )

            message = render_to_string(
                "members:email_application_submit.html",
                {
                    "application": application,
                    "ayy": _("Kyllä") if application.AYY else _("Ei"),
                    "jas": _("Kyllä") if application.jas else _("Ei"),
                },
            )
            send_email(email, subject, message)
        finally:
            return render(request, "application_success.html", {})
    else:
        return error_view(request, form.errors)