"""Views for the membership app."""

from __future__ import annotations

from typing import TYPE_CHECKING

from django.contrib import messages
from django.contrib.auth.tokens import default_token_generator
from django.http import HttpResponseForbidden
from django.shortcuts import get_object_or_404
from django.shortcuts import redirect
from django.utils.translation import gettext_lazy as _
from django_ratelimit.decorators import ratelimit
from django_view_decorator import namespaced_decorator_factory
from utils.view_utils import RenderConfig
from utils.view_utils import RowAction
from utils.view_utils import render

from .forms import InviteForm
from .forms import MemberApplicationForm
from .models import Membership
from .permissions import ADMINISTRATE_MEMBERS
from .selectors import get_member
from .selectors import get_members
from .selectors import get_memberships
from .selectors import get_subscription_periods

if TYPE_CHECKING:
    from django.http import HttpRequest
    from django.http import HttpResponse
    from utils.types import AuthenticatedHttpRequest

member_view = namespaced_decorator_factory(namespace="member", base_path="membership")


@member_view(
    paths="",
    name="membership-overview",
    login_required=True,
)
def membership_overview(request: AuthenticatedHttpRequest) -> HttpResponse:
    """View to show the membership overview."""
    memberships = get_memberships(member=request.user)
    current_membership = memberships.current()
    previous_memberships = memberships.previous()

    current_period = current_membership.period.period if current_membership else None

    context = {
        "current_membership": current_membership,
        "current_period": current_period,
        "previous_memberships": previous_memberships,
    }

    return render(
        request=request,
        template_name="membership/membership_overview.html",
        context=context,
    )


admin_members_view = namespaced_decorator_factory(
    namespace="admin-members",
    base_path="admin",
)


@admin_members_view(
    paths="members/",
    name="list",
    login_required=True,
    permissions=[ADMINISTRATE_MEMBERS.path],
)
def members_admin(request: AuthenticatedHttpRequest) -> HttpResponse:
    """View to list all members."""
    users = get_members()

    render_config = RenderConfig(
        entity_name="member",
        entity_name_plural="members",
        paginate_by=20,
        objects=users,
        columns=[
            ("username", _("Username")),
            ("first_name", _("First name")),
            ("last_name", _("Last name")),
            ("email", _("Email")),
            ("active_membership", _("Active membership")),
        ],
        row_actions=[
            RowAction(
                label=_("View"),
                url_name="admin-members:detail",
                url_kwargs={"member_id": "id"},
            ),
        ],
    )

    return render_config.render_list(
        request=request,
    )


@admin_members_view(
    paths="<int:member_id>/",
    name="detail",
    login_required=True,
    permissions=[ADMINISTRATE_MEMBERS.path],
)
def members_admin_detail(request: AuthenticatedHttpRequest, member_id: int) -> HttpResponse:
    """View to show the details of a member."""
    member = get_member(member_id=member_id)
    subscription_periods = get_subscription_periods(member=member)

    context = {
        "member": member,
        "subscription_periods": subscription_periods,
        "base_path": "admin-members:list",
    }

    return render(
        request=request,
        template_name="membership/members_admin_detail.html",
        context=context,
    )


@ratelimit(group="membership", key="ip", rate="10/d", method="ALL", block=True)
@member_view(
    paths="invite/<str:referral_code>/<str:token>/",
    name="membership-invite",
    login_required=False,
)
def invite(request: HttpRequest, referral_code: str, token: str) -> HttpResponse:
    """View to invite a member to create a membership.

    The token belongs to a non-active Member object. If the token is valid,
    the caller is allowed to create a membership.

    We ratelimit this view so it's not possible to brute-force tokens.
    """
    if request.user.is_authenticated:
        return HttpResponseForbidden("You're already logged in. So you cannot receive an invite.")

    # Firstly, we get the membership by the referral code.
    membership = get_object_or_404(Membership, referral_code=referral_code, user__is_active=False, revoked=False)

    token_valid = default_token_generator.check_token(membership.user, token)

    if not token_valid:
        return HttpResponseForbidden("Token not valid - maybe it expired?")

    if request.method == "POST":
        form = InviteForm(membership=membership, data=request.POST)
        if form.is_valid():
            form.save()
            messages.info(request, _("Password is set for your account and you can now login."))
            return redirect("account_login")
    else:
        form = InviteForm(membership=membership)

    context = {
        "token": token,
        "membership": membership,
        "form": form,
    }
    return render(
        request=request,
        template_name="membership/invite.html",
        context=context,
    )


@member_view(
    paths="apply/",
    name="apply",
    login_required=False,
)
def apply_for_membership(request: HttpRequest) -> HttpResponse:
    """View for applying for membership."""
    if request.method == "POST":
        form = MemberApplicationForm(request.POST)
        if form.is_valid():
            form.save()
            messages.success(
                request,
                _("Thank you for your application! We will review it and get back to you soon."),
            )
            return redirect("index")
    else:
        form = MemberApplicationForm()

    return render(
        request,
        "membership/apply.html",
        {"form": form},
    )