import logging
from typing import Any, Dict, Optional

from django.http import HttpRequest, HttpResponse, HttpResponseRedirect
from django.shortcuts import render
from django.urls import reverse

from corporate.lib.decorator import (
    authenticated_remote_realm_management_endpoint,
    authenticated_remote_server_management_endpoint,
)
from corporate.lib.stripe import (
    RealmBillingSession,
    RemoteRealmBillingSession,
    RemoteServerBillingSession,
    UpdatePlanRequest,
)
from corporate.models import CustomerPlan, get_customer_by_realm
from zerver.decorator import require_billing_access, zulip_login_required
from zerver.lib.request import REQ, has_request_variables
from zerver.lib.response import json_success
from zerver.lib.typed_endpoint import typed_endpoint
from zerver.lib.validator import check_int, check_int_in
from zerver.models import UserProfile
from zilencer.models import RemoteRealm, RemoteZulipServer

billing_logger = logging.getLogger("corporate.stripe")

ALLOWED_PLANS_API_STATUS_VALUES = [
    CustomerPlan.ACTIVE,
    CustomerPlan.DOWNGRADE_AT_END_OF_CYCLE,
    CustomerPlan.SWITCH_TO_ANNUAL_AT_END_OF_CYCLE,
    CustomerPlan.SWITCH_TO_MONTHLY_AT_END_OF_CYCLE,
    CustomerPlan.FREE_TRIAL,
    CustomerPlan.DOWNGRADE_AT_END_OF_FREE_TRIAL,
    CustomerPlan.ENDED,
]


@zulip_login_required
@typed_endpoint
def billing_page(
    request: HttpRequest,
    *,
    success_message: str = "",
) -> HttpResponse:
    user = request.user
    assert user.is_authenticated

    # BUG: This should pass the acting_user; this is just working
    # around that make_end_of_cycle_updates_if_needed doesn't do audit
    # logging not using the session user properly.
    billing_session = RealmBillingSession(user=None, realm=user.realm)

    context: Dict[str, Any] = {
        "admin_access": user.has_billing_access,
        "has_active_plan": False,
        "org_name": user.realm.name,
        "billing_base_url": "",
    }

    if not user.has_billing_access:
        return render(request, "corporate/billing.html", context=context)

    if user.realm.plan_type == user.realm.PLAN_TYPE_STANDARD_FREE:
        return HttpResponseRedirect(reverse("sponsorship_request"))

    customer = get_customer_by_realm(user.realm)
    if customer is not None and customer.sponsorship_pending:
        # Don't redirect to sponsorship page if the realm is on a paid plan
        if not billing_session.on_paid_plan():
            return HttpResponseRedirect(reverse("sponsorship_request"))
        # If the realm is on a paid plan, show the sponsorship pending message
        context["sponsorship_pending"] = True

    if user.realm.plan_type == user.realm.PLAN_TYPE_LIMITED:
        return HttpResponseRedirect(reverse("plans"))

    if customer is None:
        return HttpResponseRedirect(reverse("upgrade_page"))

    if not CustomerPlan.objects.filter(customer=customer).exists():
        return HttpResponseRedirect(reverse("upgrade_page"))

    main_context = billing_session.get_billing_page_context()
    if main_context:
        context.update(main_context)
        context["success_message"] = success_message

    return render(request, "corporate/billing.html", context=context)


@authenticated_remote_realm_management_endpoint
@typed_endpoint
def remote_realm_billing_page(
    request: HttpRequest,
    billing_session: RemoteRealmBillingSession,
    *,
    success_message: str = "",
) -> HttpResponse:  # nocoverage
    realm_uuid = billing_session.remote_realm.uuid
    context: Dict[str, Any] = {
        # We wouldn't be here if user didn't have access.
        "admin_access": billing_session.has_billing_access(),
        "has_active_plan": False,
        "org_name": billing_session.remote_realm.name,
        "billing_base_url": billing_session.billing_base_url,
    }

    if billing_session.remote_realm.plan_type == RemoteRealm.PLAN_TYPE_COMMUNITY:
        return HttpResponseRedirect(reverse("remote_realm_sponsorship_page", args=(realm_uuid,)))

    customer = billing_session.get_customer()
    if customer is not None and customer.sponsorship_pending:
        # Don't redirect to sponsorship page if the remote realm is on a paid plan
        if not billing_session.on_paid_plan():
            return HttpResponseRedirect(
                reverse("remote_realm_sponsorship_page", args=(realm_uuid,))
            )
        # If the realm is on a paid plan, show the sponsorship pending message
        context["sponsorship_pending"] = True

    if billing_session.remote_realm.plan_type == RemoteRealm.PLAN_TYPE_SELF_HOSTED:
        return HttpResponseRedirect(reverse("remote_realm_plans_page", args=(realm_uuid,)))

    if customer is None:
        return HttpResponseRedirect(reverse("remote_realm_upgrade_page", args=(realm_uuid,)))

    if not CustomerPlan.objects.filter(customer=customer).exists():
        return HttpResponseRedirect(reverse("remote_realm_upgrade_page", args=(realm_uuid,)))

    main_context = billing_session.get_billing_page_context()
    if main_context:
        context.update(main_context)
        context["success_message"] = success_message

    return render(request, "corporate/billing.html", context=context)


@authenticated_remote_server_management_endpoint
@typed_endpoint
def remote_server_billing_page(
    request: HttpRequest,
    billing_session: RemoteServerBillingSession,
    *,
    success_message: str = "",
) -> HttpResponse:  # nocoverage
    context: Dict[str, Any] = {
        # We wouldn't be here if user didn't have access.
        "admin_access": billing_session.has_billing_access(),
        "has_active_plan": False,
        "org_name": billing_session.remote_server.hostname,
        "billing_base_url": billing_session.billing_base_url,
    }

    if billing_session.remote_server.plan_type == RemoteZulipServer.PLAN_TYPE_COMMUNITY:
        return HttpResponseRedirect(
            reverse(
                "remote_server_sponsorship_page",
                kwargs={"server_uuid": billing_session.remote_server.uuid},
            )
        )

    customer = billing_session.get_customer()
    if customer is not None and customer.sponsorship_pending:
        # Don't redirect to sponsorship page if the remote realm is on a paid plan
        if not billing_session.on_paid_plan():
            return HttpResponseRedirect(
                reverse(
                    "remote_server_sponsorship_page",
                    kwargs={"server_uuid": billing_session.remote_server.uuid},
                )
            )
        # If the realm is on a paid plan, show the sponsorship pending message
        context["sponsorship_pending"] = True

    if (
        billing_session.remote_server.plan_type == RemoteZulipServer.PLAN_TYPE_SELF_HOSTED
        or customer is None
        or not CustomerPlan.objects.filter(customer=customer).exists()
    ):
        return HttpResponseRedirect(
            reverse(
                "remote_server_upgrade_page",
                kwargs={"server_uuid": billing_session.remote_server.uuid},
            )
        )

    main_context = billing_session.get_billing_page_context()
    if main_context:
        context.update(main_context)
        context["success_message"] = success_message

    return render(request, "corporate/billing.html", context=context)


@require_billing_access
@has_request_variables
def update_plan(
    request: HttpRequest,
    user: UserProfile,
    status: Optional[int] = REQ(
        "status",
        json_validator=check_int_in(ALLOWED_PLANS_API_STATUS_VALUES),
        default=None,
    ),
    licenses: Optional[int] = REQ("licenses", json_validator=check_int, default=None),
    licenses_at_next_renewal: Optional[int] = REQ(
        "licenses_at_next_renewal", json_validator=check_int, default=None
    ),
    schedule: Optional[int] = REQ("schedule", json_validator=check_int, default=None),
) -> HttpResponse:
    update_plan_request = UpdatePlanRequest(
        status=status,
        licenses=licenses,
        licenses_at_next_renewal=licenses_at_next_renewal,
        schedule=schedule,
    )
    billing_session = RealmBillingSession(user=user)
    billing_session.do_update_plan(update_plan_request)
    return json_success(request)


@has_request_variables
@authenticated_remote_realm_management_endpoint
def update_plan_for_remote_realm(
    request: HttpRequest,
    billing_session: RemoteRealmBillingSession,
    status: Optional[int] = REQ(
        "status",
        json_validator=check_int_in(ALLOWED_PLANS_API_STATUS_VALUES),
        default=None,
    ),
    licenses: Optional[int] = REQ("licenses", json_validator=check_int, default=None),
    licenses_at_next_renewal: Optional[int] = REQ(
        "licenses_at_next_renewal", json_validator=check_int, default=None
    ),
    schedule: Optional[int] = REQ("schedule", json_validator=check_int, default=None),
) -> HttpResponse:  # nocoverage
    update_plan_request = UpdatePlanRequest(
        status=status,
        licenses=licenses,
        licenses_at_next_renewal=licenses_at_next_renewal,
        schedule=schedule,
    )
    billing_session.do_update_plan(update_plan_request)
    return json_success(request)


@has_request_variables
@authenticated_remote_server_management_endpoint
def update_plan_for_remote_server(
    request: HttpRequest,
    billing_session: RemoteServerBillingSession,
    status: Optional[int] = REQ(
        "status",
        json_validator=check_int_in(ALLOWED_PLANS_API_STATUS_VALUES),
        default=None,
    ),
    licenses: Optional[int] = REQ("licenses", json_validator=check_int, default=None),
    licenses_at_next_renewal: Optional[int] = REQ(
        "licenses_at_next_renewal", json_validator=check_int, default=None
    ),
    schedule: Optional[int] = REQ("schedule", json_validator=check_int, default=None),
) -> HttpResponse:  # nocoverage
    update_plan_request = UpdatePlanRequest(
        status=status,
        licenses=licenses,
        licenses_at_next_renewal=licenses_at_next_renewal,
        schedule=schedule,
    )
    billing_session.do_update_plan(update_plan_request)
    return json_success(request)