/*

 * Copyright (C) 2022-2023 by Sukchan Lee <acetcom@gmail.com>

 *

 * This file is part of Open5GS.

 *

 * 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>.

 */

#include "ogs-sbi.h"

bool ogs_nnrf_nfm_send_nf_register(ogs_sbi_nf_instance_t *nf_instance)

{

    bool rc;

    ogs_sbi_request_t *request = NULL;

    ogs_assert(nf_instance);

    request = ogs_nnrf_nfm_build_register();

    if (!request) {

        ogs_error("No Request");

        return false;

    }

    rc = ogs_sbi_send_request_to_nrf(

            OpenAPI_service_name_nnrf_nfm, NULL,

            ogs_sbi_client_handler, request, nf_instance);

    ogs_expect(rc == true);

    ogs_sbi_request_free(request);

    return rc;

}

bool ogs_nnrf_nfm_send_nf_update(ogs_sbi_nf_instance_t *nf_instance)

{

    bool rc;

    ogs_sbi_request_t *request = NULL;

    ogs_assert(nf_instance);

    request = ogs_nnrf_nfm_build_update();

    if (!request) {

        ogs_error("No Request");

        return false;

    }

    rc = ogs_sbi_send_request_to_nrf(

            OpenAPI_service_name_nnrf_nfm, NULL,

            ogs_sbi_client_handler, request, nf_instance);

    ogs_expect(rc == true);

    ogs_sbi_request_free(request);

    return rc;

}

bool ogs_nnrf_nfm_send_nf_de_register(ogs_sbi_nf_instance_t *nf_instance)

{

    bool rc;

    ogs_sbi_request_t *request = NULL;

    ogs_assert(nf_instance);

    request = ogs_nnrf_nfm_build_de_register();

    if (!request) {

        ogs_error("No Request");

        return false;

    }

    rc = ogs_sbi_send_request_to_nrf(

            OpenAPI_service_name_nnrf_nfm, NULL,

            ogs_sbi_client_handler, request, nf_instance);

    ogs_expect(rc == true);

    ogs_sbi_request_free(request);

    return rc;

}

bool ogs_nnrf_nfm_send_nf_status_subscribe(

        OpenAPI_nf_type_e req_nf_type, char *req_nf_instance_id,

        OpenAPI_nf_type_e subscr_cond_nf_type,

        OpenAPI_service_name_e subscr_cond_service_name)

{

    bool rc;

    ogs_sbi_request_t *request = NULL;

    ogs_sbi_subscription_data_t *subscription_data = NULL;

    /* Issue #2630 : The format of subscrCond is invalid. Must be 'oneOf'. */

    ogs_assert(!subscr_cond_nf_type || !subscr_cond_service_name);

    subscription_data = ogs_sbi_subscription_data_add();

    if (!subscription_data) {

        ogs_error("ogs_sbi_subscription_data_add() failed");

        return false;

    }

    subscription_data->req_nf_type = req_nf_type;

    if (req_nf_instance_id) {

        subscription_data->req_nf_instance_id = ogs_strdup(req_nf_instance_id);

        ogs_assert(subscription_data->req_nf_instance_id);

    }

    if (subscr_cond_nf_type)

        subscription_data->subscr_cond.nf_type = subscr_cond_nf_type;

    else if (subscr_cond_service_name)

        subscription_data->subscr_cond.service_name = subscr_cond_service_name;

    else {

        ogs_fatal("SubscrCond must be 'oneOf'.");

        ogs_assert_if_reached();

    }

    request = ogs_nnrf_nfm_build_status_subscribe(subscription_data);

    if (!request) {

        ogs_error("No Request");

        ogs_sbi_subscription_data_remove(subscription_data);

        return false;

    }

    rc = ogs_sbi_send_request_to_nrf(

            OpenAPI_service_name_nnrf_nfm, NULL,

            ogs_sbi_client_handler, request, subscription_data);

    ogs_expect(rc == true);

    ogs_sbi_request_free(request);

    if (rc != true)

        ogs_sbi_subscription_data_remove(subscription_data);

    return rc;

}

bool ogs_nnrf_nfm_send_nf_status_subscribe_renew(

        ogs_sbi_subscription_data_t *subscription_data)

{

    char *req_nf_instance_id = NULL;

    OpenAPI_service_name_e subscr_cond_service_name = OpenAPI_service_name_NULL;

    OpenAPI_nf_type_e req_nf_type;

    OpenAPI_nf_type_e subscr_cond_nf_type;

    bool rc;

    ogs_assert(subscription_data);

    /*

     * The old subscription still occupies subscription_data_pool here.

     * Keep local copies of the fields needed to rebuild the request,

     * remove the old subscription first so the pool has a free slot,

     * then resubscribe.  Without this, a full pool would make renewal

     * fail forever even though the renewal itself does not change the

     * net occupancy.

     */

    req_nf_type         = subscription_data->req_nf_type;

    subscr_cond_nf_type = subscription_data->subscr_cond.nf_type;

    if (subscription_data->req_nf_instance_id) {

        req_nf_instance_id =

            ogs_strdup(subscription_data->req_nf_instance_id);

        ogs_assert(req_nf_instance_id);

    }

    if (subscription_data->subscr_cond.service_name)

        subscr_cond_service_name = subscription_data->subscr_cond.service_name;

    ogs_sbi_subscription_data_remove(subscription_data);

    /* subscription_data is invalid past this point */

    rc = ogs_nnrf_nfm_send_nf_status_subscribe(

            req_nf_type, req_nf_instance_id,

            subscr_cond_nf_type, subscr_cond_service_name);

    if (rc != true)

        ogs_error("NF status subscription renewal failed");

    ogs_free(req_nf_instance_id);

    return rc;

}

bool ogs_nnrf_nfm_send_nf_status_update(

        ogs_sbi_subscription_data_t *subscription_data)

{

    bool rc;

    ogs_sbi_request_t *request = NULL;

    ogs_assert(subscription_data);

    request = ogs_nnrf_nfm_build_status_update(subscription_data);

    if (!request) {

        ogs_error("No Request");

        return false;

    }

    rc = ogs_sbi_send_request_to_nrf(

            OpenAPI_service_name_nnrf_nfm, NULL,

            ogs_sbi_client_handler, request, subscription_data);

    ogs_expect(rc == true);

    ogs_sbi_request_free(request);

    return rc;

}

bool ogs_nnrf_nfm_send_nf_status_unsubscribe(

        ogs_sbi_subscription_data_t *subscription_data)

{

    bool rc;

    ogs_sbi_request_t *request = NULL;

    ogs_assert(subscription_data);

    request = ogs_nnrf_nfm_build_status_unsubscribe(subscription_data);

    if (!request) {

        ogs_error("No Request");

        return false;

    }

    rc = ogs_sbi_send_request_to_nrf(

            OpenAPI_service_name_nnrf_nfm, NULL,

            ogs_sbi_client_handler, request, subscription_data);

    ogs_expect(rc == true);

    ogs_sbi_request_free(request);

    return rc;

}

bool ogs_nnrf_nfm_send_nf_list_retrieve(void)

{

    bool rc;

    ogs_sbi_request_t *request = NULL;

    request = ogs_nnrf_nfm_build_nflist_retrieve();

    if (!request) {

        ogs_error("No Request");

        return false;

    }

    rc = ogs_sbi_send_request_to_nrf(

            OpenAPI_service_name_nnrf_nfm, NULL,

            ogs_sbi_client_handler, request, ogs_sbi_self()->nf_instance);

    ogs_expect(rc == true);

    ogs_sbi_request_free(request);

    return rc;

}

bool ogs_nnrf_nfm_send_nf_profile_get(char *nf_instance_id)

{

    bool rc;

    ogs_sbi_request_t *request = NULL;

    request = ogs_nnrf_nfm_build_profile_retrieve(nf_instance_id);

    if (!request) {

        ogs_error("No Request");

        return false;

    }

    rc = ogs_sbi_send_request_to_nrf(

            OpenAPI_service_name_nnrf_nfm, NULL,

            ogs_sbi_client_handler, request, ogs_sbi_self()->nf_instance);

    ogs_expect(rc == true);

    ogs_sbi_request_free(request);

    return rc;

}