/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*  Fluent Bit

 *  ==========

 *  Copyright (C) 2015-2026 The Fluent Bit Authors

 *

 *  Licensed under the Apache License, Version 2.0 (the "License");

 *  you may not use this file except in compliance with the License.

 *  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 *  Unless required by applicable law or agreed to in writing, software

 *  distributed under the License is distributed on an "AS IS" BASIS,

 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 *  See the License for the specific language governing permissions and

 *  limitations under the License.

 */

#include <fluent-bit/flb_info.h>

#include <fluent-bit/flb_pack.h>

#include <fluent-bit/flb_input.h>

#include <fluent-bit/flb_filter.h>

#include <fluent-bit/flb_output.h>

#include <fluent-bit/flb_sds.h>

#include <fluent-bit/flb_http_server.h>

#include <fluent-bit/http_server/flb_hs_utils.h>

#include <msgpack.h>

/* API: List all built-in plugins */

static int cb_plugins(struct flb_hs *hs,

                      struct flb_http_request *request,

                      struct flb_http_response *response)

{

    int len;

    flb_sds_t out_buf;

    msgpack_packer mp_pck;

    msgpack_sbuffer mp_sbuf;

    struct mk_list *head;

    struct flb_input_plugin *in;

    struct flb_filter_plugin *filter;

    struct flb_output_plugin *out;

    struct flb_config *config = hs->config;

    (void) request;

    /* initialize buffers */

    msgpack_sbuffer_init(&mp_sbuf);

    msgpack_packer_init(&mp_pck, &mp_sbuf, msgpack_sbuffer_write);

    msgpack_pack_map(&mp_pck, 1);

    msgpack_pack_str(&mp_pck, 7);

    msgpack_pack_str_body(&mp_pck, "plugins", 7);

    /*

     * plugins are: inputs, filters, outputs

     */

    msgpack_pack_map(&mp_pck, 3);

    /* Inputs */

    msgpack_pack_str(&mp_pck, 6);

    msgpack_pack_str_body(&mp_pck, "inputs", 6);

    len = mk_list_size(&config->in_plugins);

    msgpack_pack_array(&mp_pck, len);

    mk_list_foreach(head, &hs->config->in_plugins) {

        in = mk_list_entry(head, struct flb_input_plugin, _head);

        len = strlen(in->name);

        msgpack_pack_str(&mp_pck, len);

        msgpack_pack_str_body(&mp_pck, in->name, len);

    }

    /* Filters */

    msgpack_pack_str(&mp_pck, 7);

    msgpack_pack_str_body(&mp_pck, "filters", 7);

    len = mk_list_size(&config->filter_plugins);

    msgpack_pack_array(&mp_pck, len);

    mk_list_foreach(head, &config->filter_plugins) {

        filter = mk_list_entry(head, struct flb_filter_plugin, _head);

        len = strlen(filter->name);

        msgpack_pack_str(&mp_pck, len);

        msgpack_pack_str_body(&mp_pck, filter->name, len);

    }

    /* Outputs */

    msgpack_pack_str(&mp_pck, 7);

    msgpack_pack_str_body(&mp_pck, "outputs", 7);

    len = mk_list_size(&config->out_plugins);

    msgpack_pack_array(&mp_pck, len);

    mk_list_foreach(head, &config->out_plugins) {

        out = mk_list_entry(head, struct flb_output_plugin, _head);

        len = strlen(out->name);

        msgpack_pack_str(&mp_pck, len);

        msgpack_pack_str_body(&mp_pck, out->name, len);

    }

    /* Export to JSON */

    out_buf = flb_msgpack_raw_to_json_sds(mp_sbuf.data, mp_sbuf.size, FLB_TRUE);

    msgpack_sbuffer_destroy(&mp_sbuf);

    flb_hs_response_set_payload(response,

                                200,

                                FLB_HS_CONTENT_TYPE_JSON,

                                out_buf,

                                flb_sds_len(out_buf));

    flb_sds_destroy(out_buf);

    return 0;

}

/* Perform registration */

int api_v1_plugins(struct flb_hs *hs)

{

    return flb_hs_register_endpoint(hs, "/api/v1/plugins",

                                    FLB_HS_ROUTE_EXACT, cb_plugins);

}