/*
     This file is part of GNUnet.
     Copyright (C) 2012 GNUnet e.V.

     GNUnet 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.

     GNUnet 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
     Affero General Public License for more details.

     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */

/**
 * @file set/test_setu_api.c
 * @brief testcase for setu_api.c
 * @author Florian Dold
 */
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_testing_lib.h"
#include "gnunet_setu_service.h"
#include <sys/sysinfo.h>
#include <pthread.h>


static struct GNUNET_PeerIdentity local_id;

static struct GNUNET_HashCode app_id;

static struct GNUNET_SETU_Handle *set1;

static struct GNUNET_SETU_Handle *set2;

static struct GNUNET_SETU_ListenHandle *listen_handle;

static struct GNUNET_SETU_OperationHandle *oh1;

static struct GNUNET_SETU_OperationHandle *oh2;

static const struct GNUNET_CONFIGURATION_Handle *config;

static int ret;

static struct GNUNET_SCHEDULER_Task *tt;


/**
 * Handles configuration file for setu performance test
 *
 */
static const struct GNUNET_CONFIGURATION_Handle *setu_cfg;



static void
result_cb_set1 (void *cls,
                const struct GNUNET_SETU_Element *element,
                uint64_t size,
                enum GNUNET_SETU_Status status)
{
    switch (status)
    {
        case GNUNET_SETU_STATUS_ADD_LOCAL:
            GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "set 1: got element\n");
            break;

        case GNUNET_SETU_STATUS_FAILURE:
            GNUNET_break (0);
            oh1 = NULL;
            fprintf (stderr, "set 1: received failure status!\n");
            ret = 1;
            if (NULL != tt)
            {
                GNUNET_SCHEDULER_cancel (tt);
                tt = NULL;
            }
            GNUNET_SCHEDULER_shutdown ();
            break;

        case GNUNET_SETU_STATUS_DONE:
            GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "set 1: done\n");
            oh1 = NULL;
            if (NULL != set1)
            {
                GNUNET_SETU_destroy (set1);
                set1 = NULL;
            }
            if (NULL == set2)
            {
                GNUNET_SCHEDULER_cancel (tt);
                tt = NULL;
                GNUNET_SCHEDULER_shutdown ();
            }
            break;

        default:
            GNUNET_assert (0);
    }
}


static void
result_cb_set2 (void *cls,
                const struct GNUNET_SETU_Element *element,
                uint64_t size,
                enum GNUNET_SETU_Status status)
{
    switch (status)
    {
        case GNUNET_SETU_STATUS_ADD_LOCAL:
            GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "set 2: got element\n");
            break;

        case GNUNET_SETU_STATUS_FAILURE:
            GNUNET_break (0);
            oh2 = NULL;
            fprintf (stderr, "set 2: received failure status\n");
            GNUNET_SCHEDULER_shutdown ();
            ret = 1;
            break;

        case GNUNET_SETU_STATUS_DONE:
            oh2 = NULL;
            GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "set 2: done\n");
            GNUNET_SETU_destroy (set2);
            set2 = NULL;
            if (NULL == set1)
            {
                GNUNET_SCHEDULER_cancel (tt);
                tt = NULL;
                GNUNET_SCHEDULER_shutdown ();
            }
            break;

        default:
            GNUNET_assert (0);
    }
}


static void
listen_cb (void *cls,
           const struct GNUNET_PeerIdentity *other_peer,
           const struct GNUNET_MessageHeader *context_msg,
           struct GNUNET_SETU_Request *request)
{
    GNUNET_assert (NULL != context_msg);
    GNUNET_assert (ntohs (context_msg->type) == GNUNET_MESSAGE_TYPE_DUMMY);
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "listen cb called\n");
    oh2 = GNUNET_SETU_accept (request,
                              (struct GNUNET_SETU_Option[]){ 0 },
                              &result_cb_set2,
                              NULL);
    GNUNET_SETU_commit (oh2, set2);
}


/**
 * Start the set operation.
 *
 * @param cls closure, unused
 */
static void
start (void *cls)
{
    struct GNUNET_MessageHeader context_msg;

    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting reconciliation\n");
    context_msg.size = htons (sizeof context_msg);
    context_msg.type = htons (GNUNET_MESSAGE_TYPE_DUMMY);
    listen_handle = GNUNET_SETU_listen (config,
                                        &app_id,
                                        &listen_cb,
                                        NULL);
    oh1 = GNUNET_SETU_prepare (&local_id,
                               &app_id,
                               &context_msg,
                               (struct GNUNET_SETU_Option[]){ 0 },
                               &result_cb_set1,
                               NULL);
    GNUNET_SETU_commit (oh1, set1);
}


/**
 * Initialize the second set, continue
 *
 * @param cls closure, unused
 */
static void
init_set2 (void *cls)
{
    struct GNUNET_SETU_Element element;

    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "initializing set 2\n");

    element.element_type = 0;
    element.data = "hello1";
    element.size = strlen (element.data);
    GNUNET_SETU_add_element (set2, &element, NULL, NULL);
    element.data = "quux";
    element.size = strlen (element.data);
    GNUNET_SETU_add_element (set2, &element, NULL, NULL);
    element.data = "baz";
    element.size = strlen (element.data);
    GNUNET_SETU_add_element (set2, &element, &start, NULL);
}

/**
 * Generate random byte stream
 */

unsigned char *gen_rdm_bytestream (size_t num_bytes)
{
    unsigned char *stream = GNUNET_malloc (num_bytes);
    GNUNET_CRYPTO_random_block(GNUNET_CRYPTO_QUALITY_WEAK, stream, num_bytes);
    return stream;
}

/**
 * Generate random sets
 */

static void
initRandomSets(int overlap, int set1_size, int set2_size, int element_size_in_bytes)
{
    struct GNUNET_SETU_Element element;
    element.element_type = 0;

    // Add elements to both sets
    for (int i = 0; i < overlap; i++) {
        element.data = gen_rdm_bytestream(element_size_in_bytes);
        element.size = element_size_in_bytes;
        GNUNET_SETU_add_element (set1, &element, NULL, NULL);
        GNUNET_SETU_add_element (set2, &element, NULL, NULL);
        set1_size--;
        set2_size--;
    }
    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "initialized elements in both sets\n");

    // Add other elements to set 1
    while(set1_size>0) {
        element.data = gen_rdm_bytestream(element_size_in_bytes);
        element.size = element_size_in_bytes;
        GNUNET_SETU_add_element (set1, &element, NULL, NULL);
        set1_size--;
    }
    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "initialized elements in set1\n");

    // Add other elements to set 2
    while(set2_size > 0) {
        element.data = gen_rdm_bytestream(element_size_in_bytes);
        element.size = element_size_in_bytes;

        if(set2_size != 1) {
            GNUNET_SETU_add_element (set2, &element,NULL, NULL);
        } else {
            GNUNET_SETU_add_element (set2, &element,&start, NULL);
        }

        set2_size--;
    }
    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "initialized elements in set2\n");
}

/**
 * Initialize the first set, continue.
 */
static void
init_set1 (void)
{
    struct GNUNET_SETU_Element element;

    element.element_type = 0;
    element.data = "hello";
    element.size = strlen (element.data);
    GNUNET_SETU_add_element (set1, &element, NULL, NULL);
    element.data = "bar";
    element.size = strlen (element.data);
    GNUNET_SETU_add_element (set1, &element, &init_set2, NULL);
    GNUNET_log (GNUNET_ERROR_TYPE_INFO, "initialized set 1\n");
}


/**
 * Function run on timeout.
 *
 * @param cls closure
 */
static void
timeout_fail (void *cls)
{
    tt = NULL;
    GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE, "Testcase failed with timeout\n");
    GNUNET_SCHEDULER_shutdown ();
    ret = 1;
}


/**
 * Function run on shutdown.
 *
 * @param cls closure
 */
static void
do_shutdown (void *cls)
{
    if (NULL != tt)
    {
        GNUNET_SCHEDULER_cancel (tt);
        tt = NULL;
    }
    if (NULL != oh1)
    {
        GNUNET_SETU_operation_cancel (oh1);
        oh1 = NULL;
    }
    if (NULL != oh2)
    {
        GNUNET_SETU_operation_cancel (oh2);
        oh2 = NULL;
    }
    if (NULL != set1)
    {
        GNUNET_SETU_destroy (set1);
        set1 = NULL;
    }
    if (NULL != set2)
    {
        GNUNET_SETU_destroy (set2);
        set2 = NULL;
    }
    if (NULL != listen_handle)
    {
        GNUNET_SETU_listen_cancel (listen_handle);
        listen_handle = NULL;
    }
}


/**
 * Signature of the 'main' function for a (single-peer) testcase that
 * is run using 'GNUNET_TESTING_peer_run'.
 *
 * @param cls closure
 * @param cfg configuration of the peer that was started
 * @param peer identity of the peer that was created
 */
static void
run (void *cls,
     const struct GNUNET_CONFIGURATION_Handle *cfg,
     struct GNUNET_TESTING_Peer *peer)
{
    struct GNUNET_SETU_OperationHandle *my_oh;

    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Running preparatory tests\n");
    tt = GNUNET_SCHEDULER_add_delayed (
            GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5),
            &timeout_fail,
            NULL);
    GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);

    config = cfg;
    GNUNET_assert (GNUNET_OK == GNUNET_CRYPTO_get_peer_identity (cfg,
                                                                 &local_id));
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "my id (from CRYPTO): %s\n",
                GNUNET_i2s (&local_id));
    GNUNET_TESTING_peer_get_identity (peer,
                                      &local_id);
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "my id (from TESTING): %s\n",
                GNUNET_i2s (&local_id));
    set1 = GNUNET_SETU_create (cfg);
    set2 = GNUNET_SETU_create (cfg);
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Created sets %p and %p for union operation\n",
                set1,
                set2);
    GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_WEAK, &app_id);

    /* test if canceling an uncommited request works! */
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Launching and instantly stopping set operation\n");
    my_oh = GNUNET_SETU_prepare (&local_id,
                                 &app_id,
                                 NULL,
                                 (struct GNUNET_SETU_Option[]){ 0 },
                                 NULL,
                                 NULL);
    GNUNET_SETU_operation_cancel (my_oh);

    /* test the real set reconciliation */
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Running real set-reconciliation\n");
    //init_set1 ();
    // limit ~23800 element total
    initRandomSets(440,500,500,32);
}

void perf_thread() {
    GNUNET_TESTING_service_run("perf_setu_api",
                               "arm",
                               "test_setu.conf",
                               &run,
                               NULL);

}


static void run_petf_thread(int total_runs) {
    int core_count = get_nprocs_conf();
    pid_t child_pid, wpid;
    int status = 0;

//Father code (before child processes start)
    for (int processed = 0; processed < total_runs;) {
        for (int id = 0; id < core_count; id++) {
            if(processed >= total_runs) break;

            if ((child_pid = fork()) == 0) {
                perf_thread();
                exit(0);
            }
            processed += 1;
        }
        while ((wpid = wait(&status)) > 0);
    }
}

static void execute_perf() {

    /**
    * Erase statfile
    */
    remove("perf_stats.csv");
    remove("perf_failure_bucket_number_factor.csv");
    //FILE *out = fopen("perfstats.log", "w");
    //fprintf(out, "se_diff,active_passive_switches,bytes_transmitted,rtt\n");

    for (int out_out_ctr = 4; out_out_ctr <= 4; out_out_ctr++) {

        for (int out_ctr = 40; out_ctr <= 40; out_ctr++) {

            float base = 0.1;
            float x = out_ctr * base;
            char factor[10];
            gcvt(x, 4, factor);

            setu_cfg = GNUNET_CONFIGURATION_create();
            GNUNET_CONFIGURATION_set_value_string(setu_cfg, "IBF", "BUCKET_NUMBER_FACTOR", factor); // Factor default=4
            GNUNET_CONFIGURATION_set_value_number(setu_cfg, "IBF", "NUMBER_PER_BUCKET", out_out_ctr); // K default=4
            GNUNET_CONFIGURATION_set_value_string(setu_cfg, "PERFORMANCE", "TRADEOFF", "0.25");
            GNUNET_CONFIGURATION_set_value_string(setu_cfg, "PERFORMANCE", "MAX_SET_DIFF_FACTOR_DIFFERENTIAL",
                                                  "0.25");//default=0.25


            if (GNUNET_OK != GNUNET_CONFIGURATION_write(setu_cfg, "/tmp/perf_setu.conf"))
                GNUNET_log(
                        GNUNET_ERROR_TYPE_ERROR,
                        _("Failed to write subsystem default identifier map to `%s'.\n"),
                        setu_cfg);
            run_petf_thread(10000);
        }
    }
    return 0;
}



int
main (int argc, char **argv)
{

    GNUNET_log_setup ("perf_setu_api",
                      "WARNING",
                      NULL);
    execute_perf();
    return 0;
}