/*
  This file is part of TALER
  Copyright (C) 2014-2024 Taler Systems SA

  TALER 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, or (at your option) any later version.

  TALER 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
  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
*/
/**
 * @file taler-auditor-httpd_deposit-confirmation-get.c
 * @brief Handle /deposit-confirmation requests; return list of deposit confirmations from merchant
 * that were not received from the exchange, by auditor.
 * @author Nic Eigel
 */
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_json_lib.h>
#include <jansson.h>
#include <microhttpd.h>
#include <pthread.h>
#include "taler_json_lib.h"
#include "taler_mhd_lib.h"
#include "taler-auditor-httpd.h"
#include "taler-auditor-httpd_deposit-confirmation-get.h"


/**
 * Add deposit confirmation to the list.
 *
 * @param[in,out] cls a `json_t *` array to extend
 * @param dc struct of deposit confirmation
 * @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop iterating
 */
static enum GNUNET_GenericReturnValue
add_deposit_confirmation (
  void *cls,
  const struct TALER_AUDITORDB_DepositConfirmation *dc)
{
  json_t *list = cls;
  json_t *obj;
  json_t *coin_pubs_json = json_array ();
  json_t *coin_sigs_json = json_array ();

  GNUNET_assert (NULL != coin_pubs_json);
  GNUNET_assert (NULL != coin_sigs_json);
  for (unsigned int i = 0; i < dc->num_coins; i++)
  {
    json_t *pub;
    json_t *sig;

    pub = GNUNET_JSON_PACK (
      GNUNET_JSON_pack_data_auto (NULL,
                                  &dc->coin_pubs[i]));
    GNUNET_assert (0 ==
                   json_array_append_new (coin_pubs_json,
                                          pub));
    sig = GNUNET_JSON_PACK (
      GNUNET_JSON_pack_data_auto (NULL,
                                  &dc->coin_sigs[i]));
    GNUNET_assert (0 ==
                   json_array_append_new (coin_sigs_json,
                                          sig));
  }

  obj = GNUNET_JSON_PACK (
    GNUNET_JSON_pack_int64 ("deposit_confirmation_serial_id",
                            dc->row_id),
    GNUNET_JSON_pack_data_auto ("h_contract_terms",
                                &dc->h_contract_terms),
    GNUNET_JSON_pack_data_auto ("h_policy",
                                &dc->h_policy),
    GNUNET_JSON_pack_data_auto ("h_wire",
                                &dc->h_wire),
    GNUNET_JSON_pack_timestamp ("exchange_timestamp",
                                dc->exchange_timestamp),
    GNUNET_JSON_pack_timestamp ("refund_deadline",
                                dc->refund_deadline),
    GNUNET_JSON_pack_timestamp ("wire_deadline",
                                dc->wire_deadline),
    TALER_JSON_pack_amount ("total_without_fee",
                            &dc->total_without_fee),
    GNUNET_JSON_pack_array_steal ("coin_pubs",
                                  coin_pubs_json),
    GNUNET_JSON_pack_array_steal ("coin_sigs",
                                  coin_sigs_json),
    GNUNET_JSON_pack_data_auto ("merchant_pub",
                                &dc->merchant),
    GNUNET_JSON_pack_data_auto ("exchange_sig",
                                &dc->exchange_sig),
    GNUNET_JSON_pack_data_auto ("exchange_pub",
                                &dc->exchange_pub),
    GNUNET_JSON_pack_data_auto ("master_sig",
                                &dc->master_sig),
    GNUNET_JSON_pack_bool ("suppressed",
                           dc->suppressed)
    );
  GNUNET_break (0 ==
                json_array_append_new (list,
                                       obj));
  return GNUNET_OK;
}


MHD_RESULT
TAH_DEPOSIT_CONFIRMATION_handler_get (
  struct TAH_RequestHandler *rh,
  struct MHD_Connection *connection,
  void **connection_cls,
  const char *upload_data,
  size_t *upload_data_size,
  const char *const args[])
{
  json_t *ja;
  enum GNUNET_DB_QueryStatus qs;
  bool return_suppressed = false;
  int64_t limit = -20;
  uint64_t offset;

  (void) rh;
  (void) connection_cls;
  (void) upload_data;
  (void) upload_data_size;
  if (GNUNET_SYSERR ==
      TAH_plugin->preflight (TAH_plugin->cls))
  {
    GNUNET_break (0);
    return TALER_MHD_reply_with_error (connection,
                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
                                       TALER_EC_GENERIC_DB_SETUP_FAILED,
                                       NULL);
  }
  TALER_MHD_parse_request_snumber (connection,
                                   "limit",
                                   &limit);
  if (limit < 0)
    offset = INT64_MAX;
  else
    offset = 0;
  TALER_MHD_parse_request_number (connection,
                                  "offset",
                                  &offset);
  {
    const char *ret_s = MHD_lookup_connection_value (connection,
                                                     MHD_GET_ARGUMENT_KIND,
                                                     "return_suppressed");
    if ( (NULL != ret_s) &&
         (0 == strcmp (ret_s, "true")) )
    {
      return_suppressed = true;
    }
  }

  ja = json_array ();
  GNUNET_break (NULL != ja);
  qs = TAH_plugin->get_deposit_confirmations (
    TAH_plugin->cls,
    limit,
    offset,
    return_suppressed,
    &add_deposit_confirmation,
    ja);
  if (0 > qs)
  {
    GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR == qs);
    json_decref (ja);
    TALER_LOG_WARNING (
      "Failed to handle GET /deposit-confirmation in database\n");
    return TALER_MHD_reply_with_error (connection,
                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
                                       TALER_EC_GENERIC_DB_FETCH_FAILED,
                                       "deposit-confirmation");
  }
  return TALER_MHD_REPLY_JSON_PACK (
    connection,
    MHD_HTTP_OK,
    GNUNET_JSON_pack_array_steal ("deposit_confirmation",
                                  ja));
}


/* end of taler-auditor-httpd_deposit-confirmation-get.c */