//
// Created by parallels on 27/03/24.
//


#include "platform.h"
#include "taler_error_codes.h"
#include "taler_dbevents.h"
#include "taler_pq_lib.h"
#include "pg_helper.h"


#include "pg_get_reserve_balance_insufficient_inconsistency.h"

/**
 * Closure for #reserve_balance_insufficient_inconsistency_cb().
 */
struct ReserveBalanceInsufficientInconsistencyContext
{

  /**
   * Function to call for each ReserveBalanceInsufficientInconsistency.
   */
  TALER_AUDITORDB_ReserveBalanceInsufficientInconsistencyCallback cb;

  /**
   * Closure for @e cb
   */
  void *cb_cls;

  /**
   * Plugin context.
   */
  struct PostgresClosure *pg;

  /**
   * Query status to return.
   */
  enum GNUNET_DB_QueryStatus qs;
};


/**
 * Helper function for #TAH_PG_reserve_balance_insufficient_inconsistency().
 * To be called with the results of a SELECT statement
 * that has returned @a num_results results.
 *
 * @param cls closure of type `struct ReserveBalanceInsufficientInconsistency *`
 * @param result the postgres result
 * @param num_results the number of results in @a result
 */
static void
reserve_balance_insufficient_inconsistency_cb (void *cls,
                                               PGresult *result,
                                               unsigned int num_results)
{
  struct ReserveBalanceInsufficientInconsistencyContext *dcc = cls;
  struct PostgresClosure *pg = dcc->pg;

  for (unsigned int i = 0; i < num_results; i++)
  {
    uint64_t serial_id;

    struct TALER_AUDITORDB_ReserveBalanceInsufficientInconsistency dc;

    struct GNUNET_PQ_ResultSpec rs[] = {

      GNUNET_PQ_result_spec_uint64 ("row_id", &serial_id),
      GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",  &dc.reserve_pub),
      GNUNET_PQ_result_spec_bool ("inconsistency_gain", &dc.inconsistency_gain),
      TALER_PQ_RESULT_SPEC_AMOUNT ("inconsistency_amount",
                                   &dc.inconsistency_amount),

      GNUNET_PQ_result_spec_end
    };
    enum GNUNET_GenericReturnValue rval;

    if (GNUNET_OK !=
        GNUNET_PQ_extract_result (result,
                                  rs,
                                  i))
    {
      GNUNET_break (0);
      dcc->qs = GNUNET_DB_STATUS_HARD_ERROR;
      return;
    }

    dcc->qs = i + 1;

    rval = dcc->cb (dcc->cb_cls,
                    serial_id,
                    &dc);
    GNUNET_PQ_cleanup_result (rs);
    if (GNUNET_OK != rval)
      break;
  }
}


enum GNUNET_DB_QueryStatus
TAH_PG_get_reserve_balance_insufficient_inconsistency (
  void *cls,
  uint64_t start_id,
  bool return_suppressed,             // maybe not needed
  TALER_AUDITORDB_ReserveBalanceInsufficientInconsistencyCallback cb,
  void *cb_cls)
{

  struct PostgresClosure *pg = cls;
  struct GNUNET_PQ_QueryParam params[] = {
    GNUNET_PQ_query_param_uint64 (&start_id),
    // GNUNET_PQ_query_param_bool (return_suppressed),
    GNUNET_PQ_query_param_end
  };
  struct ReserveBalanceInsufficientInconsistencyContext dcc = {
    .cb = cb,
    .cb_cls = cb_cls,
    .pg = pg
  };
  enum GNUNET_DB_QueryStatus qs;

  PREPARE (pg,
           "auditor_reserve_balance_insufficient_inconsistency_get",
           "SELECT"
           " row_id"
           ",reserve_pub"
           ",inconsistency_gain"
           ",inconsistency_amount"
           " FROM auditor_reserve_balance_insufficient_inconsistency"
           " WHERE row_id>$1"
           );
  qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
                                             "auditor_reserve_balance_insufficient_inconsistency_get",
                                             params,
                                             &
                                             reserve_balance_insufficient_inconsistency_cb,
                                             &dcc);

  if (qs > 0)
    return dcc.qs;
  GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
  return qs;
}