/*
  Copyright (C) 2013-2018  Brazil
  Copyright (C) 2018-2024  Sutou Kouhei <kou@clear-code.com>

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#pragma once

#include "grn_db.h"
#include "grn_scanner.h"

#ifdef __cplusplus
extern "C" {
#endif

#define GRN_TABLE_SELECTOR_FUZZY_MAX_EXPANSIONS_DEFAULT 10

void
grn_table_selector_init_from_env(void);

typedef struct {
  grn_scanner *scanner;
  grn_obj *expr;
  grn_obj *variable;
  int nth_scan_info;
  scan_info *scan_info;
  grn_obj *initial_result_set;
  grn_obj *result_set;
  grn_id min_id;
  bool is_first_unskipped_scan_info;
  bool is_skipped;
  grn_search_optarg search_options;
} grn_table_selector_data;

struct _grn_table_selector {
  grn_obj *table;
  grn_obj *expr;
  grn_operator op;
  grn_id min_id;
  bool use_sequential_scan;
  grn_obj *query_options;
  float weight_factor;
  double enough_filtered_ratio;
  int64_t max_n_enough_filtered_records;
  bool ensure_using_select_result;
  grn_fuzzy_search_optarg fuzzy_options;
  grn_table_selector_data data;
};

void
grn_table_selector_init(grn_ctx *ctx,
                        grn_table_selector *selector,
                        grn_obj *table,
                        grn_obj *expr,
                        grn_operator op);
void
grn_table_selector_fin(grn_ctx *ctx, grn_table_selector *selector);

#ifdef __cplusplus
}
#endif
