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/*
========================================================================
SchemaCrawler
http://www.schemacrawler.com
Copyright (c) 2000-2025, Sualeh Fatehi .
All rights reserved.
------------------------------------------------------------------------

SchemaCrawler 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.

SchemaCrawler and the accompanying materials are made available under
the terms of the Eclipse Public License v1.0, GNU General Public License
v3 or GNU Lesser General Public License v3.

You may elect to redistribute this code under any of these licenses.

The Eclipse Public License is available at:
http://www.eclipse.org/legal/epl-v10.html

The GNU General Public License v3 and the GNU Lesser General Public
License v3 are available at:
http://www.gnu.org/licenses/

========================================================================
*/

package schemacrawler.loader.counts;

import static java.util.Objects.requireNonNull;
import schemacrawler.schema.Table;
import us.fatehi.utility.UtilityMarker;

@UtilityMarker
public final class TableRowCountsUtility {

  private static final int UNKNOWN_TABLE_ROW_COUNT = -1;
  private static final String TABLE_ROW_COUNT_KEY = "schemacrawler.table.row_count";

  public static long getRowCount(final Table table) {
    if (table == null) {
      return UNKNOWN_TABLE_ROW_COUNT;
    }

    return table.getAttribute(TABLE_ROW_COUNT_KEY, (long) UNKNOWN_TABLE_ROW_COUNT);
  }

  /**
   * Message format for the counts.
   *
   * @param number Number value in the message
   * @return Message format for the counts
   */
  public static String getRowCountMessage(final Number number) {
    requireNonNull(number, "No number provided");
    final long longValue = number.longValue();
    if (longValue <= 0) {
      return "empty";
    } else {
      return String.format("%,d rows", longValue);
    }
  }

  public static String getRowCountMessage(final Table table) {
    return getRowCountMessage(getRowCount(table));
  }

  public static boolean hasRowCount(final Table table) {
    return table != null && table.hasAttribute(TABLE_ROW_COUNT_KEY);
  }

  static void addRowCountToTable(final Table table, final long rowCount) {
    if (table != null) {
      if (rowCount >= 0) {
        table.setAttribute(TABLE_ROW_COUNT_KEY, rowCount);
      } else {
        table.removeAttribute(TABLE_ROW_COUNT_KEY);
      }
    }
  }

  private TableRowCountsUtility() {
    // Prevent instantiation
  }
}