﻿/* Copyright (C) 2011  Jan Källman
 *
 * 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.
 *
 * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
 * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
 *
 * All code and executables are provided "as is" with no warranty either express or implied.
 * The author accepts no liability for any damage or loss of business that this product may cause.
 *
 * Code change notes:
 *
 * Author							Change						Date
 *******************************************************************************
 * Mats Alm   		                Added		                2015-04-06
 *******************************************************************************/


namespace AppsheetEpplus;

public class RowMatcher {
  private readonly WildCardValueMatcher _wildCardValueMatcher;
  private readonly NumericExpressionEvaluator _numericExpressionEvaluator;

  public RowMatcher()
      : this(new(), new()) {}

  public RowMatcher(
      WildCardValueMatcher wildCardValueMatcher,
      NumericExpressionEvaluator numericExpressionEvaluator) {
    _wildCardValueMatcher = wildCardValueMatcher;
    _numericExpressionEvaluator = numericExpressionEvaluator;
  }

  public bool IsMatch(ExcelDatabaseRow row, ExcelDatabaseCriteria criteria) {
    var retVal = true;
    foreach (var c in criteria.Items) {
      var candidate = c.Key.FieldIndex.HasValue
          ? row[c.Key.FieldIndex.Value]
          : row[c.Key.FieldName];
      var crit = c.Value;
      if (candidate.IsNumeric() && crit.IsNumeric()) {
        if (System.Math.Abs(
                ConvertUtil.GetValueDouble(candidate) - ConvertUtil.GetValueDouble(crit))
            > double.Epsilon) {
          return false;
        }
      } else {
        var criteriaString = crit.ToString();
        if (!Evaluate(candidate, criteriaString)) {
          return false;
        }
      }
    }
    return retVal;
  }

  private bool Evaluate(object obj, string expression) {
    if (obj == null) {
      return false;
    }
    double? candidate = default(double?);
    if (ConvertUtil.IsNumeric(obj)) {
      candidate = ConvertUtil.GetValueDouble(obj);
    }
    if (candidate.HasValue) {
      return _numericExpressionEvaluator.Evaluate(candidate.Value, expression);
    }
    return _wildCardValueMatcher.IsMatch(expression, obj.ToString()) == 0;
  }
}