﻿/* 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		                2015-01-15
 *******************************************************************************/

using System.Collections.Generic;

namespace AppsheetEpplus;

public abstract class MultipleRangeCriteriasFunction : ExcelFunction {
  private readonly NumericExpressionEvaluator _numericExpressionEvaluator;
  private readonly WildCardValueMatcher _wildCardValueMatcher;

  protected MultipleRangeCriteriasFunction()
      : this(new(), new()) {}

  protected MultipleRangeCriteriasFunction(
      NumericExpressionEvaluator evaluator,
      WildCardValueMatcher wildCardValueMatcher) {
    Require.That(evaluator).Named("evaluator").IsNotNull();
    Require.That(wildCardValueMatcher).Named("wildCardValueMatcher").IsNotNull();
    _numericExpressionEvaluator = evaluator;
    _wildCardValueMatcher = wildCardValueMatcher;
  }

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

  protected List<int> GetMatchIndexes(ExcelDataProvider.IRangeInfo rangeInfo, object searched) {
    var result = new List<int>();
    var internalIndex = 0;
    for (var row = rangeInfo.Address._fromRow; row <= rangeInfo.Address._toRow; row++) {
      for (var col = rangeInfo.Address._fromCol; col <= rangeInfo.Address._toCol; col++) {
        var candidate = rangeInfo.GetValue(row, col);
        if (Evaluate(candidate, searched)) {
          result.Add(internalIndex);
        }
        internalIndex++;
      }
    }
    return result;
  }
}