//	Spludlow Software
//	Copyright © Samuel P. Ludlow 2020 All Rights Reserved
//	Distributed under the terms of the GNU General Public License version 3
//	Distributed WITHOUT ANY WARRANTY; without implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
//	https://www.spludlow.co.uk/LICENCE.TXT
//	The Spludlow logo is a registered trademark of Samuel P. Ludlow and may not be used without permission
//	v1.14

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Spludlow
{
	public class Variations
	{
		public Dictionary<string, List<string>> WordVariations;

		public Variations(string[] definition)
		{
			this.WordVariations = new Dictionary<string, List<string>>();

			foreach (string line in definition)
			{
				string[] words = Spludlow.Text.Split(line, '\t', true);

				List<string> list = new List<string>();

				foreach (string word in words)
					list.Add(word.ToLower());

				this.WordVariations.Add(words[0], list);
			}

			List<string> allList = new List<string>();
			foreach (string key in this.WordVariations.Keys)
			{
				foreach (string word in this.WordVariations[key])
				{
					if (allList.Contains(word) == true)
						throw new ApplicationException("Word Variations; Duplicate word:\t" + word);

					allList.Add(word);
				}
			}
		}

		public string Match(string keyword)
		{
			string keywordLower = keyword.ToLower();

			foreach (string key in this.WordVariations.Keys)
			{
				if (this.WordVariations[key].Contains(keywordLower) == true)
					return key;
			}

			return keywordLower;
		}
	}
}