using System;
using System.Text.RegularExpressions;

namespace BunyMuny {
	public class Rule {
		public RuleMatch Match { get; set; }
		public string Value { get; set; }
		public string Category { get; set; }
		public string Description { get; set; }
		public bool CaseSensitive { get; set; } // TODO: make this have an effect

		/// <summary>
		/// Checks whether or not a given value matches the rule.
		/// </summary>
		/// <param name="input">The string to check against the rule's Value.</param>
		/// <returns></returns>
		public bool Check(string input) {
			var value = Value;
			if (!CaseSensitive) {
				input = input.ToLower();
				value = value.ToLower();
			}
			switch (Match) {
				case RuleMatch.Exact:
					return input == value;
				case RuleMatch.Start:
					return input.StartsWith(value);
				case RuleMatch.End:
					return input.EndsWith(value);
				case RuleMatch.Regex:
					var re = new Regex(value);
					return re.IsMatch(input);
				case RuleMatch.Contains:
					return input.Contains(value);
				default:
					return false;
			}
		}
	}
}