using Sarand.Net.Standard.Base.Utils;
using System;
using System.Collections.Generic;
using System.Text;

namespace Sarand.Net.Standard.Base.Core
{
	//=======================================================================
	/// <summary>
	/// Code parameter value with flag to indicate whether the value
	/// is included (valid as a filter) or excluded (explicitly not matched).
	/// </summary>
	public class CodeParam
	{
		//-------------------------------------------------------------------
		// Construction.
		public CodeParam (String code, bool including)
		{
			Code = StringUtil.EmptyOnNull(code);
			Including = including;
		}

		//-------------------------------------------------------------------
		// Properties.
		/// <summary>Code parameter.</summary>
		public String Code { get; }
		/// <summary>Whether the value is included (valid as a filter) or excluded (explicitly not matched).</summary>
		public bool Including { get; }

		//-------------------------------------------------------------------
		/// <summary>Determine if the two code params 'match' - taking code and 'sense' flag into account.</summary>
		public bool Matches (CodeParam cp)
		{
			// Values match if either code is blank:
			if (StringUtil.IsEmpty(Code) || StringUtil.IsEmpty(cp.Code)) return true;

			// Values match if both 'senses' are negative:
			if (!Including && !cp.Including) return true;

			// Values match if both 'senses' are positive and the codes are the same:
			if (Including && cp.Including) return Code.EqualsCI(cp.Code);

			// Values match if 'senses' and codes are different:
			if (Including != cp.Including) return !Code.EqualsCI(cp.Code);

			return false;
		}

		//-------------------------------------------------------------------
		/// <summary>Compare code params - first on code then on flag.</summary>
		public int Compare (CodeParam cp)
		{
			if (Code.EqualsCI(cp.Code))
			{
				// Compare 'Including' flags:
				if (!Including && cp.Including) return 1;
				if (Including && !cp.Including) return -1;
				return 0;
			}
			return Code.CompareTo(cp.Code);
		}

		//-------------------------------------------------------------------
	}
	//=======================================================================
}