using System;
using Server;

namespace Server.Misc
{
	public class NameVerification
	{
		public static readonly char[] SpaceDashPeriodQuote = new char[]
			{
				' ', '-', '.', '\''
			};

		public static readonly char[] Empty = new char[0];

		public static void Initialize()
		{
			Commands.CommandSystem.Register( "ValidateName", AccessLevel.Administrator, new Server.Commands.CommandEventHandler( ValidateName_OnCommand ) );
		}

		[Usage( "ValidateName" )]
		[Description( "Checks the result of NameValidation on the specified name." )]
		public static void ValidateName_OnCommand( Server.Commands.CommandEventArgs e )
		{
			if ( Validate( e.ArgString, 2, 16, true, true, true, 1, SpaceDashPeriodQuote ) )
				e.Mobile.SendAsciiMessage( 0x59, "That name is considered valid." );
			else
				e.Mobile.SendAsciiMessage( 0x22, "That name is considered invalid." );
		}

		public static bool Validate( string name, int minLength, int maxLength, bool allowLetters, bool allowDigits, bool noExceptionsAtStart, int maxExceptions, char[] exceptions )
		{
			return Validate( name, minLength, maxLength, allowLetters, allowDigits, noExceptionsAtStart, maxExceptions, exceptions, m_Disallowed, m_StartDisallowed );
		}

		public static bool Validate( string name, int minLength, int maxLength, bool allowLetters, bool allowDigits, bool noExceptionsAtStart, int maxExceptions, char[] exceptions, string[] disallowed, string[] startDisallowed )
		{
			if ( name.Length < minLength || name.Length > maxLength )
				return false;

			int exceptCount = 0;

			name = name.ToLower();

			if ( !allowLetters || !allowDigits || (exceptions.Length > 0 && (noExceptionsAtStart || maxExceptions < int.MaxValue)) )
			{
				for ( int i = 0; i < name.Length; ++i )
				{
					char c = name[i];

					if ( c >= 'a' && c <= 'z' )
					{
						if ( !allowLetters )
							return false;

						exceptCount = 0;
					}
					else if ( c >= '0' && c <= '9' )
					{
						if ( !allowDigits )
							return false;

						exceptCount = 0;
					}
					else
					{
						bool except = false;

						for ( int j = 0; !except && j < exceptions.Length; ++j )
							if ( c == exceptions[j] )
								except = true;

						if ( !except || (i == 0 && noExceptionsAtStart) )
							return false;

						if ( exceptCount++ == maxExceptions )
							return false;
					}
				}
			}

			for ( int i = 0; i < disallowed.Length; ++i )
			{
				int indexOf = name.IndexOf( disallowed[i] );

				if ( indexOf == -1 )
					continue;

				bool badPrefix = ( indexOf == 0 );

				for ( int j = 0; !badPrefix && j < exceptions.Length; ++j )
					badPrefix = ( name[indexOf - 1] == exceptions[j] );

				if ( !badPrefix )
					continue;

				bool badSuffix = ( (indexOf + disallowed[i].Length) >= name.Length );

				for ( int j = 0; !badSuffix && j < exceptions.Length; ++j )
					badSuffix = ( name[indexOf + disallowed[i].Length] == exceptions[j] );

				if ( badSuffix )
					return false;
			}

			for ( int i = 0; i < startDisallowed.Length; ++i )
			{
				if ( name.StartsWith( startDisallowed[i] ) )
					return false;
			}

			return true;
		}

		private static string[] m_StartDisallowed = new string[]
			{
				"seer",
				"counselor",
				"gm",
				"lady",
				"lord"
			};

		private static string[] m_Disallowed = new string[]
			{
				"jigaboo",
				"chigaboo",
				"wop",
				"kyke",
				"kike",
				"tit",
				"spic",
				"prick",
				"piss",
				"lezbo",
				"lesbo",
				"felatio",
				"dyke",
				"dildo",
				"chinc",
				"chink",
				"cunnilingus",
				"cum",
				"cocksucker",
				"cock",
				"clitoris",
				"clit",
				"ass",
				"hitler",
				"penis",
				"nigga",
				"nigger",
				"klit",
				"kunt",
				"jiz",
				"jism",
				"jerkoff",
				"jackoff",
				"goddamn",
				"fag",
				"blowjob",
				"bitch",
				"asshole",
				"dick",
				"pussy",
				"snatch",
				"cunt",
				"twat",
				"shit",
				"fuck",
				"tailor",
				"smith",
				"scholar",
				"rogue",
				"novice",
				"neophyte",
				"merchant",
				"medium",
				"master",
				"mage",
				"lb",
				"journeyman",
				"grandmaster",
				"fisherman",
				"expert",
				"chef",
				"carpenter",
				"british",
				"blackthorne",
				"blackthorn",
				"beggar",
				"archer",
				"apprentice",
				"adept",
				"gamemaster",
				"frozen",
				"squelched",
				"invulnerable",
				"osi",
				"origin"
			};
	}
}