using System;
using Server;
using Server.Commands;

namespace Server.Commands
{
    public class MoveToLocCommand
    {
        public static void Initialize()
        {
            // Registers the command. GMs and Admins can use it.
            CommandSystem.Register( "MoveToLoc", AccessLevel.GameMaster, new CommandEventHandler( MoveToLoc_OnCommand ) );
        }

        [Usage( "MoveToLoc [+x/-x] [+y/-y] [+z/-z]" )]
        public static void MoveToLoc_OnCommand( CommandEventArgs e )
        {
            Mobile from = e.Mobile;

            if ( e.Length < 2 )
            {
                from.SendMessage( "Usage: [MoveToLoc [+x/-x] [+y/-y] [+z/-z]" );
                return;
            }

            int currentX = from.X;
            int currentY = from.Y;
            int currentZ = from.Z;

            int targetX = ParseCoordinate( e.GetString( 0 ), currentX );
            int targetY = ParseCoordinate( e.GetString( 1 ), currentY );
            int targetZ = ( e.Length >= 3 ) ? ParseCoordinate( e.GetString( 2 ), currentZ ) : currentZ;

            from.MoveToWorld( new Point3D( targetX, targetY, targetZ ), from.Map );
        }

        private static int ParseCoordinate( string input, int currentVal )
        {
            if ( string.IsNullOrEmpty( input ) )
                return currentVal;

            // Check if it starts with a relative modification operator
            if ( input.StartsWith( "+" ) || input.StartsWith( "-" ) )
            {
                int modifier = Utility.ToInt32( input );
                return currentVal + modifier; 
            }

            // Otherwise treat it as a standard absolute coordinate
            return Utility.ToInt32( input );
        }
    }
}