/*
 * Copyright (c) 2005-2006 Erik Tigerholm <eriktigerholm@gmail.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
using System;
using System.Collections.Generic;
using System.Text;

namespace OpenTraffic.Model
{
    [Serializable]
    public class ClassField
    {
        public int Field { get; private set; }

        public ClassField(string str)
        {
            Field = 0;
            if (str != null)
            {
                for (int i = str.Length - 1; i >= 0; i--)
                {
                    char c = str[i];
                    Field = Field << 1;
                    if (c != '0') Field += 1;
                }
            }
        }

        public ClassField(int i)
        {
            this.Field = i;
        }

        public ClassField(bool b)
        {
            Reset(b);
        }

        public void Reset(bool b)
        {
            Field = b ? 0xffffff : 0;
        }

        public bool IsSet(VehicleClass c)
        {
            if (c != null)
            {
                return (((1 << (c.IdRegister - 1)) & Field) != 0);
            }

            return false;
        }

        public void Set(VehicleClass c, bool value)
        {
            if (c != null)
            {
                if (IsSet(c) == value) return;
                Field = ((1 << (c.IdRegister - 1)) ^ Field);
            }
        }

        public static ClassField operator |(ClassField cf1, ClassField cf2)
        {
            return BitwiseOr(cf1, cf2);
        }

        public static ClassField BitwiseOr(ClassField cf1, ClassField cf2)
        {
            if (cf1 != null && cf2 != null)
            {
                return new ClassField(cf1.Field | cf2.Field);
            }

            return null;
        }

        public static ClassField operator &(ClassField cf1, ClassField cf2)
        {
            return BitwiseAnd(cf1, cf2);
        }

        public static ClassField BitwiseAnd(ClassField cf1, ClassField cf2)
        {
            if (cf1 != null && cf2 != null)
            {
                return new ClassField(cf1.Field & cf2.Field);
            }

            return null;
        }
    }
}