using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace RomCheater.Docking.MemorySearch
{
    public class InRangeComparer : RangedComparer<object>, IRangeComparer<object>
    {
        public InRangeComparer(uint address, object value)
            : base(address, value)
        {
        }
        #region IRangeComparer<object> Members
        public bool Compare(object Start, object End, SearchDataTypes bitsize, bool unsigned, BinaryReader reader)
        {
            reader.BaseStream.Seek(this.Address, SeekOrigin.Begin);

            ulong start_value, end_value;
            start_value = new DataTypeConverter(Start).ToUInt64();
            end_value = new DataTypeConverter(End).ToUInt64();
            DataTypeConverter lookup_value;
            if (bitsize == SearchDataTypes._8bits)
            {
                if (unsigned)
                {
                    lookup_value = new DataTypeConverter(reader.ReadByte());
                    if (lookup_value.ToByte() >= (byte)start_value && lookup_value.ToByte() <= (byte)end_value) { this.Value = lookup_value.Value; return true; }
                }
                else
                {
                    lookup_value = new DataTypeConverter(reader.ReadSByte());
                    if (lookup_value.ToSByte() >= (sbyte)start_value && lookup_value.ToSByte() <= (sbyte)end_value) { this.Value = lookup_value.Value; return true; }
                }
            }
            else if (bitsize == SearchDataTypes._16bits)
            {
                if (unsigned)
                {
                    lookup_value = new DataTypeConverter(reader.ReadUInt16());
                    if (lookup_value.ToUInt16() >= (ushort)start_value && lookup_value.ToUInt16() <= (ushort)end_value) { this.Value = lookup_value.Value; return true; }
                }
                else
                {
                    lookup_value = new DataTypeConverter(reader.ReadInt16());
                    if (lookup_value.ToInt16() >= (short)start_value && lookup_value.ToInt16() <= (short)end_value) { this.Value = lookup_value.Value; return true; }
                }
            }
            else if (bitsize == SearchDataTypes._32bits)
            {
                if (unsigned)
                {
                    lookup_value = new DataTypeConverter(reader.ReadUInt32());
                    if (lookup_value.ToUInt32() >= (uint)start_value && lookup_value.ToUInt32() <= (uint)end_value) { this.Value = lookup_value.Value; return true; }
                }
                else
                {
                    lookup_value = new DataTypeConverter(reader.ReadInt32());
                    if (lookup_value.ToInt32() >= (int)start_value && lookup_value.ToInt32() <= (int)end_value) { this.Value = lookup_value.Value; return true; }
                }
            }
            else if (bitsize == SearchDataTypes._64bits)
            {
                if (unsigned)
                {
                    lookup_value = new DataTypeConverter(reader.ReadUInt64());
                    if (lookup_value.ToUInt64() >= (ulong)start_value && lookup_value.ToUInt64() <= (ulong)end_value) { this.Value = lookup_value.Value; return true; }
                }
                else
                {
                    lookup_value = new DataTypeConverter(reader.ReadInt64());
                    if (lookup_value.ToInt64() >= (long)start_value && lookup_value.ToInt64() <= (long)end_value) { this.Value = lookup_value.Value; return true; }
                }
            }
            return false;
        }
        #endregion
    }
}