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using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Linq;

using System.Reflection;

using Mono.Reflection;

using WowPacketParser.Misc;

using WowPacketParser.Parsing;

namespace HandlerQuery

{

static class HandlerQuery

{

static HandlerQuery()

{

var stopwatch = Stopwatch.StartNew();

var asm = Assembly.LoadFrom("WowPacketParser.exe");

var types = asm.GetTypes();

var methods = (from type in types

where type.IsAbstract

where type.IsPublic

from method in type.GetMethods()

where method.IsPublic

let attrs = (ParserAttribute[])method.GetCustomAttributes(typeof(ParserAttribute), false)

where attrs.Length > 0

let parms = method.GetParameters()

where parms.Length > 0

where parms[0].ParameterType == typeof(Packet)

select method).ToList();

_instructions = new Dictionary<MethodInfo, List<Instruction>>(methods.Count);

foreach (var methodInfo in methods)

{

try

{

_instructions.Add(methodInfo, new List<Instruction>(methodInfo.GetInstructions()));

}

catch (ArgumentException) { }

}

FilterInstructions();

ConvertToReads();

stopwatch.Stop();

Console.WriteLine("Read dictionary built (it took: {0}).", stopwatch.Elapsed);

}

static private readonly Dictionary<MethodInfo, List<Instruction>> _instructions;

static private Dictionary<MethodInfo, List<ReadMethods>> _readMethods;

static public Dictionary<MethodInfo, List<ReadMethods>> GetReadDictionary()

{

return _readMethods;

}

static private void FilterInstructions()

{

foreach (var instruction in _instructions)

instruction.Value.RemoveAll(inst =>

inst.OpCode.Value != 111 ||

!inst.Operand.ToString().Contains("Read"));

}

static private void ConvertToReads()

{

_readMethods = new Dictionary<MethodInfo, List<ReadMethods>>();

foreach (var instructions in _instructions)

{

var reads = new List<ReadMethods>();

foreach (var instruction in instructions.Value)

{

var method = instruction.Operand as MethodInfo;

if (method != null)

{

var str = method.Name.Remove(0, 4); // Remove "Read"

ReadMethods type;

switch (str)

{

// unsupported:

// ReadBit, ReadBits, ReadBytes,

case "ead": // from CanRead

case "ToEnd": // from ReadToEnd

case "Bit":

case "Bits":

case "Bytes":

{

type = ReadMethods.Ignore;

break;

}

case "EntryWithName":

{

var typeArgs = method.GetGenericArguments();

if (typeArgs.Length == 1)

type = SimpleTypeToReadMethod(typeArgs[0].Name);

else

{

type = ReadMethods.Unknown;

Console.WriteLine("Method {0} got an unexpected number of generic types", method);

}

break;

}

case "Value":

case "Enum":

{

// FIXME: 2nd parameter of ReadEnum (TypeCode)

// and 1st parameter of ReadValue defines what

// to read. Find out a way to know what it is.

// for now assuming it's an int32.

type = ReadMethods.ReadInt32;

break;

}

case "Vector2":

{

type = ReadMethods.Ignore;

reads.Add(ReadMethods.ReadFloat);

reads.Add(ReadMethods.ReadFloat);

break;

}

case "Vector3":

{

type = ReadMethods.Ignore;

reads.Add(ReadMethods.ReadFloat);

reads.Add(ReadMethods.ReadFloat);

reads.Add(ReadMethods.ReadFloat);

break;

}

case "Vector4":

{

type = ReadMethods.Ignore;

reads.Add(ReadMethods.ReadFloat);

reads.Add(ReadMethods.ReadFloat);

reads.Add(ReadMethods.ReadFloat);

reads.Add(ReadMethods.ReadFloat);

break;

}

default:

{

type = SimpleTypeToReadMethod(str);

break;

}

}

if (type == ReadMethods.Unknown)

Console.WriteLine("ReadMethod not found for method {0}", method);

else if (type != ReadMethods.Ignore)

reads.Add(type);

}

else

{

Console.WriteLine("Instruction's operand ({0}) is not a MethodInfo", instruction.Operand);

}

}

_readMethods.Add(instructions.Key, reads);

}

}

static private ReadMethods SimpleTypeToReadMethod(string type)

{

switch (type)

{

case "Boolean":

case "Byte":

case "SByte":

return ReadMethods.ReadInt8;

case "Int16":

case "UInt16":

return ReadMethods.ReadInt16;

case "Int32":

case "UInt32":

case "Entry":

case "LfgEntry":

case "Time":

case "PackedTime":

case "PackedVector3":

return ReadMethods.ReadInt32;

case "Int64":

case "UInt64":

return ReadMethods.ReadInt64;

case "Single":

return ReadMethods.ReadFloat;

case "Guid":

return ReadMethods.ReadGuid;

case "PackedGuid":

return ReadMethods.ReadPackedGuid;

case "IPAddress":

return ReadMethods.ReadIP;

case "CString":

case "WoWString":

case "Chars":

return ReadMethods.ReadString;

default:

Console.WriteLine("ReadMethod not found for type {0}", type);

return ReadMethods.Ignore;

}

}

}

}