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// dllmain.cpp : DLL uygulamasının giriş noktasını tanımlar.
#include "pch.h"
#include <TlHelp32.h>
#include <iostream>
#include <Windows.h>
#include <psapi.h>
#include <thread>
#include <string>

#include "MinHook.h"

#pragma comment(lib, "MinHook.x86.lib")

MODULEINFO GetModuleInfo(const char* szModule)
{
    MODULEINFO modinfo = { 0 };
    HMODULE hModule = GetModuleHandleA(szModule);
    if (!hModule) {
        MessageBox(NULL, "COULDNT FIND HANDLE!", "ERROR", MB_ICONERROR);
        return modinfo;
    }
    if (hModule == 0)
        return modinfo;
    GetModuleInformation(GetCurrentProcess(), hModule, &modinfo, sizeof(MODULEINFO));
    return modinfo;
}

DWORD FindPattern(const char* module, const char* pattern, const char* mask)
{
    MODULEINFO mInfo = GetModuleInfo(module);

    DWORD base = (DWORD)mInfo.lpBaseOfDll;
    DWORD size = (DWORD)mInfo.SizeOfImage;

    DWORD patternLength = (DWORD)strlen(mask);

    for (DWORD i = 0; i < size - patternLength; i++)
    {
        bool found = true;
        for (DWORD j = 0; j < patternLength; j++)
        {
            found &= mask[j] == '?' || pattern[j] == *(char*)(base + i + j);
        }

        if (found)
        {
            return base + i;
        }
    }
    MessageBox(NULL, "COULDNT FIND PATTERN", "ERROR", MB_ICONERROR);
    return NULL;
}

void* g_ffsAntiCheatPtr = nullptr;
void* g_ptrCResourceManager = nullptr;

typedef void* (__thiscall* CResourceAdd_t)(void* ecx, unsigned short usNetID, const char* szResourceName, void* pResourceEntity, void* pResourceDynamicEntity, const std::string& strMinServerReq, const std::string& strMinClientReq, bool bEnableOOP);
CResourceAdd_t oCResourceAdd = nullptr;

void* __fastcall CResourceAdd(void* ecx, void* edx, unsigned short usNetID, const char* szResourceName, void* pResourceEntity, void* pResourceDynamicEntity, const std::string& strMinServerReq, const std::string& strMinClientReq, bool bEnableOOP)
{
    g_ptrCResourceManager = ecx;
    return oCResourceAdd(ecx, usNetID, szResourceName, pResourceEntity, pResourceDynamicEntity, strMinServerReq, strMinClientReq, bEnableOOP);
}

typedef void* (__thiscall* CResourceConstructor_t)(void* ECX, unsigned short usNetID, const char* szResourceName, void* pResourceEntity, void* pResourceDynamicEntity, const std::string& strMinServerReq, const std::string& strMinClientReq, bool bEnableOOP);
CResourceConstructor_t oCResourceConstructor = nullptr;

void* __fastcall CResourceConstructor(void* ECX, void* EDX, unsigned short usNetID, const char* szResourceName, void* pResourceEntity, void* pResourceDynamicEntity, const std::string& strMinServerReq, const std::string& strMinClientReq, bool bEnableOOP) {
    if (szResourceName == "ffs_anticheat") {
        g_ffsAntiCheatPtr = ECX;
    }
    return oCResourceConstructor(ECX, usNetID, szResourceName, pResourceEntity, pResourceDynamicEntity, strMinServerReq, strMinClientReq, bEnableOOP);
}

typedef void(__thiscall* StopResource_t)(void* resourcemanager, void* resource);
StopResource_t oStopResource = nullptr;

void Load() {
    oStopResource = (StopResource_t)FindPattern("client.dll", "\x55\x8B\xEC\x83\xEC\x00\x53\x56\x57\x8B\xF9\x8B\x4D\x00\x89\x7D", "xxxxx?xxxxxxx?xx");
    oCResourceAdd = (CResourceAdd_t)FindPattern("client.dll", "\x55\x8B\xEC\x6A\x00\x68\x00\x00\x00\x00\x64\xA1\x00\x00\x00\x00\x50\x83\xEC\x00\x53\x56\x57\xA1\x00\x00\x00\x00\x33\xC5\x50\x8D\x45\x00\x64\xA3\x00\x00\x00\x00\x8B\xF1\x68\x00\x00\x00\x00\xE8\x00\x00\x00\x00\x83\xC4\x00\x89\x45\x00\xC7\x45\x00\x00\x00\x00\x00\x85\xC0\x74\x00\xFF\x75\x00\x8B\xC8\xFF\x75\x00\xFF\x75\x00\xFF\x75\x00\xFF\x75\x00\xFF\x75\x00\xFF\x75", "xxxx?x????xx????xxx?xxxx????xxxxx?xx????xxx????x????xx?xx?xx?????xxx?xx?xxxx?xx?xx?xx?xx?xx");
    oCResourceConstructor = (CResourceConstructor_t)FindPattern("client.dll", "\x55\x8B\xEC\x6A\x00\x68\x00\x00\x00\x00\x64\xA1\x00\x00\x00\x00\x50\x83\xEC\x00\xA1\x00\x00\x00\x00\x33\xC5\x89\x45\x00\x56\x57\x50\x8D\x45\x00\x64\xA3\x00\x00\x00\x00\x89\x4D\x00\x89\x4D\x00\x8B\x45\x00\x0F\x57\xC0\x8B\x55", "xxxx?x????xx????xxx?x????xxxx?xxxxx?xx????xx?xx?xx?xxxxx");

    if (MH_CreateHook(oCResourceAdd, &CResourceAdd, reinterpret_cast<LPVOID*>(&oCResourceAdd)) != MH_OK) {
        MessageBox(NULL, "Failed to create hook for CResourceAdd", "Error", MB_OK | MB_ICONERROR);
        return;
    }

    if (MH_CreateHook(oCResourceConstructor, &CResourceConstructor, reinterpret_cast<LPVOID*>(&oCResourceConstructor)) != MH_OK) {
        MessageBox(NULL, "Failed to create hook for CResourceConstructor", "Error", MB_OK | MB_ICONERROR);
        return;
    }

    while (true) {
        if (GetAsyncKeyState(VK_NEXT) & 0x8000) {
            oStopResource(g_ptrCResourceManager, g_ffsAntiCheatPtr);
        }

        Sleep(750);
    }
}

BOOL APIENTRY DllMain(HMODULE hModule, DWORD reason, LPVOID lpReserved) {
    if (reason == 1) {
        CloseHandle(CreateThread(NULL, NULL, reinterpret_cast<LPTHREAD_START_ROUTINE>(Load), NULL, NULL, NULL));
    }
    return 1;
}