#include "CommonHeaders.h"
#include "GameFixes.h"
#include "GameInformations.h"
#include "ObfuscateString.h"
#include "Memory.hpp"
#include "Maths.hpp"
#include "UEngine.hpp"
#include "SDK/Basic.hpp"
#include "SDK/Engine_classes.hpp"

using namespace SDK;

// Constants
const std::string PLUGIN_NAME = "EternalStrands";
const std::string PLUGIN_LOG = PLUGIN_NAME + ".log";
const std::string gameExecutable = "EternalStrandsSteam-Win64-Shipping.exe";

// Logger
std::shared_ptr<spdlog::logger> logger;

// Plugin states
static bool AOBScanDone = false;
static bool g_fix_enabled = false;
static bool g_fov_fix_enabled = false;
static bool g_ultrawide_fix_enabled = false;
static bool g_Camera_fix_enabled = false;
static bool g_DOF_fix_enabled = false;
static bool g_CA_fix_enabled = false;
static bool g_Vignetting_fix_enabled = false;
static bool g_Fog_fix_enabled = false;
static bool g_VolumetricFog_fix_enabled = false;
static int g_AdditionalFOVValue = 0;
static float g_cameraDistanceMultiplier = 1.f;

// Shared values
static float g_FOV_In = 60.f;
static float g_FOV_Out = 60.f;
static float g_Camera_In = 450.f;
static float g_Camera_Out = 450.f;
static bool g_Console_Enabled = false;

// AOB Unreal Engine offsets addresses
static uint8_t* GObjectsaddress = nullptr;
static uint8_t* GNamesaddress = nullptr;
static uint8_t* AppendStringaddress = nullptr;
static uint8_t* ProcessEventaddress = nullptr;

// AOB Scan pointers
static uint8_t* FOVaddress = nullptr;
static uint8_t* Cameraaddress = nullptr;
static uint8_t* DOFaddress = nullptr;
static uint8_t* CAaddress = nullptr;
static uint8_t* Vignettingaddress = nullptr;
static uint8_t* VolumetricFogaddress = nullptr;
static uint8_t* Fogaddress = nullptr;
static uint8_t* CameraComponentaddress = nullptr;
static uint8_t* ConstrainAspectRatioaddress = nullptr;
static uint8_t* AspectRatioAxisConstraintaddress = nullptr;

// Hooking
static SafetyHookMid FOVHook{};
static SafetyHookMid CameraHook{};
static SafetyHookMid FogHook{};
static SafetyHookMid ProcessEventHook{};

// Prototypes
static void FOVFixEnabled();
static void UltraWideFixEnabled();
static void CameraFixEnabled();
static void DOFFixEnabled();
static void CAFixEnabled();
static void VignettingFixEnabled();
static void FogFixEnabled();
static void VolumetricFogFixEnabled();
static void EnableConsole();

extern "C" __declspec(dllexport) void SetFixEnabled(bool enabled, bool init)
{
    g_fix_enabled = enabled;
    if (g_fix_enabled && !AOBScanDone) {
        logger->info("--------------- AOB scan started ---------------");
        if (CameraComponentaddress == nullptr) { // Unreal Engine 5.3.2
            constexpr auto FOVStringObfuscated = make_obfuscated<0x4A>("EB ?? F3 0F ?? ?? ?? ?? ?? ?? F3 0F ?? ?? ?? 8B 83 ?? ?? ?? ?? 89");
            CameraComponentaddress = Memory::AOBScan(gameExecutable, FOVStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!CameraComponentaddress)
                logger->warn("Camera component signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                logger->info("Camera component found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(CameraComponentaddress));
                FOVaddress = CameraComponentaddress +0xa;
                ConstrainAspectRatioaddress = CameraComponentaddress +0x18;
            }
        }

        if (!AspectRatioAxisConstraintaddress) {
            constexpr auto AspectRatioAxisConstraintStringObfuscated = make_obfuscated<0x4A>("41 0F ?? ?? ?? ?? ?? ?? 48 8D ?? ?? ?? ?? ?? 4C ?? ?? 4D ?? ?? E8");
            AspectRatioAxisConstraintaddress = Memory::AOBScan(gameExecutable, AspectRatioAxisConstraintStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!AspectRatioAxisConstraintaddress)
                logger->warn("HOR+ signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else
                logger->info("HOR+ found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(AspectRatioAxisConstraintaddress));
        }

        if (Cameraaddress == nullptr) { // Unreal Engine 5.3.2
            constexpr auto CameraStringObfuscated = make_obfuscated<0x4A>("F3 0F ?? ?? ?? ?? ?? ?? F3 0F ?? ?? ?? F3 41 ?? ?? ?? F2 44");
            Cameraaddress = Memory::AOBScan(gameExecutable, CameraStringObfuscated.decrypt(), PAGE_EXECUTE_READ);
            //"EternalStrandsSteam-Win64-Shipping.exe" + 4521641 - F2 0F 58 F8             - addsd xmm7, xmm0
            //"EternalStrandsSteam-Win64-Shipping.exe" + 4521645 - 0F 29 AD D0 02 00 00    - movaps[rbp + 000002D0], xmm5
            //"EternalStrandsSteam-Win64-Shipping.exe" + 452164C - F3 0F 10 87 A0 02 00 00 - movss xmm0, [rdi + 000002A0]
            //"EternalStrandsSteam-Win64-Shipping.exe" + 4521654 - F3 0F 11 45 D0          - movss[rbp - 30], xmm0
            //"EternalStrandsSteam-Win64-Shipping.exe" + 4521659 - F3 41 0F 59 C0          - mulss xmm0, xmm8

            if (!Cameraaddress)
                logger->warn("Camera signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                logger->info("Camera found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(Cameraaddress));
                Cameraaddress += 0x8;
            }
        }

        if (!DOFaddress) {
            constexpr auto DOFStringObfuscated = make_obfuscated<0x4A>("8B ?? ?? 48 ?? ?? E8 ?? ?? ?? ?? 0F ?? ?? 48 6B ?? ?? 48 8D");
            DOFaddress = Memory::AOBScan(gameExecutable, DOFStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!DOFaddress)
                logger->warn("DOF signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else
                logger->info("DOF signature found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(DOFaddress));
        }

        if (!CAaddress) {
            constexpr auto CAStringObfuscated = make_obfuscated<0x4A>("7F ?? 89 B3 ?? ?? ?? ?? 8B ?? ?? 39 05 ?? ?? ?? ?? 0F 8F");
            CAaddress = Memory::AOBScan(gameExecutable, CAStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!CAaddress)
                logger->warn("Chromatic aberrations signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else
                logger->info("Chromatic aberrations signature found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(CAaddress));
        }

        if (!Vignettingaddress) {
            constexpr auto CAStringObfuscated = make_obfuscated<0x4A>("8B ?? 83 ?? ?? 7D ?? 89 B3 ?? ?? ?? ?? EB");
            Vignettingaddress = Memory::AOBScan(gameExecutable, CAStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!Vignettingaddress)
                logger->warn("Vignetting signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else
                logger->info("Vignetting signature found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(Vignettingaddress));
        }

        if (!Fogaddress) {
            constexpr auto FogStringObfuscated = make_obfuscated<0x4A>("74 ?? 48 8B ?? ?? ?? ?? ?? 83 ?? ?? ?? 75 ?? B3 ?? EB ?? 32 ?? 48 8B ?? ?? ?? 48 ?? ?? 74 ?? E8 ?? ?? ?? ?? 84");
            Fogaddress = Memory::AOBScan(gameExecutable, FogStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!Fogaddress)
                logger->warn("Fog signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                logger->info("Fog signature found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(Fogaddress));
                Fogaddress += 0x9;
            }
        }

        if (!VolumetricFogaddress){
            constexpr auto VolumetricFogStringObfuscated = make_obfuscated<0x4A>("84 ?? 0F 84 ?? ?? ?? ?? 48 ?? ?? 0F 84 ?? ?? ?? ?? 83 3D ?? ?? ?? ?? ?? 0F 84");
            VolumetricFogaddress = Memory::AOBScan(gameExecutable, VolumetricFogStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!VolumetricFogaddress)
                logger->warn("Volumetric fog signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else
                logger->info("Volumetric fog signature found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(VolumetricFogaddress));
        }

        if (CameraComponentaddress && FOVaddress && Cameraaddress && DOFaddress && CAaddress && Vignettingaddress &&
            Fogaddress && VolumetricFogaddress && ConstrainAspectRatioaddress && AspectRatioAxisConstraintaddress) {
            logger->info("All AOB signatures found. Ready to patch...");
            AOBScanDone = true;
        }

        if (!GObjectsaddress || !GNamesaddress || !AppendStringaddress || !ProcessEventaddress) {
            logger->info("------------ UEngine offsets search ------------");
            uint8_t* baseModule = reinterpret_cast<uint8_t*>(GetModuleHandleA(nullptr)); // Get game base address

            constexpr auto GObjetcsStringObfuscated = make_obfuscated<0x4A>("48 8B ?? ?? ?? ?? ?? 48 8B ?? ?? 48 8D ?? ?? EB ?? 33");
            GObjectsaddress = Memory::AOBScan(gameExecutable, GObjetcsStringObfuscated.decrypt(), PAGE_EXECUTE_READ);
            constexpr auto GNamesStringObfuscated = make_obfuscated<0x4A>("48 8D ?? ?? ?? ?? ?? EB ?? 48 8D ?? ?? ?? ?? ?? E8 ?? ?? ?? ?? C6 05 ?? ?? ?? ?? ?? 0F ?? ?? 4C");
            GNamesaddress = Memory::AOBScan(gameExecutable, GNamesStringObfuscated.decrypt(), PAGE_EXECUTE_READ);
            constexpr auto ProcessEventStringObfuscated = make_obfuscated<0x4A>("40 ?? 56 57 41 ?? 41 ?? 41 ?? 41 ?? 48 81 ?? ?? ?? ?? ?? 48 8D ?? ?? ?? 48 89 ?? ?? ?? ?? ?? 48 8B ?? ?? ?? ?? ?? 48 ?? ?? 48 89 ?? ?? ?? ?? ?? 4D 8B");
            ProcessEventaddress = Memory::AOBScan(gameExecutable, ProcessEventStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!GObjectsaddress)
                logger->warn("GObjects signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                uint32_t gObjectsOffset = static_cast<uint32_t>(Memory::GetOffsetFromOpcode(GObjectsaddress + 0x3) - baseModule);
                logger->info("GObjects offset is: 0x{:X}.", gObjectsOffset);
                Offsets::GObjects = static_cast<UC::uint32>(gObjectsOffset); // Update GObjects offset
            }

            if (!GNamesaddress)
                logger->warn("GNames signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                uint32_t gNamesOffset = static_cast<uint32_t>(Memory::GetOffsetFromOpcode(GNamesaddress + 0x3) - baseModule);
                logger->info("GNames offset is: 0x{:X}.", gNamesOffset);
                Offsets::GNames = static_cast<UC::uint32>(gNamesOffset); // Update GNames offset
            }

            if (!ProcessEventaddress)
                logger->warn("Process Event signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                std::optional<uint32_t> gProcessEventOffsetOpt = UE::CalculateOffset(gameExecutable, ProcessEventaddress);
                uint32_t gProcessEventOffset = *gProcessEventOffsetOpt;
                logger->info("Process Event offset is: 0x{:X}.", gProcessEventOffset);
                Offsets::ProcessEvent = static_cast<UC::uint32>(gProcessEventOffset);// Update ProcessEvent offset
            }
        }

        logger->info("-------------- Fixes initialisation -------------");
    }

    if (!init && FOVaddress) FOVFixEnabled();
    if (!init && AspectRatioAxisConstraintaddress && ConstrainAspectRatioaddress) UltraWideFixEnabled();
    if (!init && Cameraaddress) CameraFixEnabled();
    if (!init && DOFaddress) DOFFixEnabled();
    if (!init && CAaddress) CAFixEnabled();
    if (!init && Vignettingaddress) VignettingFixEnabled();
    if (!init && Fogaddress) FogFixEnabled();
    if (!init && VolumetricFogaddress) VolumetricFogFixEnabled();
}

// Setters for Reshade addon call
extern "C" __declspec(dllexport) void SetFixesEnabled(GameFixes fix, bool enabled)
{ // Set each fix individually
    if (fix == GameFixes::DevConsole)           EnableConsole();
    if (fix == GameFixes::FOV)                  { g_fov_fix_enabled = enabled; FOVFixEnabled(); }
    if (fix == GameFixes::UltraWide)            { g_ultrawide_fix_enabled = enabled; UltraWideFixEnabled(); }
    if (fix == GameFixes::Camera)               { g_Camera_fix_enabled = enabled; CameraFixEnabled(); }
    if (fix == GameFixes::DOF)                  { g_DOF_fix_enabled = enabled; DOFFixEnabled(); }
    if (fix == GameFixes::ChromaticAberrations) { g_CA_fix_enabled = enabled; CAFixEnabled(); }
    if (fix == GameFixes::Vignetting)           { g_Vignetting_fix_enabled = enabled; VignettingFixEnabled(); }
    if (fix == GameFixes::Fog)                  { g_Fog_fix_enabled = enabled; FogFixEnabled(); }
    if (fix == GameFixes::VolumetricFog)        { g_VolumetricFog_fix_enabled = enabled; VolumetricFogFixEnabled(); }
}

extern "C" __declspec(dllexport) void SetFOV(int fov)
{
    g_AdditionalFOVValue = fov;
}

extern "C" __declspec(dllexport) void SetCameraDistance(float cameraDistance)
{
    g_cameraDistanceMultiplier = cameraDistance;
}

// Getters for Reshade addon call
extern "C" __declspec(dllexport) void GetGameInfos(GameInfos* infos) {
    if (!infos) return;

    infos->FOVIn = g_FOV_In;
    infos->FOVOut = g_FOV_Out;
    infos->cameraIn = g_Camera_In;
    infos->cameraOut = g_Camera_Out;
    infos->consoleEnabled = g_Console_Enabled;
}

// Code injection functions
static void FOVFixEnabled() {
    if (g_fix_enabled && g_fov_fix_enabled && FOVaddress) {
        if (!FOVHook) { // Hook only once
            FOVHook = safetyhook::create_mid(FOVaddress,
                [](SafetyHookContext& ctx) {
                    g_FOV_In = ctx.xmm0.f32[0];
                    ctx.xmm0.f32[0] += (g_fix_enabled && g_fov_fix_enabled ? g_AdditionalFOVValue : g_FOV_In);
                    g_FOV_Out = ctx.xmm0.f32[0];
                });
        }
        else FOVHook.enable();
        logger->info("FOV fix enabled");
    }
    if (!(g_fix_enabled && g_fov_fix_enabled) && FOVaddress) {
        if (FOVHook) FOVHook.disable();
        logger->info("FOV fix disabled");
    }
}

static void FogFixEnabled() {
    if (g_fix_enabled && g_Fog_fix_enabled && Fogaddress) {
        if (!FogHook) {
            FogHook = safetyhook::create_mid(Fogaddress,
                [](SafetyHookContext& ctx) {
                    if (!ctx.rax) return;
                    uintptr_t* rax = reinterpret_cast<uintptr_t*>(ctx.rax);
                    bool* bFog = reinterpret_cast<bool*>(reinterpret_cast<uint8_t*>(rax) + 0x04);
                    *bFog = g_fix_enabled && g_Fog_fix_enabled ? false : true;
                });
        }
        logger->info("Fog fix enabled");
    }
    if (!(g_fix_enabled && g_Fog_fix_enabled) && Fogaddress)
        logger->info("Fog fix disabled");
}

static void CameraFixEnabled() {
    if (g_fix_enabled && g_Camera_fix_enabled && Cameraaddress) {
        if (!CameraHook) { // Hook only once
            CameraHook = safetyhook::create_mid(Cameraaddress,
                [](SafetyHookContext& ctx) {
                    g_Camera_In = ctx.xmm0.f32[0];
                    ctx.xmm0.f32[0] *= g_cameraDistanceMultiplier;
                    g_Camera_Out = ctx.xmm0.f32[0];
                });
        }
        else CameraHook.enable();

        logger->info("Camera distance fix enabled");
    }
    if (!(g_fix_enabled && g_Camera_fix_enabled) && Cameraaddress) {
        if (CameraHook) CameraHook.disable();
        logger->info("Camera distance fix disabled");
    }
}

// Memory patch fixes
static void UltraWideFixEnabled() {
    if (g_fix_enabled && g_ultrawide_fix_enabled && AspectRatioAxisConstraintaddress && ConstrainAspectRatioaddress) {
        Memory::PatchBytes(AspectRatioAxisConstraintaddress, "\x31\xD2\x90\x90\x90\x90\x90\x90", 8); // AspectRatio_MaintainYFOV = 0
        Memory::PatchBytes(ConstrainAspectRatioaddress, "\x31\xC9\x90\x90\x90\x90\x90", 7); // bConstrainAspectRatio = 0
        logger->info("Ultra wide fix enabled");
    }
    if (!(g_fix_enabled && g_ultrawide_fix_enabled) && AspectRatioAxisConstraintaddress && ConstrainAspectRatioaddress) {
        Memory::RestoreBytes(AspectRatioAxisConstraintaddress);
        Memory::RestoreBytes(ConstrainAspectRatioaddress);
        logger->info("Ultra wide fix disabled");
    }
}

static void DOFFixEnabled() {
    if (g_fix_enabled && g_DOF_fix_enabled && DOFaddress) {
        Memory::PatchBytes(DOFaddress, "\x31\xFF\x90", 3); // xor edi,edi r.DepthOfFieldQuality = 0
        logger->info("Depth of field fix enabled");
    }
    if (!(g_fix_enabled && g_DOF_fix_enabled) && DOFaddress) {
        Memory::RestoreBytes(DOFaddress);
        logger->info("Depth of field fix disabled");
    }
}

static void CAFixEnabled() {
    if (g_fix_enabled && g_CA_fix_enabled && CAaddress) {
        Memory::PatchBytes(CAaddress, "\x90\x90", 2); // NOP x 2 r.SceneColorFringeQuality = 0
        logger->info("Chromatics aberrations fix enabled");
    }
    if (!(g_fix_enabled && g_CA_fix_enabled) && CAaddress) {
        Memory::RestoreBytes(CAaddress);
        logger->info("Chromatics aberrations fix disabled");
    }
}

static void VignettingFixEnabled() {
    if (g_fix_enabled && g_Vignetting_fix_enabled && Vignettingaddress) {
        Memory::PatchBytes(Vignettingaddress, "\x31\xC9", 2); // xor ecx,ecx r.Tonemapper.Quality=0
        logger->info("Vignetting fix enabled");
    }
    if (!(g_fix_enabled && g_Vignetting_fix_enabled) && Vignettingaddress) {
        Memory::RestoreBytes(Vignettingaddress);
        logger->info("Vignetting fix disabled");
    }
}

static void VolumetricFogFixEnabled() {
    if (g_fix_enabled && g_VolumetricFog_fix_enabled && VolumetricFogaddress) {
        Memory::PatchBytes(VolumetricFogaddress, "\x30\xC0", 2); // je-> jmp r.Fog=0
        logger->info("Volumetric fog fix enabled");
    }
    if (!(g_fix_enabled && g_VolumetricFog_fix_enabled) && VolumetricFogaddress) {
        Memory::RestoreBytes(VolumetricFogaddress);
        logger->info("Volumetric fog fix disabled");
    }
}

// UE Console creation
static void EnableConsole()
{
    logger->info("-------------- Console re-enabling --------------");
    if (!GObjectsaddress || !GNamesaddress || !ProcessEventaddress) {
        logger->warn("Could not re-enable console");
        logger->info("------------------ User inputs ------------------");
        return;
    }

    std::thread([&]() {
        auto start = std::chrono::high_resolution_clock::now(); // Measure the time to renable console
        UEngine* Engine = nullptr;

        for (int i = 0; i < 100; ++i) { // gives 10 seconds to find UE Engine
            std::this_thread::sleep_for(std::chrono::milliseconds(100));
            Engine = UEngine::GetEngine();
            if (Engine && Engine->ConsoleClass && Engine->GameViewport)
                break;
        }

        if (!Engine || !Engine->ConsoleClass || !Engine->GameViewport) {
            logger->error("Console could not be found in engine.");
            return;
        }
        logger->info("Console found in engine");

        /* Creates a new UObject of class-type specified by Engine->ConsoleClass */
        UObject* NewObject = UGameplayStatics::SpawnObject(Engine->ConsoleClass, Engine->GameViewport);
        if (NewObject)
        {
            logger->info("Successfully spawned console object");
            // Set the console viewport so that it will be displayed
            Engine->GameViewport->ViewportConsole = static_cast<UConsole*>(NewObject);
            auto end = std::chrono::high_resolution_clock::now();
            std::chrono::duration<double> elapsed = end - start;

            logger->info("Console fully reactivated in {:.3f}s and bound to key Tilde", elapsed.count());
            logger->info("------------------ User inputs ------------------");

            g_Console_Enabled = true;
        }
        else {
            logger->error("Could not spawn console object");
        }
    }).detach();
}

static void InitializeLogger()
{
    try
    {
        std::filesystem::path log_path = std::filesystem::absolute(PLUGIN_LOG);
        if (std::filesystem::exists(log_path))
            std::filesystem::remove(log_path);
        logger = std::make_shared<spdlog::logger>("Eternal Strands", std::make_shared<spdlog::sinks::rotating_file_sink_st>(PLUGIN_LOG, 10 * 1024 * 1024, 1));
        logger->set_level(spdlog::level::debug);
        logger->flush_on(spdlog::level::debug); // Flush automatically
    }
    catch (const spdlog::spdlog_ex& ex)
    {
        std::string plugin_error_message = "Could not open " + PLUGIN_LOG;
        MessageBoxA(nullptr, plugin_error_message.c_str(), "Logger Error", MB_ICONERROR | MB_OK);
    }
}

// Standard dll entry
BOOL APIENTRY DllMain(HMODULE hModule, DWORD reason, LPVOID)
{
    if (reason == DLL_PROCESS_ATTACH)
    {
        InitializeLogger();
        logger->info("Plugin {} loaded.", PLUGIN_NAME);
    }
    else if (reason == DLL_PROCESS_DETACH)
    {
        logger->info("Plugin {} unloaded.", PLUGIN_NAME);
        spdlog::drop_all();
    }
    return TRUE;
}