#include <unordered_set>
#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 = "SilentHill22024";
const std::string PLUGIN_LOG = PLUGIN_NAME + ".log";

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

// Screen informations
static int screenWidth = GetSystemMetrics(SM_CXSCREEN);
static int screenHeight = GetSystemMetrics(SM_CYSCREEN);
const float baseAspect = 1.7777778; // Game base aspect ratio
static float aspectRatio = (float)screenWidth / screenHeight;

// Plugin states
static bool AOBScanDone = false;
static bool g_Console = 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 int g_AdditionalFOVValue = 0;
static float g_CameraDistanceValue = 1.f;

// Shared values
static float g_FOV_In = 60.f;
static float g_FOV_Out = 60.f;
static float g_CompensatedFOV = 0.f;
static float g_CameraIn = 156.25f;
static float g_CameraOut = 156.25f;
static bool g_Console_Enabled = false;

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

// AOB Scan pointers
static uint8_t* FOVaddress = nullptr;
static uint8_t* UltraWideaddress = nullptr;
static uint8_t* Cameraaddress = nullptr;
static uint8_t* DOFaddress = nullptr;
static uint8_t* CAaddress = nullptr;
static uint8_t* Vignettingaddress = nullptr;
static uint8_t* Fogaddress = nullptr;

// Hooking
static SafetyHookMid FOVHook{};
static SafetyHookMid CameraHook{};
static SafetyHookMid DOFHook{};

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

extern "C" __declspec(dllexport) void SetFixEnabled(bool enabled, bool init)
{
    g_fix_enabled = enabled;
    if (g_fix_enabled && !AOBScanDone) { // Unreal Engine 5.1.1
        logger->info("--------------- AOB scan started ---------------");
        if (FOVaddress == nullptr) {
            constexpr auto FOVStringObfuscated = make_obfuscated<0x4A>("77 ?? 48 8B ?? FF 90 ?? ?? ?? ?? F3 0F ?? ?? ?? 48");
            FOVaddress = Memory::AOBScan("", FOVStringObfuscated.decrypt(), PAGE_EXECUTE_READ, logger);

            if (!FOVaddress)
                logger->warn("FOV signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                logger->info("FOV found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(FOVaddress));
                FOVaddress += 0x10;
            }
        }

        if (UltraWideaddress == nullptr) {
            constexpr auto UltraWideStringObfuscated = make_obfuscated<0x4A>("C7 47 ?? ?? ?? ?? ?? C7 83 ?? ?? ?? ?? ?? ?? ?? ?? 48 8B ?? ?? ?? 48 83");
            UltraWideaddress = Memory::AOBScan("", UltraWideStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            if (!UltraWideaddress)
                logger->warn("Aspect ratio signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                logger->info("Aspect ratio found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(UltraWideaddress));
                UltraWideaddress += 0x3;
            }
        }

        if (!Cameraaddress) {
            constexpr auto DOFStringObfuscated = make_obfuscated<0x4A>("E8 ?? ?? ?? ?? F2 0F ?? ?? ?? ?? 48 8D ?? ?? F3 0F ?? ?? ?? ?? ?? ?? 48 8D");
            Cameraaddress = Memory::AOBScan("", DOFStringObfuscated.decrypt(), PAGE_EXECUTE_READ);

            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 signature found at address: 0x{:X}.", reinterpret_cast<uintptr_t>(Cameraaddress));
                Cameraaddress += 0x17;
            }
        }

        if (!DOFaddress) { // 
            // 48 ?? ?? 8B ?? ?? E8 ?? ?? ?? ?? 48 ?? ?? 48 6B ?? ?? 48 8D
            constexpr auto DOFStringObfuscated = make_obfuscated<0x4A>("83 ?? ?? ?? 0F 8E ?? ?? ?? ?? 0F 2F ?? ?? ?? ?? ?? 0F 83 ?? ?? ?? ?? 0F 2F ?? ?? ?? ?? ?? 0F 83");
            DOFaddress = Memory::AOBScan("", 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));
                //DOFaddress += 0x3;
            }
        }

        if (!CAaddress) {
            constexpr auto CAStringObfuscated = make_obfuscated<0x4A>("7F ?? 89 B3 ?? ?? ?? ?? 8B ?? ?? 39 05 ?? ?? ?? ?? 7E");
            CAaddress = Memory::AOBScan("", 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 ?? 83");
            Vignettingaddress = Memory::AOBScan("", 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>("75 ?? B3 ?? EB ?? 32 ?? 48 8B ?? ?? ?? 48 ?? ?? 74 ?? E8 ?? ?? ?? ?? 0F ?? ?? 48 8B");
            Fogaddress = Memory::AOBScan("", 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));
            }
        }

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

        if (!GObjectsaddress || !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("", GObjetcsStringObfuscated.decrypt(), PAGE_EXECUTE_READ);
            constexpr auto AppendStringStringObfuscated = make_obfuscated<0x4A>("48 89 ?? ?? ?? 48 89 ?? ?? ?? 57 48 83 ?? ?? 80 3D ?? ?? ?? ?? ?? 48 ?? F2 8B ?? 48 ?? ?? 74 ?? 4C 8D ?? ?? ?? ?? ?? EB ?? 48 8D ?? ?? ?? ?? ?? E8 ?? ?? ?? ?? 4C");
            AppendStringaddress = Memory::AOBScan("", AppendStringStringObfuscated.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");
            ProcessEventaddress = Memory::AOBScan("", 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 (!AppendStringaddress)
                logger->warn("AppendString signature not found. Maybe your game has been updated and is no more compatible with this plugin.");
            else {
                std::optional<uint32_t> gAppendStringOffsetOpt = UE::CalculateOffset("", AppendStringaddress);
                uint32_t gAppendStringOffset = *gAppendStringOffsetOpt;
                logger->info("AppendString offset is: 0x{:X}.", gAppendStringOffset);
                Offsets::AppendString = static_cast<UC::uint32>(gAppendStringOffset);// Update AppendString
            }

            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("", 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 && UltraWideaddress) UltraWideFixEnabled();
    if (!init && Cameraaddress) CameraFixEnabled();
    if (!init && DOFaddress) DOFFixEnabled();
    if (!init && CAaddress) CAFixEnabled();
    if (!init && Vignettingaddress) VignettingFixEnabled();
    if (!init && Fogaddress) FogFixEnabled();
}

// Setters for Reshade addon call
extern "C" __declspec(dllexport) void SetFixesEnabled(GameFixes fix, bool enabled)
{ // Set each fix individually
    if (fix == GameFixes::DevConsole)           { g_Console = enabled; 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(); }
}

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

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

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

    infos->FOVIn = g_FOV_In;
    infos->CompensatedFOV = g_CompensatedFOV;
    infos->FOVOut = g_FOV_Out;
    infos->cameraIn = g_CameraIn;
    infos->cameraOut = g_CameraOut;
    infos->consoleEnabled = g_Console_Enabled;
}

// Code injection functions
static void FOVFixEnabled() {
    if (g_fix_enabled && (g_fov_fix_enabled || g_ultrawide_fix_enabled) && FOVaddress) {
        if (!FOVHook) { // Hook only once
            FOVHook = safetyhook::create_mid(FOVaddress,
                [](SafetyHookContext& ctx) {
                    g_FOV_In = ctx.xmm0.f32[0];
                    if (g_fix_enabled && g_ultrawide_fix_enabled)
                        ctx.xmm0.f32[0] = Maths::CompensateHorizontalFOV(g_FOV_In, baseAspect, aspectRatio);
                    g_CompensatedFOV = ctx.xmm0.f32[0];
                    ctx.xmm0.f32[0] += (g_fix_enabled && g_fov_fix_enabled ? g_AdditionalFOVValue : 0);
                    g_FOV_Out = ctx.xmm0.f32[0];
                });
        }
        else FOVHook.enable();
        logger->info("FOV fix enabled");
    }
    if (!(g_fix_enabled && (g_fov_fix_enabled || g_ultrawide_fix_enabled)) && FOVaddress) {
        if (FOVHook) FOVHook.disable();
        logger->info("FOV 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_CameraIn = ctx.xmm1.f32[0];
                    ctx.xmm1.f32[0] *= (g_fix_enabled && g_camera_fix_enabled ? g_CameraDistanceValue : 1.f);
                    g_CameraOut = ctx.xmm1.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");
    }
}

static void DOFFixEnabled() {
    if (g_fix_enabled && g_DOF_fix_enabled && DOFaddress) {
        if (!DOFHook) {
            DOFHook = safetyhook::create_mid(DOFaddress,
                [](SafetyHookContext& ctx) {
                    if (!ctx.rax) return;
                    uint8_t* rDepthOfFieldQuality = reinterpret_cast<uint8_t*>(ctx.rax) + 0x4;
                    if (g_DOF_fix_enabled)
                        Memory::PatchBytes(rDepthOfFieldQuality, "\x00", 1); // r.DepthOfFieldQuality = 0 <= memory patched
                    else 
                        Memory::RestoreBytes(rDepthOfFieldQuality); // r.DepthOfFieldQuality = 0 <= memory patched
                });
        }
        logger->info("Depth of field fix enabled");
    }
    if (!(g_fix_enabled && g_DOF_fix_enabled) && DOFaddress)
        logger->info("Depth of field fix disabled");
}

// Memory patch fixes
static void UltraWideFixEnabled() {
    if (g_fix_enabled && g_ultrawide_fix_enabled && UltraWideaddress) {
        const char* newAspectRatio = Memory::Float32ToHexBytes(aspectRatio); // Converts new apsect ratio in 4 char bytes
        Memory::PatchBytes(UltraWideaddress, newAspectRatio, 4); // mov[rdi + 48], 3FE38E39 <== patch here
        logger->info("Ultra wide fix enabled");
        FOVFixEnabled();
    }
    if (!(g_fix_enabled && g_ultrawide_fix_enabled) && UltraWideaddress) {
        Memory::RestoreBytes(UltraWideaddress);
        logger->info("Ultra wide fix disabled");
        if (!g_fov_fix_enabled) FOVFixEnabled();
    }
}

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 FogFixEnabled() {
    if (g_fix_enabled && g_Fog_fix_enabled && Fogaddress) {
        Memory::PatchBytes(Fogaddress, "\xEB", 1); // jmp r.Fog 0
        logger->info("Fog fix enabled");
    }
}

// UE Console creation
static void EnableConsole()
{
    if (!g_Console) {
        logger->info("------------------ User inputs ------------------");
        return;
    }

    logger->info("-------------- Console re-enabling --------------");
    if (!GObjectsaddress || !AppendStringaddress || !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;

            // Set the all the console shortkey to F2
            for (int i = 0; i < UInputSettings::GetDefaultObj()->ConsoleKeys.Num(); i++)
            {
                UInputSettings::GetDefaultObj()->ConsoleKeys[i].KeyName = UKismetStringLibrary::Conv_StringToName(L"F2");
            }
            logger->info("Console fully reactivated in {:.3f}s and bound to key F2", elapsed.count());
            g_Console_Enabled = true;
        }
        else
            logger->error("Could not spawn console object");

        logger->info("------------------ User inputs ------------------");
        }).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>("Silent Hill 2 2024", 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;
}