#define IMGUI_DISABLE_INCLUDE_IMCONFIG_H
#define IMGUI_HAS_DOCK 1

#include "CommonHeaders.h"
#include <Windows.h>

// Screen informations
static int screenWidth = GetSystemMetrics(SM_CXSCREEN);
static int screenHeight = GetSystemMetrics(SM_CYSCREEN);
static float aspectRatio = (float)screenWidth / screenHeight;

// Core game dll functions declarations
typedef void (*SetBoolFn)(bool, bool);
typedef void (*SetFixesFn)(GameFixes ,bool);
typedef void (*SetIntFn)(int);
typedef void (*SetFloatFn)(float);

static HMODULE fixLib = nullptr;
static LONG g_coreInitialized = 0;
static SetBoolFn SetFixEnabled = nullptr;
static SetFixesFn SetFixes = nullptr;
static SetIntFn SetFOV = nullptr;
static SetFloatFn SetCameraDistance = nullptr;
static SetFloatFn SetFogDensity = nullptr;
static SetFloatFn SetFogMaxOpacity = nullptr;
static GetGameInfosStruct GetGameInfos = nullptr;

void SetFixesEnabled(GameFixes fix, bool value) { if (SetFixes) SetFixes(fix, value); }

// Plugin variables for checkboxes and sliders
static bool fov_fix_enabled = false;
static bool ultrawide_fix_enabled = false;
static bool cutscenes_FPS_fix_enabled = false;
static bool camera_fix_enabled = false;
static bool DOF_fix_enabled = false;
static bool CA_fix_enabled = false;
static bool Vignetting_fix_enabled = false;
static bool Fog_fix_enabled = false;
static bool fix_enabled = false;
static bool console = true;
static int worldFOVvalue = 0.f;
static float CameraDistancevalue = 1.f;
static float fogDensityValue = 0.15f;
static float fogMaxOpacityValue = 1.f;

// Overlays popups
static bool popup_Informations = false;
static bool show_log_overlay = false;
static std::string log_content;

// Plugin settings
const std::string SETTINGS_FILE = "./pluginsettings.ini";
const char* FIX_VERSION = "1.0.2";
const char* FIX_INFORMATIONS = "This fix allows to:\n - Control FOV in game.\n - Enable ultrawide in custcenes.\n - Unlock cutscenes framerate.\n - Control camera distance.\n - Disable depth of field.\n - Disable chromatic aberrations.\n - Disable vignetting.\n - Disable fog.\n - Re enable dev console.";
const char* DONATION_URL = "https://buymeacoffee.com/k4sh44";

// Prepare arrays of checkboxes for ImGui
static FixToggle individualFixes[] = {
    { "FOV", &fov_fix_enabled, GameFixes::FOV },
    { "Ultrawide", &ultrawide_fix_enabled, GameFixes::UltraWide, "This fix is intended for ultrawide displays only (21/9, 32/9 ...)."},
    { "Vignetting", &Vignetting_fix_enabled, GameFixes::Vignetting },
    { "Fog", &Fog_fix_enabled, GameFixes::Fog },
    { "Cutscenes FPS", &cutscenes_FPS_fix_enabled, GameFixes::Framerate, "Unlock cutscenes up to 240 FPS"},
    { "Camera distance", &camera_fix_enabled, GameFixes::Camera },
    { "Depth of field", &DOF_fix_enabled, GameFixes::DOF },
    { "Chromatic aberrations", &CA_fix_enabled, GameFixes::ChromaticAberrations }
};

// Scaling factor based on screen resolution
float scale = (float)screenHeight / 1200;
// Prepare array of sliders for ImGui
static SliderFix sliders[4];

// Load and unload game core dll functions /!\ necessary
static void LoadFixDLL()
{
    if (InterlockedCompareExchange(&g_coreInitialized, 1, 0) != 0)
        return;

    if (GetModuleHandleA("SilentHill2RemakeCore.dll") == nullptr) {
        fixLib = LoadLibraryA("SilentHill2RemakeCore.dll");

        if (!fixLib) {
            MessageBoxA(nullptr, "Impossible to load game core dll", "Erreur", MB_OK);
            return;
        }

        SetFixEnabled = (SetBoolFn)GetProcAddress(fixLib, "SetFixEnabled");
        SetFixes = (SetFixesFn)GetProcAddress(fixLib, "SetFixesEnabled");
        SetFOV = (SetIntFn)GetProcAddress(fixLib, "SetFOV");
        SetCameraDistance = (SetFloatFn)GetProcAddress(fixLib, "SetCameraDistance");
        SetFogDensity = (SetFloatFn)GetProcAddress(fixLib, "SetFogDensity");
        SetFogMaxOpacity = (SetFloatFn)GetProcAddress(fixLib, "SetFogMaxOpacity");
        GetGameInfos = (GetGameInfosStruct)GetProcAddress(fixLib, "GetGameInfos");

        // Apply initial values loaded from settings
        if (SetFOV) SetFOV(worldFOVvalue);
        if (SetCameraDistance) SetCameraDistance(CameraDistancevalue);
        if (SetFogDensity) SetFogDensity(fogDensityValue);
        if (SetFogMaxOpacity) SetFogMaxOpacity(fogMaxOpacityValue);
        if (SetFixEnabled) SetFixEnabled(fix_enabled, true);
        if (SetFixes) {
            SetFixes(GameFixes::FOV, fov_fix_enabled);
            SetFixes(GameFixes::UltraWide, ultrawide_fix_enabled);
            SetFixes(GameFixes::Framerate, cutscenes_FPS_fix_enabled);
            SetFixes(GameFixes::Camera, camera_fix_enabled);
            SetFixes(GameFixes::DOF, DOF_fix_enabled);
            SetFixes(GameFixes::ChromaticAberrations, CA_fix_enabled);
            SetFixes(GameFixes::Vignetting, Vignetting_fix_enabled);
            SetFixes(GameFixes::Fog, Fog_fix_enabled);
            SetFixes(GameFixes::DevConsole, console);
        }

        sliders[0] = { "In game additional FOV", "##FOVValue", SliderType::Int, &worldFOVvalue, -20, 70, SetFOV };
        sliders[1] = { "Camera distance (*)", "##CameraOffset", SliderType::Float, &CameraDistancevalue, 0, 4, SetCameraDistance, "%.2f", "Value is a multiplier." };
        sliders[2] = { "Fog density (*)", "##FogDensityValue", SliderType::Float, &fogDensityValue, 0, 5, SetFogDensity, "%.2f",
                       "This will override engine dynamic value." };
        sliders[3] = { "Fog opacity (*)", "##FogOpacityValue", SliderType::Float, &fogMaxOpacityValue, 0, 1, SetFogMaxOpacity, "%.2f",
                       "This will override engine dynamic value." };
    }
}

// Settings functions
static void SaveSettings()
{
    ini::IniFile pluginIniFile;
    pluginIniFile["1#General fix"].setComment(std::vector<std::string>{ "The following sections are saved by plugin",
                                                                        "You should not need to modify them",
                                                                        " ",
                                                                        "Controls if fix mod (globally) is enabled",
                                                                        "Set Console to false if you don't want to enable it" });
    pluginIniFile["1#General fix"]["Enabled"] = fix_enabled;
    pluginIniFile["1#General fix"]["Console"] = console;
    pluginIniFile["2#Individual fix"].setComment("Controls each fix individually");
    pluginIniFile["2#Individual fix"]["FOV"] = fov_fix_enabled;
    pluginIniFile["2#Individual fix"]["UltraWide"] = ultrawide_fix_enabled;
    pluginIniFile["2#Individual fix"]["Camera"] = camera_fix_enabled;
    pluginIniFile["2#Individual fix"]["DOF"] = DOF_fix_enabled;
    pluginIniFile["2#Individual fix"]["Chromatic aberrations"] = CA_fix_enabled;
    pluginIniFile["2#Individual fix"]["Vignetting"] = Vignetting_fix_enabled;
    pluginIniFile["2#Individual fix"]["Fog"] = Fog_fix_enabled;
    pluginIniFile["2#Individual fix"]["Cutscenes FPS"] = cutscenes_FPS_fix_enabled;
    pluginIniFile["3#Fixes tuning"].setComment("Individual fix fine tune");
    pluginIniFile["3#Fixes tuning"]["World FOV"] = worldFOVvalue;
    pluginIniFile["3#Fixes tuning"]["Camera distance"] = CameraDistancevalue;
    pluginIniFile["3#Fixes tuning"]["Fog density"] = fogDensityValue;
    pluginIniFile["3#Fixes tuning"]["Fog opacity"] = fogMaxOpacityValue;

    pluginIniFile.save(SETTINGS_FILE);
}

static void LoadSettings() {
    ini::IniFile pluginIniFile;
    try {
        pluginIniFile.load(SETTINGS_FILE);
        fix_enabled                 = pluginIniFile["1#General fix"]["Enabled"].as<bool>();
        console                     = pluginIniFile["1#General fix"]["Console"].as<bool>();
        fov_fix_enabled             = pluginIniFile["2#Individual fix"]["FOV"].as<bool>();
        ultrawide_fix_enabled       = pluginIniFile["2#Individual fix"]["UltraWide"].as<bool>();
        camera_fix_enabled          = pluginIniFile["2#Individual fix"]["Camera"].as<bool>();
        DOF_fix_enabled             = pluginIniFile["2#Individual fix"]["DOF"].as<bool>();
        CA_fix_enabled              = pluginIniFile["2#Individual fix"]["Chromatic aberrations"].as<bool>();
        Vignetting_fix_enabled      = pluginIniFile["2#Individual fix"]["Vignetting"].as<bool>();
        Fog_fix_enabled             = pluginIniFile["2#Individual fix"]["Fog"].as<bool>();
        cutscenes_FPS_fix_enabled   = pluginIniFile["2#Individual fix"]["Cutscenes FPS"].as<bool>();
        worldFOVvalue               = pluginIniFile["3#Fixes tuning"]["World FOV"].as<int>();
        CameraDistancevalue         = pluginIniFile["3#Fixes tuning"]["Camera distance"].as<float>();
        fogDensityValue             = pluginIniFile["3#Fixes tuning"]["Fog density"].as<float>();
        fogMaxOpacityValue          = pluginIniFile["3#Fixes tuning"]["Fog opacity"].as<float>();

    }
    catch (const std::exception& e) {}
}

// Read plugin log file
void read_log_file(const std::string& filename) {
    std::ifstream file(filename);
    if (!file.is_open())
    {
        log_content = "Impossible to open file : " + filename;
        return;
    }

    std::ostringstream ss;
    ss << file.rdbuf();
    log_content = ss.str();
}

// Initialize ImGui widgets for Reshade
static void on_overlay_draw(reshade::api::effect_runtime* runtime) {
    ImGuiStyle& style = ImGui::GetStyle();
    style.ItemSpacing = ImVec2(8 * scale, 8 * scale);     // Spacing between widgets
    style.FramePadding = ImVec2(3 * scale, 3 * scale);    // Widgets padding
    style.WindowPadding = ImVec2(10 * scale, 10 * scale); // Overlay padding
    style.CellPadding = ImVec2(10 * scale, 10 * scale);   // Table cells padding

    ImGui::SetNextWindowSize(ImVec2(350 * scale, 150 * scale), ImGuiCond_Once);

    ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0.84f, 0.12f, 0.51f, 1.0f)); // pink
    ImGui::PushStyleColor(ImGuiCol_ButtonHovered, ImVec4(0.84f, 0.12f, 0.51f, 1.0f)); // pink
    ImGui::PushStyleColor(ImGuiCol_ButtonActive, ImVec4(0.84f, 0.2f, 0.51f, 1.0f)); // pink
    ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(0.8f, 1.f, 1.f, 1.f)); // white
    if (ImGui::Button("Like my work ? Consider donation")) ShellExecuteA(NULL, "open", DONATION_URL, NULL, NULL, SW_SHOWNORMAL); // Donation
    ImGui::PopStyleColor(4); // Restore color
    ImGui::SameLine();
    if (ImGui::Button("Fix informations")) popup_Informations = true; // Fix information
    ImGui::SameLine();
    if (ImGui::Button("View logs")) {
        read_log_file("SilentHill22024.log");
        show_log_overlay = true; // Fix information
    }

    if (popup_Informations) {
        ImGui::Begin("Informations", &popup_Informations, ImGuiWindowFlags_AlwaysAutoResize);
        ImGui::Text("Version : %s", FIX_VERSION);
        ImGui::Text(FIX_INFORMATIONS);
        ImGui::End();
    }

    if (show_log_overlay) {
        ImGui::Begin("Game log", &show_log_overlay, ImGuiWindowFlags_AlwaysAutoResize);
        ImGui::TextUnformatted(log_content.c_str());
        ImGui::End();
    }

    if (ImGui::BeginTable("FixesTable", 2, ImGuiTableFlags_SizingStretchSame)) {
        ImGui::TableSetupColumn("LeftFix", ImGuiTableColumnFlags_WidthStretch, 0.4f);
        ImGui::TableSetupColumn("RightFix", ImGuiTableColumnFlags_WidthStretch, 0.6f);
        ImGui::TableNextRow();

        // Drawing a left column with slider and general fix
        ImGui::TableSetColumnIndex(0);
        if (ImGui::CollapsingHeader("Enable fixes", ImGuiTreeNodeFlags_DefaultOpen))
            if (ImGui::Checkbox("Fix enabled", &fix_enabled)) { 
                if (SetFixEnabled) SetFixEnabled(fix_enabled, false);
                SaveSettings();
            }
        // Individual fixes
        ImGui::TableSetColumnIndex(1);
        if (ImGui::CollapsingHeader("Individual fixes", ImGuiTreeNodeFlags_DefaultOpen)) {
            if (ImGui::BeginTable("IndividualFixesTable", 2, ImGuiTableFlags_SizingStretchSame)) {
                ImGui::TableSetupColumn("IndFix1", ImGuiTableColumnFlags_WidthStretch, 0.4f);
                ImGui::TableSetupColumn("IndFix2", ImGuiTableColumnFlags_WidthStretch, 0.6f);
                ImGui::TableNextRow();

                ImGui::TableSetColumnIndex(0);
                for (int i = 0; i < 4; ++i) DrawFixCheckbox(individualFixes[i]);

                ImGui::TableSetColumnIndex(1);
                for (int i = 4; i < IM_ARRAYSIZE(individualFixes); ++i) DrawFixCheckbox(individualFixes[i]);

                ImGui::EndTable();
            }
        }
        ImGui::EndTable();
    }
    // Draw individual fix sliders
    ImGui::SetCursorPosY(ImGui::GetCursorPosY() - 2 * style.ItemSpacing.y);
    if (ImGui::BeginTable("FixesSliders", 2, ImGuiTableFlags_SizingStretchSame)) {
        ImGui::TableNextRow();
        ImGui::TableSetColumnIndex(0);
        for (int i = 0; i < 2; ++i) DrawSlider(sliders[i], 200);
        ImGui::TableSetColumnIndex(1);
        for (int i = 2; i < 4; ++i) DrawSlider(sliders[i], 200);
        ImGui::EndTable();
    }
    ImGui::EndTabItem();

    // Fix status
    if (ImGui::CollapsingHeader("Fix informations", ImGuiTreeNodeFlags_DefaultOpen)) {
        ImGui::Text("Screen width: %d, height: %d, aspect ratio: %.2f", screenWidth, screenHeight, aspectRatio);
        if (GetGameInfos) {
            GameInfos infos{};
            GetGameInfos(&infos);
            if (infos.consoleEnabled)
                ImGui::Text("Console enabled and bound to key F2");
            ImGui::TextColored(ImColor(48, 179, 25), "FOV In: %.2f, Compensated: %.2f, Out: %.2f", infos.FOVIn, infos.CompensatedFOV, infos.FOVOut);
            ImGui::TextColored(ImColor(48, 179, 25), "Camera distance In: %.2f, Out: %.2f", infos.cameraIn, infos.cameraOut);
        }
    }
}

// Main dll intrance
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID) {
    switch (ul_reason_for_call) {
        case DLL_PROCESS_ATTACH:
            if (!reshade::register_addon(hinstDLL))
                return FALSE;
            LoadSettings();

            reshade::register_overlay("Silent Hill 2 Remake", &on_overlay_draw);
            reshade::register_event<reshade::addon_event::init_effect_runtime>(
                [](reshade::api::effect_runtime* runtime) {
                    LoadFixDLL();
                });
            break;
        case DLL_PROCESS_DETACH:
            reshade::unregister_addon(hinstDLL);
            break;
    }
    return TRUE;
}