#include <hex/api/content_registry.hpp>
#include <hex/api/imhex_api.hpp>

#include <hex/helpers/net.hpp>
#include <hex/helpers/shared_data.hpp>
#include <hex/helpers/utils.hpp>
#include <hex/helpers/fmt.hpp>
#include <hex/helpers/file.hpp>
#include <hex/helpers/literals.hpp>

#include <algorithm>
#include <chrono>
#include <random>
#include <regex>

#include <llvm/Demangle/Demangle.h>
#include "math_evaluator.hpp"

#include <imgui.h>
#define IMGUI_DEFINE_MATH_OPERATORS
#include <imgui_internal.h>

#include <nlohmann/json.hpp>

namespace hex::plugin::builtin {

    namespace {

        using namespace std::literals::string_literals;
        using namespace std::literals::chrono_literals;
        using namespace hex::literals;

        void drawDemangler() {
            static std::vector<char> mangledBuffer(0xF'FFFF, 0x00);
            static std::string demangledName;

            if (ImGui::InputText("hex.builtin.tools.demangler.mangled"_lang, mangledBuffer.data(), 0xF'FFFF)) {
                demangledName = llvm::demangle(mangledBuffer.data());
            }

            ImGui::InputText("hex.builtin.tools.demangler.demangled"_lang, demangledName.data(), demangledName.size(), ImGuiInputTextFlags_ReadOnly);
            ImGui::NewLine();
        }

        void drawASCIITable() {
            static bool asciiTableShowOctal = false;

            ImGui::BeginTable("##asciitable", 4);
            ImGui::TableSetupColumn("");
            ImGui::TableSetupColumn("");
            ImGui::TableSetupColumn("");
            ImGui::TableSetupColumn("");

            ImGui::TableNextColumn();

            for (u8 tablePart = 0; tablePart < 4; tablePart++) {
                ImGui::BeginTable("##asciitablepart", asciiTableShowOctal ? 4 : 3, ImGuiTableFlags_BordersInnerV | ImGuiTableFlags_BordersOuter | ImGuiTableFlags_RowBg);
                ImGui::TableSetupColumn("dec");
                if (asciiTableShowOctal)
                    ImGui::TableSetupColumn("oct");
                ImGui::TableSetupColumn("hex");
                ImGui::TableSetupColumn("char");

                ImGui::TableHeadersRow();

                u32 rowCount = 0;
                for (u8 i = 0; i < 0x80 / 4; i++) {
                    ImGui::TableNextRow(ImGuiTableRowFlags_Headers);

                    ImGui::TableNextColumn();
                    ImGui::Text("%02d", i + 32 * tablePart);

                    if (asciiTableShowOctal) {
                        ImGui::TableNextColumn();
                        ImGui::Text("0o%02o", i + 32 * tablePart);
                    }

                    ImGui::TableNextColumn();
                    ImGui::Text("0x%02x", i + 32 * tablePart);

                    ImGui::TableNextColumn();
                    ImGui::Text("%s", hex::makePrintable(i + 32 * tablePart).c_str());

                    ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0, ((rowCount % 2) == 0) ? 0xFF101010 : 0xFF303030);

                    rowCount++;
                }

                ImGui::EndTable();
                ImGui::TableNextColumn();
            }
            ImGui::EndTable();

            ImGui::Checkbox("hex.builtin.tools.ascii_table.octal"_lang, &asciiTableShowOctal);
            ImGui::NewLine();
        }

        void drawRegexReplacer() {
            static auto regexInput = []{ std::string s; s.reserve(0xFFF); return s; }();
            static auto regexPattern = []{ std::string s; s.reserve(0xFFF); return s; }();
            static auto replacePattern = []{ std::string s; s.reserve(0xFFF); return s; }();
            static auto regexOutput = []{ std::string s; s.reserve(0xFFF); return s; }();

            bool changed1 = ImGui::InputText("hex.builtin.tools.regex_replacer.pattern"_lang, regexPattern.data(), regexPattern.capacity(), ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &regexPattern);
            bool changed2 = ImGui::InputText("hex.builtin.tools.regex_replacer.replace"_lang, replacePattern.data(), replacePattern.capacity(), ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &replacePattern);
            bool changed3 = ImGui::InputTextMultiline("hex.builtin.tools.regex_replacer.input"_lang, regexInput.data(), regexInput.capacity(), ImVec2(0, 0), ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &regexInput);

            if (changed1 || changed2 || changed3) {
                try {
                    regexOutput = std::regex_replace(regexInput.data(), std::regex(regexPattern.data()), replacePattern.data());
                } catch (std::regex_error&) {}
            }

            ImGui::InputTextMultiline("hex.builtin.tools.regex_replacer.output"_lang, regexOutput.data(), regexOutput.size(), ImVec2(0, 0), ImGuiInputTextFlags_ReadOnly);
            ImGui::NewLine();
        }

        void drawColorPicker() {
            static std::array<float, 4> pickedColor = { 0 };

            ImGui::SetNextItemWidth(300.0F);
            ImGui::ColorPicker4("hex.builtin.tools.color"_lang, pickedColor.data(),
                                ImGuiColorEditFlags_Uint8 | ImGuiColorEditFlags_AlphaBar | ImGuiColorEditFlags_DisplayRGB | ImGuiColorEditFlags_DisplayHex);
            ImGui::NewLine();
        }

        void drawMathEvaluator() {
            static std::vector<long double> mathHistory;
            static std::string lastMathError;
            static auto mathInput = []{
                std::string s;
                s.reserve(0xFFFF);
                std::memset(s.data(), 0x00, s.capacity());

                return s;
            }();
            bool evaluate = false;

            static MathEvaluator mathEvaluator = [&]{
                MathEvaluator evaluator;

                evaluator.registerStandardVariables();
                evaluator.registerStandardFunctions();

                evaluator.setFunction("clear", [&](auto args) -> std::optional<long double> {
                    mathHistory.clear();
                    lastMathError.clear();
                    mathEvaluator.getVariables().clear();
                    mathEvaluator.registerStandardVariables();
                    mathInput.clear();

                    return { };
                }, 0, 0);

                evaluator.setFunction("read", [](auto args) -> std::optional<long double> {
                    u8 value = 0;

                    auto provider = ImHexApi::Provider::get();
                    if (!ImHexApi::Provider::isValid() || !provider->isReadable() || args[0] >= provider->getActualSize())
                        return { };

                    provider->read(args[0], &value, sizeof(u8));

                    return value;
                }, 1, 1);

                evaluator.setFunction("write", [](auto args) -> std::optional<long double> {
                    auto provider = ImHexApi::Provider::get();
                    if (!ImHexApi::Provider::isValid() || !provider->isWritable() || args[0] >= provider->getActualSize())
                        return { };

                    if (args[1] > 0xFF)
                        return { };

                    u8 value = args[1];
                    provider->write(args[0], &value, sizeof(u8));

                    return { };
                }, 2, 2);

                return std::move(evaluator);
            }();

            enum class MathDisplayType { Standard, Scientific, Engineering, Programmer } mathDisplayType;
            if (ImGui::BeginTabBar("##mathFormatTabBar")) {
                if (ImGui::BeginTabItem("hex.builtin.tools.format.standard"_lang)) {
                    mathDisplayType = MathDisplayType::Standard;
                    ImGui::EndTabItem();
                }
                if (ImGui::BeginTabItem("hex.builtin.tools.format.scientific"_lang)) {
                    mathDisplayType = MathDisplayType::Scientific;
                    ImGui::EndTabItem();
                }
                if (ImGui::BeginTabItem("hex.builtin.tools.format.engineering"_lang)) {
                    mathDisplayType = MathDisplayType::Engineering;
                    ImGui::EndTabItem();
                }
                if (ImGui::BeginTabItem("hex.builtin.tools.format.programmer"_lang)) {
                    mathDisplayType = MathDisplayType::Programmer;
                    ImGui::EndTabItem();
                }

                ImGui::EndTabBar();
            }

            if (ImGui::BeginTable("##mathWrapper", 3)) {
                ImGui::TableSetupColumn("##keypad", ImGuiTableColumnFlags_WidthFixed | ImGuiTableColumnFlags_NoResize);
                ImGui::TableSetupColumn("##results", ImGuiTableColumnFlags_WidthStretch, 0.666);
                ImGui::TableSetupColumn("##variables", ImGuiTableColumnFlags_WidthStretch, 0.666);

                ImGui::TableNextRow();
                ImGui::TableNextColumn();

                auto buttonSize = ImVec2(3, 2) * ImGui::GetTextLineHeightWithSpacing();

                if (ImGui::Button("Ans", buttonSize)) mathInput += "ans"; ImGui::SameLine();
                if (ImGui::Button("Pi", buttonSize))  mathInput += "pi"; ImGui::SameLine();
                if (ImGui::Button("e", buttonSize)) mathInput += "e"; ImGui::SameLine();
                if (ImGui::Button("CE", buttonSize)) mathInput.clear(); ImGui::SameLine();
                if (ImGui::Button(ICON_FA_BACKSPACE, buttonSize)) mathInput.clear(); ImGui::SameLine();
                ImGui::NewLine();
                switch (mathDisplayType) {
                    case MathDisplayType::Standard:
                    case MathDisplayType::Scientific:
                    case MathDisplayType::Engineering:
                        if (ImGui::Button("x²", buttonSize)) mathInput += "** 2"; ImGui::SameLine();
                        if (ImGui::Button("1/x", buttonSize)) mathInput += "1/"; ImGui::SameLine();
                        if (ImGui::Button("|x|", buttonSize)) mathInput += "abs"; ImGui::SameLine();
                        if (ImGui::Button("exp", buttonSize)) mathInput += "e ** "; ImGui::SameLine();
                        if (ImGui::Button("%", buttonSize)) mathInput += "%"; ImGui::SameLine();
                        break;
                    case MathDisplayType::Programmer:
                        if (ImGui::Button("<<", buttonSize)) mathInput += "<<"; ImGui::SameLine();
                        if (ImGui::Button(">>", buttonSize)) mathInput += ">>"; ImGui::SameLine();
                        if (ImGui::Button("&", buttonSize)) mathInput += "&"; ImGui::SameLine();
                        if (ImGui::Button("|", buttonSize)) mathInput += "|"; ImGui::SameLine();
                        if (ImGui::Button("^", buttonSize)) mathInput += "^"; ImGui::SameLine();
                        break;
                }
                ImGui::NewLine();
                if (ImGui::Button("sqrt", buttonSize)) mathInput += "sqrt"; ImGui::SameLine();
                if (ImGui::Button("(", buttonSize)) mathInput += "("; ImGui::SameLine();
                if (ImGui::Button(")", buttonSize)) mathInput += ")"; ImGui::SameLine();
                if (ImGui::Button("sign", buttonSize)) mathInput += "sign"; ImGui::SameLine();
                if (ImGui::Button("÷", buttonSize)) mathInput += "/"; ImGui::SameLine();
                ImGui::NewLine();
                if (ImGui::Button("xª", buttonSize)) mathInput += "**"; ImGui::SameLine();
                if (ImGui::Button("7", buttonSize)) mathInput += "7"; ImGui::SameLine();
                if (ImGui::Button("8", buttonSize)) mathInput += "8"; ImGui::SameLine();
                if (ImGui::Button("9", buttonSize)) mathInput += "9"; ImGui::SameLine();
                if (ImGui::Button("×", buttonSize)) mathInput += "*"; ImGui::SameLine();
                ImGui::NewLine();
                if (ImGui::Button("log", buttonSize)) mathInput += "log"; ImGui::SameLine();
                if (ImGui::Button("4", buttonSize)) mathInput += "4"; ImGui::SameLine();
                if (ImGui::Button("5", buttonSize)) mathInput += "5"; ImGui::SameLine();
                if (ImGui::Button("6", buttonSize)) mathInput += "6"; ImGui::SameLine();
                if (ImGui::Button("-", buttonSize)) mathInput += "-"; ImGui::SameLine();
                ImGui::NewLine();
                if (ImGui::Button("ln", buttonSize)) mathInput += "ln"; ImGui::SameLine();
                if (ImGui::Button("1", buttonSize)) mathInput += "1"; ImGui::SameLine();
                if (ImGui::Button("2", buttonSize)) mathInput += "2"; ImGui::SameLine();
                if (ImGui::Button("3", buttonSize)) mathInput += "3"; ImGui::SameLine();
                if (ImGui::Button("+", buttonSize)) mathInput += "+"; ImGui::SameLine();
                ImGui::NewLine();
                if (ImGui::Button("lb", buttonSize)) mathInput += "lb"; ImGui::SameLine();
                if (ImGui::Button("x=", buttonSize)) mathInput += "="; ImGui::SameLine();
                if (ImGui::Button("0", buttonSize)) mathInput += "0"; ImGui::SameLine();
                if (ImGui::Button(".", buttonSize)) mathInput += "."; ImGui::SameLine();

                ImGui::PushStyleColor(ImGuiCol_Button, ImGui::GetCustomColorVec4(ImGuiCustomCol_DescButtonHovered));
                ImGui::PushStyleColor(ImGuiCol_ButtonActive, ImGui::GetCustomColorVec4(ImGuiCustomCol_DescButton));
                ImGui::PushStyleColor(ImGuiCol_ButtonHovered, ImGui::GetCustomColorVec4(ImGuiCustomCol_DescButtonActive));
                if (ImGui::Button("=", buttonSize)) evaluate = true; ImGui::SameLine();
                ImGui::PopStyleColor(3);

                ImGui::NewLine();

                ImGui::TableNextColumn();

                if (ImGui::BeginTable("##mathHistory", 1, ImGuiTableFlags_ScrollY | ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg, ImVec2(0, 300))) {
                    ImGui::TableSetupScrollFreeze(0, 1);
                    ImGui::TableSetupColumn("hex.builtin.tools.history"_lang);

                    ImGuiListClipper clipper;
                    clipper.Begin(mathHistory.size());

                    ImGui::TableHeadersRow();
                    while (clipper.Step()) {
                        for (u64 i = clipper.DisplayStart; i < clipper.DisplayEnd; i++) {
                            if (i == 0)
                                ImGui::PushStyleColor(ImGuiCol_Text, ImU32(ImColor(0xA5, 0x45, 0x45)));

                            ImGui::TableNextRow();
                            ImGui::TableNextColumn();

                            switch (mathDisplayType) {
                                case MathDisplayType::Standard:
                                    ImGui::Text("%.3Lf", mathHistory[(mathHistory.size() - 1) - i]);
                                    break;
                                case MathDisplayType::Scientific:
                                    ImGui::Text("%.6Le", mathHistory[(mathHistory.size() - 1) - i]);
                                    break;
                                case MathDisplayType::Engineering:
                                    ImGui::Text("%s", hex::toEngineeringString(mathHistory[(mathHistory.size() - 1) - i]).c_str());
                                    break;
                                case MathDisplayType::Programmer:
                                    ImGui::Text("0x%llX (%llu)",
                                                u64(mathHistory[(mathHistory.size() - 1) - i]),
                                                u64(mathHistory[(mathHistory.size() - 1) - i]));
                                    break;
                            }

                            if (i == 0)
                                ImGui::PopStyleColor();
                        }
                    }

                    clipper.End();

                    ImGui::EndTable();
                }

                ImGui::TableNextColumn();
                if (ImGui::BeginTable("##mathVariables", 2, ImGuiTableFlags_ScrollY | ImGuiTableFlags_Borders | ImGuiTableFlags_RowBg, ImVec2(0, 300))) {
                    ImGui::TableSetupScrollFreeze(0, 1);
                    ImGui::TableSetupColumn("hex.builtin.tools.name"_lang);
                    ImGui::TableSetupColumn("hex.builtin.tools.value"_lang);

                    ImGui::TableHeadersRow();
                    for (const auto &[name, value] : mathEvaluator.getVariables()) {
                        ImGui::TableNextRow();
                        ImGui::TableNextColumn();
                        ImGui::TextUnformatted(name.c_str());

                        ImGui::TableNextColumn();
                        switch (mathDisplayType) {
                            case MathDisplayType::Standard:
                                ImGui::Text("%.3Lf", value);
                                break;
                            case MathDisplayType::Scientific:
                                ImGui::Text("%.6Le", value);
                                break;
                            case MathDisplayType::Engineering:
                                ImGui::Text("%s", hex::toEngineeringString(value).c_str());
                                break;
                            case MathDisplayType::Programmer:
                                ImGui::Text("0x%llX (%llu)", u64(value),  u64(value));
                                break;
                        }
                    }

                    ImGui::EndTable();
                }

                ImGui::EndTable();
            }

            ImGui::PushItemWidth(ImGui::GetContentRegionAvailWidth());
            if (ImGui::InputText("##input", mathInput.data(), mathInput.capacity(), ImGuiInputTextFlags_EnterReturnsTrue | ImGuiInputTextFlags_AutoSelectAll | ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &mathInput)) {
                ImGui::SetKeyboardFocusHere();
                evaluate = true;
            }
            ImGui::PopItemWidth();

            if (!lastMathError.empty())
                ImGui::TextColored(ImColor(0xA00040FF), "%s", hex::format("hex.builtin.tools.error"_lang, lastMathError).c_str());
            else
                ImGui::NewLine();

            if (evaluate) {
                std::optional<long double> result;

                try {
                    result = mathEvaluator.evaluate(mathInput);
                } catch (std::invalid_argument &e) {
                    lastMathError = e.what();
                }

                if (result.has_value()) {
                    mathHistory.push_back(result.value());
                    mathInput.clear();
                    lastMathError.clear();
                }
            }

        }

        void drawBaseConverter() {
            static char buffer[4][0xFFF] = { { '0' }, { '0' }, { '0' }, { '0' } };

            static auto CharFilter = [](ImGuiInputTextCallbackData *data) -> int {
                switch (*static_cast<u32*>(data->UserData)) {
                    case 16: return std::isxdigit(data->EventChar);
                    case 10: return std::isdigit(data->EventChar);
                    case 8:  return std::isdigit(data->EventChar) && data->EventChar < '8';
                    case 2:  return data->EventChar == '0' || data->EventChar == '1';
                    default: return false;
                }
            };

            static auto ConvertBases = [](u8 base) {
                u64 number;

                errno = 0;
                switch (base) {
                    case 16: number = std::strtoull(buffer[1], nullptr, base); break;
                    case 10: number = std::strtoull(buffer[0], nullptr, base); break;
                    case 8:  number = std::strtoull(buffer[2], nullptr, base); break;
                    case 2:  number = std::strtoull(buffer[3], nullptr, base); break;
                    default: return;
                }

                auto base10String   = std::to_string(number);
                auto base16String   = hex::format("0x{0:X}", number);
                auto base8String    = hex::format("{0:#o}", number);
                auto base2String    = hex::toBinaryString(number);

                std::strncpy(buffer[0], base10String.c_str(), sizeof(buffer[0]));
                std::strncpy(buffer[1], base16String.c_str(), sizeof(buffer[1]));
                std::strncpy(buffer[2], base8String.c_str(),  sizeof(buffer[2]));
                std::strncpy(buffer[3], base2String.c_str(),  sizeof(buffer[3]));
            };

            u8 base = 10;
            if (ImGui::InputText("hex.builtin.tools.base_converter.dec"_lang, buffer[0], 20 + 1, ImGuiInputTextFlags_CallbackCharFilter, CharFilter, &base))
                ConvertBases(base);

            base = 16;
            if (ImGui::InputText("hex.builtin.tools.base_converter.hex"_lang, buffer[1], 16 + 1, ImGuiInputTextFlags_CallbackCharFilter, CharFilter, &base))
                ConvertBases(base);

            base = 8;
            if (ImGui::InputText("hex.builtin.tools.base_converter.oct"_lang, buffer[2], 22 + 1, ImGuiInputTextFlags_CallbackCharFilter, CharFilter, &base))
                ConvertBases(base);

            base = 2;
            if (ImGui::InputText("hex.builtin.tools.base_converter.bin"_lang, buffer[3], 64 + 1, ImGuiInputTextFlags_CallbackCharFilter, CharFilter, &base))
                ConvertBases(base);
        }

    }

    void drawPermissionsCalculator() {
        static bool setuid, setgid, sticky;
        static bool r[3], w[3], x[3];

        ImGui::TextUnformatted("hex.builtin.tools.permissions.perm_bits"_lang);
        ImGui::Separator();

        if (ImGui::BeginTable("Permissions", 4, ImGuiTableFlags_Borders)) {
            ImGui::TableSetupScrollFreeze(0, 1);
            ImGui::TableSetupColumn("Special", ImGuiTableColumnFlags_NoSort);
            ImGui::TableSetupColumn("User", ImGuiTableColumnFlags_NoSort);
            ImGui::TableSetupColumn("Group", ImGuiTableColumnFlags_NoSort);
            ImGui::TableSetupColumn("Other", ImGuiTableColumnFlags_NoSort);

            ImGui::TableHeadersRow();

            ImGui::TableNextRow();
            ImGui::TableNextColumn();

            ImGui::Checkbox("setuid", &setuid);
            ImGui::Checkbox("setgid", &setgid);
            ImGui::Checkbox("Sticky bit", &sticky);

            for (u8 i = 0; i < 3; i++) {
                ImGui::TableNextColumn();

                ImGui::PushID(i);
                ImGui::Checkbox("Read", &r[i]);
                ImGui::Checkbox("Write", &w[i]);
                ImGui::Checkbox("Execute", &x[i]);
                ImGui::PopID();
            }

            ImGui::EndTable();
        }

        ImGui::NewLine();
        ImGui::TextUnformatted("hex.builtin.tools.permissions.absolute"_lang);
        ImGui::Separator();

        auto result = hex::format("{}{}{}{}",
                                  (setuid << 2) | (setgid << 1) | (sticky << 0),
                                  (r[0] << 2) | (w[0] << 1) | (x[0] << 0),
                                  (r[1] << 2) | (w[1] << 1) | (x[1] << 0),
                                  (r[2] << 2) | (w[2] << 1) | (x[2] << 0));
        ImGui::InputText("##permissions_absolute", result.data(), result.size(), ImGuiInputTextFlags_ReadOnly);

        ImGui::NewLine();

        static const auto WarningColor = ImColor(0.92F, 0.25F, 0.2F, 1.0F);
        if (setuid && !x[0])
            ImGui::TextColored(WarningColor, "%s", static_cast<const char*>("hex.builtin.tools.permissions.setuid_error"_lang));
        if (setgid && !x[1])
            ImGui::TextColored(WarningColor, "%s", static_cast<const char*>("hex.builtin.tools.permissions.setgid_error"_lang));
        if (sticky && !x[2])
            ImGui::TextColored(WarningColor, "%s", static_cast<const char*>("hex.builtin.tools.permissions.sticky_error"_lang));

    }

    void drawFileUploader() {
        struct UploadedFile {
            std::string fileName, link, size;
        };

        static hex::Net net;
        static std::future<Response<std::string>> uploadProcess;
        static std::filesystem::path currFile;
        static std::vector<UploadedFile> links;

        bool uploading = uploadProcess.valid() && uploadProcess.wait_for(0s) != std::future_status::ready;

        ImGui::Header("hex.builtin.tools.file_uploader.control"_lang, true);
        if (!uploading) {
            if (ImGui::Button("hex.builtin.tools.file_uploader.upload"_lang)) {
                hex::openFileBrowser("hex.builtin.tools.file_uploader.done"_lang, DialogMode::Open, { }, [&](auto path){
                    uploadProcess = net.uploadFile("https://api.anonfiles.com/upload", path);
                    currFile = path;
                });
            }
        } else {
            if (ImGui::Button("hex.common.cancel"_lang)) {
                net.cancel();
            }
        }

        ImGui::SameLine();

        ImGui::ProgressBar(net.getProgress(), ImVec2(0, 0), uploading ? nullptr : "Done!");

        ImGui::Header("hex.builtin.tools.file_uploader.recent"_lang);

        if (ImGui::BeginTable("##links", 3, ImGuiTableFlags_ScrollY | ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable | ImGuiTableFlags_RowBg, ImVec2(0, 200))) {
            ImGui::TableSetupScrollFreeze(0, 1);
            ImGui::TableSetupColumn("hex.common.file"_lang);
            ImGui::TableSetupColumn("hex.common.link"_lang);
            ImGui::TableSetupColumn("hex.common.size"_lang);
            ImGui::TableHeadersRow();

            ImGuiListClipper clipper;
            clipper.Begin(links.size());

            while (clipper.Step()) {
                for (s32 i = clipper.DisplayEnd - 1; i >= clipper.DisplayStart; i--) {
                    auto &[fileName, link, size] = links[i];

                    ImGui::TableNextRow();
                    ImGui::TableNextColumn();
                    ImGui::TextUnformatted(fileName.c_str());

                    ImGui::TableNextColumn();
                    if (ImGui::Hyperlink(link.c_str())) {
                        if (ImGui::GetMergedKeyModFlags() == ImGuiKeyModFlags_Ctrl)
                            hex::openWebpage(link);
                        else
                            ImGui::SetClipboardText(link.c_str());
                    }

                    ImGui::InfoTooltip("hex.builtin.tools.file_uploader.tooltip"_lang);

                    ImGui::TableNextColumn();
                    ImGui::TextUnformatted(size.c_str());
                }
            }

            clipper.End();

            ImGui::EndTable();
        }

        if (uploadProcess.valid() && uploadProcess.wait_for(0s) == std::future_status::ready) {
            auto response = uploadProcess.get();
            if (response.code == 200) {
                try {
                    auto json = nlohmann::json::parse(response.body);
                    links.push_back({
                        currFile.filename().string(),
                        json["data"]["file"]["url"]["short"],
                        json["data"]["file"]["metadata"]["size"]["readable"]
                    });
                } catch (...) {
                    View::showErrorPopup("hex.builtin.tools.file_uploader.invalid_response"_lang);
                }
            } else if (response.code == 0) {
                // Canceled by user, no action needed
            } else View::showErrorPopup(hex::format("hex.builtin.tools.file_uploader.error"_lang, response.code));

            uploadProcess = { };
            currFile.clear();
        }
    }

    void drawWikiExplainer() {
        static hex::Net net;

        static std::string resultTitle, resultExtract;
        static std::future<Response<std::string>> searchProcess;
        static bool extendedSearch = false;

        static auto searchString = []{
            std::string s;
            s.reserve(0xFFFF);
            std::memset(s.data(), 0x00, s.capacity());

            return s;
        }();

        constexpr static auto WikipediaApiUrl = "https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&explaintext&redirects=10&formatversion=2";

        ImGui::Header("hex.builtin.tools.wiki_explain.control"_lang, true);

        bool startSearch;

        startSearch = ImGui::InputText("##search", searchString.data(), searchString.capacity(), ImGuiInputTextFlags_EnterReturnsTrue | ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &searchString);
        ImGui::SameLine();

        ImGui::BeginDisabled(searchProcess.valid() && searchProcess.wait_for(0s) != std::future_status::ready || searchString.empty());
            startSearch = ImGui::Button("hex.builtin.tools.wiki_explain.search"_lang) || startSearch;
        ImGui::EndDisabled();

        if (startSearch && !searchString.empty()) {
            searchProcess = net.getString(WikipediaApiUrl + "&exintro"s + "&titles="s + net.encode(searchString));
        }

        ImGui::Header("hex.builtin.tools.wiki_explain.results"_lang);

        if (ImGui::BeginChild("##summary", ImVec2(0, 300), true)) {
            if (!resultTitle.empty() && !resultExtract.empty()) {
                ImGui::HeaderColored(resultTitle.c_str(), ImGui::GetCustomColorVec4(ImGuiCustomCol_Highlight),true);
                ImGui::TextWrapped("%s", resultExtract.c_str());
            }
        }
        ImGui::EndChild();

        if (searchProcess.valid() && searchProcess.wait_for(0s) == std::future_status::ready) {
            try {
                auto response = searchProcess.get();
                if (response.code != 200) throw std::runtime_error("Invalid response");

                auto json = nlohmann::json::parse(response.body);

                resultTitle = json["query"]["pages"][0]["title"];
                resultExtract = json["query"]["pages"][0]["extract"];

                if (!extendedSearch && resultExtract.ends_with(':')) {
                    extendedSearch = true;
                    searchProcess = net.getString(WikipediaApiUrl + "&titles="s + net.encode(searchString));
                    resultTitle.clear();
                    resultExtract.clear();
                } else {
                    extendedSearch = false;
                    searchString.clear();
                }
            } catch (...) {
                resultTitle.clear();
                resultExtract.clear();
                extendedSearch = false;
                searchProcess = { };

                resultTitle = "???";
                resultExtract = "hex.builtin.tools.wiki_explain.invalid_response"_lang.get();
            }
        }
    }


    void drawFileToolShredder() {
        static bool shredding = false;
        static auto selectedFile = []{ std::string s; s.reserve(0x1000); return s; }();
        static bool fastMode = false;

        ImGui::TextUnformatted("hex.builtin.tools.file_tools.shredder.warning"_lang);
        ImGui::NewLine();

        if (ImGui::BeginChild("settings", { 0, ImGui::GetTextLineHeightWithSpacing() * 4 }, true, ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoScrollWithMouse)) {
            ImGui::BeginDisabled(shredding);
            {
                ImGui::TextUnformatted("hex.builtin.tools.file_tools.shredder.input"_lang);
                ImGui::SameLine();
                ImGui::InputText("##path", selectedFile.data(), selectedFile.capacity(), ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &selectedFile);
                ImGui::SameLine();
                if (ImGui::Button("...")) {
                    hex::openFileBrowser("hex.builtin.tools.file_tools.shredder.picker"_lang, DialogMode::Open, {}, [](const std::string &path) {
                        selectedFile = path;
                    });
                }

                ImGui::Checkbox("hex.builtin.tools.file_tools.shredder.fast"_lang, &fastMode);
            }
            ImGui::EndDisabled();
        }
        ImGui::EndChild();

        if (shredding)
            ImGui::TextSpinner("hex.builtin.tools.file_tools.shredder.shredding"_lang);
        else {
            ImGui::BeginDisabled(selectedFile.empty());
            {
                if (ImGui::Button("hex.builtin.tools.file_tools.shredder.shred"_lang)) {
                    shredding = true;

                    std::thread([]{
                        ON_SCOPE_EXIT { shredding = false; selectedFile.clear(); };
                        File file(selectedFile, File::Mode::Write);

                        if (!file.isValid()) {
                            View::showErrorPopup("hex.builtin.tools.file_tools.shredder.error.open"_lang);
                            return;
                        }

                        std::vector<std::array<u8, 3>> overwritePattern;
                        if (fastMode) {
                            /* Should be sufficient for modern disks */
                            overwritePattern.push_back({ 0x00, 0x00, 0x00 });
                            overwritePattern.push_back({ 0xFF, 0xFF, 0xFF });
                        }
                        else {
                            /* Gutmann's method. Secure for magnetic storage */
                            std::random_device rd;
                            std::uniform_int_distribution<u8> dist(0x00, 0xFF);

                            /* Fill fixed patterns */
                            overwritePattern = {
                                    {}, {}, {}, {},
                                    { 0x55, 0x55, 0x55 }, { 0xAA, 0xAA, 0xAA }, { 0x92, 0x49, 0x24 }, { 0x49, 0x24, 0x92 },
                                    { 0x24, 0x92, 0x49 }, { 0x00, 0x00, 0x00 }, { 0x11, 0x11, 0x11 }, { 0x22, 0x22, 0x22 },
                                    { 0x33, 0x33, 0x44 }, { 0x55, 0x55, 0x55 }, { 0x66, 0x66, 0x66 }, { 0x77, 0x77, 0x77 },
                                    { 0x88, 0x88, 0x88 }, { 0x99, 0x99, 0x99 }, { 0xAA, 0xAA, 0xAA }, { 0xBB, 0xBB, 0xBB },
                                    { 0xCC, 0xCC, 0xCC }, { 0xDD, 0xDD, 0xDD }, { 0xEE, 0xEE, 0xEE }, { 0xFF, 0xFF, 0xFF },
                                    { 0x92, 0x49, 0x24 }, { 0x49, 0x24, 0x92 }, { 0x24, 0x92, 0x49 }, { 0x6D, 0xB6, 0xDB },
                                    { 0xB6, 0xDB, 0x6D }, { 0xBD, 0x6D, 0xB6 },
                                    {}, {}, {}, {}
                            };

                            /* Fill random patterns */
                            for (u8 i = 0; i < 4; i++)
                                overwritePattern[i] = { dist(rd), dist(rd), dist(rd) };
                            for (u8 i = 0; i < 4; i++)
                                overwritePattern[overwritePattern.size() - 1 - i] = { dist(rd), dist(rd), dist(rd) };
                        }

                        size_t fileSize = file.getSize();
                        for (const auto &pattern : overwritePattern) {
                            for (u64 offset = 0; offset < fileSize; offset += 3) {
                                file.write(pattern.data(), std::min<u64>(pattern.size(), fileSize - offset));
                            }

                            file.flush();
                        }

                        file.remove();

                        View::showMessagePopup("hex.builtin.tools.file_tools.shredder.success"_lang);

                    }).detach();
                }
            }
            ImGui::EndDisabled();
        }
    }

    void drawFileToolSplitter() {
        std::array sizeText = {
                (const char*)"hex.builtin.tools.file_tools.splitter.sizes.5_75_floppy"_lang,
                (const char*)"hex.builtin.tools.file_tools.splitter.sizes.3_5_floppy"_lang,
                (const char*)"hex.builtin.tools.file_tools.splitter.sizes.zip100"_lang,
                (const char*)"hex.builtin.tools.file_tools.splitter.sizes.zip200"_lang,
                (const char*)"hex.builtin.tools.file_tools.splitter.sizes.cdrom650"_lang,
                (const char*)"hex.builtin.tools.file_tools.splitter.sizes.cdrom700"_lang,
                (const char*)"hex.builtin.tools.file_tools.splitter.sizes.fat32"_lang,
                (const char*)"hex.builtin.tools.file_tools.splitter.sizes.custom"_lang
        };
        std::array<u64, sizeText.size()> sizes = {
                1200_KiB,
                1400_KiB,
                100_MiB,
                200_MiB,
                650_MiB,
                700_MiB,
                4_GiB,
                1
        };

        static bool splitting =  false;
        static auto selectedFile = []{ std::string s; s.reserve(0x1000); return s; }();
        static auto baseOutputPath = []{ std::string s; s.reserve(0x1000); return s; }();
        static u64 splitSize = sizes[0];
        static int selectedItem = 0;

        if (ImGui::BeginChild("split_settings", { 0, ImGui::GetTextLineHeightWithSpacing() * 7 }, true, ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoScrollWithMouse)) {
            ImGui::BeginDisabled(splitting);
            {
                ImGui::TextUnformatted("hex.builtin.tools.file_tools.splitter.input"_lang);
                ImGui::SameLine();
                ImGui::InputText("##path", selectedFile.data(), selectedFile.capacity(), ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &selectedFile);
                ImGui::SameLine();
                if (ImGui::Button("...##input")) {
                    hex::openFileBrowser("hex.builtin.tools.file_tools.splitter.picker.input"_lang, DialogMode::Open, {}, [](const std::string &path) {
                        selectedFile = path;
                    });
                }

                ImGui::TextUnformatted("hex.builtin.tools.file_tools.splitter.output"_lang);
                ImGui::SameLine();
                ImGui::InputText("##base_path", baseOutputPath.data(), baseOutputPath.capacity(), ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &baseOutputPath);
                ImGui::SameLine();
                if (ImGui::Button("...##output")) {
                    hex::openFileBrowser("hex.builtin.tools.file_tools.splitter.picker.output"_lang, DialogMode::Save, {}, [](const std::string &path) {
                        baseOutputPath = path;
                    });
                }

                ImGui::Separator();

                if (ImGui::Combo("###part_size", &selectedItem, sizeText.data(), sizeText.size())) {
                    splitSize = sizes[selectedItem];
                }

            }
            ImGui::EndDisabled();
            ImGui::BeginDisabled(splitting || selectedItem != sizes.size() - 1);
            {
                ImGui::InputScalar("###custom_size", ImGuiDataType_U64, &splitSize);
                ImGui::SameLine();
                ImGui::TextUnformatted("Bytes");
            }
            ImGui::EndDisabled();
        }
        ImGui::EndChild();

        ImGui::BeginDisabled(selectedFile.empty() || baseOutputPath.empty() || splitSize == 0);
        {
            if (splitting)
                ImGui::TextSpinner("hex.builtin.tools.file_tools.splitter.splitting"_lang);
            else {
                if (ImGui::Button("hex.builtin.tools.file_tools.splitter.split"_lang)) {
                    splitting = true;

                    std::thread([]{
                        ON_SCOPE_EXIT { splitting = false; selectedFile.clear(); baseOutputPath.clear(); };
                        File file(selectedFile, File::Mode::Read);

                        if (!file.isValid()) {
                            View::showErrorPopup("hex.builtin.tools.file_tools.splitter.error.open"_lang);
                            return;
                        }

                        if (file.getSize() < splitSize) {
                            View::showErrorPopup("hex.builtin.tools.file_tools.splitter.error.size"_lang);
                            return;
                        }

                        u32 index = 1;
                        for (u64 offset = 0; offset < file.getSize(); offset += splitSize) {
                            File partFile(baseOutputPath + hex::format(".{:05}", index), File::Mode::Create);

                            if (!partFile.isValid()) {
                                View::showErrorPopup(hex::format("hex.builtin.tools.file_tools.splitter.error.create"_lang, index));
                                return;
                            }

                            constexpr auto BufferSize = 0xFF'FFFF;
                            for (u64 partOffset = 0; partOffset < splitSize; partOffset += BufferSize) {
                                partFile.write(file.readBytes(std::min<u64>(BufferSize, splitSize - partOffset)));
                                partFile.flush();
                            }

                            index++;
                        }

                        View::showMessagePopup("hex.builtin.tools.file_tools.splitter.success"_lang);
                    }).detach();
                }
            }
        }
        ImGui::EndDisabled();
    }

    void drawFileToolCombiner() {
        static bool combining = false;
        static std::vector<std::string> files;
        static auto outputPath = []{ std::string s; s.reserve(0x1000); return s; }();
        static s32 selectedIndex;

        if (ImGui::BeginTable("files_table", 2, ImGuiTableFlags_SizingStretchProp)) {
            ImGui::TableSetupColumn("file list", ImGuiTableColumnFlags_NoHeaderLabel, 10);
            ImGui::TableSetupColumn("buttons", ImGuiTableColumnFlags_NoHeaderLabel, 1);
            ImGui::TableNextRow();
            ImGui::TableNextColumn();

            if (ImGui::BeginListBox("##files", { -FLT_MIN, 10 * ImGui::GetTextLineHeightWithSpacing() })) {

                s32 index = 0;
                for (auto &file : files) {
                    if (ImGui::Selectable(std::filesystem::path(file).filename().string().c_str(), index == selectedIndex))
                        selectedIndex = index;
                    index++;
                }

                ImGui::EndListBox();
            }

            ImGui::TableNextColumn();

            ImGui::BeginDisabled(selectedIndex <= 0) ;
            {
                if (ImGui::ArrowButton("move_up", ImGuiDir_Up)) {
                    std::iter_swap(files.begin() + selectedIndex, files.begin() + selectedIndex - 1);
                    selectedIndex--;
                }
            }
            ImGui::EndDisabled();

            ImGui::BeginDisabled(files.empty() || selectedIndex >= files.size() - 1) ;
            {
                if (ImGui::ArrowButton("move_down", ImGuiDir_Down)) {
                    std::iter_swap(files.begin() + selectedIndex, files.begin() + selectedIndex + 1);
                    selectedIndex++;
                }
            }
            ImGui::EndDisabled();

            ImGui::TableNextRow();
            ImGui::TableNextColumn();

            ImGui::BeginDisabled(combining);
            {
                if (ImGui::Button("hex.builtin.tools.file_tools.combiner.add"_lang)) {
                    hex::openFileBrowser("hex.builtin.tools.file_tools.combiner.add.picker"_lang, DialogMode::Open, {}, [](const std::string &path) {
                        files.push_back(path);
                    });
                }
                ImGui::SameLine();
                if (ImGui::Button("hex.builtin.tools.file_tools.combiner.delete"_lang)) {
                    files.erase(files.begin() + selectedIndex);
                    selectedIndex--;
                }
                ImGui::SameLine();
                if (ImGui::Button("hex.builtin.tools.file_tools.combiner.clear"_lang)) {
                    files.clear();
                }
            }
            ImGui::EndDisabled();

            ImGui::EndTable();
        }

        ImGui::BeginDisabled(combining);
        {
            ImGui::TextUnformatted("hex.builtin.tools.file_tools.combiner.output"_lang);
            ImGui::SameLine();
            ImGui::InputText("##output_path", outputPath.data(), outputPath.capacity(), ImGuiInputTextFlags_CallbackEdit, ImGui::UpdateStringSizeCallback, &outputPath);
            ImGui::SameLine();
            if (ImGui::Button("...")) {
                hex::openFileBrowser("hex.builtin.tools.file_tools.combiner.output.picker"_lang, DialogMode::Save, {}, [](const std::string &path) {
                    outputPath = path;
                });
            }
        }
        ImGui::EndDisabled();

        ImGui::BeginDisabled(files.empty() || outputPath.empty());
        {
            if (combining)
                ImGui::TextSpinner("hex.builtin.tools.file_tools.combiner.combining"_lang);
            else {
                if (ImGui::Button("hex.builtin.tools.file_tools.combiner.combine"_lang)) {
                    combining = true;

                    std::thread([]{
                        ON_SCOPE_EXIT { combining = false; };

                        File output(outputPath, File::Mode::Create);

                        if (!output.isValid()) {
                            View::showErrorPopup("hex.builtin.tools.file_tools.combiner.error.open_output"_lang);
                            return;
                        }

                        for (const auto &file : files) {
                            File input(file, File::Mode::Read);

                            if (!input.isValid()) {
                                View::showErrorPopup(hex::format("hex.builtin.tools.file_tools.combiner.open_input"_lang, std::filesystem::path(file).filename().string()));
                                return;
                            }

                            constexpr auto BufferSize = 0xFF'FFFF;
                            auto inputSize = input.getSize();
                            for (u64 inputOffset = 0; inputOffset < inputSize; inputOffset += BufferSize) {
                                output.write(input.readBytes(std::min<u64>(BufferSize, inputSize - inputOffset)));
                                output.flush();
                            }
                        }

                        files.clear();
                        selectedIndex = 0;
                        outputPath.clear();

                        View::showMessagePopup("hex.builtin.tools.file_tools.combiner.success"_lang);
                    }).detach();
                }
            }
        }
        ImGui::EndDisabled();

    }

    void drawFileTools() {

        if (ImGui::BeginTabBar("file_tools_tabs")) {

            if (ImGui::BeginTabItem("hex.builtin.tools.file_tools.shredder"_lang)) {
                drawFileToolShredder();
                ImGui::EndTabItem();
            }

            if (ImGui::BeginTabItem("hex.builtin.tools.file_tools.splitter"_lang)) {
                drawFileToolSplitter();
                ImGui::EndTabItem();
            }

            if (ImGui::BeginTabItem("hex.builtin.tools.file_tools.combiner"_lang)) {
                drawFileToolCombiner();
                ImGui::EndTabItem();
            }

            ImGui::EndTabBar();
        }
    }

    void registerToolEntries() {
        ContentRegistry::Tools::add("hex.builtin.tools.demangler",         drawDemangler);
        ContentRegistry::Tools::add("hex.builtin.tools.ascii_table",       drawASCIITable);
        ContentRegistry::Tools::add("hex.builtin.tools.regex_replacer",    drawRegexReplacer);
        ContentRegistry::Tools::add("hex.builtin.tools.color",             drawColorPicker);
        ContentRegistry::Tools::add("hex.builtin.tools.calc",              drawMathEvaluator);
        ContentRegistry::Tools::add("hex.builtin.tools.base_converter",    drawBaseConverter);
        ContentRegistry::Tools::add("hex.builtin.tools.permissions",       drawPermissionsCalculator);
        ContentRegistry::Tools::add("hex.builtin.tools.file_uploader",     drawFileUploader);
        ContentRegistry::Tools::add("hex.builtin.tools.wiki_explain",      drawWikiExplainer);
        ContentRegistry::Tools::add("hex.builtin.tools.file_tools",        drawFileTools);
    }

}