// MassBuilderSaveTool
// Copyright (C) 2021-2022 Guillaume Jacquemin
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

#include <algorithm>

#include <Corrade/Utility/Format.h>
#include <Corrade/Utility/Path.h>

#include <SDL_messagebox.h>

#include "../FontAwesome/IconsFontAwesome5.h"
#include "../Maps/LastMissionId.h"
#include "../Maps/StoryProgress.h"

#include "SaveTool.h"

void SaveTool::drawManager() {
    ImGui::SetNextWindowPos({0.0f, ImGui::GetItemRectSize().y}, ImGuiCond_Always);
    ImGui::SetNextWindowSize({Float(windowSize().x()), Float(windowSize().y()) - ImGui::GetItemRectSize().y},
                             ImGuiCond_Always);
    if(!ImGui::Begin("##MainWindow", nullptr,
                     ImGuiWindowFlags_NoDecoration|ImGuiWindowFlags_NoMove|
                     ImGuiWindowFlags_NoBackground|ImGuiWindowFlags_NoBringToFrontOnFocus))
    {
        ImGui::End();
        return;
    }

    drawAlignedText("Current profile: %s (%s)",
                    _currentProfile->companyName().data(),
                    _currentProfile->isDemo() ? "demo" : "full game");
    ImGui::SameLine();
    if(ImGui::Button(ICON_FA_ARROW_LEFT " Back to profile manager")) {
        _currentProfile = nullptr;
        _massManager.reset();
        _fileWatcher.reset();
        _uiState = UiState::ProfileManager;
    }

    if(ImGui::BeginChild("##ProfileInfo",
                         {ImGui::GetContentRegionAvail().x * 0.60f, 0.0f},
                         true, ImGuiWindowFlags_MenuBar))
    {
        if(ImGui::BeginMenuBar()) {
            ImGui::TextUnformatted("Profile information");
            ImGui::EndMenuBar();
        }

        if(ImGui::BeginTabBar("##ProfileTabBar")) {
            if(ImGui::BeginTabItem("General info")) {
                drawGeneralInfo();
                ImGui::EndTabItem();
            }

            if(ImGui::BeginTabItem("Research inventory")) {
                drawResearchInventory();
                ImGui::EndTabItem();
            }

            ImGui::EndTabBar();
        }

    }
    ImGui::EndChild();

    ImGui::SameLine();

    if(ImGui::BeginChild("##MASSManager", {0.0f, 0.0f},
                         true, ImGuiWindowFlags_MenuBar))
    {
        if(ImGui::BeginMenuBar()) {
            ImGui::TextUnformatted("M.A.S.S. management");
            drawHelpMarker("To move, import, or export builds, drag-and-drop them.");
            ImGui::EndMenuBar();
        }

        drawMassManager();
    }
    ImGui::EndChild();

    ImGui::End();
}

auto SaveTool::drawIntEditPopup(int* value_to_edit, int max) -> bool {
    bool apply = false;
    if(ImGui::BeginPopup("int_edit")) {
        ImGui::Text("Please enter a value between 0 and %i:", max);

        ImGui::AlignTextToFramePadding();
        drawHelpMarker("You can either drag the widget left or right to change the value,\n"
                       "or click on it while holding Ctrl to edit the value directly.");
        ImGui::SameLine();
        drawUnsafeWidget([](auto... args){ return ImGui::SliderInt("", args...); },
                         value_to_edit, 0, max, "%d", ImGuiSliderFlags_AlwaysClamp);
        ImGui::SameLine();
        if(drawUnsafeWidget([]{ return ImGui::Button("Apply"); })) {
            apply = true;
            ImGui::CloseCurrentPopup();
        }

        ImGui::EndPopup();
    }

    return apply;
}

auto SaveTool::drawRenamePopup(Containers::ArrayView<char> name_view) -> bool {
    bool apply = false;
    if(ImGui::BeginPopup("name_edit")) {
        ImGui::TextUnformatted("Please enter a new name. Conditions:");

        std::size_t len = std::strlen(name_view.data());

        ImGui::BulletText("Length between 6 and 32 characters included. %s",
                          (len >= 6 && len <= 32) ? ICON_FA_CHECK : ICON_FA_TIMES);

        ImGui::BulletText("Only A-Z, a-z, 0-9, -, and whitespaces. " ICON_FA_CHECK);

        ImGui::BulletText("No whitespace at the beginning or end. %s",
                          (name_view[0] != ' ' && name_view[len - 1] != ' ') ? ICON_FA_CHECK : ICON_FA_TIMES);

        static auto callback = [](ImGuiInputTextCallbackData* data)->int {
            if(data->EventChar < 256 && std::strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789- ", char(data->EventChar))) {
                return 0;
            }
            return 1;
        };

        drawUnsafeWidget([](auto... args){ return ImGui::InputText("", args...); },
                         name_view.data(), name_view.size(),
                         ImGuiInputTextFlags_CallbackCharFilter,
                         callback, nullptr);
        ImGui::SameLine();
        GameState game_state = _gameState;
        if(game_state != GameState::NotRunning ||
           !(len >= 6 && len <= 32)            ||
           !(name_view[0] != ' ' && name_view[len - 1] != ' '))
        {
            ImGui::BeginDisabled();
        }

        if(ImGui::Button("Apply")) {
            apply = true;
            ImGui::CloseCurrentPopup();
        }

        if(game_state != GameState::NotRunning ||
           !(len >= 6 && len <= 32)            ||
           !(name_view[0] != ' ' && name_view[len - 1] != ' '))
        {
            ImGui::EndDisabled();
        }

        ImGui::EndPopup();
    }
    return apply;
}

void SaveTool::drawGeneralInfo() {
    if(!_currentProfile) {
        return;
    }

    ImGui::Text("Credits: %i", _currentProfile->credits());

    auto it = std::find_if(story_progress.begin(), story_progress.end(),
                           [this](const StoryProgressPoint& p){ return p.id == _currentProfile->storyProgress(); });
    if(it != story_progress.end())
    {
        ImGui::TextUnformatted("Story progress:");
        ImGui::SameLine(0.0f, ImGui::GetStyle().ItemSpacing.x / 4.0f);
        if(!it->after) {
            ImGui::TextWrapped("%s - %s", it->chapter.data(), it->point.data());
        }
        else {
            ImGui::TextWrapped("%s - %s - %s", it->chapter.data(), it->after.data(), it->point.data());
        }
    }
    else {
        ImGui::Text("Story progress: 0x%x", _currentProfile->storyProgress());
    }

    if(mission_id_map.find(_currentProfile->lastMissionId()) != mission_id_map.cend()) {
        ImGui::Text("Last mission: %s", mission_id_map.at(_currentProfile->lastMissionId()).data());
    }
    else if(_currentProfile->lastMissionId() == -1) {
        ImGui::TextUnformatted("Last mission: none");
    }
    else {
        ImGui::Text("Last mission: 0x%x", _currentProfile->lastMissionId());
    }
    drawTooltip("This is the last mission selected in the mission selection screen, not the last mission played.",
                float(windowSize().x()) * 0.35f);

    const Float footer_height_to_reserve = ImGui::GetStyle().ItemSpacing.y + ImGui::GetFrameHeightWithSpacing();
    ImGui::Dummy({ImGui::GetContentRegionAvail().x, ImGui::GetContentRegionAvail().y - footer_height_to_reserve});

    ImGui::Separator();

    static Containers::StaticArray<33, char> name_buf{ValueInit};
    if(drawUnsafeWidget([]{ return ImGui::Button("Rename company"); })) {
        for(auto& c : name_buf) {
            c = '\0';
        }
        std::strncpy(name_buf.data(), _currentProfile->companyName().data(), 32);
        ImGui::OpenPopup("name_edit");
    }
    if(drawRenamePopup(name_buf)) {
        if(!_currentProfile->renameCompany(name_buf.data())) {
            _queue.addToast(Toast::Type::Error, _currentProfile->lastError());
        }
    }

    if(!_cheatMode) {
        return;
    }

    ImGui::SameLine();

    static Int credits;
    if(drawUnsafeWidget([]{ return ImGui::Button("Edit credits"); })) {
        credits = _currentProfile->credits();
        ImGui::OpenPopup("int_edit");
    }
    if(drawIntEditPopup(&credits, 20000000)) {
        if(!_currentProfile->setCredits(credits)) {
            _queue.addToast(Toast::Type::Error, _currentProfile->lastError());
        }
    }

    ImGui::SameLine();

    if(drawUnsafeWidget([]{ return ImGui::Button("Change story progression"); })) {
        ImGui::OpenPopup("StoryProgressMenu");
    }
    drawTooltip("Story progress directly affects unlocked levels.");
    if(ImGui::BeginPopup("StoryProgressMenu")) {
        if(_gameState != GameState::NotRunning) {
            ImGui::CloseCurrentPopup();
        }
        for(const auto& sp : story_progress) {
            if(ImGui::BeginMenu(sp.chapter.data())) {
                if(!sp.after) {
                    if(ImGui::MenuItem(sp.point.data())) {
                        if(!_currentProfile->setStoryProgress(sp.id)) {
                            _queue.addToast(Toast::Type::Error, _currentProfile->lastError());
                        }
                    }
                }
                else {
                    if(ImGui::BeginMenu(sp.after.data())) {
                        if(ImGui::MenuItem(sp.point.data())) {
                            if(!_currentProfile->setStoryProgress(sp.id)) {
                                _queue.addToast(Toast::Type::Error, _currentProfile->lastError());
                            }
                        }
                        ImGui::EndMenu();
                    }
                }
                ImGui::EndMenu();
            }
        }
        ImGui::EndPopup();
    }
}

void SaveTool::drawResearchInventory() {
    if(!_currentProfile) {
        return;
    }

    if(ImGui::BeginTable("##ResearchInventoryTable", 4,
                         ImGuiTableFlags_BordersOuter|ImGuiTableFlags_ScrollY|ImGuiTableFlags_BordersInnerH))
    {
        ImGui::TableSetupColumn("##Tier", ImGuiTableColumnFlags_WidthFixed);
        ImGui::TableSetupColumn("##Name", ImGuiTableColumnFlags_WidthFixed);
        ImGui::TableSetupColumn("##Value", ImGuiTableColumnFlags_WidthStretch);
        ImGui::TableSetupColumn("##Edit", ImGuiTableColumnFlags_WidthFixed);

        ImGui::TableNextRow(ImGuiTableRowFlags_Headers);
        ImGui::TableSetColumnIndex(1);
        ImGui::Text("Engine materials");

        drawMaterialRow("Verse steel", 1,
                        [this]{ return _currentProfile->verseSteel(); },
                        [this](Int amount){ return _currentProfile->setVerseSteel(amount); });
        drawMaterialRow("Undinium", 2,
                        [this]{ return _currentProfile->undinium(); },
                        [this](Int amount){ return _currentProfile->setUndinium(amount); });
        drawMaterialRow("Necrium alloy", 3,
                        [this]{ return _currentProfile->necriumAlloy(); },
                        [this](Int amount){ return _currentProfile->setNecriumAlloy(amount); });
        drawMaterialRow("Lunarite", 4,
                        [this]{ return _currentProfile->lunarite(); },
                        [this](Int amount){ return _currentProfile->setLunarite(amount); });
        drawMaterialRow("Asterite", 5,
                        [this]{ return _currentProfile->asterite(); },
                        [this](Int amount){ return _currentProfile->setAsterite(amount); });
        drawUnavailableMaterialRow("Hallite fragma", 6);
        drawUnavailableMaterialRow("Unnoctinium", 7);

        ImGui::TableNextRow(ImGuiTableRowFlags_Headers);
        ImGui::TableSetColumnIndex(1);
        ImGui::Text("OS materials");

        drawMaterialRow("Ednil", 1,
                        [this]{ return _currentProfile->ednil(); },
                        [this](Int amount){ return _currentProfile->setEdnil(amount); });
        drawMaterialRow("Nuflalt", 2,
                        [this]{ return _currentProfile->nuflalt(); },
                        [this](Int amount){ return _currentProfile->setNuflalt(amount); });
        drawMaterialRow("Aurelene", 3,
                        [this]{ return _currentProfile->aurelene(); },
                        [this](Int amount){ return _currentProfile->setAurelene(amount); });
        drawMaterialRow("Soldus", 4,
                        [this]{ return _currentProfile->soldus(); },
                        [this](Int amount){ return _currentProfile->setSoldus(amount); });
        drawMaterialRow("Synthesized N", 5,
                        [this]{ return _currentProfile->synthesisedN(); },
                        [this](Int amount){ return _currentProfile->setSynthesisedN(amount); });
        drawUnavailableMaterialRow("Nanoc", 6);
        drawUnavailableMaterialRow("Abyssillite", 7);

        ImGui::TableNextRow(ImGuiTableRowFlags_Headers);
        ImGui::TableSetColumnIndex(1);
        ImGui::Text("Architect materials");

        drawMaterialRow("Alcarbonite", 1,
                        [this]{ return _currentProfile->alcarbonite(); },
                        [this](Int amount){ return _currentProfile->setAlcarbonite(amount); });
        drawMaterialRow("Keripehene", 2,
                        [this]{ return _currentProfile->keriphene(); },
                        [this](Int amount){ return _currentProfile->setKeriphene(amount); });
        drawMaterialRow("Nitinol-CM", 3,
                        [this]{ return _currentProfile->nitinolCM(); },
                        [this](Int amount){ return _currentProfile->setNitinolCM(amount); });
        drawMaterialRow("Quarkium", 4,
                        [this]{ return _currentProfile->quarkium(); },
                        [this](Int amount){ return _currentProfile->setQuarkium(amount); });
        drawMaterialRow("Alterene", 5,
                        [this]{ return _currentProfile->alterene(); },
                        [this](Int amount){ return _currentProfile->setAlterene(amount); });
        drawUnavailableMaterialRow("Cosmium", 6);
        drawUnavailableMaterialRow("Purified quarkium", 7);

        ImGui::TableNextRow(ImGuiTableRowFlags_Headers);
        ImGui::TableSetColumnIndex(1);
        ImGui::Text("Quark data");

        drawMaterialRow("Mixed composition", 1,
                        [this]{ return _currentProfile->mixedComposition(); },
                        [this](Int amount){ return _currentProfile->setMixedComposition(amount); });
        drawMaterialRow("Void residue", 2,
                        [this]{ return _currentProfile->voidResidue(); },
                        [this](Int amount){ return _currentProfile->setVoidResidue(amount); });
        drawMaterialRow("Muscular construction", 3,
                        [this]{ return _currentProfile->muscularConstruction(); },
                        [this](Int amount){ return _currentProfile->setMuscularConstruction(amount); });
        drawMaterialRow("Mineral exoskeletology", 4,
                        [this]{ return _currentProfile->mineralExoskeletology(); },
                        [this](Int amount){ return _currentProfile->setMineralExoskeletology(amount); });
        drawMaterialRow("Carbonized skin", 5,
                        [this]{ return _currentProfile->carbonisedSkin(); },
                        [this](Int amount){ return _currentProfile->setCarbonisedSkin(amount); });
        drawUnavailableMaterialRow("Isolated void particle", 6);
        drawUnavailableMaterialRow("Weaponised physiology", 7);

        ImGui::EndTable();
    }
}

template<typename Getter, typename Setter>
void SaveTool::drawMaterialRow(Containers::StringView name, Int tier, Getter getter, Setter setter) {
    static_assert(std::is_same<decltype(getter()), Int>::value, "getter doesn't return an Int, and/or doesn't take zero arguments.");
    static_assert(std::is_same<decltype(setter(0)), bool>::value, "setter doesn't return a bool, and/or doesn't take a single Int as an argument.");

    ImGui::TableNextRow();
    ImGui::TableSetColumnIndex(0);
    ImGui::Text("T%i", tier);
    ImGui::TableSetColumnIndex(1);
    ImGui::TextUnformatted(name.data());
    ImGui::TableSetColumnIndex(2);
    if(getter() != -1) {
        ImGui::Text("%i", getter());
        if(_cheatMode) {
            ImGui::TableSetColumnIndex(3);
            ImGui::PushID(name.data());
            static Int var = 0;
            if(drawUnsafeWidget(ImGui::SmallButton, ICON_FA_EDIT)) {
                (var) = getter();
                ImGui::OpenPopup("int_edit");
            }
            drawTooltip("Edit");
            if(drawIntEditPopup(&(var), 9999)) {
                if(!setter(var)) {
                    _queue.addToast(Toast::Type::Error, _currentProfile->lastError());
                }
            }
            ImGui::PopID();
        }
    }
    else {
        ImGui::TextDisabled("Not found in the save file");
    }
}

void SaveTool::drawUnavailableMaterialRow(Containers::StringView name, Int tier) {
    ImGui::TableNextRow();
    ImGui::TableSetColumnIndex(0);
    ImGui::Text("T%i", tier);
    ImGui::TableSetColumnIndex(1);
    ImGui::TextUnformatted(name.data());
    ImGui::TableSetColumnIndex(2);
    ImGui::TextDisabled("Unavailable as of game version " SUPPORTED_GAME_VERSION);
}

void SaveTool::drawMassManager() {
    if(!_massManager) {
        return;
    }

    static int mass_to_delete = 0;
    static ImGuiID mass_deletion_popup_ID = drawDeleteMassPopup(mass_to_delete);

    if(ImGui::BeginTable("##HangarsTable", 4,
                         ImGuiTableFlags_BordersOuter|ImGuiTableFlags_RowBg|ImGuiTableFlags_ScrollY,
                         {0.0f, ImGui::GetContentRegionAvail().y * 0.45f}))
    {
        ImGui::TableSetupColumn("##Hangar", ImGuiTableColumnFlags_WidthFixed);
        ImGui::TableSetupColumn("##MASSName", ImGuiTableColumnFlags_WidthStretch);
        ImGui::TableSetupColumn("##Active", ImGuiTableColumnFlags_WidthFixed);
        ImGui::TableSetupColumn("##Buttons", ImGuiTableColumnFlags_WidthFixed);

        ImGui::TableSetupScrollFreeze(0, 1);

        ImGui::TableNextRow(ImGuiTableRowFlags_Headers);

        ImGui::TableSetColumnIndex(0);
        ImGui::TextUnformatted("#");

        ImGui::TableSetColumnIndex(1);
        ImGui::TextUnformatted("Name");

        for(int i = 0; i < 32; i++) {
            ImGui::TableNextRow();

            static int drag_drop_index = 0;

            ImGui::TableSetColumnIndex(0);
            ImGui::Selectable(Utility::format("{:.2d}", i + 1).data(),
                              false, ImGuiSelectableFlags_SpanAllColumns|ImGuiSelectableFlags_AllowItemOverlap);
            if(_massManager->hangar(i).state() == Mass::State::Valid &&
               ImGui::BeginDragDropSource(ImGuiDragDropFlags_SourceNoHoldToOpenOthers))
            {
                drag_drop_index = i;
                ImGui::SetDragDropPayload("Mass", &drag_drop_index, sizeof(int));

                ImGui::Text("%s - Hangar %.2d", _massManager->hangar(i).name().data(), i + 1);

                ImGui::EndDragDropSource();
            }
            if(_gameState == GameState::NotRunning && ImGui::BeginDragDropTarget()) {
                if(const ImGuiPayload* payload = ImGui::AcceptDragDropPayload("StagedMass")) {
                    if(payload->DataSize != sizeof(Containers::String)) {
                        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal error",
                                                 "payload->DataSize != sizeof(Containers::String) in SaveTool::drawMassManager()",
                                                 window());
                        exit(EXIT_FAILURE);
                    }

                    Containers::StringView file = *static_cast<Containers::String*>(payload->Data);

                    if(!_massManager->importMass(file, i)) {
                        _queue.addToast(Toast::Type::Error, _massManager->lastError());
                    }
                }
                else if((payload = ImGui::AcceptDragDropPayload("Mass"))) {
                    if(payload->DataSize != sizeof(int)) {
                        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal error",
                                                 "payload->DataSize != sizeof(int) in SaveTool::drawMassManager()",
                                                 window());
                        exit(EXIT_FAILURE);
                    }

                    int index = *(static_cast<int*>(payload->Data));

                    if(!_massManager->moveMass(index, i)) {
                        _queue.addToast(Toast::Type::Error, _massManager->lastError());
                    }
                }

                ImGui::EndDragDropTarget();
            }

            ImGui::TableSetColumnIndex(1);
            switch(_massManager->hangar(i).state()) {
                case Mass::State::Empty:
                    ImGui::TextDisabled("<empty>");
                    break;
                case Mass::State::Invalid:
                    ImGui::TextDisabled("<invalid>");
                    break;
                case Mass::State::Valid:
                    ImGui::TextUnformatted(_massManager->hangar(i).name().data());
                    break;
            }

            if(i == _currentProfile->activeFrameSlot()) {
                ImGui::TableSetColumnIndex(2);
                ImGui::TextUnformatted(ICON_FA_CHECK);
                drawTooltip("This is the currently active frame slot.");
            }

            if(_massManager->hangar(i).state() != Mass::State::Empty) {
                ImGui::TableSetColumnIndex(3);
                ImGui::PushID(i);
                if(_massManager->hangar(i).state() == Mass::State::Valid) {
                    if(ImGui::SmallButton(ICON_FA_SEARCH)) {
                        _currentMass = &_massManager->hangar(i);
                        _uiState = UiState::MassViewer;
                    }
                    drawTooltip("Open in M.A.S.S. editor");
                }
                else{
                    ImGui::PushStyleVar(ImGuiStyleVar_Alpha, 0.0f);
                    ImGui::SmallButton(ICON_FA_SEARCH);
                    ImGui::PopStyleVar();
                }
                ImGui::SameLine(0.0f, 2.0f);
                if(drawUnsafeWidget(ImGui::SmallButton, ICON_FA_TRASH_ALT)) {
                    mass_to_delete = i;
                    ImGui::OpenPopup(mass_deletion_popup_ID);
                }
                drawTooltip("Delete");
                ImGui::PopID();
            }
        }

        ImGui::EndTable();
    }

    drawDeleteMassPopup(mass_to_delete);

    static ImGuiID staged_mass_deletion_popup_ID = drawDeleteStagedMassPopup("");
    static Containers::StringView staged_mass_to_delete;

    if(ImGui::BeginTable("##StagingArea", 2,
                         ImGuiTableFlags_ScrollY|ImGuiTableFlags_BordersOuter|ImGuiTableFlags_RowBg))
    {
        ImGui::TableSetupColumn("##NameColumn", ImGuiTableColumnFlags_WidthStretch);
        ImGui::TableSetupColumn("##DeleteColumn", ImGuiTableColumnFlags_WidthFixed);

        ImGui::TableSetupScrollFreeze(0, 1);

        ImGui::TableNextRow(ImGuiTableRowFlags_Headers);

        ImGui::TableSetColumnIndex(0);
        ImGui::TextUnformatted("Staging area");
        ImGui::SameLine();
        if(ImGui::SmallButton(ICON_FA_FOLDER_OPEN " Open staging folder")) {
            openUri(Utility::Path::toNativeSeparators(_stagingDir));
        }

        for(const auto& pair : _massManager->stagedMasses()) {
            ImGui::TableNextRow();
            ImGui::TableSetColumnIndex(0);
            Containers::String staged_formatted = Utility::format("{} ({})", pair.second, pair.first);
            ImGui::Selectable(staged_formatted.data());
            if((ImGui::CalcTextSize(staged_formatted.data()).x + ImGui::GetStyle().FramePadding.x) > ImGui::GetContentRegionAvail().x) {
                drawTooltip(staged_formatted.data());
            }
            if(ImGui::BeginDragDropSource(ImGuiDragDropFlags_SourceNoHoldToOpenOthers)) {
                ImGui::SetDragDropPayload("StagedMass", &(pair.first), sizeof(Containers::String));

                ImGui::Text("%s - Staged", pair.second.data());

                ImGui::EndDragDropSource();
            }

            ImGui::TableSetColumnIndex(1);
            ImGui::PushID(pair.first.data());
            if(ImGui::SmallButton(ICON_FA_TRASH_ALT)) {
                staged_mass_to_delete = pair.first;
                ImGui::OpenPopup(staged_mass_deletion_popup_ID);
            }
            drawTooltip("Delete");
            ImGui::PopID();
        }

        ImGui::EndTable();
    }
    if(ImGui::BeginDragDropTarget()) {
        if(const ImGuiPayload* payload = ImGui::AcceptDragDropPayload("Mass")) {
            if(payload->DataSize != sizeof(int)) {
                SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Fatal error",
                                         "payload->DataSize != sizeof(int) in SaveTool::drawMassManager()",
                                         window());
                exit(EXIT_FAILURE);
            }

            int index = *(static_cast<int*>(payload->Data));

            if(!_massManager->exportMass(index)) {
                _queue.addToast(Toast::Type::Error, _massManager->lastError());
            }
        }

        ImGui::EndDragDropTarget();
    }

    drawDeleteStagedMassPopup(staged_mass_to_delete);
}

auto SaveTool::drawDeleteMassPopup(int mass_index) -> ImGuiID {
    if(!ImGui::BeginPopupModal("Confirmation##DeleteMassConfirmation", nullptr,
                               ImGuiWindowFlags_AlwaysAutoResize|ImGuiWindowFlags_NoCollapse|ImGuiWindowFlags_NoMove))
    {
        return ImGui::GetID("Confirmation##DeleteMassConfirmation");
    }

    if(_massManager->hangar(mass_index).state() == Mass::State::Empty) {
        ImGui::CloseCurrentPopup();
        ImGui::EndPopup();
        return 0;
    }

    if(_gameState != GameState::NotRunning) {
        ImGui::CloseCurrentPopup();
        ImGui::EndPopup();
        return 0;
    }

    ImGui::PushTextWrapPos(float(windowSize().x()) * 0.40f);
    if(_massManager->hangar(mass_index).state() == Mass::State::Invalid) {
        ImGui::Text("Are you sure you want to delete the invalid M.A.S.S. data in hangar %.2i ? This operation is irreversible.",
                    mass_index + 1);
    }
    else {
        ImGui::Text("Are you sure you want to delete the M.A.S.S. named %s in hangar %.2i ? This operation is irreversible.",
                    _massManager->hangar(mass_index).name().data(), mass_index + 1);
    }
    ImGui::PopTextWrapPos();

    if(ImGui::BeginTable("##DeleteMassLayout", 2)) {
        ImGui::TableSetupColumn("##Dummy", ImGuiTableColumnFlags_WidthStretch);
        ImGui::TableSetupColumn("##YesNo", ImGuiTableColumnFlags_WidthFixed);

        ImGui::TableNextRow();

        ImGui::TableSetColumnIndex(1);
        if(ImGui::Button("Yes")) {
            if(!_massManager->deleteMass(mass_index)) {
                _queue.addToast(Toast::Type::Error, _massManager->lastError());
            }
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        if(ImGui::Button("No", ImGui::GetItemRectSize())) {
            ImGui::CloseCurrentPopup();
        }

        ImGui::EndTable();
    }

    ImGui::EndPopup();

    return 0;
}

auto SaveTool::drawDeleteStagedMassPopup(Containers::StringView filename) -> ImGuiID {
    if(!ImGui::BeginPopupModal("Confirmation##DeleteStagedMassConfirmation", nullptr,
                               ImGuiWindowFlags_AlwaysAutoResize|ImGuiWindowFlags_NoCollapse|ImGuiWindowFlags_NoMove))
    {
        return ImGui::GetID("Confirmation##DeleteStagedMassConfirmation");
    }

    ImGui::PushTextWrapPos(float(windowSize().x()) * 0.40f);
    ImGui::Text("Are you sure you want to delete the staged M.A.S.S. named %s ? This operation is irreversible.",
                _massManager->stagedMasses().at(filename).data());
    ImGui::PopTextWrapPos();

    if(ImGui::BeginTable("##DeleteStagedMassLayout", 2)) {
        ImGui::TableSetupColumn("##Dummy", ImGuiTableColumnFlags_WidthStretch);
        ImGui::TableSetupColumn("##YesNo", ImGuiTableColumnFlags_WidthFixed);

        ImGui::TableNextRow();

        ImGui::TableSetColumnIndex(1);
        if(ImGui::Button("Yes")) {
            if(!_massManager->deleteStagedMass(filename)) {
                _queue.addToast(Toast::Type::Error, _massManager->lastError());
            }
            ImGui::CloseCurrentPopup();
        }
        ImGui::SameLine();
        if(ImGui::Button("No", ImGui::GetItemRectSize())) {
            ImGui::CloseCurrentPopup();
        }

        ImGui::EndTable();
    }

    ImGui::EndPopup();

    return 0;
}