#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#include <Wt/WAbstractTableModel.h>
#pragma GCC diagnostic pop
#include <Wt/WApplication.h>
#include <Wt/WBootstrap5Theme.h>
#include <Wt/WContainerWidget.h>
#include <Wt/WGridLayout.h>
#include <Wt/WHBoxLayout.h>
#include <Wt/WMenuItem.h>
#include <Wt/WPanel.h>
#include <Wt/WPushButton.h>
#include <Wt/WServer.h>
#include <Wt/WTableView.h>
#include <Wt/WTabWidget.h>
#include <Wt/WText.h>
#include <Wt/WVBoxLayout.h>

using namespace std;
using namespace Wt;
using namespace Wt::cpp17;

#define SET_BS5THEME  1

// Always apply theme before creating widgets!
class CThemedApplication : public WApplication
{
public:
    CThemedApplication(const WEnvironment& rcEnv)
    : WApplication{rcEnv}
    {
        #if SET_BS5THEME
            setTheme(make_shared<WBootstrap5Theme>());
        #endif
    }
};

class CFixedTableModel : public WAbstractTableModel
{
public:
    CFixedTableModel(const int rowCount, const int colCount)
    : _rowCount{rowCount}
    , _colCount{colCount}
    { }

    any headerData(const int section, const Orientation orientation, const ItemDataRole role) const
    {
        if (orientation != Orientation::Horizontal)  throw invalid_argument("orientation");
        switch (role.value())
        {
            default:                     return {};
            case ItemDataRole::Display:  return format("C{}", section);
        }
    }

    any data(const WModelIndex& index, const ItemDataRole role) const override
    {
        if (!index.isValid())  return {};
        switch (role.value())
        {
            default:                     return {};
            case ItemDataRole::Display:  return format("{}, {}", index.row(), index.column());
        }
    }

    //! Returns the WModelIndex moved by delta.
    [[nodiscard]]
    WModelIndex move(const WModelIndex& index, int rowDelta, int colDelta)
    {
      const int row{clamp(index.row()    + rowDelta, 0, _rowCount - 1)};
      const int col{clamp(index.column() + colDelta, 0, _colCount - 1)};
      return createIndex(row, col, nullptr);
    }

    int columnCount(const WModelIndex& index) const override { return index.isValid() ? 0 : _colCount; }
    int rowCount   (const WModelIndex& index) const override { return index.isValid() ? 0 : _rowCount; }

    const int _rowCount;
    const int _colCount;
};

template<typename T, typename... TArgs>
constexpr inline
std::unique_ptr<T> create(std::function<void (T&)>&& fInitialize, TArgs&&... args)
{
  std::unique_ptr<T> Ptr{std::make_unique<T>(std::forward<TArgs>(args)...)};
  fInitialize(*Ptr);
  return Ptr;
}

inline void setAccessKey(WInteractWidget& widget, const char mnemonic) { widget.setAttributeValue("accesskey", string(1, tolower(mnemonic))); }

class CApplication final : public CThemedApplication
{
public:
    CApplication(const WEnvironment& rcEnv);

private:
    WServer& _Server; //!< The associated WServer instance, needed for async operations.

    WContainerWidget& _cntRoot{*root()};
    WBoxLayout& _lytRoot{*_cntRoot.setLayout(make_unique<WVBoxLayout>())};

    WPushButton& _btnP{*_lytRoot.addWidget(create<WPushButton>([this](auto& btnP)
        {
            btnP.clicked().connect([this] { _pnlBottom.show(); });
            btnP.setTextFormat(TextFormat::UnsafeXHTML);
            setAccessKey(btnP, 'p');
        }, "Show <u>p</u>anel"))};

    WTabWidget& _tbwMain{*_lytRoot.addWidget(make_unique<WTabWidget>(), /*stretch*/ 100)};
    WMenuItem& _tabA{*_tbwMain.addTab(make_unique<WTableView>(), "A", ContentLoading::Eager)};
    WTableView& _tvA{dynamic_cast<WTableView&>(*_tbwMain.widget(_tbwMain.count() - 1))};
    WMenuItem& _tabB{*_tbwMain.addTab(make_unique<WTableView>(), "B", ContentLoading::Eager)};
    WTableView& _tvB{dynamic_cast<WTableView&>(*_tbwMain.widget(_tbwMain.count() - 1))};

    WPanel& _pnlBottom{*_lytRoot.addWidget(make_unique<WPanel>())};
    WContainerWidget& _cntBottom{*_pnlBottom.setCentralWidget(make_unique<WContainerWidget>())};
    WBoxLayout& _lytBottom{*_cntBottom.setLayout(make_unique<WHBoxLayout>())};

    WPushButton& _btnA{*_lytBottom.addWidget(create<WPushButton>([this](auto& btnA)
        {
            btnA.clicked().connect([this] { _tvA.setColumnWidth(0, 50); });
            btnA.setTextFormat(TextFormat::UnsafeXHTML);
            setAccessKey(btnA, '0');
        }, "Set C<u>0</u> width"))};
    WPushButton& _btnB{*_lytBottom.addWidget(create<WPushButton>([this](auto& btnB)
        {
            btnB.clicked().connect([this] { _tvA.setColumnWidth(1, 50); });
            btnB.setTextFormat(TextFormat::UnsafeXHTML);
            setAccessKey(btnB, '1');
        }, "Set C<u>1</u> width"))};
    WPushButton& _btnC{*_lytBottom.addWidget(create<WPushButton>([this](auto& btnC)
        {
            btnC.clicked().connect([this] { _tvA.setColumnWidth(2, 50); });
            btnC.setTextFormat(TextFormat::UnsafeXHTML);
            setAccessKey(btnC, '2');
        }, "Set C<u>2</u> width"))};

    shared_ptr<CFixedTableModel> _mdlAPtr{make_shared<CFixedTableModel>(100,  50)};
    shared_ptr<CFixedTableModel> _mdlBPtr{make_shared<CFixedTableModel>(200, 100)};

    const vector<reference_wrapper<WWidget>> _appWidgets{_tabA, _tabB, _pnlBottom};
};

CApplication::CApplication(const WEnvironment& rcEnv)
: CThemedApplication{rcEnv}
, _Server{*environment().server()}
{
    setTitle("bug repro");

    const auto initTable = [](WTableView& tv, const shared_ptr<CFixedTableModel>& mdlPtr)
        {
            tv.setSelectionBehavior(SelectionBehavior::Items);
            tv.setSelectionMode(SelectionMode::Single);
            tv.setSortingEnabled(false);
            tv.setCanReceiveFocus(true);
            tv.setEditTriggers(EditTrigger::None);
            tv.setAlternatingRowColors(true);
            tv.setModel(mdlPtr);
            tv.setRowHeaderCount(1);

            tv.selectionChanged().connect([&tv]
                {
                    const WModelIndexSet selectedIndexes{tv.selectionModel()->selectedIndexes()};
                    switch (selectedIndexes.size())
                    {
                        case 0:  break;
                        case 1:  tv.scrollTo(*selectedIndexes.cbegin()); break;
                        default: throw logic_error("multi-selection unexpected");
                    }
                });

            tv.select(mdlPtr->move(WModelIndex{}, 0, 1));
        };
    initTable(_tvA, _mdlAPtr);
    initTable(_tvB, _mdlBPtr);

    _lytBottom.setContentsMargins(0, 0, 0, 0);
    _lytBottom.addStretch(100);

    _tvA.setColumnWidth(0, 70);
    _Server.schedule(1s, sessionId(), [this]
        {
            _tvA.setColumnWidth(0, 60);
            triggerUpdate();
        });

    // final action after creating the UI
    enableUpdates();
}

int main(int argc, char* argv[])
{
    return WRun(argc, argv, [](const WEnvironment& rcEnv)
        {
            try
            {
                return make_unique<CApplication>(rcEnv);
            }
            catch (const std::exception& rcException)
            {
                cerr << "exception " << typeid(remove_cvref<decltype(rcException)>::type).name() << ": " << rcException.what() << endl;

                #if DEBUG
                    exit(-1);
                #endif
                throw;
            }
        });
}