#include "editorviewhelper.h"

#include <QActionGroup>
#include <QApplication>
#include <QMenu>

#include <KActionMenu>

#include "ILexer.h"
#include "Lexilla.h"

const QMultiMap<QChar, QString> languages_group = std::visit([]() -> QMultiMap<QChar, QString> {
    int lexerCount = GetLexerCount();
    char buffer[114];
    QMultiMap<QChar, QString> map;
    for (int i = 0; i < lexerCount; i++) {
        GetLexerName(i, buffer, 114);
        QString lexerName(buffer);
        map.insert(lexerName.at(0).toLower(), lexerName);
    }
    return map;
});

std::list<QChar> LexerGroupActionMenu::groups()
{
    QList<QChar> keys = languages_group.keys();
    std::list<QChar> keysLst(keys.constBegin(), keys.constEnd());
    keysLst.unique();
    return keysLst;
}

QString LexerGroupActionMenu::displayName(const QString &lexerName)
{
    static const QHash<QString, QString> displayNameMap {
        {"cpp", "C++"},
        {"cmake", "CMake"},
        {"hypertext", "HTML"},
        {"powershell", "PowerShell"}
    };

    return displayNameMap.value(lexerName, lexerName);
}

void LexerGroupActionMenu::slotAboutToShow()
{
    if (!m_group) {
        m_group = new QActionGroup(menu());
    } else {
        return;
    }

    for (const QString & name : languages_group.values(m_languageGroup)) {
        QAction *a = menu()->addAction(displayName(name), this, [this, name](){
            emit lexerSelected(name);
        });
        a->setActionGroup(m_group);
    }
}