/*
 * SPDX-License-Identifier: LGPL-2.0-or-later
 *
 * The Ollie command-palette plugin for Kate / KTextEditor.
 *
 * OlliePlugin is the KTextEditor::Plugin entry point. For every MainWindow the
 * host creates an OllieView, which registers the "Command Palette (M-x)" action
 * (Alt+X) and, when triggered, gathers every QAction currently exposed by the
 * window's GUI clients into a PaletteWidget for orderless fuzzy selection.
 */
#ifndef KATECUSTOM_OLLIEPLUGIN_H
#define KATECUSTOM_OLLIEPLUGIN_H

#include <KTextEditor/Plugin>

#include <QObject>
#include <QPointer>
#include <QHash>
#include <QList>

class QAction;

namespace KTextEditor
{
class MainWindow;
}

namespace katecustom
{

class PaletteWidget;
class RadialMenu;
struct RadialDef;

class OlliePlugin : public KTextEditor::Plugin
{
    Q_OBJECT

public:
    explicit OlliePlugin(QObject *parent, const QVariantList &args = {});
    ~OlliePlugin() override;

    QObject *createView(KTextEditor::MainWindow *mainWindow) override;
};

class OllieView : public QObject
{
    Q_OBJECT

public:
    OllieView(OlliePlugin *plugin, KTextEditor::MainWindow *mainWindow);
    ~OllieView() override;

private Q_SLOTS:
    void showCommandPalette();
    void runAction(const QString &actionId);

private:
    // One harvested, runnable action with the provenance needed to build a
    // unique id and to disambiguate labels shared by several commands.
    struct ActionEntry {
        QPointer<QAction> action;
        QString label;      // visible text, ampersands stripped
        QString component;  // owning collection's display name (provenance)
        QString shortcut;   // current shortcut, native text
        QString id;         // unique, stable key used on activation
    };

    // Collect every unique, enabled, visible QAction reachable from the
    // window's GUI factory clients, deduplicated by pointer identity.
    QList<ActionEntry> collectActions() const;

    // Find a Kate action by its raw objectName across all GUI clients. Used to
    // resolve radial-menu slice ids (which reference Kate action names).
    QAction *findActionByName(const QString &objectName) const;

    // Build the configured radials and bind each to its trigger key.
    void setupRadials();
    void showRadial(int defIndex);              // centre on the caret
    void showRadialAt(int defIndex, const QPoint &globalPos); // centre on a point
    void onRadialActivated(const QString &actionId);

    // Catches configured mouse-button gestures inside the active view.
    bool eventFilter(QObject *obj, QEvent *event) override;

    KTextEditor::MainWindow *m_mainWindow;
    PaletteWidget *m_palette = nullptr;
    RadialMenu *m_radial = nullptr;
    QList<RadialDef> m_radialDefs;
    QHash<int, int> m_buttonToRadial; // Qt::MouseButton (int) -> def index
    bool m_gestureActive = false;     // an RMB drag gesture is in progress
    bool m_leftDownInView = false;    // LMB held inside the view (Acme chord anchor)
    QHash<QString, QPointer<QAction>> m_actionsById;
};

} // namespace katecustom

#endif