#pragma once

#include "engine/InputEngine.h"

#include <QList>
#include <QSet>
#include <QString>

// Records what the keyboard sends and applies it to a simulated field, so
// tests check the text a user would see rather than the calls made.
class FakeEngine : public InputEngine
{
public:
    void commitText(const QString &text) override { output += text; }

    void replaceBeforeCursor(const QString &before, const QString &text) override
    {
        if (output.endsWith(before))
            output.chop(before.size());
        else
            mismatchedReplacements++;
        output += text;
    }

    void sendKeysym(quint32 keysym, Qt::KeyboardModifiers modifiers) override
    {
        keysyms.append(keysym);
        lastModifiers = modifiers;
    }

    void setKeyPressed(quint32 keysym, bool pressed) override
    {
        keyEvents.append({keysym, pressed});
        if (pressed)
            held.insert(keysym);
        else
            held.remove(keysym);
    }

    struct KeyEvent {
        quint32 keysym;
        bool pressed;
        bool operator==(const KeyEvent &) const = default;
    };

    QString output;               // the field's text
    int mismatchedReplacements = 0; // replaced text that wasn't before the cursor
    QList<quint32> keysyms;
    Qt::KeyboardModifiers lastModifiers;
    QList<KeyEvent> keyEvents; // setKeyPressed calls
    QSet<quint32> held;
};