#pragma once

#include <QCoroTask>

#include <QObject>
#include <QtQml/qqmlregistration.h>

// Keeps the translation API key in the system keychain (KWallet / Secret Service)
// instead of the plain-text config file.
class ApiKeyStore : public QObject
{
    Q_OBJECT
    QML_ELEMENT
    QML_SINGLETON

    Q_PROPERTY(bool hasKey READ hasKey NOTIFY hasKeyChanged)
    Q_PROPERTY(QString error READ error NOTIFY errorChanged)
    Q_PROPERTY(bool busy READ busy NOTIFY busyChanged)

public:
    struct ReadResult {
        QString key;
        QString error;
    };

    explicit ApiKeyStore(QObject *parent = nullptr);

    bool hasKey() const;
    QString error() const;
    bool busy() const;

    // Stores \a key, or removes the stored key when it is empty.
    Q_INVOKABLE void setKey(const QString &key);
    // Repeats the failed read, write, or removal without asking for the key again.
    Q_INVOKABLE void retry();

    // An empty key without error means none is stored.
    static QCoro::Task<ReadResult> readKey();

Q_SIGNALS:
    void hasKeyChanged();
    void errorChanged();
    void busyChanged();

private:
    QCoro::Task<> refresh();
    QCoro::Task<> store(QString key);
    void setHasKey(bool hasKey);
    void setError(const QString &error);
    void setBusy(bool busy);

    bool m_hasKey = false;
    QString m_error;
    bool m_busy = false;
    bool m_retryStore = false;
    QString m_pendingKey;
};