/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef ANDROIDVPNACTIVITY_H
#define ANDROIDVPNACTIVITY_H

#include <QObject>

#include "jni.h"

// Binder Codes for VPNServiceBinder
// See also - VPNServiceBinder.kt
// Actions that are Requestable
enum ServiceAction {
    // Activate the vpn. Body requires a json wg-conf
    ACTION_ACTIVATE = 1,
    // Deactivate the vpn. Body is empty
    ACTION_DEACTIVATE = 2,
    // Register an IBinder to recieve events body is an Ibinder
    ACTION_REGISTERLISTENER = 3,
    // Requests an EVENT_STATISTIC_UPDATE to be send
    ACTION_REQUEST_STATISTIC = 4,
    ACTION_REQUEST_GET_LOG = 5,
    // Requests to clean up the internal log
    ACTION_REQUEST_CLEANUP_LOG = 6,
    // Retry activation using the last config
    // Used when the activation is aborted for VPN-Permission prompt
    ACTION_RESUME_ACTIVATE = 7,
    // Sets the current notification text.
    // Does nothing if there is no notification
    ACTION_SET_NOTIFICATION_TEXT = 8,
    // Sets the fallback text if the OS triggered the VPN-Service
    // to show a notification
    ACTION_SET_NOTIFICATION_FALLBACK = 9,
    // Share used config
    ACTION_SHARE_CONFIG = 10,
};
typedef enum ServiceAction ServiceAction;

// Event Types that will be Dispatched after registration
enum ServiceEvents {
    // The Service has Accecpted our Binder
    // Responds with the current status of the vpn.
    EVENT_INIT = 0,
    // WG-Go has enabled the adapter (empty response)
    EVENT_CONNECTED = 1,
    // WG-Go has disabled the adapter (empty response)
    EVENT_DISCONNECTED = 2,
    // Contains the Current transfered bytes to endpoint x.
    EVENT_STATISTIC_UPDATE = 3,
    EVENT_BACKEND_LOGS = 4,
    // An Error happened during activation
    // Contains the error message
    EVENT_ACTIVATION_ERROR = 5,
    EVENT_NEED_PERMISSION = 6,
    // Import of existing config
    EVENT_CONFIG_IMPORT = 7,
};
typedef enum ServiceEvents ServiceEvents;

enum UIEvents {
    QR_CODED_DECODED = 0,
};
typedef enum UIEvents UIEvents;

class AndroidVPNActivity : public QObject
{
    Q_OBJECT

public:
    static void maybeInit();
    static AndroidVPNActivity* instance();
    static bool handleBackButton(JNIEnv* env, jobject thiz);
    static void sendToService(ServiceAction type, const QString& data);
    static void connectService();
    static void startQrCodeReader();
    static void saveFileAs(QString fileContent, QString suggestedFilename);

signals:
    void serviceConnected();
    void serviceDisconnected();
    void eventInitialized(const QString& data);
    void eventConnected(const QString& data);
    void eventDisconnected(const QString& data);
    void eventStatisticUpdate(const QString& data);
    void eventBackendLogs(const QString& data);
    void eventActivationError(const QString& data);
    void eventConfigImport(const QString& data);
    void eventQrCodeReceived(const QString& data);

private:
    AndroidVPNActivity();

    static void onServiceMessage(JNIEnv* env, jobject thiz, jint messageType, jstring body);
    static void onServiceConnected(JNIEnv* env, jobject thiz);
    static void onServiceDisconnected(JNIEnv* env, jobject thiz);
    static void onAndroidVpnActivityMessage(JNIEnv* env, jobject thiz, jint messageType, jstring message);
    void handleServiceMessage(int code, const QString& data);
    void handleActivityMessage(int code, const QString& data);
};

#endif // ANDROIDVPNACTIVITY_H