#pragma once

// Qt
#include <QObject>
#include <QProcess>
#include <QFutureWatcher>

// Project
#include "main.h"
#include "MWifiNetwork.h"

// define
#define _WifiInterface WifiInterface::I()

class tst_utilities;

/*!
 * \brief The WifiInterface class
 * Communicates with Access Points
 * \details
 * - Scans for Access Points
 * - Authenticates with Access Points
 * - Disconnects from Access Points
 */
class WifiInterface : public QObject
{
    Q_OBJECT

    friend class ::tst_utilities;

    QThread *_thread  = nullptr;
    bool     _init    = false;
    bool _scanRunning = false;
    bool _useDHCP     = true;
    int     _defaultTimeout = 5000;
    int     _dhcpTimeout = 10000;
    int     _scanTimeout = 30000;
    int     _processCounter = 0;
    int     _dhcpAttemptsLeft = 5;
    QProcess _processScan;
    QProcess _processDisconnectNetwork;
    QProcess _processReadIPSettings;
    QProcess _processReadGateway;
    QProcess _processReadDNS;
    QProcess _processGenerateWPASupplicant;
    QProcess _processStartWPASupplicant;
    QProcess _processRequestAutoAssignedIP;
    QProcess _processSetStaticIPAddress;
    QProcess _processSetStaticGateway;
    QProcess _processSetStaticSubnetMask;
    QProcess _processSetDNS;
    WifiNetworkData _network;

    const QString _iface                 = "wlan0";
    const QString _wpaSupplicantConfPath = "/etc/wpa_supplicant.conf";

// Singleton
SINGLETON(WifiInterface)

private:
    QString getTextBetweenDelimiters(const QString &vText, const QString &vLeftDelim, const QString &vRightDelim);
    QList<WifiNetworkData> parseWifiScan(const QString &vOutput);
    QString parseIP(const QString &vOutput);
    QString parseBroadcast(const QString &vOutput);
    QString parseSubnetMask(const QString &vOutput);
    QString parseGateway(const QString &vOutput);
    QString parseDNS(const QString &vOutput);
    void initConnections();
    void timerEvent(QTimerEvent* event);
    void initThread(QThread &vThread);
    void quitThread();
    bool hasConnectedToWifi();
    WifiNetworkData getLastWifiNetworkConnectedTo();
    void rejoinLastWifiNetwork();
    QStringList securityTypesToStringList(const QList<WifiNetworkData::SECURITY_TYPE> &securityTypes);
    QList<WifiNetworkData::SECURITY_TYPE> variantListToSecurityTypes(const QList<QVariant> &securityTypesVar);

public:
    void start();

public slots:
    bool init(QThread &vThread);
    bool init();
    void doScan();
    void doJoinNetwork(const WifiNetworkData &vNetwork, const QString &vPassword);
    void doDisconnectNetwork(const WifiNetworkData &vNetwork);
    void doRequestIPSettings();

    // static IP address assignment
    void doRequestSetIPAddress(const QString &vIPAddress);
    void doRequestSetGateway(const QString &vGateway);
    void doRequestSetSubnetMask(const QString &vSubnetMask);
    void doRequestSetDNS(const QString &vDNS);

signals:
    void didStart(QPrivateSignal);
    void didAddNetwork(const WifiNetworkData);
    void didDisconnectNetwork(const WifiNetworkData);
    void didRejectRequest(const QString &vFunction, const QString &vReason);
    void didBusyChanged(const bool &vBusy);
    void didStatusChanged(const QString &vNewStatus);
    void didRequestAutoAssignedIP();
    // static IP address settings
    void didSetStaticIPAddress();
    void didSetGateway();
    void didSetSubnetMask();
    void didSetDNS();

    // emitted from separate threads
    void didScanStatusChanged(const bool);
    void didConnectToNetwork(const WifiNetworkData);
    void didError(const QString);

private slots:
    void quit();
    void onQuit();
    void onStart();
    void onStatusChanged(const QString &vMessage);
    void onRequestAutoAssignedIP();
    void onProcessFinishedScan(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedReadIP(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedReadGateway(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedReadDNS(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedGenerateWPASupplicant(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedStartWPASupplicant(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedRequestAutoAssignedIP(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedDisconnectNetwork(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedSetIPAddress(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedSetGateway(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedSetSubnetMask(int vExitCode, QProcess::ExitStatus vExitStatus);
    void onProcessFinishedSetDNS(int vExitCode, QProcess::ExitStatus vExitStatus);
};