#include <exception>
#include <iostream>

#include <QString>
#include <QUrl>
#include <QUrlQuery>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QNetworkCookie>

#define libCommsyAuth_NAME "libcommsyauth"
#define libCommsyAuth_VERSION "0.1-alpha"

class authFailureError : public std::exception {};


class libCommsyAuth : public QObject {
    Q_OBJECT

public:
    Q_SIGNALS:
    void reEmit(QNetworkReply *r);

public:
    explicit libCommsyAuth(QObject *p = nullptr) : QObject (p){
        mNetMan = new QNetworkAccessManager(this);
        mNetReq = new QNetworkRequest();
        connect(mNetMan, &QNetworkAccessManager::finished, this, &libCommsyAuth::reEmit);
    }

    ~libCommsyAuth() {
        delete mNetMan;
        delete mNetReq;
    }

    QNetworkAccessManager *mNetMan = nullptr;
    QNetworkRequest *mNetReq = nullptr;

    void connectInit(const QUrl& serverBaseUrl) {
        // Initialise request
        //mNetReq->setTransferTimeout(15000);
        mNetReq->setUrl(serverBaseUrl);
        mNetReq->setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
        mNetMan->get(*mNetReq);
    }

    QString getAuthUrl(const QNetworkReply *reply) {
        return reply->url().toString();
    }

    void sendAuth(const QString& authUrl, const QString& username, const QString& password) {
        QUrlQuery mNetQuery;

        // Set auth credentials
        mNetQuery.addQueryItem("user_id", username);
        mNetQuery.addQueryItem("password", password);

        // Create request
        mNetReq->setUrl(authUrl + "&mod=context&fct=login");
        mNetReq->setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");

        // Perform the request
        mNetMan->post(*mNetReq, mNetQuery.toString(QUrl::FullyEncoded).toUtf8());
    }

    QString getSID(QNetworkReply *reply) {
        auto cookies = QNetworkCookie::parseCookies(reply->rawHeader("Set-Cookie"));

        for (const auto& cookie : cookies) {
            if (cookie.name() == "SID") {
                std::cout << cookie.value().toStdString() << std::endl;
                return cookie.value();
            }
        }

        throw authFailureError();
    }
};