#include "servercommunicator.h"
#include "apiroutes.h"

#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QRestReply>

using namespace Qt::StringLiterals;

ServerCommunicator::ServerCommunicator(QObject* parent)
    : QObject{parent} {
  m_netManager.setAutoDeleteReplies(true);
  m_restManager = std::make_shared<QRestAccessManager>(&m_netManager);
  m_serviceApi  = std::make_shared<QNetworkRequestFactory>();
}

bool ServerCommunicator::sslSupported() {
#if QT_CONFIG(ssl)
  return QSslSocket::supportsSsl();
#else
  return false;
#endif
}

QUrl ServerCommunicator::url() const { return m_serviceApi->baseUrl(); }

void ServerCommunicator::setUrl(const QUrl& url) {
  if (m_serviceApi->baseUrl() == url) {
    return;
  }
  m_serviceApi->setBaseUrl(url);
  QHttpHeaders authenticationHeaders;
  authenticationHeaders.append(QHttpHeaders::WellKnownHeader::ContentType, "application/json");
  m_serviceApi->setCommonHeaders(authenticationHeaders);
  emit urlChanged();
}

void ServerCommunicator::setServerConfiguration(const QString url,
                                                const QString email,
                                                const QString password,
                                                const QString authToken) {
  setUrl(url);

  m_email     = email;
  m_password  = password;
  m_authToken = authToken;

  if (!authToken.isEmpty()) {
    m_serviceApi->setBearerToken(authToken.toLatin1());
  }
}

void ServerCommunicator::fetchItems() { sendGetRequest(ROUTE_ITEMS); }

void ServerCommunicator::postItems(const QByteArray& jsonData) {
  QNetworkReply* reply = m_restManager->post(m_serviceApi->createRequest(ROUTE_ITEMS), jsonData);

  QObject::connect(reply, &QNetworkReply::finished, [=]() {
    if (reply->error() == QNetworkReply::NoError) {
      QByteArray responseData = reply->readAll();
      const QString message   = QString("POST successful! Response: %1").arg(responseData);
      qInfo() << message;
      emit postRequestSuccessful(responseData);
    } else {
      const QString message = QString("Error: %1").arg(reply->errorString());
      qDebug() << message;
      emit postRequestFailure(message);
    }
    reply->deleteLater();
  });
}

void ServerCommunicator::deleteItem(const QString& id) {
  const QString deleteRoute = QString("%1/%2").arg(ROUTE_ITEMS, id);
  QNetworkReply* reply = m_restManager->deleteResource(m_serviceApi->createRequest(deleteRoute));

  QObject::connect(reply, &QNetworkReply::finished, [=]() {
    if (reply->error() == QNetworkReply::NoError) {
      QByteArray responseData = reply->readAll();
      const QString message   = QString("DELETE successful! Response: %1").arg(responseData);
      qInfo() << message;
      emit deleteRequestSuccessful(responseData);
    } else {
      const QString message = QString("Error: %1").arg(reply->errorString());
      qDebug() << message;
      emit deleteRequestFailure(message);
    }
    reply->deleteLater();
  });
}

void ServerCommunicator::sendGetRequest(const QString& path) {
  // TODO check for valid path, instead of emptiness
  if (path.isEmpty()) {
    qDebug() << "Empty path -> Not sending a request.";
    return;
  }

  const QNetworkRequest request = m_serviceApi->createRequest(path);
  m_restManager->get(request, this, [this, path](QRestReply& reply) {
    if (reply.isSuccess()) {
      qInfo() << "Request successful.";
      const QJsonDocument doc = reply.readJson().value();
      onGetReplySuccessful(path, doc);
    } else {
      if (reply.hasError()) {
        const QString errorString = reply.errorString();
        qWarning() << "Network error:" << errorString;
        onGetReplyFailure(path, errorString);
      } else {
        int statusCode = reply.httpStatus();
        qWarning() << "Request not successful:" << statusCode;
        onGetReplyFailure(path, QString("HTTP status code: %1").arg(statusCode));
      }
    }
  });
}

void ServerCommunicator::onGetReplySuccessful(const QString& path, const QJsonDocument doc) {
  if (path == ROUTE_ITEMS) {
    emit itemsFetched(doc.toJson());
  } else {
    qWarning() << "Can't match request path:" << path;
  }
}

void ServerCommunicator::onGetReplyFailure(const QString& path, const QString errorString) {
  if (path == ROUTE_ITEMS) {
    emit itemsFetchFailure(errorString);
  } else {
    qWarning() << "Can't match request path:" << path;
  }
}

void ServerCommunicator::onSendPostRequestTriggered(const QString& path, const QByteArray data) {}

void ServerCommunicator::onPostReplySuccessful(const QString& path, const QJsonDocument doc) {}

void ServerCommunicator::onPostReplyFailure(const QString& path, const QString errorString) {}