// For license of this file, see <project-root-folder>/LICENSE.md.

#include "services/abstract/feed.h"

#include "definitions/definitions.h"
#include "miscellaneous/application.h"
#include "miscellaneous/databasequeries.h"
#include "miscellaneous/feedreader.h"
#include "miscellaneous/iconfactory.h"
#include "miscellaneous/mutex.h"
#include "miscellaneous/textfactory.h"
#include "services/abstract/cacheforserviceroot.h"
#include "services/abstract/gui/formfeeddetails.h"
#include "services/abstract/importantnode.h"
#include "services/abstract/labelsnode.h"
#include "services/abstract/recyclebin.h"
#include "services/abstract/serviceroot.h"

#include <QThread>

Feed::Feed(RootItem* parent)
  : RootItem(parent), m_url(QString()), m_status(Status::Normal), m_autoUpdateType(AutoUpdateType::DefaultAutoUpdate),
  m_autoUpdateInitialInterval(DEFAULT_AUTO_UPDATE_INTERVAL), m_autoUpdateRemainingInterval(DEFAULT_AUTO_UPDATE_INTERVAL),
  m_messageFilters(QList<QPointer<MessageFilter>>()) {

  m_passwordProtected = false;
  m_username = QString();
  m_password = QString();

  setKind(RootItem::Kind::Feed);
}

Feed::Feed(const QSqlRecord& record) : Feed(nullptr) {
  setTitle(record.value(FDS_DB_TITLE_INDEX).toString());
  setId(record.value(FDS_DB_ID_INDEX).toInt());
  setUrl(record.value(FDS_DB_URL_INDEX).toString());
  setCustomId(record.value(FDS_DB_CUSTOM_ID_INDEX).toString());

  if (customId().isEmpty()) {
    setCustomId(QString::number(id()));
  }

  setDescription(QString::fromUtf8(record.value(FDS_DB_DESCRIPTION_INDEX).toByteArray()));
  setCreationDate(TextFactory::parseDateTime(record.value(FDS_DB_DCREATED_INDEX).value<qint64>()).toLocalTime());
  setIcon(qApp->icons()->fromByteArray(record.value(FDS_DB_ICON_INDEX).toByteArray()));
  setAutoUpdateType(static_cast<Feed::AutoUpdateType>(record.value(FDS_DB_UPDATE_TYPE_INDEX).toInt()));
  setAutoUpdateInitialInterval(record.value(FDS_DB_UPDATE_INTERVAL_INDEX).toInt());

  setPasswordProtected(record.value(FDS_DB_PROTECTED_INDEX).toBool());
  setUsername(record.value(FDS_DB_USERNAME_INDEX).toString());

  if (record.value(FDS_DB_PASSWORD_INDEX).toString().isEmpty()) {
    setPassword(record.value(FDS_DB_PASSWORD_INDEX).toString());
  }
  else {
    setPassword(TextFactory::decrypt(record.value(FDS_DB_PASSWORD_INDEX).toString()));
  }

  qDebugNN << LOGSEC_CORE
           << "Custom ID of feed when loading from DB is"
           << QUOTE_W_SPACE_DOT(customId());
}

Feed::Feed(const Feed& other) : RootItem(other) {
  setKind(RootItem::Kind::Feed);

  setCountOfAllMessages(other.countOfAllMessages());
  setCountOfUnreadMessages(other.countOfUnreadMessages());
  setUrl(other.url());
  setStatus(other.status());
  setAutoUpdateType(other.autoUpdateType());
  setAutoUpdateInitialInterval(other.autoUpdateInitialInterval());
  setAutoUpdateRemainingInterval(other.autoUpdateRemainingInterval());
  setMessageFilters(other.messageFilters());

  setPasswordProtected(other.passwordProtected());
  setUsername(other.username());
  setPassword(other.password());
}

Feed::~Feed() = default;

QList<Message> Feed::undeletedMessages() const {
  QSqlDatabase database = qApp->database()->connection(metaObject()->className());

  return DatabaseQueries::getUndeletedMessagesForFeed(database, customId(), getParentServiceRoot()->accountId());
}

bool Feed::passwordProtected() const {
  return m_passwordProtected;
}

void Feed::setPasswordProtected(bool passwordProtected) {
  m_passwordProtected = passwordProtected;
}

QString Feed::username() const {
  return m_username;
}

void Feed::setUsername(const QString& username) {
  m_username = username;
}

QString Feed::password() const {
  return m_password;
}

void Feed::setPassword(const QString& password) {
  m_password = password;
}

QVariant Feed::data(int column, int role) const {
  switch (role) {
    case Qt::ForegroundRole:
      switch (status()) {
        case Status::NewMessages:
          return qApp->skins()->currentSkin().m_colorPalette[Skin::PaletteColors::Highlight];

        case Status::NetworkError:
        case Status::ParsingError:
        case Status::AuthError:
        case Status::OtherError:
          return qApp->skins()->currentSkin().m_colorPalette[Skin::PaletteColors::Error];

        default:
          return QVariant();
      }

    default:
      return RootItem::data(column, role);
  }
}

int Feed::autoUpdateInitialInterval() const {
  return m_autoUpdateInitialInterval;
}

int Feed::countOfAllMessages() const {
  return m_totalCount;
}

int Feed::countOfUnreadMessages() const {
  return m_unreadCount;
}

void Feed::setCountOfAllMessages(int count_all_messages) {
  m_totalCount = count_all_messages;
}

void Feed::setCountOfUnreadMessages(int count_unread_messages) {
  if (status() == Status::NewMessages && count_unread_messages < countOfUnreadMessages()) {
    setStatus(Status::Normal);
  }

  m_unreadCount = count_unread_messages;
}

bool Feed::canBeEdited() const {
  return true;
}

bool Feed::editViaGui() {
  QScopedPointer<FormFeedDetails> form_pointer(new FormFeedDetails(getParentServiceRoot(), qApp->mainFormWidget()));

  form_pointer->editBaseFeed(this);
  return false;
}

bool Feed::editItself(Feed* new_feed_data) {
  QSqlDatabase database = qApp->database()->connection(metaObject()->className());

  if (DatabaseQueries::editBaseFeed(database, id(), new_feed_data->autoUpdateType(),
                                    new_feed_data->autoUpdateInitialInterval(),
                                    new_feed_data->passwordProtected(),
                                    new_feed_data->username(),
                                    new_feed_data->password())) {
    setPasswordProtected(new_feed_data->passwordProtected());
    setUsername(new_feed_data->username());
    setPassword(new_feed_data->password());
    setAutoUpdateType(new_feed_data->autoUpdateType());
    setAutoUpdateInitialInterval(new_feed_data->autoUpdateInitialInterval());
    return true;
  }
  else {
    return false;
  }
}

void Feed::setAutoUpdateInitialInterval(int auto_update_interval) {
  // If new initial auto-update interval is set, then
  // we should reset time that remains to the next auto-update.
  m_autoUpdateInitialInterval = auto_update_interval;
  m_autoUpdateRemainingInterval = auto_update_interval;
}

Feed::AutoUpdateType Feed::autoUpdateType() const {
  return m_autoUpdateType;
}

void Feed::setAutoUpdateType(Feed::AutoUpdateType auto_update_type) {
  m_autoUpdateType = auto_update_type;
}

int Feed::autoUpdateRemainingInterval() const {
  return m_autoUpdateRemainingInterval;
}

void Feed::setAutoUpdateRemainingInterval(int auto_update_remaining_interval) {
  m_autoUpdateRemainingInterval = auto_update_remaining_interval;
}

Feed::Status Feed::status() const {
  return m_status;
}

void Feed::setStatus(const Feed::Status& status) {
  m_status = status;
}

QString Feed::url() const {
  return m_url;
}

void Feed::setUrl(const QString& url) {
  m_url = url;
}

void Feed::appendMessageFilter(MessageFilter* filter) {
  m_messageFilters.append(QPointer<MessageFilter>(filter));
}

void Feed::updateCounts(bool including_total_count) {
  bool is_main_thread = QThread::currentThread() == qApp->thread();
  QSqlDatabase database = is_main_thread ?
                          qApp->database()->connection(metaObject()->className()) :
                          qApp->database()->connection(QSL("feed_upd"));
  int account_id = getParentServiceRoot()->accountId();

  if (including_total_count) {
    setCountOfAllMessages(DatabaseQueries::getMessageCountsForFeed(database, customId(), account_id, true));
  }

  setCountOfUnreadMessages(DatabaseQueries::getMessageCountsForFeed(database, customId(), account_id, false));
}

bool Feed::cleanMessages(bool clean_read_only) {
  return getParentServiceRoot()->cleanFeeds(QList<Feed*>() << this, clean_read_only);
}

QList<Message> Feed::obtainNewMessages(bool* error_during_obtaining) {
  Q_UNUSED(error_during_obtaining)

  return {};
}

bool Feed::markAsReadUnread(RootItem::ReadStatus status) {
  ServiceRoot* service = getParentServiceRoot();
  auto* cache = dynamic_cast<CacheForServiceRoot*>(service);

  if (cache != nullptr) {
    cache->addMessageStatesToCache(service->customIDSOfMessagesForItem(this), status);
  }

  return service->markFeedsReadUnread(QList<Feed*>() << this, status);
}

int Feed::updateMessages(const QList<Message>& messages, bool error_during_obtaining, bool force_update) {
  QList<RootItem*> items_to_update;
  int updated_messages = 0;

  if (!error_during_obtaining) {
    bool is_main_thread = QThread::currentThread() == qApp->thread();

    qDebugNN << LOGSEC_CORE
             << "Updating messages in DB. Main thread:"
             << QUOTE_W_SPACE_DOT(is_main_thread ? "true" : "false");

    bool anything_updated = false;
    bool ok = true;

    if (!messages.isEmpty()) {
      qDebugNN << LOGSEC_CORE
               << "There are some messages to be updated/added to DB.";

      QString custom_id = customId();
      int account_id = getParentServiceRoot()->accountId();
      QSqlDatabase database = is_main_thread ?
                              qApp->database()->connection(metaObject()->className()) :
                              qApp->database()->connection(QSL("feed_upd"));

      updated_messages = DatabaseQueries::updateMessages(database, messages, custom_id, account_id,
                                                         url(), force_update, &anything_updated, &ok);
    }
    else {
      qDebugNN << LOGSEC_CORE
               << "There are no messages for update.";
    }

    if (ok) {
      setStatus(updated_messages > 0 ? Status::NewMessages : Status::Normal);
      updateCounts(true);

      if (getParentServiceRoot()->recycleBin() != nullptr && anything_updated) {
        getParentServiceRoot()->recycleBin()->updateCounts(true);
        items_to_update.append(getParentServiceRoot()->recycleBin());
      }

      if (getParentServiceRoot()->importantNode() != nullptr && anything_updated) {
        getParentServiceRoot()->importantNode()->updateCounts(true);
        items_to_update.append(getParentServiceRoot()->importantNode());
      }

      if (getParentServiceRoot()->labelsNode() != nullptr) {
        getParentServiceRoot()->labelsNode()->updateCounts(true);
        items_to_update.append(getParentServiceRoot()->labelsNode());
      }
    }
  }
  else {
    qCriticalNN << LOGSEC_CORE
                << "There is indication that there was error during messages obtaining.";
  }

  // Some messages were really added to DB, reload feed in model.
  items_to_update.append(this);
  getParentServiceRoot()->itemChanged(items_to_update);

  return updated_messages;
}

QString Feed::getAutoUpdateStatusDescription() const {
  QString auto_update_string;

  switch (autoUpdateType()) {
    case AutoUpdateType::DontAutoUpdate:

      //: Describes feed auto-update status.
      auto_update_string = tr("does not use auto-downloading of messages");
      break;

    case AutoUpdateType::DefaultAutoUpdate:

      //: Describes feed auto-update status.
      auto_update_string = qApp->feedReader()->autoUpdateEnabled()
              ? tr("uses global settings (%n minute(s) to next auto-download of messages)",
                   nullptr,
                   qApp->feedReader()->autoUpdateRemainingInterval())
              : tr("uses global settings (global auto-downloading of messages is disabled)");
      break;

    case AutoUpdateType::SpecificAutoUpdate:
    default:

      //: Describes feed auto-update status.
      auto_update_string = tr("uses specific settings (%n minute(s) to next auto-downloading of new messages)", nullptr, autoUpdateRemainingInterval());
      break;
  }

  return auto_update_string;
}

QString Feed::getStatusDescription() const {
  switch (m_status) {
    case Status::Normal:
      return tr("no errors");

    case Status::NewMessages:
      return tr("has new messages");

    case Status::AuthError:
      return tr("authentication error");

    case Status::NetworkError:
      return tr("network error");

    default:
      return tr("unspecified error");
  }
}

QList<QPointer<MessageFilter>> Feed::messageFilters() const {
  return m_messageFilters;
}

void Feed::setMessageFilters(const QList<QPointer<MessageFilter>>& filters) {
  m_messageFilters = filters;
}

void Feed::removeMessageFilter(MessageFilter* filter) {
  int idx = m_messageFilters.indexOf(filter);

  if (idx >= 0) {
    m_messageFilters.removeAll(filter);
  }
}

QString Feed::additionalTooltip() const {
  return tr("Auto-update status: %1\n"
            "Active message filters: %2\n"
            "Status: %3").arg(getAutoUpdateStatusDescription(),
                              QString::number(m_messageFilters.size()),
                              getStatusDescription());
}