/*
Copyright (C) 2012 Sebastian Herbord. All rights reserved.

This file is part of Mod Organizer.

Mod Organizer is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Mod Organizer is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Mod Organizer.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "downloadlistsortproxy.h"
#include "downloadlist.h"
#include "downloadmanager.h"
#include "settings.h"

DownloadListSortProxy::DownloadListSortProxy(const DownloadManager *manager, QObject *parent)
  : QSortFilterProxyModel(parent), m_Manager(manager), m_CurrentFilter()
{
}

void DownloadListSortProxy::updateFilter(const QString &filter)
{
  m_CurrentFilter = filter;
  invalidateFilter();
}


bool DownloadListSortProxy::lessThan(const QModelIndex &left,
                                     const QModelIndex &right) const
{
  int leftIndex  = left.row();
  int rightIndex = right.row();
  if ((leftIndex < m_Manager->numTotalDownloads())
      && (rightIndex < m_Manager->numTotalDownloads())) {
    if (left.column() == DownloadList::COL_NAME) {
      return m_Manager->getFileName(left.row()).compare(m_Manager->getFileName(right.row()), Qt::CaseInsensitive) < 0;
    } else if (left.column() == DownloadList::COL_MODNAME) {
      QString leftName, rightName;

      if (!m_Manager->isInfoIncomplete(left.row())) {
        const MOBase::ModRepositoryFileInfo *info = m_Manager->getFileInfo(left.row());
        leftName = info->modName;
      }

      if (!m_Manager->isInfoIncomplete(right.row())) {
        const MOBase::ModRepositoryFileInfo *info = m_Manager->getFileInfo(right.row());
        rightName = info->modName;
      }

      return leftName.compare(rightName, Qt::CaseInsensitive) < 0;
    } else if (left.column() == DownloadList::COL_VERSION) {
        MOBase::VersionInfo versionLeft, versionRight;

        if (!m_Manager->isInfoIncomplete(left.row())) {
          const MOBase::ModRepositoryFileInfo *info = m_Manager->getFileInfo(left.row());
          versionLeft = info->version;
        }

        if (!m_Manager->isInfoIncomplete(right.row())) {
          const MOBase::ModRepositoryFileInfo *info = m_Manager->getFileInfo(right.row());
          versionRight = info->version;
        }

        return versionLeft < versionRight;
    } else if (left.column() == DownloadList::COL_ID) {
      int leftID=0, rightID=0;

      if (!m_Manager->isInfoIncomplete(left.row())) {
        const MOBase::ModRepositoryFileInfo *info = m_Manager->getFileInfo(left.row());
        leftID = info->modID;
      }

      if (!m_Manager->isInfoIncomplete(right.row())) {
        const MOBase::ModRepositoryFileInfo *info = m_Manager->getFileInfo(right.row());
        rightID = info->modID;
      }

      return leftID < rightID;
    } else if (left.column() == DownloadList::COL_STATUS) {
      DownloadManager::DownloadState leftState = m_Manager->getState(left.row());
      DownloadManager::DownloadState rightState = m_Manager->getState(right.row());
      if (leftState == rightState)
        return m_Manager->getFileTime(left.row()) < m_Manager->getFileTime(right.row());
      else
        return leftState > rightState;
    } else if (left.column() == DownloadList::COL_SIZE) {
      return m_Manager->getFileSize(left.row()) < m_Manager->getFileSize(right.row());
    } else if (left.column() == DownloadList::COL_FILETIME) {
      return m_Manager->getFileTime(left.row()) < m_Manager->getFileTime(right.row());
    } else {
      return leftIndex < rightIndex;
    }
  } else {
    return leftIndex < rightIndex;
  }
}


bool DownloadListSortProxy::filterAcceptsRow(int sourceRow, const QModelIndex&) const
{
  if (m_CurrentFilter.length() == 0) {
    return true;
  } else if (sourceRow < m_Manager->numTotalDownloads()) {
    QString displayedName = Settings::instance().interface().metaDownloads()
        ? m_Manager->getDisplayName(sourceRow)
        : m_Manager->getFileName(sourceRow);
    return displayedName.contains(m_CurrentFilter, Qt::CaseInsensitive);
  } else {
    return false;
  }
}