/*
 * Bittorrent Client using Qt4 and libtorrent.
 * Copyright (C) 2006  Christophe Dumez
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link this program with the OpenSSL project's "OpenSSL" library (or with
 * modified versions of it that use the same license as the "OpenSSL" library),
 * and distribute the linked executables. You must obey the GNU General Public
 * License in all respects for all of the code used other than "OpenSSL".  If you
 * modify file(s), you may extend this exception to your version of the file(s),
 * but you are not obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 *
 * Contact : chris@qbittorrent.org
 */

#include <QString>
#include <QStringList>
#include <QFile>
#include <QDir>
#include <QByteArray>
#include "misc.h"
#include "qtorrenthandle.h"
#include <libtorrent/magnet_uri.hpp>

QTorrentHandle::QTorrentHandle(torrent_handle h): h(h) {}

//
// Getters
//

torrent_handle QTorrentHandle::get_torrent_handle() const {
  Q_ASSERT(h.is_valid());
  return h;
}

torrent_info QTorrentHandle::get_torrent_info() const {
  Q_ASSERT(h.is_valid());
  return h.get_torrent_info();
}

QString QTorrentHandle::hash() const {
  Q_ASSERT(h.is_valid());
  return misc::toQString(h.info_hash());
}

QString QTorrentHandle::name() const {
  Q_ASSERT(h.is_valid());
  return misc::toQString(h.name());
}

QString QTorrentHandle::creation_date() const {
  Q_ASSERT(h.is_valid());
  boost::optional<boost::posix_time::ptime> boostDate = h.get_torrent_info().creation_date();
  return misc::boostTimeToQString(boostDate);
}

float QTorrentHandle::progress() const {
  Q_ASSERT(h.is_valid());
  if(!h.status().total_wanted)
    return 0.;
  if (h.status().total_wanted_done == h.status().total_wanted)
    return 1.;
  float progress = (float)h.status().total_wanted_done/(float)h.status().total_wanted;
  Q_ASSERT(progress >= 0. && progress <= 1.);
  return progress;
}

bitfield QTorrentHandle::pieces() const {
  Q_ASSERT(h.is_valid());
  return h.status().pieces;
}

void QTorrentHandle::piece_availability(std::vector<int>& avail) const {
  Q_ASSERT(h.is_valid());
  h.piece_availability(avail);
}

void QTorrentHandle::get_download_queue(std::vector<partial_piece_info>& queue) const {
  Q_ASSERT(h.is_valid());
  h.get_download_queue(queue);
}

QString QTorrentHandle::current_tracker() const {
  Q_ASSERT(h.is_valid());
  return misc::toQString(h.status().current_tracker);
}

bool QTorrentHandle::is_valid() const {
  return h.is_valid();
}

bool QTorrentHandle::is_paused() const {
  Q_ASSERT(h.is_valid());
  return h.is_paused() && !h.is_auto_managed();
}

bool QTorrentHandle::is_queued() const {
  Q_ASSERT(h.is_valid());
  return h.is_paused() && h.is_auto_managed();
}

size_type QTorrentHandle::total_size() const {
  Q_ASSERT(h.is_valid());
  return h.get_torrent_info().total_size();
}

size_type QTorrentHandle::piece_length() const {
  Q_ASSERT(h.is_valid());
  return h.get_torrent_info().piece_length();
}

int QTorrentHandle::num_pieces() const {
  Q_ASSERT(h.is_valid());
  return h.get_torrent_info().num_pieces();
}

size_type QTorrentHandle::total_wanted_done() const {
  Q_ASSERT(h.is_valid());
  return h.status().total_wanted_done;
}

float QTorrentHandle::download_payload_rate() const {
  Q_ASSERT(h.is_valid());
  return h.status().download_payload_rate;
}

float QTorrentHandle::upload_payload_rate() const {
  Q_ASSERT(h.is_valid());
  return h.status().upload_payload_rate;
}

int QTorrentHandle::num_peers() const {
  Q_ASSERT(h.is_valid());
  return h.status().num_peers;
}

int QTorrentHandle::num_seeds() const {
  Q_ASSERT(h.is_valid());
  return h.status().num_seeds;
}

int QTorrentHandle::num_complete() const {
  Q_ASSERT(h.is_valid());
  return h.status().num_complete;
}

void QTorrentHandle::scrape_tracker() const {
  Q_ASSERT(h.is_valid());
  h.scrape_tracker();
}

int QTorrentHandle::num_incomplete() const {
  Q_ASSERT(h.is_valid());
  return h.status().num_incomplete;
}

QString QTorrentHandle::save_path() const {
  Q_ASSERT(h.is_valid());
  return misc::toQString(h.save_path().string());
}

bool QTorrentHandle::super_seeding() const {
  Q_ASSERT(h.is_valid());
  return h.super_seeding();
}

QStringList QTorrentHandle::url_seeds() const {
  Q_ASSERT(h.is_valid());
  QStringList res;
  try {
    std::vector<std::string> existing_seeds = h.get_torrent_info().url_seeds();
    unsigned int nbSeeds = existing_seeds.size();
    QString existing_seed;
    for(unsigned int i=0; i<nbSeeds; ++i) {
      res << misc::toQString(existing_seeds[i]);
    }
  } catch(std::exception e) {}
  return res;
}

// get the size of the torrent without the filtered files
size_type QTorrentHandle::actual_size() const{
  Q_ASSERT(h.is_valid());
  return h.status().total_wanted;
}

bool QTorrentHandle::has_filtered_pieces() const {
  Q_ASSERT(h.is_valid());
  std::vector<int> piece_priorities = h.piece_priorities();
  for(unsigned int i = 0; i<piece_priorities.size(); ++i) {
    if(!piece_priorities[i]) return true;
  }
  return false;
}

int QTorrentHandle::download_limit() const {
  Q_ASSERT(h.is_valid());
  return h.download_limit();
}

int QTorrentHandle::upload_limit() const {
  Q_ASSERT(h.is_valid());
  return h.upload_limit();
}

int QTorrentHandle::num_files() const {
  Q_ASSERT(h.is_valid());
  return h.get_torrent_info().num_files();
}

bool QTorrentHandle::has_metadata() const {
  Q_ASSERT(h.is_valid());
  return h.has_metadata();
}

void QTorrentHandle::save_resume_data() const {
  Q_ASSERT(h.is_valid());
  return h.save_resume_data();
}

QString QTorrentHandle::file_at(unsigned int index) const {
  Q_ASSERT(h.is_valid());
  Q_ASSERT(index < (unsigned int)h.get_torrent_info().num_files());
  return misc::toQString(h.get_torrent_info().file_at(index).path.leaf());
}

size_type QTorrentHandle::filesize_at(unsigned int index) const {
  Q_ASSERT(h.is_valid());
  Q_ASSERT(index < (unsigned int)h.get_torrent_info().num_files());
  return h.get_torrent_info().file_at(index).size;
}

std::vector<announce_entry> QTorrentHandle::trackers() const {
  Q_ASSERT(h.is_valid());
  return h.trackers();
}

torrent_status::state_t QTorrentHandle::state() const {
  Q_ASSERT(h.is_valid());
  return h.status().state;
}

std::vector<int> QTorrentHandle::file_priorities() const {
  Q_ASSERT(h.is_valid());
  return h.file_priorities();
}

QString QTorrentHandle::creator() const {
  Q_ASSERT(h.is_valid());
  return misc::toQString(h.get_torrent_info().creator());
}

QString QTorrentHandle::comment() const {
  Q_ASSERT(h.is_valid());
  return misc::toQString(h.get_torrent_info().comment());
}

size_type QTorrentHandle::total_failed_bytes() const {
  Q_ASSERT(h.is_valid());
  return h.status().total_failed_bytes;
}

size_type QTorrentHandle::total_redundant_bytes() const {
  Q_ASSERT(h.is_valid());
  return h.status().total_redundant_bytes;
}

void QTorrentHandle::file_progress(std::vector<size_type>& fp) {
  Q_ASSERT(h.is_valid());
  return h.file_progress(fp);
}

size_type QTorrentHandle::all_time_download() {
  Q_ASSERT(h.is_valid());
  return h.status().all_time_download;
}

size_type QTorrentHandle::all_time_upload() {
  Q_ASSERT(h.is_valid());
  return h.status().all_time_upload;
}

size_type QTorrentHandle::total_payload_download() {
  Q_ASSERT(h.is_valid());
  return h.status().total_payload_download;
}

size_type QTorrentHandle::total_payload_upload() {
  Q_ASSERT(h.is_valid());
  return h.status().total_payload_upload;
}

// Return a list of absolute paths corresponding
// to all files in a torrent
QStringList QTorrentHandle::files_path() const {
  Q_ASSERT(h.is_valid());
  QString saveDir = misc::toQString(h.save_path().string()) + QDir::separator();
  QStringList res;
  torrent_info::file_iterator fi = h.get_torrent_info().begin_files();
  while(fi != h.get_torrent_info().end_files()) {
    res << QDir::cleanPath(saveDir + misc::toQString(fi->path.string()));
    fi++;
  }
  return res;
}

int QTorrentHandle::queue_position() const {
  Q_ASSERT(h.is_valid());
  return h.queue_position();
}

int QTorrentHandle::num_uploads() const {
  Q_ASSERT(h.is_valid());
  return h.status().num_uploads;
}

bool QTorrentHandle::is_seed() const {
  Q_ASSERT(h.is_valid());
  // Affected by bug http://code.rasterbar.com/libtorrent/ticket/402
  //return h.is_seed();
  // May suffer from approximation problems
  //return (progress() == 1.);
  // This looks safe
  return (state() == torrent_status::finished || state() == torrent_status::seeding);
}

bool QTorrentHandle::is_auto_managed() const {
  Q_ASSERT(h.is_valid());
  return h.is_auto_managed();
}

qlonglong QTorrentHandle::active_time() const {
  Q_ASSERT(h.is_valid());
  return h.status().active_time;
}

qlonglong QTorrentHandle::seeding_time() const {
  Q_ASSERT(h.is_valid());
  return h.status().seeding_time;
}

int QTorrentHandle::num_connections() const {
  Q_ASSERT(h.is_valid());
  return h.status().num_connections;
}

int QTorrentHandle::connections_limit() const {
  Q_ASSERT(h.is_valid());
  return h.status().connections_limit;
}

bool QTorrentHandle::is_sequential_download() const {
  Q_ASSERT(h.is_valid());
  return h.is_sequential_download();
}

//
// Setters
//

void QTorrentHandle::set_download_limit(int limit) {
  Q_ASSERT(h.is_valid());
  h.set_download_limit(limit);
}

void QTorrentHandle::set_upload_limit(int limit) {
  Q_ASSERT(h.is_valid());
  h.set_upload_limit(limit);
}

void QTorrentHandle::pause() {
  Q_ASSERT(h.is_valid());
  h.auto_managed(false);
  h.pause();
  h.save_resume_data();
}

void QTorrentHandle::resume() {
  Q_ASSERT(h.is_valid());
  h.auto_managed(true);
  h.resume();
}

void QTorrentHandle::remove_url_seed(QString seed) {
  Q_ASSERT(h.is_valid());
  h.remove_url_seed(misc::toString((const char*)seed.toLocal8Bit()));
}

void QTorrentHandle::add_url_seed(QString seed) {
  Q_ASSERT(h.is_valid());
  h.add_url_seed(misc::toString((const char*)seed.toLocal8Bit()));
}

void QTorrentHandle::set_max_uploads(int val) {
  Q_ASSERT(h.is_valid());
  h.set_max_uploads(val);
}

void QTorrentHandle::set_max_connections(int val) {
  Q_ASSERT(h.is_valid());
  h.set_max_connections(val);
}

void QTorrentHandle::prioritize_files(std::vector<int> v) {
  Q_ASSERT(h.is_valid());
  h.prioritize_files(v);
}

void QTorrentHandle::set_ratio(float ratio) const {
  Q_ASSERT(h.is_valid());
  h.set_ratio(ratio);
}

void QTorrentHandle::replace_trackers(std::vector<announce_entry> const& v) const {
  Q_ASSERT(h.is_valid());
  h.replace_trackers(v);
}

void QTorrentHandle::auto_managed(bool b) const {
  Q_ASSERT(h.is_valid());
  h.auto_managed(b);
}

void QTorrentHandle::queue_position_down() const {
  Q_ASSERT(h.is_valid());
  h.queue_position_down();
}

void QTorrentHandle::queue_position_up() const {
  Q_ASSERT(h.is_valid());
  h.queue_position_up();

}

void QTorrentHandle::force_reannounce() {
  Q_ASSERT(h.is_valid());
  h.force_reannounce();
}

void QTorrentHandle::set_sequential_download(bool b) {
  Q_ASSERT(h.is_valid());
  h.set_sequential_download(b);
}

void QTorrentHandle::set_tracker_login(QString username, QString password) {
  Q_ASSERT(h.is_valid());
  h.set_tracker_login(std::string(username.toLocal8Bit().data()), std::string(password.toLocal8Bit().data()));
}

void QTorrentHandle::force_recheck() const {
  Q_ASSERT(h.is_valid());
  h.force_recheck();
}

void QTorrentHandle::move_storage(QString new_path) const {
  Q_ASSERT(h.is_valid());
  h.move_storage(new_path.toLocal8Bit().data());
}

void QTorrentHandle::file_priority(int index, int priority) const {
  Q_ASSERT(h.is_valid());
  h.file_priority(index, priority);
}

void QTorrentHandle::super_seeding(bool on) const {
  Q_ASSERT(h.is_valid());
  h.super_seeding(on);
}

//
// Operators
//

QTorrentHandle& QTorrentHandle::operator =(const torrent_handle& new_h) {
  h = new_h;
  return *this;
}

bool QTorrentHandle::operator ==(const QTorrentHandle& new_h) const{
  QString hash = misc::toQString(h.info_hash());
  return (hash == new_h.hash());
}