/*
 *  Copyright (C) 2005-2018 Team Kodi
 *  This file is part of Kodi - https://kodi.tv
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 *  See LICENSES/README.md for more information.
 */

#include "Scraper.h"

#include "FileItem.h"
#include "ServiceBroker.h"
#include "URL.h"
#include "Util.h"
#include "addons/AddonManager.h"
#include "addons/addoninfo/AddonInfo.h"
#include "addons/addoninfo/AddonType.h"
#include "addons/settings/AddonSettings.h"
#include "filesystem/CurlFile.h"
#include "filesystem/Directory.h"
#include "filesystem/File.h"
#include "filesystem/PluginDirectory.h"
#include "guilib/LocalizeStrings.h"
#include "music/Album.h"
#include "music/Artist.h"
#include "music/MusicDatabase.h"
#include "music/infoscanner/MusicAlbumInfo.h"
#include "music/infoscanner/MusicArtistInfo.h"
#include "settings/AdvancedSettings.h"
#include "settings/SettingsComponent.h"
#include "settings/SettingsValueFlatJsonSerializer.h"
#include "utils/CharsetConverter.h"
#include "utils/JSONVariantWriter.h"
#include "utils/ScraperParser.h"
#include "utils/ScraperUrl.h"
#include "utils/StringUtils.h"
#include "utils/URIUtils.h"
#include "utils/XMLUtils.h"
#include "utils/log.h"
#include "video/VideoDatabase.h"

#include <algorithm>
#include <sstream>

#include <fstrcmp.h>

using namespace XFILE;
using namespace MUSIC_GRABBER;
using namespace VIDEO;

namespace ADDON
{

typedef struct
{
  const char *name;
  CONTENT_TYPE type;
  int pretty;
} ContentMapping;

static const ContentMapping content[] = {{"unknown", CONTENT_NONE, 231},
                                         {"albums", CONTENT_ALBUMS, 132},
                                         {"music", CONTENT_ALBUMS, 132},
                                         {"artists", CONTENT_ARTISTS, 133},
                                         {"movies", CONTENT_MOVIES, 20342},
                                         {"tvshows", CONTENT_TVSHOWS, 20343},
                                         {"musicvideos", CONTENT_MUSICVIDEOS, 20389}};

std::string TranslateContent(const CONTENT_TYPE &type, bool pretty /*=false*/)
{
  for (const ContentMapping& map : content)
  {
    if (type == map.type)
    {
      if (pretty && map.pretty)
        return g_localizeStrings.Get(map.pretty);
      else
        return map.name;
    }
  }
  return "";
}

CONTENT_TYPE TranslateContent(const std::string &string)
{
  for (const ContentMapping& map : content)
  {
    if (string == map.name)
      return map.type;
  }
  return CONTENT_NONE;
}

AddonType ScraperTypeFromContent(const CONTENT_TYPE& content)
{
  switch (content)
  {
  case CONTENT_ALBUMS:
    return AddonType::SCRAPER_ALBUMS;
  case CONTENT_ARTISTS:
    return AddonType::SCRAPER_ARTISTS;
  case CONTENT_MOVIES:
    return AddonType::SCRAPER_MOVIES;
  case CONTENT_MUSICVIDEOS:
    return AddonType::SCRAPER_MUSICVIDEOS;
  case CONTENT_TVSHOWS:
    return AddonType::SCRAPER_TVSHOWS;
  default:
    return AddonType::UNKNOWN;
  }
}

// if the XML root is <error>, throw CScraperError with enclosed <title>/<message> values
static void CheckScraperError(const TiXmlElement *pxeRoot)
{
  if (!pxeRoot || StringUtils::CompareNoCase(pxeRoot->Value(), "error"))
    return;
  std::string sTitle;
  std::string sMessage;
  XMLUtils::GetString(pxeRoot, "title", sTitle);
  XMLUtils::GetString(pxeRoot, "message", sMessage);
  throw CScraperError(sTitle, sMessage);
}

CScraper::CScraper(const AddonInfoPtr& addonInfo, AddonType addonType)
  : CAddon(addonInfo, addonType)
{
  m_requiressettings = addonInfo->Type(addonType)->GetValue("@requiressettings").asBoolean();

  CDateTimeSpan persistence;
  std::string tmp = addonInfo->Type(addonType)->GetValue("@cachepersistence").asString();
  if (!tmp.empty())
    m_persistence.SetFromTimeString(tmp);

  switch (addonType)
  {
    case AddonType::SCRAPER_ALBUMS:
      m_pathContent = CONTENT_ALBUMS;
      break;
    case AddonType::SCRAPER_ARTISTS:
      m_pathContent = CONTENT_ARTISTS;
      break;
    case AddonType::SCRAPER_MOVIES:
      m_pathContent = CONTENT_MOVIES;
      break;
    case AddonType::SCRAPER_MUSICVIDEOS:
      m_pathContent = CONTENT_MUSICVIDEOS;
      break;
    case AddonType::SCRAPER_TVSHOWS:
      m_pathContent = CONTENT_TVSHOWS;
      break;
    default:
      break;
  }

  m_isPython = URIUtils::GetExtension(addonInfo->Type(addonType)->LibPath()) == ".py";
}

bool CScraper::Supports(const CONTENT_TYPE &content) const
{
  return Type() == ScraperTypeFromContent(content);
}

bool CScraper::SetPathSettings(CONTENT_TYPE content, const std::string &xml)
{
  m_pathContent = content;
  if (!LoadSettings(false, false))
    return false;

  if (xml.empty())
    return true;

  CXBMCTinyXML doc;
  doc.Parse(xml);
  return SettingsFromXML(doc, false);
}

std::string CScraper::GetPathSettings()
{
  if (!LoadSettings(false, true))
    return "";

  std::stringstream stream;
  CXBMCTinyXML doc;
  SettingsToXML(doc);
  if (doc.RootElement())
    stream << *doc.RootElement();

  return stream.str();
}

void CScraper::ClearCache()
{
  std::string strCachePath = URIUtils::AddFileToFolder(CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_cachePath, "scrapers");

  // create scraper cache dir if needed
  if (!CDirectory::Exists(strCachePath))
    CDirectory::Create(strCachePath);

  strCachePath = URIUtils::AddFileToFolder(strCachePath, ID());
  URIUtils::AddSlashAtEnd(strCachePath);

  if (CDirectory::Exists(strCachePath))
  {
    CFileItemList items;
    CDirectory::GetDirectory(strCachePath, items, "", DIR_FLAG_DEFAULTS);
    for (int i = 0; i < items.Size(); ++i)
    {
      // wipe cache
      if (items[i]->m_dateTime + m_persistence <= CDateTime::GetCurrentDateTime())
        CFile::Delete(items[i]->GetDynPath());
    }
  }
  else
    CDirectory::Create(strCachePath);
}

// returns a vector of strings: the first is the XML output by the function; the rest
// is XML output by chained functions, possibly recursively
// the CCurlFile object is passed in so that URL fetches can be canceled from other threads
// throws CScraperError abort on internal failures (e.g., parse errors)
std::vector<std::string> CScraper::Run(const std::string &function,
                                       const CScraperUrl &scrURL,
                                       CCurlFile &http,
                                       const std::vector<std::string> *extras)
{
  if (!Load())
    throw CScraperError();

  std::string strXML = InternalRun(function, scrURL, http, extras);
  if (strXML.empty())
  {
    if (function != "NfoUrl" && function != "ResolveIDToUrl")
      CLog::Log(LOGERROR, "{}: Unable to parse web site", __FUNCTION__);
    throw CScraperError();
  }

  CLog::Log(LOGDEBUG, "scraper: {} returned {}", function, strXML);

  CXBMCTinyXML doc;
  /* all data was converted to UTF-8 before being processed by scraper */
  doc.Parse(strXML, TIXML_ENCODING_UTF8);
  if (!doc.RootElement())
  {
    CLog::Log(LOGERROR, "{}: Unable to parse XML", __FUNCTION__);
    throw CScraperError();
  }

  std::vector<std::string> result;
  result.push_back(strXML);
  TiXmlElement *xchain = doc.RootElement()->FirstChildElement();
  // skip children of the root element until <url> or <chain>
  while (xchain && strcmp(xchain->Value(), "url") && strcmp(xchain->Value(), "chain"))
    xchain = xchain->NextSiblingElement();
  while (xchain)
  {
    // <chain|url function="...">param</>
    const char *szFunction = xchain->Attribute("function");
    if (szFunction)
    {
      CScraperUrl scrURL2;
      std::vector<std::string> extras;
      // for <chain>, pass the contained text as a parameter; for <url>, as URL content
      if (strcmp(xchain->Value(), "chain") == 0)
      {
        if (xchain->FirstChild())
          extras.emplace_back(xchain->FirstChild()->Value());
      }
      else
        scrURL2.ParseAndAppendUrl(xchain);
      // Fix for empty chains. $$1 would still contain the
      // previous value as there is no child of the xml node.
      // since $$1 will always either contain the data from an
      // url or the parameters to a chain, we can safely clear it here
      // to fix this issue
      m_parser.m_param[0].clear();
      std::vector<std::string> result2 = RunNoThrow(szFunction, scrURL2, http, &extras);
      result.insert(result.end(), result2.begin(), result2.end());
    }
    xchain = xchain->NextSiblingElement();
    // continue to skip past non-<url> or <chain> elements
    while (xchain && strcmp(xchain->Value(), "url") && strcmp(xchain->Value(), "chain"))
      xchain = xchain->NextSiblingElement();
  }

  return result;
}

// just like Run, but returns an empty list instead of throwing in case of error
// don't use in new code; errors should be handled appropriately
std::vector<std::string> CScraper::RunNoThrow(const std::string &function,
                                              const CScraperUrl &url,
                                              XFILE::CCurlFile &http,
                                              const std::vector<std::string> *extras)
{
  std::vector<std::string> vcs;
  try
  {
    vcs = Run(function, url, http, extras);
  }
  catch (const CScraperError &sce)
  {
    assert(sce.FAborted()); // the only kind we should get
  }
  return vcs;
}

std::string CScraper::InternalRun(const std::string &function,
                                  const CScraperUrl &scrURL,
                                  CCurlFile &http,
                                  const std::vector<std::string> *extras)
{
  // walk the list of input URLs and fetch each into parser parameters
  const auto& urls = scrURL.GetUrls();
  size_t i;
  for (i = 0; i < urls.size(); ++i)
  {
    if (!CScraperUrl::Get(urls[i], m_parser.m_param[i], http, ID()) ||
        m_parser.m_param[i].empty())
      return "";
  }
  // put the 'extra' parameters into the parser parameter list too
  if (extras)
  {
    for (size_t j = 0; j < extras->size(); ++j)
      m_parser.m_param[j + i] = (*extras)[j];
  }

  return m_parser.Parse(function, this);
}

std::string CScraper::GetPathSettingsAsJSON()
{
  static const std::string EmptyPathSettings = "{}";

  if (!LoadSettings(false, true))
    return EmptyPathSettings;

  CSettingsValueFlatJsonSerializer jsonSerializer;
  auto json = jsonSerializer.SerializeValues(GetSettings()->GetSettingsManager());
  if (json.empty())
    return EmptyPathSettings;

  return json;
}

bool CScraper::Load()
{
  if (m_fLoaded || m_isPython)
    return true;

  bool result = m_parser.Load(LibPath());
  if (result)
  {
    //! @todo this routine assumes that deps are a single level, and assumes the dep is installed.
    //!       1. Does it make sense to have recursive dependencies?
    //!       2. Should we be checking the dep versions or do we assume it is ok?
    auto deps = GetDependencies();
    auto itr = deps.begin();
    while (itr != deps.end())
    {
      if (itr->id == "xbmc.metadata")
      {
        ++itr;
        continue;
      }
      AddonPtr dep;

      bool bOptional = itr->optional;

      if (CServiceBroker::GetAddonMgr().GetAddon((*itr).id, dep, ADDON::OnlyEnabled::CHOICE_YES))
      {
        CXBMCTinyXML doc;
        if (dep->Type() == AddonType::SCRAPER_LIBRARY && doc.LoadFile(dep->LibPath()))
          m_parser.AddDocument(&doc);
      }
      else
      {
        if (!bOptional)
        {
          result = false;
          break;
        }
      }
      ++itr;
    }
  }

  if (!result)
    CLog::Log(LOGWARNING, "failed to load scraper XML from {}", LibPath());
  return m_fLoaded = result;
}

bool CScraper::IsInUse() const
{
  if (Supports(CONTENT_ALBUMS) || Supports(CONTENT_ARTISTS))
  { // music scraper
    CMusicDatabase db;
    if (db.Open() && db.ScraperInUse(ID()))
      return true;
  }
  else
  { // video scraper
    CVideoDatabase db;
    if (db.Open() && db.ScraperInUse(ID()))
      return true;
  }
  return false;
}

bool CScraper::IsNoop()
{
  if (!Load())
    throw CScraperError();

  return !m_isPython && m_parser.IsNoop();
}

// pass in contents of .nfo file; returns URL (possibly empty if none found)
// and may populate strId, or throws CScraperError on error
CScraperUrl CScraper::NfoUrl(const std::string &sNfoContent)
{
  CScraperUrl scurlRet;

  if (IsNoop())
    return scurlRet;

  if (m_isPython)
  {
    std::stringstream str;
    str << "plugin://" << ID() << "?action=NfoUrl&nfo=" << CURL::Encode(sNfoContent)
        << "&pathSettings=" << CURL::Encode(GetPathSettingsAsJSON());

    CFileItemList items;
    if (!XFILE::CDirectory::GetDirectory(str.str(), items, "", DIR_FLAG_DEFAULTS))
      return scurlRet;

    if (items.Size() == 0)
      return scurlRet;
    if (items.Size() > 1)
      CLog::Log(LOGWARNING, "{}: scraper returned multiple results; using first", __FUNCTION__);

    CScraperUrl::SUrlEntry surl;
    surl.m_type = CScraperUrl::UrlType::General;
    surl.m_url = items[0]->GetDynPath();
    scurlRet.AppendUrl(surl);
    return scurlRet;
  }

  // scraper function takes contents of .nfo file, returns XML (see below)
  std::vector<std::string> vcsIn;
  vcsIn.push_back(sNfoContent);
  CScraperUrl scurl;
  CCurlFile fcurl;
  std::vector<std::string> vcsOut = Run("NfoUrl", scurl, fcurl, &vcsIn);
  if (vcsOut.empty() || vcsOut[0].empty())
    return scurlRet;
  if (vcsOut.size() > 1)
    CLog::Log(LOGWARNING, "{}: scraper returned multiple results; using first", __FUNCTION__);

  // parse returned XML: either <error> element on error, blank on failure,
  // or <url>...</url> or <url>...</url><id>...</id> on success
  for (size_t i = 0; i < vcsOut.size(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(vcsOut[i], TIXML_ENCODING_UTF8);
    CheckScraperError(doc.RootElement());

    if (doc.RootElement())
    {
      /*
       NOTE: Scrapers might return invalid xml with some loose
       elements (eg. '<url>http://some.url</url><id>123</id>').
       Since XMLUtils::GetString() is assuming well formed xml
       with start and end-tags we're not able to use it.
       Check for the desired Elements instead.
      */
      TiXmlElement* pxeUrl = nullptr;
      TiXmlElement* pId = nullptr;
      if (!strcmp(doc.RootElement()->Value(), "details"))
      {
        pxeUrl = doc.RootElement()->FirstChildElement("url");
        pId = doc.RootElement()->FirstChildElement("id");
      }
      else
      {
        pId = doc.FirstChildElement("id");
        pxeUrl = doc.FirstChildElement("url");
      }
      if (pId && pId->FirstChild())
        scurlRet.SetId(pId->FirstChild()->ValueStr());

      if (pxeUrl && pxeUrl->Attribute("function"))
        continue;

      if (pxeUrl)
        scurlRet.ParseAndAppendUrl(pxeUrl);
      else if (!strcmp(doc.RootElement()->Value(), "url"))
        scurlRet.ParseAndAppendUrl(doc.RootElement());
      else
        continue;
      break;
    }
  }
  return scurlRet;
}

CScraperUrl CScraper::ResolveIDToUrl(const std::string &externalID)
{
  CScraperUrl scurlRet;

  if (m_isPython)
  {
    std::stringstream str;
    str << "plugin://" << ID() << "?action=resolveid&key=" << CURL::Encode(externalID)
        << "&pathSettings=" << CURL::Encode(GetPathSettingsAsJSON());

    CFileItem item("resolve me", false);

    if (XFILE::CPluginDirectory::GetPluginResult(str.str(), item, false))
      scurlRet.ParseFromData(item.GetDynPath());

    return scurlRet;
  }

  // scraper function takes an external ID, returns XML (see below)
  std::vector<std::string> vcsIn;
  vcsIn.push_back(externalID);
  CScraperUrl scurl;
  CCurlFile fcurl;
  std::vector<std::string> vcsOut = Run("ResolveIDToUrl", scurl, fcurl, &vcsIn);
  if (vcsOut.empty() || vcsOut[0].empty())
    return scurlRet;
  if (vcsOut.size() > 1)
    CLog::Log(LOGWARNING, "{}: scraper returned multiple results; using first", __FUNCTION__);

  // parse returned XML: either <error> element on error, blank on failure,
  // or <url>...</url> or <url>...</url><id>...</id> on success
  for (size_t i = 0; i < vcsOut.size(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(vcsOut[i], TIXML_ENCODING_UTF8);
    CheckScraperError(doc.RootElement());

    if (doc.RootElement())
    {
      /*
       NOTE: Scrapers might return invalid xml with some loose
       elements (eg. '<url>http://some.url</url><id>123</id>').
       Since XMLUtils::GetString() is assuming well formed xml
       with start and end-tags we're not able to use it.
       Check for the desired Elements instead.
       */
      TiXmlElement* pxeUrl = nullptr;
      TiXmlElement* pId = nullptr;
      if (!strcmp(doc.RootElement()->Value(), "details"))
      {
        pxeUrl = doc.RootElement()->FirstChildElement("url");
        pId = doc.RootElement()->FirstChildElement("id");
      }
      else
      {
        pId = doc.FirstChildElement("id");
        pxeUrl = doc.FirstChildElement("url");
      }
      if (pId && pId->FirstChild())
        scurlRet.SetId(pId->FirstChild()->ValueStr());

      if (pxeUrl && pxeUrl->Attribute("function"))
        continue;

      if (pxeUrl)
        scurlRet.ParseAndAppendUrl(pxeUrl);
      else if (!strcmp(doc.RootElement()->Value(), "url"))
        scurlRet.ParseAndAppendUrl(doc.RootElement());
      else
        continue;
      break;
    }
  }
  return scurlRet;
}

static bool RelevanceSortFunction(const CScraperUrl &left, const CScraperUrl &right)
{
  return left.GetRelevance() > right.GetRelevance();
}

template<class T>
static T FromFileItem(const CFileItem &item);

template<>
CScraperUrl FromFileItem<CScraperUrl>(const CFileItem &item)
{
  CScraperUrl url;

  url.SetTitle(item.GetLabel());
  if (item.HasProperty("relevance"))
    url.SetRelevance(item.GetProperty("relevance").asDouble());
  CScraperUrl::SUrlEntry surl;
  surl.m_type = CScraperUrl::UrlType::General;
  surl.m_url = item.GetDynPath();
  url.AppendUrl(surl);

  return url;
}

template<>
CMusicAlbumInfo FromFileItem<CMusicAlbumInfo>(const CFileItem &item)
{
  CMusicAlbumInfo info;
  const std::string& sTitle = item.GetLabel();
  std::string sArtist = item.GetProperty("album.artist").asString();
  std::string sAlbumName;
  if (!sArtist.empty())
    sAlbumName = StringUtils::Format("{} - {}", sArtist, sTitle);
  else
    sAlbumName = sTitle;

  CScraperUrl url;
  url.AppendUrl(CScraperUrl::SUrlEntry(item.GetDynPath()));

  info = CMusicAlbumInfo(sTitle, sArtist, sAlbumName, url);
  if (item.HasProperty("relevance"))
    info.SetRelevance(item.GetProperty("relevance").asFloat());

  if (item.HasProperty("album.releasestatus"))
    info.GetAlbum().strReleaseStatus = item.GetProperty("album.releasestatus").asString();
  if (item.HasProperty("album.type"))
    info.GetAlbum().strType = item.GetProperty("album.type").asString();
  if (item.HasProperty("album.year"))
    info.GetAlbum().strReleaseDate = item.GetProperty("album.year").asString();
  if (item.HasProperty("album.label"))
    info.GetAlbum().strLabel = item.GetProperty("album.label").asString();
  info.GetAlbum().art = item.GetArt();

  return info;
}

template<>
CMusicArtistInfo FromFileItem<CMusicArtistInfo>(const CFileItem &item)
{
  CMusicArtistInfo info;
  const std::string& sTitle = item.GetLabel();

  CScraperUrl url;
  url.AppendUrl(CScraperUrl::SUrlEntry(item.GetDynPath()));

  info = CMusicArtistInfo(sTitle, url);
  if (item.HasProperty("artist.genre"))
    info.GetArtist().genre = StringUtils::Split(item.GetProperty("artist.genre").asString(),
                                                CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_musicItemSeparator);
  if (item.HasProperty("artist.disambiguation"))
    info.GetArtist().strDisambiguation = item.GetProperty("artist.disambiguation").asString();
  if (item.HasProperty("artist.type"))
    info.GetArtist().strType = item.GetProperty("artist.type").asString();
  if (item.HasProperty("artist.gender"))
    info.GetArtist().strGender = item.GetProperty("artist.gender").asString();
  if (item.HasProperty("artist.born"))
    info.GetArtist().strBorn = item.GetProperty("artist.born").asString();

  return info;
}

template<class T>
static std::vector<T> PythonFind(const std::string &ID,
                                 const std::map<std::string, std::string> &additionals)
{
  std::vector<T> result;
  CFileItemList items;
  std::stringstream str;
  str << "plugin://" << ID << "?action=find";
  for (const auto &it : additionals)
    str << "&" << it.first << "=" << CURL::Encode(it.second);

  if (XFILE::CDirectory::GetDirectory(str.str(), items, "", DIR_FLAG_DEFAULTS))
  {
    for (const auto& it : items)
      result.emplace_back(std::move(FromFileItem<T>(*it)));
  }

  return result;
}

static std::string FromString(const CFileItem &item, const std::string &key)
{
  return item.GetProperty(key).asString();
}

static std::vector<std::string> FromArray(const CFileItem &item, const std::string &key, int sep)
{
  return StringUtils::Split(item.GetProperty(key).asString(),
                            sep ? CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_videoItemSeparator
                                : CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_musicItemSeparator);
}

static void ParseThumbs(CScraperUrl &scurl,
                        const CFileItem &item,
                        int nThumbs,
                        const std::string &tag)
{
  for (int i = 0; i < nThumbs; ++i)
  {
    std::stringstream prefix;
    prefix << tag << i + 1;
    std::string url = FromString(item, prefix.str() + ".url");
    std::string aspect = FromString(item, prefix.str() + ".aspect");
    std::string preview = FromString(item, prefix.str() + ".preview");
    scurl.AddParsedUrl(url, aspect, preview);
  }
}

static std::string ParseFanart(const CFileItem &item, int nFanart, const std::string &tag)
{
  std::string result;
  TiXmlElement fanart("fanart");
  for (int i = 0; i < nFanart; ++i)
  {
    std::stringstream prefix;
    prefix << tag << i + 1;
    std::string url = FromString(item, prefix.str() + ".url");
    std::string preview = FromString(item, prefix.str() + ".preview");
    TiXmlElement thumb("thumb");
    thumb.SetAttribute("preview", preview);
    TiXmlText text(url);
    thumb.InsertEndChild(text);
    fanart.InsertEndChild(thumb);
  }
  result << fanart;

  return result;
}

template<class T>
static bool DetailsFromFileItem(const CFileItem&, T&);

template<>
bool DetailsFromFileItem<CAlbum>(const CFileItem& item, CAlbum& album)
{
  album.strAlbum = item.GetLabel();
  album.strMusicBrainzAlbumID = FromString(item, "album.musicbrainzid");
  album.strReleaseGroupMBID = FromString(item, "album.releasegroupid");

  int nArtists = item.GetProperty("album.artists").asInteger32();
  album.artistCredits.reserve(nArtists);
  for (int i = 0; i < nArtists; ++i)
  {
    std::stringstream prefix;
    prefix << "album.artist" << i + 1;
    CArtistCredit artistCredit;
    artistCredit.SetArtist(FromString(item, prefix.str() + ".name"));
    artistCredit.SetMusicBrainzArtistID(FromString(item, prefix.str() + ".musicbrainzid"));
    album.artistCredits.push_back(artistCredit);
  }

  album.strArtistDesc = FromString(item, "album.artist_description");
  album.genre = FromArray(item, "album.genre", 0);
  album.styles = FromArray(item, "album.styles", 0);
  album.moods = FromArray(item, "album.moods", 0);
  album.themes = FromArray(item, "album.themes", 0);
  album.bCompilation = item.GetProperty("album.compilation").asBoolean();
  album.strReview = FromString(item, "album.review");
  album.strReleaseDate = FromString(item, "album.releasedate");
  if (album.strReleaseDate.empty())
    album.strReleaseDate = FromString(item, "album.year");
  album.strOrigReleaseDate = FromString(item, "album.originaldate");
  album.strLabel = FromString(item, "album.label");
  album.strType = FromString(item, "album.type");
  album.strReleaseStatus = FromString(item, "album.releasestatus");
  album.fRating = item.GetProperty("album.rating").asFloat();
  album.iUserrating = item.GetProperty("album.user_rating").asInteger32();
  album.iVotes = item.GetProperty("album.votes").asInteger32();
  
  /* Scrapers fetch a list of possible art but do not set the current images used because art
     selection depends on other preferences so is handled by CMusicInfoScanner
     album.art = item.GetArt();
  */

  int nThumbs = item.GetProperty("album.thumbs").asInteger32();
  ParseThumbs(album.thumbURL, item, nThumbs, "album.thumb");
  return true;
}

template<>
bool DetailsFromFileItem<CArtist>(const CFileItem& item, CArtist& artist)
{
  artist.strArtist = item.GetLabel();
  artist.strMusicBrainzArtistID = FromString(item, "artist.musicbrainzid");
  artist.strDisambiguation = FromString(item, "artist.disambiguation");
  artist.strType = FromString(item, "artist.type");
  artist.strGender = FromString(item, "artist.gender");
  artist.genre = FromArray(item, "artist.genre", 0);
  artist.styles = FromArray(item, "artist.styles", 0);
  artist.moods = FromArray(item, "artist.moods", 0);
  artist.yearsActive = FromArray(item, "artist.years_active", 0);
  artist.instruments = FromArray(item, "artist.instruments", 0);
  artist.strBorn = FromString(item, "artist.born");
  artist.strFormed = FromString(item, "artist.formed");
  artist.strBiography = FromString(item, "artist.biography");
  artist.strDied = FromString(item, "artist.died");
  artist.strDisbanded = FromString(item, "artist.disbanded");

  /* Scrapers fetch a list of possible art but do not set the current images used because art
     selection depends on other preferences so is handled by CMusicInfoScanner
     artist.art = item.GetArt();
  */

  int nAlbums = item.GetProperty("artist.albums").asInteger32();
  artist.discography.reserve(nAlbums);
  for (int i = 0; i < nAlbums; ++i)
  {
    std::stringstream prefix;
    prefix << "artist.album" << i + 1;
    CDiscoAlbum discoAlbum;
    discoAlbum.strAlbum = FromString(item, prefix.str() + ".title");
    discoAlbum.strYear = FromString(item, prefix.str() + ".year");
    discoAlbum.strReleaseGroupMBID = FromString(item, prefix.str() + ".musicbrainzreleasegroupid");
    artist.discography.emplace_back(discoAlbum);
  }

  const int numvideolinks = item.GetProperty("artist.videolinks").asInteger32();
  if (numvideolinks > 0)
  {
    artist.videolinks.reserve(numvideolinks);
    for (int i = 1; i <= numvideolinks; ++i)
    {
      std::stringstream prefix;
      prefix << "artist.videolink" << i;
      ArtistVideoLinks videoLink;
      videoLink.title = FromString(item, prefix.str() + ".title");
      videoLink.mbTrackID = FromString(item, prefix.str() + ".mbtrackid");
      videoLink.videoURL = FromString(item, prefix.str() + ".url");
      videoLink.thumbURL = FromString(item, prefix.str() + ".thumb");
      artist.videolinks.emplace_back(std::move(videoLink));
    }
  }

  int nThumbs = item.GetProperty("artist.thumbs").asInteger32();
  ParseThumbs(artist.thumbURL, item, nThumbs, "artist.thumb");

  // Support deprecated fanarts property, add to artist.thumbURL
  int nFanart = item.GetProperty("artist.fanarts").asInteger32();
  if (nFanart > 0)
  {
    CFanart fanart;
    fanart.m_xml = ParseFanart(item, nFanart, "artist.fanart");
    fanart.Unpack();
    for (unsigned int i = 0; i < fanart.GetNumFanarts(); i++)
      artist.thumbURL.AddParsedUrl(fanart.GetImageURL(i), "fanart", fanart.GetPreviewURL(i));
  }
  return true;
}

template<>
bool DetailsFromFileItem<CVideoInfoTag>(const CFileItem& item, CVideoInfoTag& tag)
{
  if (item.HasVideoInfoTag())
  {
    tag = *item.GetVideoInfoTag();
    return true;
  }
  return false;
}

template<class T>
static bool PythonDetails(const std::string& ID,
                          const std::string& key,
                          const std::string& url,
                          const std::string& action,
                          const std::string& pathSettings,
                          const std::unordered_map<std::string, std::string>& uniqueIDs,
                          T& result)
{
  CVariant ids;
  for (const auto& [identifierType, identifier] : uniqueIDs)
    ids[identifierType] = identifier;
  std::string uids;
  CJSONVariantWriter::Write(ids, uids, true);
  std::stringstream str;
  str << "plugin://" << ID << "?action=" << action << "&" << key << "=" << CURL::Encode(url);
  str << "&pathSettings=" << CURL::Encode(pathSettings);
  if (!uniqueIDs.empty())
    str << "&uniqueIDs=" << CURL::Encode(uids);

  CFileItem item(url, false);

  if (!XFILE::CPluginDirectory::GetPluginResult(str.str(), item, false))
    return false;

  return DetailsFromFileItem(item, result);
}

template<class T>
static bool PythonDetails(const std::string& ID,
                          const std::string& key,
                          const std::string& url,
                          const std::string& action,
                          const std::string& pathSettings,
                          T& result)
{
  const std::unordered_map<std::string, std::string> ids;
  return PythonDetails(ID, key, url, action, pathSettings, ids, result);
}

// fetch list of matching movies sorted by relevance (may be empty);
// throws CScraperError on error; first called with fFirst set, then unset if first try fails
std::vector<CScraperUrl> CScraper::FindMovie(XFILE::CCurlFile &fcurl,
                                             const std::string &movieTitle, int movieYear,
                                             bool fFirst)
{
  // prepare parameters for URL creation
  std::string sTitle, sYear;
  if (movieYear < 0)
  {
    std::string sTitleYear;
    CUtil::CleanString(movieTitle, sTitle, sTitleYear, sYear, true /*fRemoveExt*/, fFirst);
  }
  else
  {
    sTitle = movieTitle;
    sYear = std::to_string( movieYear );
  }

  CLog::Log(LOGDEBUG,
            "{}: Searching for '{}' using {} scraper "
            "(path: '{}', content: '{}', version: '{}')",
            __FUNCTION__, sTitle, Name(), Path(), ADDON::TranslateContent(Content()),
            Version().asString());

  std::vector<CScraperUrl> vcscurl;
  if (IsNoop())
    return vcscurl;

  if (!fFirst)
    StringUtils::Replace(sTitle, '-', ' ');

  if (m_isPython)
  {
    std::map<std::string, std::string> additionals{{"title", sTitle}};
    if (!sYear.empty())
      additionals.insert({"year", sYear});
    additionals.emplace("pathSettings", GetPathSettingsAsJSON());
    return PythonFind<CScraperUrl>(ID(), additionals);
  }

  std::vector<std::string> vcsIn(1);
  g_charsetConverter.utf8To(SearchStringEncoding(), sTitle, vcsIn[0]);
  vcsIn[0] = CURL::Encode(vcsIn[0]);
  if (fFirst && !sYear.empty())
    vcsIn.push_back(sYear);

  // request a search URL from the title/filename/etc.
  CScraperUrl scurl;
  std::vector<std::string> vcsOut = Run("CreateSearchUrl", scurl, fcurl, &vcsIn);
  if (vcsOut.empty())
  {
    CLog::Log(LOGDEBUG, "{}: CreateSearchUrl failed", __FUNCTION__);
    throw CScraperError();
  }
  scurl.ParseFromData(vcsOut[0]);

  // do the search, and parse the result into a list
  vcsIn.clear();
  vcsIn.push_back(scurl.GetFirstThumbUrl());
  vcsOut = Run("GetSearchResults", scurl, fcurl, &vcsIn);

  bool fSort(true);
  std::set<std::string> stsDupeCheck;
  bool fResults(false);
  for (std::vector<std::string>::const_iterator i = vcsOut.begin(); i != vcsOut.end(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(*i, TIXML_ENCODING_UTF8);
    if (!doc.RootElement())
    {
      CLog::Log(LOGERROR, "{}: Unable to parse XML", __FUNCTION__);
      continue; // might have more valid results later
    }

    CheckScraperError(doc.RootElement());

    TiXmlHandle xhDoc(&doc);
    TiXmlHandle xhResults = xhDoc.FirstChild("results");
    if (!xhResults.Element())
      continue;
    fResults = true; // even if empty

    // we need to sort if returned results don't specify 'sorted="yes"'
    if (fSort)
    {
      const char *sorted = xhResults.Element()->Attribute("sorted");
      if (sorted != nullptr)
        fSort = !StringUtils::EqualsNoCase(sorted, "yes");
    }

    for (TiXmlElement *pxeMovie = xhResults.FirstChild("entity").Element(); pxeMovie;
         pxeMovie = pxeMovie->NextSiblingElement())
    {
      TiXmlNode *pxnTitle = pxeMovie->FirstChild("title");
      TiXmlElement *pxeLink = pxeMovie->FirstChildElement("url");
      if (pxnTitle && pxnTitle->FirstChild() && pxeLink && pxeLink->FirstChild())
      {
        CScraperUrl scurlMovie;
        auto title = pxnTitle->FirstChild()->ValueStr();
        std::string id;
        if (XMLUtils::GetString(pxeMovie, "id", id))
          scurlMovie.SetId(id);

        for (; pxeLink && pxeLink->FirstChild(); pxeLink = pxeLink->NextSiblingElement("url"))
          scurlMovie.ParseAndAppendUrl(pxeLink);

        // calculate the relevance of this hit
        std::string sCompareTitle = scurlMovie.GetTitle();
        StringUtils::ToLower(sCompareTitle);
        std::string sMatchTitle = sTitle;
        StringUtils::ToLower(sMatchTitle);

        /*
         * Identify the best match by performing a fuzzy string compare on the search term and
         * the result. Additionally, use the year (if available) to further refine the best match.
         * An exact match scores 1, a match off by a year scores 0.5 (release dates can vary between
         * countries), otherwise it scores 0.
         */
        std::string sCompareYear;
        XMLUtils::GetString(pxeMovie, "year", sCompareYear);

        double yearScore = 0;
        if (!sYear.empty() && !sCompareYear.empty())
          yearScore =
              std::max(0.0, 1 - 0.5 * abs(atoi(sYear.c_str()) - atoi(sCompareYear.c_str())));

        scurlMovie.SetRelevance(fstrcmp(sMatchTitle.c_str(), sCompareTitle.c_str()) + yearScore);

        // reconstruct a title for the user
        if (!sCompareYear.empty())
          title += StringUtils::Format(" ({})", sCompareYear);

        std::string sLanguage;
        if (XMLUtils::GetString(pxeMovie, "language", sLanguage) && !sLanguage.empty())
          title += StringUtils::Format(" ({})", sLanguage);

        // filter for dupes from naughty scrapers
        if (stsDupeCheck.insert(scurlMovie.GetFirstThumbUrl() + " " + title).second)
        {
          scurlMovie.SetTitle(title);
          vcscurl.push_back(scurlMovie);
        }
      }
    }
  }

  if (!fResults)
    throw CScraperError(); // scraper aborted

  if (fSort)
    std::stable_sort(vcscurl.begin(), vcscurl.end(), RelevanceSortFunction);

  return vcscurl;
}

// find album by artist, using fcurl for web fetches
// returns a list of albums (empty if no match or failure)
std::vector<CMusicAlbumInfo> CScraper::FindAlbum(CCurlFile &fcurl,
                                                 const std::string &sAlbum,
                                                 const std::string &sArtist)
{
  CLog::Log(LOGDEBUG,
            "{}: Searching for '{} - {}' using {} scraper "
            "(path: '{}', content: '{}', version: '{}')",
            __FUNCTION__, sArtist, sAlbum, Name(), Path(), ADDON::TranslateContent(Content()),
            Version().asString());

  std::vector<CMusicAlbumInfo> vcali;
  if (IsNoop())
    return vcali;

  if (m_isPython)
    return PythonFind<CMusicAlbumInfo>(ID(),
      {{"title", sAlbum}, {"artist", sArtist}, {"pathSettings", GetPathSettingsAsJSON()}});

  // scraper function is given the album and artist as parameters and
  // returns an XML <url> element parseable by CScraperUrl
  std::vector<std::string> extras(2);
  g_charsetConverter.utf8To(SearchStringEncoding(), sAlbum, extras[0]);
  g_charsetConverter.utf8To(SearchStringEncoding(), sArtist, extras[1]);
  extras[0] = CURL::Encode(extras[0]);
  extras[1] = CURL::Encode(extras[1]);
  CScraperUrl scurl;
  std::vector<std::string> vcsOut = RunNoThrow("CreateAlbumSearchUrl", scurl, fcurl, &extras);
  if (vcsOut.size() > 1)
    CLog::Log(LOGWARNING, "{}: scraper returned multiple results; using first", __FUNCTION__);

  if (vcsOut.empty() || vcsOut[0].empty())
    return vcali;
  scurl.ParseFromData(vcsOut[0]);

  // the next function is passed the contents of the returned URL, and returns
  // an empty string on failure; on success, returns XML matches in the form:
  // <results>
  //  <entity>
  //   <title>...</title>
  //   <url>...</url> (with the usual CScraperUrl decorations like post or spoof)
  //   <artist>...</artist>
  //   <year>...</year>
  //   <relevance [scale="..."]>...</relevance> (scale defaults to 1; score is divided by it)
  //  </entity>
  //  ...
  // </results>
  vcsOut = RunNoThrow("GetAlbumSearchResults", scurl, fcurl);

  // parse the returned XML into a vector of album objects
  for (std::vector<std::string>::const_iterator i = vcsOut.begin(); i != vcsOut.end(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(*i, TIXML_ENCODING_UTF8);
    TiXmlHandle xhDoc(&doc);

    for (TiXmlElement *pxeAlbum = xhDoc.FirstChild("results").FirstChild("entity").Element();
         pxeAlbum; pxeAlbum = pxeAlbum->NextSiblingElement())
    {
      std::string sTitle;
      if (XMLUtils::GetString(pxeAlbum, "title", sTitle) && !sTitle.empty())
      {
        std::string sArtist;
        std::string sAlbumName;
        if (XMLUtils::GetString(pxeAlbum, "artist", sArtist) && !sArtist.empty())
          sAlbumName = StringUtils::Format("{} - {}", sArtist, sTitle);
        else
          sAlbumName = sTitle;

        std::string sYear;
        if (XMLUtils::GetString(pxeAlbum, "year", sYear) && !sYear.empty())
          sAlbumName = StringUtils::Format("{} ({})", sAlbumName, sYear);

        // if no URL is provided, use the URL we got back from CreateAlbumSearchUrl
        // (e.g., in case we only got one result back and were sent to the detail page)
        TiXmlElement *pxeLink = pxeAlbum->FirstChildElement("url");
        CScraperUrl scurlAlbum;
        if (!pxeLink)
          scurlAlbum.ParseFromData(scurl.GetData());
        for (; pxeLink && pxeLink->FirstChild(); pxeLink = pxeLink->NextSiblingElement("url"))
          scurlAlbum.ParseAndAppendUrl(pxeLink);

        if (!scurlAlbum.HasUrls())
          continue;

        CMusicAlbumInfo ali(sTitle, sArtist, sAlbumName, scurlAlbum);

        TiXmlElement *pxeRel = pxeAlbum->FirstChildElement("relevance");
        if (pxeRel && pxeRel->FirstChild())
        {
          const char *szScale = pxeRel->Attribute("scale");
          float flScale = szScale ? float(atof(szScale)) : 1;
          ali.SetRelevance(float(atof(pxeRel->FirstChild()->Value())) / flScale);
        }

        vcali.push_back(ali);
      }
    }
  }
  return vcali;
}

// find artist, using fcurl for web fetches
// returns a list of artists (empty if no match or failure)
std::vector<CMusicArtistInfo> CScraper::FindArtist(CCurlFile &fcurl, const std::string &sArtist)
{
  CLog::Log(LOGDEBUG,
            "{}: Searching for '{}' using {} scraper "
            "(file: '{}', content: '{}', version: '{}')",
            __FUNCTION__, sArtist, Name(), Path(), ADDON::TranslateContent(Content()),
            Version().asString());

  std::vector<CMusicArtistInfo> vcari;
  if (IsNoop())
    return vcari;

  if (m_isPython)
    return PythonFind<CMusicArtistInfo>(ID(),
      {{"artist", sArtist}, {"pathSettings", GetPathSettingsAsJSON()}});

  // scraper function is given the artist as parameter and
  // returns an XML <url> element parseable by CScraperUrl
  std::vector<std::string> extras(1);
  g_charsetConverter.utf8To(SearchStringEncoding(), sArtist, extras[0]);
  extras[0] = CURL::Encode(extras[0]);
  CScraperUrl scurl;
  std::vector<std::string> vcsOut = RunNoThrow("CreateArtistSearchUrl", scurl, fcurl, &extras);

  if (vcsOut.empty() || vcsOut[0].empty())
    return vcari;
  scurl.ParseFromData(vcsOut[0]);

  // the next function is passed the contents of the returned URL, and returns
  // an empty string on failure; on success, returns XML matches in the form:
  // <results>
  //  <entity>
  //   <title>...</title>
  //   <year>...</year>
  //   <genre>...</genre>
  //   <disambiguation>...</disambiguation>
  //   <url>...</url> (with the usual CScraperUrl decorations like post or spoof)
  //  </entity>
  //  ...
  // </results>
  vcsOut = RunNoThrow("GetArtistSearchResults", scurl, fcurl);

  // parse the returned XML into a vector of artist objects
  for (std::vector<std::string>::const_iterator i = vcsOut.begin(); i != vcsOut.end(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(*i, TIXML_ENCODING_UTF8);
    if (!doc.RootElement())
    {
      CLog::Log(LOGERROR, "{}: Unable to parse XML", __FUNCTION__);
      return vcari;
    }
    TiXmlHandle xhDoc(&doc);
    for (TiXmlElement *pxeArtist = xhDoc.FirstChild("results").FirstChild("entity").Element();
         pxeArtist; pxeArtist = pxeArtist->NextSiblingElement())
    {
      TiXmlNode *pxnTitle = pxeArtist->FirstChild("title");
      if (pxnTitle && pxnTitle->FirstChild())
      {
        CScraperUrl scurlArtist;

        TiXmlElement *pxeLink = pxeArtist->FirstChildElement("url");
        if (!pxeLink)
          scurlArtist.ParseFromData(scurl.GetData());
        for (; pxeLink && pxeLink->FirstChild(); pxeLink = pxeLink->NextSiblingElement("url"))
          scurlArtist.ParseAndAppendUrl(pxeLink);

        if (!scurlArtist.HasUrls())
          continue;

        CMusicArtistInfo ari(pxnTitle->FirstChild()->Value(), scurlArtist);
        std::string genre;
        XMLUtils::GetString(pxeArtist, "genre", genre);
        if (!genre.empty())
          ari.GetArtist().genre =
              StringUtils::Split(genre, CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_musicItemSeparator);
        XMLUtils::GetString(pxeArtist, "disambiguation", ari.GetArtist().strDisambiguation);
        XMLUtils::GetString(pxeArtist, "year", ari.GetArtist().strBorn);

        vcari.push_back(ari);
      }
    }
  }
  return vcari;
}

// fetch list of episodes from URL (from video database)
EPISODELIST CScraper::GetEpisodeList(XFILE::CCurlFile &fcurl, const CScraperUrl &scurl)
{
  EPISODELIST vcep;
  if (!scurl.HasUrls())
    return vcep;

  CLog::Log(LOGDEBUG,
            "{}: Searching '{}' using {} scraper "
            "(file: '{}', content: '{}', version: '{}')",
            __FUNCTION__, scurl.GetFirstThumbUrl(), Name(), Path(),
            ADDON::TranslateContent(Content()), Version().asString());

  if (m_isPython)
  {
    std::stringstream str;
    str << "plugin://" << ID()
        << "?action=getepisodelist&url=" << CURL::Encode(scurl.GetFirstThumbUrl())
        << "&pathSettings=" << CURL::Encode(GetPathSettingsAsJSON());

    CFileItemList items;
    if (!XFILE::CDirectory::GetDirectory(str.str(), items, "", DIR_FLAG_DEFAULTS))
      return vcep;

    for (int i = 0; i < items.Size(); ++i)
    {
      EPISODE ep;
      const auto& tag = *items[i]->GetVideoInfoTag();
      ep.strTitle = tag.m_strTitle;
      ep.iSeason = tag.m_iSeason;
      ep.iEpisode = tag.m_iEpisode;
      ep.cDate = tag.m_firstAired;
      ep.iSubepisode = items[i]->GetProperty("video.sub_episode").asInteger();
      CScraperUrl::SUrlEntry surl;
      surl.m_type = CScraperUrl::UrlType::General;
      surl.m_url = items[i]->GetURL().Get();
      ep.cScraperUrl.AppendUrl(surl);
      vcep.push_back(ep);
    }

    return vcep;
  }

  std::vector<std::string> vcsIn;
  vcsIn.push_back(scurl.GetFirstThumbUrl());
  std::vector<std::string> vcsOut = RunNoThrow("GetEpisodeList", scurl, fcurl, &vcsIn);

  // parse the XML response
  for (std::vector<std::string>::const_iterator i = vcsOut.begin(); i != vcsOut.end(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(*i);
    if (!doc.RootElement())
    {
      CLog::Log(LOGERROR, "{}: Unable to parse XML", __FUNCTION__);
      continue;
    }

    TiXmlHandle xhDoc(&doc);
    for (TiXmlElement *pxeMovie = xhDoc.FirstChild("episodeguide").FirstChild("episode").Element();
         pxeMovie; pxeMovie = pxeMovie->NextSiblingElement())
    {
      EPISODE ep;
      TiXmlElement *pxeLink = pxeMovie->FirstChildElement("url");
      std::string strEpNum;
      if (pxeLink && XMLUtils::GetInt(pxeMovie, "season", ep.iSeason) &&
          XMLUtils::GetString(pxeMovie, "epnum", strEpNum) && !strEpNum.empty())
      {
        CScraperUrl &scurlEp(ep.cScraperUrl);
        size_t dot = strEpNum.find('.');
        ep.iEpisode = atoi(strEpNum.c_str());
        ep.iSubepisode = (dot != std::string::npos) ? atoi(strEpNum.substr(dot + 1).c_str()) : 0;
        std::string title;
        if (!XMLUtils::GetString(pxeMovie, "title", title) || title.empty())
          title = g_localizeStrings.Get(10005); // Not available
        scurlEp.SetTitle(title);
        std::string id;
        if (XMLUtils::GetString(pxeMovie, "id", id))
          scurlEp.SetId(id);

        for (; pxeLink && pxeLink->FirstChild(); pxeLink = pxeLink->NextSiblingElement("url"))
          scurlEp.ParseAndAppendUrl(pxeLink);

        // date must be the format of yyyy-mm-dd
        ep.cDate.SetValid(false);
        std::string sDate;
        if (XMLUtils::GetString(pxeMovie, "aired", sDate) && sDate.length() == 10)
        {
          tm tm;
          if (strptime(sDate.c_str(), "%Y-%m-%d", &tm))
            ep.cDate.SetDate(1900 + tm.tm_year, tm.tm_mon + 1, tm.tm_mday);
        }
        vcep.push_back(ep);
      }
    }
  }

  return vcep;
}

// takes URL; returns true and populates video details on success, false otherwise
bool CScraper::GetVideoDetails(XFILE::CCurlFile& fcurl,
                               const std::unordered_map<std::string, std::string>& uniqueIDs,
                               const CScraperUrl& scurl,
                               bool fMovie /*else episode*/,
                               CVideoInfoTag& video)
{
  CLog::Log(LOGDEBUG,
            "{}: Reading {} '{}' using {} scraper "
            "(file: '{}', content: '{}', version: '{}')",
            __FUNCTION__, fMovie ? MediaTypeMovie : MediaTypeEpisode, scurl.GetFirstThumbUrl(),
            Name(), Path(), ADDON::TranslateContent(Content()), Version().asString());

  video.Reset();

  if (m_isPython)
    return PythonDetails(ID(), "url", scurl.GetFirstThumbUrl(),
                         fMovie ? "getdetails" : "getepisodedetails", GetPathSettingsAsJSON(),
                         uniqueIDs, video);

  std::string sFunc = fMovie ? "GetDetails" : "GetEpisodeDetails";
  std::vector<std::string> vcsIn;
  vcsIn.push_back(scurl.GetId());
  vcsIn.push_back(scurl.GetFirstThumbUrl());
  std::vector<std::string> vcsOut = RunNoThrow(sFunc, scurl, fcurl, &vcsIn);

  // parse XML output
  bool fRet(false);
  for (std::vector<std::string>::const_iterator i = vcsOut.begin(); i != vcsOut.end(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(*i, TIXML_ENCODING_UTF8);
    if (!doc.RootElement())
    {
      CLog::Log(LOGERROR, "{}: Unable to parse XML", __FUNCTION__);
      continue;
    }

    TiXmlHandle xhDoc(&doc);
    TiXmlElement *pxeDetails = xhDoc.FirstChild("details").Element();
    if (!pxeDetails)
    {
      CLog::Log(LOGERROR, "{}: Invalid XML file (want <details>)", __FUNCTION__);
      continue;
    }
    video.Load(pxeDetails, true /*fChain*/);
    fRet = true; // but don't exit in case of chaining
  }
  return fRet;
}

// takes a URL; returns true and populates album on success, false otherwise
bool CScraper::GetAlbumDetails(CCurlFile &fcurl, const CScraperUrl &scurl, CAlbum &album)
{
  CLog::Log(LOGDEBUG,
            "{}: Reading '{}' using {} scraper "
            "(file: '{}', content: '{}', version: '{}')",
            __FUNCTION__, scurl.GetFirstThumbUrl(), Name(), Path(),
            ADDON::TranslateContent(Content()), Version().asString());

  if (m_isPython)
    return PythonDetails(ID(), "url", scurl.GetFirstThumbUrl(),
      "getdetails", GetPathSettingsAsJSON(), album);

  std::vector<std::string> vcsOut = RunNoThrow("GetAlbumDetails", scurl, fcurl);

  // parse the returned XML into an album object (see CAlbum::Load for details)
  bool fRet(false);
  for (std::vector<std::string>::const_iterator i = vcsOut.begin(); i != vcsOut.end(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(*i, TIXML_ENCODING_UTF8);
    if (!doc.RootElement())
    {
      CLog::Log(LOGERROR, "{}: Unable to parse XML", __FUNCTION__);
      return false;
    }
    fRet = album.Load(doc.RootElement(), i != vcsOut.begin());
  }
  return fRet;
}

// takes a URL (one returned from FindArtist), the original search string, and
// returns true and populates artist on success, false on failure
bool CScraper::GetArtistDetails(CCurlFile &fcurl,
                                const CScraperUrl &scurl,
                                const std::string &sSearch,
                                CArtist &artist)
{
  if (!scurl.HasUrls())
    return false;

  CLog::Log(LOGDEBUG,
            "{}: Reading '{}' ('{}') using {} scraper "
            "(file: '{}', content: '{}', version: '{}')",
            __FUNCTION__, scurl.GetFirstThumbUrl(), sSearch, Name(), Path(),
            ADDON::TranslateContent(Content()), Version().asString());

  if (m_isPython)
    return PythonDetails(ID(), "url", scurl.GetFirstThumbUrl(),
      "getdetails", GetPathSettingsAsJSON(), artist);

  // pass in the original search string for chaining to search other sites
  std::vector<std::string> vcIn;
  vcIn.push_back(sSearch);
  vcIn[0] = CURL::Encode(vcIn[0]);

  std::vector<std::string> vcsOut = RunNoThrow("GetArtistDetails", scurl, fcurl, &vcIn);

  // ok, now parse the xml file
  bool fRet(false);
  for (std::vector<std::string>::const_iterator i = vcsOut.begin(); i != vcsOut.end(); ++i)
  {
    CXBMCTinyXML doc;
    doc.Parse(*i, TIXML_ENCODING_UTF8);
    if (!doc.RootElement())
    {
      CLog::Log(LOGERROR, "{}: Unable to parse XML", __FUNCTION__);
      return false;
    }

    fRet = artist.Load(doc.RootElement(), i != vcsOut.begin());
  }
  return fRet;
}

bool CScraper::GetArtwork(XFILE::CCurlFile &fcurl, CVideoInfoTag &details)
{
  if (!details.HasUniqueID())
    return false;

  CLog::Log(LOGDEBUG,
            "{}: Reading artwork for '{}' using {} scraper "
            "(file: '{}', content: '{}', version: '{}')",
            __FUNCTION__, details.GetUniqueID(), Name(), Path(), ADDON::TranslateContent(Content()),
            Version().asString());

  if (m_isPython)
    return PythonDetails(ID(), "id", details.GetUniqueID(),
      "getartwork", GetPathSettingsAsJSON(), details);

  std::vector<std::string> vcsIn;
  CScraperUrl scurl;
  vcsIn.push_back(details.GetUniqueID());
  std::vector<std::string> vcsOut = RunNoThrow("GetArt", scurl, fcurl, &vcsIn);

  bool fRet(false);
  for (std::vector<std::string>::const_iterator it = vcsOut.begin(); it != vcsOut.end(); ++it)
  {
    CXBMCTinyXML doc;
    doc.Parse(*it, TIXML_ENCODING_UTF8);
    if (!doc.RootElement())
    {
      CLog::Log(LOGERROR, "{}: Unable to parse XML", __FUNCTION__);
      return false;
    }
    fRet = details.Load(doc.RootElement(), it != vcsOut.begin());
  }
  return fRet;
}
}
