// Copyright (c) 2026 Gordon Bolton. MIT License.

// Helper function to extract poster/cover art URL from a movie or series object
function getCoverArt(item) {
  if (!item || !item.images) return null;
  const poster = item.images.find(img => img.coverType === 'poster');
  if (poster) return poster.remoteUrl || poster.url || null;
  // Fallback to fanart if no poster
  const fanart = item.images.find(img => img.coverType === 'fanart');
  return fanart ? (fanart.remoteUrl || fanart.url || null) : null;
}

// Extract import issues from a Sonarr/Radarr queue record
function getImportIssues(queueRecord) {
  if (!queueRecord) return null;
  const state = queueRecord.trackedDownloadState;
  const status = queueRecord.trackedDownloadStatus;
  if (state !== 'importPending' && status !== 'warning' && status !== 'error') return null;
  const messages = [];
  if (queueRecord.statusMessages && queueRecord.statusMessages.length > 0) {
    for (const sm of queueRecord.statusMessages) {
      if (sm.messages && sm.messages.length > 0) {
        messages.push(...sm.messages);
      } else if (sm.title) {
        messages.push(sm.title);
      }
    }
  }
  if (queueRecord.errorMessage) {
    messages.push(queueRecord.errorMessage);
  }
  if (messages.length === 0) return null;
  return messages;
}

// Helper to build Sonarr web UI link for a series
function getSonarrLink(series) {
  if (!series || !series._instanceUrl || !series.titleSlug) return null;
  return `${series._instanceUrl}/series/${series.titleSlug}`;
}

// Helper to build Radarr web UI link for a movie
function getRadarrLink(movie) {
  if (!movie || !movie._instanceUrl || !movie.titleSlug) return null;
  return `${movie._instanceUrl}/movie/${movie.titleSlug}`;
}

// Determine if a download can be blocklisted by the current user
// Admins: always true (they have arrQueueId)
// Non-admins: true if importIssues OR (torrent >1h old AND availability<100%)
function canBlocklist(download, isAdmin) {
  if (isAdmin) return true;
  if (download.importIssues && download.importIssues.length > 0) return true;
  if (download.qbittorrent && download.addedOn && download.availability) {
    const oneHourAgo = Date.now() - 3600000; // 1 hour in ms
    const addedOn = new Date(download.addedOn).getTime();
    const isOldEnough = addedOn < oneHourAgo;
    const availability = parseFloat(download.availability);
    const isLowAvailability = availability < 100;
    return isOldEnough && isLowAvailability;
  }
  return false;
}

// Extract episode info from a Sonarr queue/history record.
// Returns { season, episode, title } or null if data is missing.
function extractEpisode(record) {
  if (!record) return null;
  const ep = record.episode || {};
  const s = ep.seasonNumber != null ? ep.seasonNumber : record.seasonNumber;
  const e = ep.episodeNumber != null ? ep.episodeNumber : record.episodeNumber;
  if (s == null || e == null) return null;
  const title = ep.title || null;
  return { season: s, episode: e, title };
}

// Find all episodes associated with a download by matching all queue/history records
// that share the same title string.  Returns sorted array of { season, episode, title }.
function gatherEpisodes(titleLower, sonarrRecords) {
  const episodes = [];
  const seen = new Set();
  for (const r of sonarrRecords) {
    const rTitle = (r.title || r.sourceTitle || '').toLowerCase();
    if (rTitle && (rTitle.includes(titleLower) || titleLower.includes(rTitle))) {
      const ep = extractEpisode(r);
      if (ep) {
        const key = `${ep.season}x${ep.episode}`;
        if (!seen.has(key)) {
          seen.add(key);
          episodes.push(ep);
        }
      }
    }
  }
  episodes.sort((a, b) => a.season - b.season || a.episode - b.episode);
  return episodes;
}

module.exports = {
  getCoverArt,
  getImportIssues,
  getSonarrLink,
  getRadarrLink,
  canBlocklist,
  extractEpisode,
  gatherEpisodes
};