// Playlist route registration and pagination wiring.

module.exports = function registerPlaylistsRoutes(app, deps) {
  const pool = deps.pool;
  const common = deps.common;
  const pages = deps.pages;
  const fetchScreensByPlaylistId = deps.fetchScreensByPlaylistId;
  const { buildPagination } = require('../../../lib/pagination');
  const requirePermission = deps.requirePermission;
  const { buildDuplicatePlaylistName, buildDuplicatePlaylist } = require('./duplicate');

  const LIST_PAGE_SIZE = 25;

  function requireQueryPermission(readPermissionKey, editPermissionKey) {
    return function (req, res, next) {
      const permissionKey = req.query && req.query.edit ? editPermissionKey : readPermissionKey;
      return requirePermission(permissionKey)(req, res, next);
    };
  }

  app.get('/playlists', requireQueryPermission('playlists.read', 'playlists.update'), async function (req, res, next) {
    try {
      const page = Math.max(1, Math.floor(Number(req.query.page) || 1));
      const search = common.getSearchQuery(req);
      const sort = common.getSortQuery(req);
      const direction = common.getSortDirectionQuery(req);
      if (req.query.edit) {
        const data = await common.fetchAdminData(pool);
        const playlist = await common.fetchPlaylistById(pool, Number(req.query.edit));
        if (!playlist) {
          return res.status(404).send('Playlist not found');
        }
        playlist.inUse = (await fetchScreensByPlaylistId(pool, playlist.id)).length > 0;
        return res.send(pages.renderPlaylistEditPage(playlist, data, req.query.message ? String(req.query.message) : '', req.currentUser));
      }
      const data = await common.fetchPlaylistsPage(pool, page, LIST_PAGE_SIZE, search, sort, direction);
      res.send(pages.renderPlaylistsPage({
        playlists: data.playlists || [],
        pagination: buildPagination(data.totalItems, data.currentPage, 'page', { search: search, sort: sort, direction: direction }, LIST_PAGE_SIZE, 'playlists', 'Playlist pages')
      }, req.query.message ? String(req.query.message) : '', req.currentUser));
    } catch (error) {
      next(error);
    }
  });

  app.get('/playlists/new', requirePermission('playlists.create'), function (req, res) {
    (async function () {
      const data = await common.fetchAdminData(pool);
      res.send(await pages.renderPlaylistFormPage(req.query.message ? String(req.query.message) : '', req.currentUser, data, pool));
    })().catch(function (error) {
      res.status(500).send(error.message || 'Unable to load page.');
    });
  });

  app.get('/playlists/:id/duplicate', requirePermission('playlists.read'), requirePermission('playlists.create'), async function (req, res, next) {
    try {
      const playlist = await common.fetchPlaylistById(pool, Number(req.params.id));
      if (!playlist) {
        return res.status(404).send('Playlist not found');
      }

      const data = await common.fetchAdminData(pool);
      let duplicateName = buildDuplicatePlaylistName(playlist.name);
      let duplicateIndex = 2;
      while (await common.fetchDuplicateName(pool, 'c_playlists', duplicateName)) {
        duplicateName = buildDuplicatePlaylistName(playlist.name) + ' (' + duplicateIndex + ')';
        duplicateIndex += 1;
      }

      const duplicatePlaylist = buildDuplicatePlaylist(playlist, duplicateName);
      res.send(await pages.renderPlaylistFormPage(duplicatePlaylist, req.query.message ? String(req.query.message) : 'Review the copied values and save when ready.', req.currentUser, data, pool));
    } catch (error) {
      next(error);
    }
  });

  app.get('/playlists/:id/edit', requirePermission('playlists.update'), async function (req, res, next) {
    try {
      const playlist = await common.fetchPlaylistById(pool, Number(req.params.id));
      if (!playlist) {
        return res.status(404).send('Playlist not found');
      }
      const data = await common.fetchAdminData(pool);
      playlist.inUse = (await fetchScreensByPlaylistId(pool, playlist.id)).length > 0;
      res.send(pages.renderPlaylistEditPage(playlist, data, req.query.message ? String(req.query.message) : '', req.currentUser));
    } catch (error) {
      next(error);
    }
  });
};