// Playlist admin routes and playlist-slide management.

module.exports = function registerPlaylistRoutes(app, deps) {
  const pool = deps.pool;
  const common = deps.common;
  const pages = deps.pages;
  const fetchOrderedPlaylistSlides = deps.fetchOrderedPlaylistSlides;
  const fetchScreensByPlaylistId = deps.fetchScreensByPlaylistId;
  const fetchPlaylistCanvasId = deps.fetchPlaylistCanvasId;
  const readArrayField = deps.readArrayField;
  const getAuditUserId = deps.getAuditUserId;
  const redirectAfterSave = deps.redirectAfterSave;
  const notifyPlayerScreens = deps.notifyPlayerScreens;
  const broadcastDashboardState = deps.broadcastDashboardState;
  const getPlaylistDeleteBlockMessage = deps.getPlaylistDeleteBlockMessage;
  const requirePermission = deps.requirePermission;

  function readRawFieldArray(reqBody, keys) {
    const searchKeys = Array.isArray(keys) ? keys : [keys];
    for (let index = 0; index < searchKeys.length; index += 1) {
      const key = searchKeys[index];
      if (!reqBody || !Object.prototype.hasOwnProperty.call(reqBody, key)) {
        continue;
      }
      const value = reqBody[key];
      if (Array.isArray(value)) {
        return value.map(function (item) {
          return item === undefined || item === null ? '' : String(item);
        });
      }
      return [value === undefined || value === null ? '' : String(value)];
    }
    return [];
  }

  function normalizeScheduleRuleValuesFromBody(reqBody, index) {
    const startDatetimeValues = readRawFieldArray(reqBody, ['schedule_rule_start_datetime[]', 'schedule_rule_start_datetime']);
    const endDatetimeValues = readRawFieldArray(reqBody, ['schedule_rule_end_datetime[]', 'schedule_rule_end_datetime']);
    const startTimeValues = readRawFieldArray(reqBody, ['schedule_rule_start_time[]', 'schedule_rule_start_time']);
    const endTimeValues = readRawFieldArray(reqBody, ['schedule_rule_end_time[]', 'schedule_rule_end_time']);
    const daysCsvValues = readRawFieldArray(reqBody, ['schedule_rule_days_csv[]', 'schedule_rule_days_csv']);

    const startDatetime = String(startDatetimeValues[index] || '').trim() || null;
    const endDatetime = String(endDatetimeValues[index] || '').trim() || null;
    const startTime = String(startTimeValues[index] || '').trim() || null;
    const endTime = String(endTimeValues[index] || '').trim() || null;
    const daysCsv = String(daysCsvValues[index] || '').trim();
    const days = daysCsv
      ? Array.from(new Set(daysCsv.split(',').map(function (value) { return Number(value); }).filter(function (day) {
          return Number.isInteger(day) && day >= 0 && day <= 6;
        }))).sort(function (left, right) { return left - right; })
      : [];

    return {
      start_datetime: startDatetime,
      end_datetime: endDatetime,
      start_time: startTime,
      end_time: endTime,
      schedule_days_json: days.length ? JSON.stringify(days) : null
    };
  }

  function buildScheduleRulesFromRequestBody(reqBody) {
    const rowKeys = readRawFieldArray(reqBody, ['schedule_rule_row_key[]', 'schedule_rule_row_key']);
    const positions = readRawFieldArray(reqBody, ['schedule_rule_position[]', 'schedule_rule_position']);
    const startDatetimeValues = readRawFieldArray(reqBody, ['schedule_rule_start_datetime[]', 'schedule_rule_start_datetime']);
    const endDatetimeValues = readRawFieldArray(reqBody, ['schedule_rule_end_datetime[]', 'schedule_rule_end_datetime']);
    const startTimeValues = readRawFieldArray(reqBody, ['schedule_rule_start_time[]', 'schedule_rule_start_time']);
    const endTimeValues = readRawFieldArray(reqBody, ['schedule_rule_end_time[]', 'schedule_rule_end_time']);
    const daysCsvValues = readRawFieldArray(reqBody, ['schedule_rule_days_csv[]', 'schedule_rule_days_csv']);

    const lengths = [rowKeys.length, positions.length, startDatetimeValues.length, endDatetimeValues.length, startTimeValues.length, endTimeValues.length, daysCsvValues.length]
      .filter(function (value) { return value > 0; });
    if (lengths.length && lengths.some(function (length) { return length !== lengths[0]; })) {
      return null;
    }

    return rowKeys.map(function (rowKey, index) {
      const rule = normalizeScheduleRuleValuesFromBody(reqBody, index);
      if (!rule.start_datetime && !rule.end_datetime && !rule.start_time && !rule.end_time && !rule.schedule_days_json) {
        return null;
      }
      return {
        rowKey: String(rowKey || '').trim(),
        position: Number(positions[index] || index) || 0,
        startDatetime: rule.start_datetime,
        endDatetime: rule.end_datetime,
        startTime: rule.start_time,
        endTime: rule.end_time,
        daysJson: rule.schedule_days_json
      };
    }).filter(Boolean);
  }

  async function replacePlaylistSlideScheduleRules(connection, playlistSlideId, scheduleRules, actorId) {
    await connection.query('DELETE FROM c_playlist_slide_schedule_rules WHERE playlist_slide_id = ?', [playlistSlideId]);
    for (let index = 0; index < scheduleRules.length; index += 1) {
      const rule = scheduleRules[index];
      await connection.query(
        'INSERT INTO c_playlist_slide_schedule_rules (playlist_slide_id, position, start_datetime, end_datetime, start_time, end_time, schedule_days_json, created_by, modified_by) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)',
        [playlistSlideId, rule.position || index, rule.startDatetime, rule.endDatetime, rule.startTime, rule.endTime, rule.daysJson, actorId, actorId]
      );
    }
  }

  function createValidationError(message) {
    const error = new Error(message);
    error.statusCode = 400;
    return error;
  }

  async function savePlaylistItems(connection, playlist, reqBody, actorId, options) {
    const shouldUpdatePlaylist = !options || options.updatePlaylist !== false;
    const name = String(reqBody.name || '').trim();
    const fadeBetweenSlides = reqBody.fade_between_slides ? 1 : 0;
    const skipUnavailableRtmp = reqBody.skip_unavailable_rtmp ? 1 : 0;
    const canvasSizeId = Number(reqBody.canvas_size_id);
    let requestedCanvasId = null;

    if (!name) {
      throw createValidationError('Playlist name is required.');
    }

    if (shouldUpdatePlaylist && reqBody.canvas_size_id !== undefined && reqBody.canvas_size_id !== null && String(reqBody.canvas_size_id).trim() !== '') {
      if (!Number.isInteger(canvasSizeId) || canvasSizeId <= 0) {
        throw createValidationError('Canvas size is invalid.');
      }
      const canvasSize = await common.fetchCanvasSizeById(connection, canvasSizeId);
      if (!canvasSize) {
        throw createValidationError('Canvas size not found.');
      }
      requestedCanvasId = Number(canvasSize.id);
      if (Number.isInteger(Number(playlist.canvas_id)) && Number(playlist.canvas_id) > 0 && Number(playlist.canvas_id) !== requestedCanvasId) {
        throw new Error('Canvas size cannot be changed after the playlist is created.');
      }
    }

    const affectedScreens = await fetchScreensByPlaylistId(connection, playlist.id);

    const slideIds = readArrayField(reqBody, ['slide_id[]', 'slide_id']);
    const rowKeys = readRawFieldArray(reqBody, ['row_key[]', 'row_key']);
    const durations = readArrayField(reqBody, ['duration_seconds[]', 'duration_seconds']);
    const useVideoDurations = readArrayField(reqBody, ['use_video_duration[]', 'use_video_duration']);
    const disableAudios = readArrayField(reqBody, ['disable_audio[]', 'disable_audio']);
    const scheduleRules = buildScheduleRulesFromRequestBody(reqBody);

    if (durations.length && durations.length !== slideIds.length) {
      throw createValidationError('Playlist slide data is invalid.');
    }
    if (useVideoDurations.length && useVideoDurations.length !== slideIds.length) {
      throw createValidationError('Playlist slide data is invalid.');
    }
    if (disableAudios.length && disableAudios.length !== slideIds.length) {
      throw createValidationError('Playlist slide data is invalid.');
    }
    if (rowKeys.length && rowKeys.length !== slideIds.length) {
      throw createValidationError('Playlist slide data is invalid.');
    }

    const scheduleRulesByRowKey = new Map();
    if (scheduleRules === null) {
      throw createValidationError('Playlist schedule data is invalid.');
    }
    scheduleRules.forEach(function (rule) {
      const rowKey = String(rule.rowKey || '').trim();
      if (!scheduleRulesByRowKey.has(rowKey)) {
        scheduleRulesByRowKey.set(rowKey, []);
      }
      scheduleRulesByRowKey.get(rowKey).push(rule);
    });

    const normalizedSlides = [];
    const seenSlideIds = new Set();
    for (let i = 0; i < slideIds.length; i += 1) {
      const slideId = Number(slideIds[i]);
      if (!Number.isInteger(slideId) || slideId <= 0) {
        throw createValidationError('Invalid slide selection.');
      }
      if (seenSlideIds.has(slideId)) {
        throw createValidationError('A slide can only be added to a playlist once.');
      }
      seenSlideIds.add(slideId);

      const durationRaw = Number(durations[i]);
      const durationSeconds = Number.isFinite(durationRaw) ? Math.max(0.001, Math.round(durationRaw * 1000) / 1000) : 10;
      const useVideoDuration = String(useVideoDurations[i] || '') === '1' ? 1 : 0;
      const disableAudio = String(disableAudios[i] || '') !== '0' ? 1 : 0;
      const rowKey = String(rowKeys[i] || '').trim();
      const playlistScheduleRules = scheduleRulesByRowKey.get(rowKey) || [];
      for (const rule of playlistScheduleRules) {
        if (rule.start_datetime && rule.end_datetime && new Date(rule.end_datetime) < new Date(rule.start_datetime)) {
          throw createValidationError('End datetime must be after start datetime.');
        }
        if (rule.start_time && rule.end_time && rule.end_time < rule.start_time) {
          throw createValidationError('End time must be after start time.');
        }
      }

      normalizedSlides.push({
        slideId,
        rowKey,
        position: i,
        durationSeconds,
        useVideoDuration,
        disableAudio,
        scheduleRules: playlistScheduleRules
      });
    }

    let selectedCanvasId = null;
    if (normalizedSlides.length) {
      const [slides] = await connection.query(
        `SELECT sl.id, st.canvas_size_id AS canvas_size_id
         FROM c_slides sl
         LEFT JOIN c_templates st ON st.id = sl.template_id
         WHERE sl.id IN (?)`,
        [normalizedSlides.map(function (item) { return item.slideId; })]
      );
      if (slides.length !== normalizedSlides.length) {
        throw createValidationError('One or more selected slides no longer exist.');
      }
      const signatures = Array.from(new Set(
        slides
          .map(function (slide) { return Number(slide.canvas_size_id); })
          .filter(function (value) { return Number.isInteger(value) && value > 0; })
      ));
      selectedCanvasId = signatures.length === 1 ? signatures[0] : null;
      if (signatures.length > 1) {
        throw createValidationError('All playlist slides must share the same canvas size.');
      }
      if (Number.isInteger(Number(playlist.canvas_id)) && Number(playlist.canvas_id) > 0 && selectedCanvasId && Number(playlist.canvas_id) !== selectedCanvasId) {
        throw createValidationError('All playlist slides must match the playlist canvas size.');
      }
    }

    const nextCanvasId = Number.isInteger(Number(playlist.canvas_id)) && Number(playlist.canvas_id) > 0
      ? Number(playlist.canvas_id)
      : requestedCanvasId || selectedCanvasId || null;

    if (shouldUpdatePlaylist) {
      await connection.query('UPDATE c_playlists SET name = ?, fade_between_slides = ?, skip_unavailable_rtmp = ?, canvas_id = ?, modified_by = ? WHERE id = ?', [name, fadeBetweenSlides, skipUnavailableRtmp, nextCanvasId, actorId, playlist.id]);
    }

    await connection.query('DELETE FROM c_playlist_slides WHERE playlist_id = ?', [playlist.id]);
    for (let i = 0; i < normalizedSlides.length; i += 1) {
      const item = normalizedSlides[i];
      const [insertResult] = await connection.query(
        'INSERT INTO c_playlist_slides (playlist_id, slide_id, position, duration_seconds, use_video_duration, disable_audio, created_by, modified_by) VALUES (?, ?, ?, ?, ?, ?, ?, ?)',
        [playlist.id, item.slideId, item.position, item.durationSeconds, item.useVideoDuration, item.disableAudio, actorId, actorId]
      );
      const insertedPlaylistSlideId = Number(insertResult.insertId);
      const itemRules = Array.isArray(item.scheduleRules) ? item.scheduleRules : [];
      for (let ruleIndex = 0; ruleIndex < itemRules.length; ruleIndex += 1) {
        const rule = itemRules[ruleIndex];
        await connection.query(
          'INSERT INTO c_playlist_slide_schedule_rules (playlist_slide_id, position, start_datetime, end_datetime, start_time, end_time, schedule_days_json, created_by, modified_by) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)',
          [insertedPlaylistSlideId, rule.position || ruleIndex, rule.startDatetime || null, rule.endDatetime || null, rule.startTime || null, rule.endTime || null, rule.daysJson || null, actorId, actorId]
        );
      }
    }

    return {
      affectedScreens: affectedScreens,
      nextCanvasId: nextCanvasId,
      selectedCanvasId: selectedCanvasId
    };
  }

  app.post('/playlists', requirePermission('playlists.create'), async function (req, res, next) {
    const connection = await pool.getConnection();
    try {
      const name = String(req.body.name || '').trim();
      const fadeBetweenSlides = req.body.fade_between_slides ? 1 : 0;
      const skipUnavailableRtmp = req.body.skip_unavailable_rtmp ? 1 : 0;
      const canvasSizeId = Number(req.body.canvas_size_id);
      if (!name) {
        return res.status(400).send('Playlist name is required.');
      }
      if (!Number.isInteger(canvasSizeId) || canvasSizeId <= 0) {
        return res.status(400).send('Canvas size is required.');
      }
      if (await common.fetchDuplicateName(pool, 'c_playlists', name)) {
        return res.status(400).send('A playlist with that name already exists.');
      }
      const canvasSize = await common.fetchCanvasSizeById(pool, canvasSizeId);
      if (!canvasSize) {
        return res.status(400).send('Canvas size not found.');
      }
      const actorId = getAuditUserId(req);
      await connection.beginTransaction();
      const [result] = await connection.query('INSERT INTO c_playlists (name, fade_between_slides, skip_unavailable_rtmp, canvas_id, created_by, modified_by) VALUES (?, ?, ?, ?, ?, ?)', [name, fadeBetweenSlides, skipUnavailableRtmp, canvasSize.id, actorId, actorId]);
      const playlist = {
        id: Number(result.insertId),
        canvas_id: Number(canvasSize.id)
      };
      await savePlaylistItems(connection, playlist, req.body, actorId, { updatePlaylist: false });
      await connection.commit();
      redirectAfterSave(req, res, '/playlists/' + result.insertId + '/edit', {
        closeUrl: '/playlists',
        newUrl: '/playlists/new',
        message: 'Playlist created.'
      });
    } catch (error) {
      try {
        await connection.rollback();
      } catch (_rollbackError) {
        // Ignore rollback failures and surface the original error.
      }
      if (error && error.statusCode === 400) {
        return res.status(400).send(error.message || 'Playlist data is invalid.');
      }
      next(error);
    } finally {
      connection.release();
    }
  });

  app.post('/playlists/:id', requirePermission('playlists.update'), async function (req, res, next) {
    const connection = await pool.getConnection();
    try {
      const name = String(req.body.name || '').trim();
      const fadeBetweenSlides = req.body.fade_between_slides ? 1 : 0;
      const skipUnavailableRtmp = req.body.skip_unavailable_rtmp ? 1 : 0;
      const canvasSizeId = Number(req.body.canvas_size_id);
      const actorId = getAuditUserId(req);
      let requestedCanvasId = null;
      if (!name) {
        return res.status(400).send('Playlist name is required.');
      }
      const playlist = await common.fetchPlaylistById(connection, Number(req.params.id));
      if (!playlist) {
        return res.status(404).send('Playlist not found');
      }
      if (await common.fetchDuplicateName(pool, 'c_playlists', name, playlist.id)) {
        return res.status(400).send('A playlist with that name already exists.');
      }
      if (req.body.canvas_size_id !== undefined && req.body.canvas_size_id !== null && String(req.body.canvas_size_id).trim() !== '') {
        if (!Number.isInteger(canvasSizeId) || canvasSizeId <= 0) {
          return res.status(400).send('Canvas size is invalid.');
        }
        const canvasSize = await common.fetchCanvasSizeById(connection, canvasSizeId);
        if (!canvasSize) {
          return res.status(400).send('Canvas size not found.');
        }
        requestedCanvasId = Number(canvasSize.id);
        if (Number.isInteger(Number(playlist.canvas_id)) && Number(playlist.canvas_id) > 0 && Number(playlist.canvas_id) !== requestedCanvasId) {
          return res.status(400).send('Canvas size cannot be changed after the playlist is created.');
        }
      }

      const saveResult = await savePlaylistItems(connection, playlist, req.body, actorId, { updatePlaylist: true });
      await connection.commit();
      await notifyPlayerScreens(saveResult.affectedScreens, 'refresh');
      await broadcastDashboardState();
      redirectAfterSave(req, res, '/playlists/' + playlist.id + '/edit', {
        closeUrl: '/playlists',
        newUrl: '/playlists/new',
        message: 'Playlist updated.'
      });
    } catch (error) {
      try {
        await connection.rollback();
      } catch (_rollbackError) {
        // Ignore rollback failures and surface the original error.
      }
      if (error && error.statusCode === 400) {
        return res.status(400).send(error.message || 'Playlist data is invalid.');
      }
      next(error);
    } finally {
      connection.release();
    }
  });

  app.post('/playlists/:id/delete', requirePermission('playlists.delete'), 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 blockMessage = await getPlaylistDeleteBlockMessage(pool, playlist);
      if (blockMessage) {
        return res.redirect('/playlists?message=' + encodeURIComponent(blockMessage));
      }
      await pool.query('DELETE FROM c_playlists WHERE id = ?', [playlist.id]);
      res.redirect('/playlists?message=' + encodeURIComponent('Playlist deleted.'));
    } catch (error) {
      next(error);
    }
  });

  app.post('/playlists/:id/slides', 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 slideId = Number(req.body.slide_id);
      if (!slideId) {
        return res.status(400).send('Slide is required.');
      }
      const playlistCanvasId = await fetchPlaylistCanvasId(pool, playlist.id);
      if (playlistCanvasId === 'mismatch') {
        return res.status(400).send('This playlist already contains slides with different canvas sizes.');
      }
      const slide = await common.fetchSlideById(pool, slideId);
      if (!slide) {
        return res.status(404).send('Slide not found');
      }
      const slideCanvasId = Number(slide.canvas_size_id);
      if (playlistCanvasId && slideCanvasId !== playlistCanvasId) {
        return res.status(400).send('The slide canvas size must match the existing playlist items.');
      }
      const durationValue = Number(req.body.duration_seconds || 10);
      const durationSeconds = Number.isFinite(durationValue) ? Math.max(0.001, Math.round(durationValue * 1000) / 1000) : 10;
      const [positionRows] = await pool.query('SELECT COALESCE(MAX(position), -1) AS max_position FROM c_playlist_slides WHERE playlist_id = ?', [playlist.id]);
      const nextPosition = Number(positionRows[0].max_position) + 1;
      const actorId = getAuditUserId(req);
      await pool.query('INSERT INTO c_playlist_slides (playlist_id, slide_id, position, duration_seconds, use_video_duration, disable_audio, created_by, modified_by) VALUES (?, ?, ?, ?, ?, ?, ?, ?)', [playlist.id, slideId, nextPosition, durationSeconds, 0, 1, actorId, actorId]);
      if (!Number.isInteger(Number(playlist.canvas_id)) || Number(playlist.canvas_id) <= 0) {
        await pool.query('UPDATE c_playlists SET canvas_id = ?, modified_by = ? WHERE id = ?', [slideCanvasId, actorId, playlist.id]);
      }
      await notifyPlayerScreens(await fetchScreensByPlaylistId(pool, playlist.id), 'refresh');
      await broadcastDashboardState();
      res.redirect('/playlists?edit=' + playlist.id + '&message=' + encodeURIComponent('Slide added to playlist.'));
    } catch (error) {
      next(error);
    }
  });

  app.post('/playlists/:id/slides/:playlistSlideId', 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 playlistSlideId = Number(req.params.playlistSlideId);
      const durationValue = Number(req.body.duration_seconds || 10);
      const durationSeconds = Number.isFinite(durationValue) ? Math.max(0.001, Math.round(durationValue * 1000) / 1000) : 10;
      const [currentRows] = await pool.query('SELECT disable_audio FROM c_playlist_slides WHERE id = ? AND playlist_id = ?', [playlistSlideId, playlist.id]);
      if (!currentRows.length) {
        return res.status(404).send('Playlist slide not found');
      }
      const disableAudio = req.body.disable_audio === undefined ? (Number(currentRows[0].disable_audio) ? 1 : 0) : (String(req.body.disable_audio || '') === '0' ? 0 : 1);
      const actorId = getAuditUserId(req);
      const [result] = await pool.query(
        'UPDATE c_playlist_slides SET duration_seconds = ?, disable_audio = ?, modified_by = ? WHERE id = ? AND playlist_id = ?',
        [durationSeconds, disableAudio, actorId, playlistSlideId, playlist.id]
      );
      if (!result.affectedRows) {
        return res.status(404).send('Playlist slide not found');
      }
      await notifyPlayerScreens(await fetchScreensByPlaylistId(pool, playlist.id), 'refresh');
      await broadcastDashboardState();
      res.redirect('/playlists?edit=' + playlist.id + '&message=' + encodeURIComponent('Slide config updated.'));
    } catch (error) {
      next(error);
    }
  });

  app.post('/playlists/:id/slides/:playlistSlideId/move', requirePermission('playlists.update'), async function (req, res, next) {
    const connection = await pool.getConnection();
    try {
      const playlist = await common.fetchPlaylistById(connection, Number(req.params.id));
      if (!playlist) {
        return res.status(404).send('Playlist not found');
      }
      const playlistSlideId = Number(req.params.playlistSlideId);
      const direction = String(req.body.direction || '').toLowerCase();
      if (direction !== 'up' && direction !== 'down') {
        return res.status(400).send('Invalid move direction.');
      }

      await connection.beginTransaction();
      const orderedSlides = await fetchOrderedPlaylistSlides(connection, playlist.id);
      const currentIndex = orderedSlides.findIndex(function (item) {
        return Number(item.id) === playlistSlideId;
      });
      if (currentIndex === -1) {
        await connection.rollback();
        return res.status(404).send('Playlist slide not found');
      }

      const swapIndex = direction === 'up' ? currentIndex - 1 : currentIndex + 1;
      if (swapIndex < 0 || swapIndex >= orderedSlides.length) {
        await connection.rollback();
        return res.redirect('/playlists?edit=' + playlist.id + '&message=' + encodeURIComponent('Slide is already at the ' + (direction === 'up' ? 'top' : 'bottom') + '.'));
      }

      const currentSlide = orderedSlides[currentIndex];
      const swapSlide = orderedSlides[swapIndex];
      const actorId = getAuditUserId(req);

      await connection.query('UPDATE c_playlist_slides SET position = ?, modified_by = ? WHERE id = ? AND playlist_id = ?', [swapSlide.position, actorId, currentSlide.id, playlist.id]);
      await connection.query('UPDATE c_playlist_slides SET position = ?, modified_by = ? WHERE id = ? AND playlist_id = ?', [currentSlide.position, actorId, swapSlide.id, playlist.id]);
      await connection.commit();
      await notifyPlayerScreens(await fetchScreensByPlaylistId(connection, playlist.id), 'refresh');
      await broadcastDashboardState();
      res.redirect('/playlists?edit=' + playlist.id + '&message=' + encodeURIComponent('Slide order updated.'));
    } catch (error) {
      await connection.rollback();
      next(error);
    } finally {
      connection.release();
    }
  });

  app.get('/playlists/new/slides/:playlistSlideId/config', requirePermission('playlists.update'), async function (req, res, next) {
    try {
      const hasQueryScheduleRules = Object.keys(req.query || {}).some(function (key) {
        return String(key || '').indexOf('schedule_rule_') === 0;
      });
      const scheduleRules = hasQueryScheduleRules
        ? (buildScheduleRulesFromRequestBody(req.query) || []).map(function (rule) {
            let days = [];
            try {
              days = rule && rule.daysJson ? JSON.parse(rule.daysJson) : [];
            } catch (_error) {
              days = [];
            }

            return {
              start_datetime: rule.startDatetime,
              end_datetime: rule.endDatetime,
              start_time: rule.startTime,
              end_time: rule.endTime,
              days: Array.isArray(days) ? days : []
            };
          })
        : [];

      return res.send(pages.renderPlaylistSlideConfigPage({ id: null }, {
        id: 0,
        scheduleRules: scheduleRules
      }, req.query.message ? String(req.query.message) : '', req.query.row_key ? String(req.query.row_key) : '', req.currentUser));
    } catch (error) {
      next(error);
    }
  });

  app.get('/playlists/:id/slides/:playlistSlideId/config', requirePermission('playlists.update'), async function (req, res, next) {
    try {
      const playlistId = Number(req.params.id);
      if (!Number.isInteger(playlistId) || playlistId <= 0) {
        return res.status(404).send('Playlist not found');
      }

      const playlist = await common.fetchPlaylistById(pool, playlistId);
      if (!playlist) {
        return res.status(404).send('Playlist not found');
      }
      const data = await common.fetchAdminData(pool);
      let playlistSlide = (data.playlistSlides || []).find(function (item) {
        return item.id === Number(req.params.playlistSlideId) && item.playlist_id === playlist.id;
      });
      if (!playlistSlide && Number(req.params.playlistSlideId) !== 0) {
        return res.status(404).send('Playlist slide not found');
      }
      const hasQueryScheduleRules = Object.keys(req.query || {}).some(function (key) {
        return String(key || '').indexOf('schedule_rule_') === 0;
      });
      const scheduleRules = hasQueryScheduleRules
        ? (buildScheduleRulesFromRequestBody(req.query) || []).map(function (rule) {
            let days = [];
            try {
              days = rule && rule.daysJson ? JSON.parse(rule.daysJson) : [];
            } catch (_error) {
              days = [];
            }

            return {
              start_datetime: rule.startDatetime,
              end_datetime: rule.endDatetime,
              start_time: rule.startTime,
              end_time: rule.endTime,
              days: Array.isArray(days) ? days : []
            };
          })
        : (Array.isArray(playlistSlide && playlistSlide.scheduleRules) ? playlistSlide.scheduleRules : []);

      playlistSlide = Object.assign({}, playlistSlide || {}, {
        id: playlistSlide ? playlistSlide.id : 0,
        scheduleRules: scheduleRules
      });
      return res.send(pages.renderPlaylistSlideConfigPage(playlist, playlistSlide, req.query.message ? String(req.query.message) : '', req.query.row_key ? String(req.query.row_key) : '', req.currentUser));
    } catch (error) {
      next(error);
    }
  });

  app.post('/playlists/:id/slides/:playlistSlideId/config', 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 playlistSlideId = Number(req.params.playlistSlideId);
      const actorId = getAuditUserId(req);
      const scheduleRules = buildScheduleRulesFromRequestBody(req.body);
      if (scheduleRules === null) {
        return res.status(400).send('Schedule rules are invalid.');
      }
      for (const rule of scheduleRules) {
        if (rule.start_datetime && rule.end_datetime && new Date(rule.end_datetime) < new Date(rule.start_datetime)) {
          return res.status(400).send('End datetime must be after start datetime.');
        }
        if (rule.start_time && rule.end_time && rule.end_time < rule.start_time) {
          return res.status(400).send('End time must be after start time.');
        }
      }

      const [result] = await pool.query(
        'UPDATE c_playlist_slides SET modified_by = ? WHERE id = ? AND playlist_id = ?',
        [actorId, playlistSlideId, playlist.id]
      );
      if (!result.affectedRows) {
        return res.status(404).send('Playlist slide not found');
      }
      await replacePlaylistSlideScheduleRules(pool, playlistSlideId, scheduleRules, actorId);
      await notifyPlayerScreens(await fetchScreensByPlaylistId(pool, playlist.id), 'refresh');
      await broadcastDashboardState();
      res.redirect('/playlists?edit=' + playlist.id + '&message=' + encodeURIComponent('Slide timings updated.'));
    } catch (error) {
      next(error);
    }
  });

  app.post('/playlists/:id/slides/:playlistSlideId/delete', 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');
      }
      await pool.query('DELETE FROM c_playlist_slides WHERE id = ? AND playlist_id = ?', [Number(req.params.playlistSlideId), playlist.id]);
      await notifyPlayerScreens(await fetchScreensByPlaylistId(pool, playlist.id), 'refresh');
      await broadcastDashboardState();
      res.redirect('/playlists?edit=' + playlist.id + '&message=' + encodeURIComponent('Slide removed.'));
    } catch (error) {
      next(error);
    }
  });
};