// Admin manage routes for screens and commands.

const { buildAuditChanges } = require('#src/data/audit-log');

module.exports = function registerManageRoutes(app, deps) {
  const pool = deps.pool;
  const common = deps.common;
  const pages = deps.pages;
  const getAuditUserId = deps.getAuditUserId;
  const recordRequestAuditEvent = deps.recordRequestAuditEvent;
  const redirectAfterSave = deps.redirectAfterSave;
  const notifyPlayerScreens = deps.notifyPlayerScreens;
  const broadcastDashboardState = deps.broadcastDashboardState;
  const getScreenDeleteBlockMessage = deps.getScreenDeleteBlockMessage;
  const getScreenConnections = deps.getScreenConnections;
  const forwardPlayerCommand = deps.forwardPlayerCommand;
  const forwardPlayerCommandToBaseUrl = deps.forwardPlayerCommandToBaseUrl;
  const requirePermission = deps.requirePermission;

  const SCREEN_NAME_MAX_LENGTH = 255;
  const SCREEN_SLUG_MAX_LENGTH = 255;

  function readLimitedText(value, maxLength) {
    const text = String(value || '').trim();
    const limit = Number(maxLength);
    if (!Number.isFinite(limit) || limit < 1 || text.length <= limit) {
      return text;
    }
    return text.slice(0, limit);
  }

  function normalizeExplicitPlayerBaseUrl(value) {
    return String(value || '').trim().replace(/\/$/, '');
  }

  async function fetchPlayerRegistrations() {
    if (typeof common.fetchPlayerRegistrations !== 'function') {
      return [];
    }

    try {
      const registrations = await common.fetchPlayerRegistrations(pool);
      return Array.isArray(registrations) ? registrations : [];
    } catch (_error) {
      return [];
    }
  }

  function isRecentPlayerRegistration(player, staleSeconds) {
    const lastSeenAt = player && player.last_seen_at;
    const lastSeenAtValue = lastSeenAt instanceof Date ? lastSeenAt.getTime() : new Date(lastSeenAt).getTime();
    const cutoffTime = Date.now() - Math.max(30, Number(staleSeconds || 60)) * 1000;

    return Number.isFinite(lastSeenAtValue) && lastSeenAtValue >= cutoffTime;
  }

  async function fetchLiveConnectionsForScreen(slug) {
    if (typeof getScreenConnections !== 'function') {
      return [];
    }

    try {
      const response = await getScreenConnections(slug);
      return Array.isArray(response && response.connections) ? response.connections : [];
    } catch (_error) {
      return [];
    }
  }

  async function resolvePlayerBaseUrlsForConnections(connections) {
    const connectionList = Array.isArray(connections) ? connections : [];
    const seen = new Set();
    const registrations = await fetchPlayerRegistrations();

    return connectionList.map(function (connection) {
      const selectedPublicBaseUrl = normalizeExplicitPlayerBaseUrl(connection && connection.playerPublicBaseUrl);
      if (!selectedPublicBaseUrl || seen.has(selectedPublicBaseUrl)) {
        return '';
      }

      seen.add(selectedPublicBaseUrl);
      const matchedPlayer = registrations.find(function (player) {
        return normalizeExplicitPlayerBaseUrl(player && player.public_base_url) === selectedPublicBaseUrl;
      }) || null;

      return normalizeExplicitPlayerBaseUrl(matchedPlayer && matchedPlayer.internal_base_url) || selectedPublicBaseUrl;
    }).filter(Boolean);
  }

  async function forwardPlayerCommandForConnections(slug, connections, commandPayload) {
    const targetBaseUrls = await resolvePlayerBaseUrlsForConnections(connections);
    if (targetBaseUrls.length && typeof forwardPlayerCommandToBaseUrl === 'function') {
      const results = await Promise.allSettled(targetBaseUrls.map(function (targetBaseUrl) {
        return forwardPlayerCommandToBaseUrl(targetBaseUrl, slug, commandPayload);
      }));

      return {
        ok: true,
        sent: results.filter(function (result) {
          return result.status === 'fulfilled';
        }).length,
        results: results
      };
    }

    return forwardPlayerCommand(slug, commandPayload);
  }

  async function fetchAllScreenTargets() {
    const [rows] = await pool.query(
      `SELECT s.slug
       FROM d_screens s
       WHERE s.slug IS NOT NULL
       ORDER BY s.slug ASC`
    );
    return (rows || [])
      .map(function (row) {
        return {
          slug: String(row && row.slug ? row.slug : '').trim(),
          playerId: '',
          publicBaseUrl: '',
          internalBaseUrl: ''
        };
      })
      .filter(function (row) {
        return Boolean(row.slug);
      });
  }

  app.post('/commands', requirePermission('dashboard.allow'), async function (req, res, next) {
    try {
      const command = String((req.body && req.body.command) || req.query.command || '').trim().toLowerCase();
      const blackoutValue = req.body && Object.prototype.hasOwnProperty.call(req.body, 'blackout')
        ? req.body.blackout
        : req.query.blackout;
      const pausedValue = req.body && Object.prototype.hasOwnProperty.call(req.body, 'paused')
        ? req.body.paused
        : req.query.paused;

      if (!command) {
        return res.status(400).json({ error: 'Command is required' });
      }

      if (command !== 'reload' && command !== 'blackout' && command !== 'pause') {
        return res.status(400).json({ error: 'Unsupported command' });
      }

      const targets = await fetchAllScreenTargets();
      if (!targets.length) {
        await broadcastDashboardState();
        return res.json({ ok: true, command: command, sent: 0 });
      }

      const payload = command === 'blackout'
        ? {
            command: 'blackout',
            blackout: blackoutValue === true || blackoutValue === 'true' || blackoutValue === '1' ? true : false
          }
        : command === 'pause'
          ? {
              command: 'pause',
              paused: pausedValue === true || pausedValue === 'true' || pausedValue === '1' ? true : false
            }
          : 'reload';

      const results = await Promise.allSettled(targets.map(async function (target) {
        const liveConnections = await fetchLiveConnectionsForScreen(target.slug);
        if (liveConnections.length) {
          return forwardPlayerCommandForConnections(target.slug, liveConnections, payload);
        }

        return forwardPlayerCommand(target.slug, payload);
      }));
      const sentCount = results.reduce(function (total, result) {
        if (result.status !== 'fulfilled') {
          return total;
        }

        const sentValue = Number(result.value && typeof result.value.sent === 'number' ? result.value.sent : 1);
        return total + (Number.isFinite(sentValue) && sentValue > 0 ? sentValue : 1);
      }, 0);
      await broadcastDashboardState();

      return res.json({
        ok: true,
        command: command,
        sent: sentCount,
        blackout: command === 'blackout' ? Boolean(payload.blackout) : undefined,
        paused: command === 'pause' ? Boolean(payload.paused) : undefined
      });
    } catch (error) {
      next(error);
    }
  });

  app.get('/screens/new', requirePermission('screens.create'), async function (req, res, next) {
    try {
      const data = await common.fetchScreenEditData(pool);
      res.send(pages.renderScreenFormPage(data, req.query.message ? String(req.query.message) : '', req.currentUser));
    } catch (error) {
      next(error);
    }
  });

  app.post('/screens', requirePermission('screens.create'), async function (req, res, next) {
    try {
      const name = typeof common.validateMaxLength === 'function'
        ? common.validateMaxLength(req.body.name || '', SCREEN_NAME_MAX_LENGTH, 'Screen name')
        : readLimitedText(req.body.name || '', 255);
      if (!name) {
        return res.status(400).send('Screen name is required.');
      }
      if (await common.fetchDuplicateName(pool, 'd_screens', name)) {
        return res.status(400).send('A screen with that name already exists.');
      }
      const slugInput = typeof common.validateMaxLength === 'function'
        ? common.validateMaxLength(req.body.slug || '', SCREEN_SLUG_MAX_LENGTH, 'Screen URL')
        : readLimitedText(req.body.slug || '', 255);
      const playlistId = req.body.playlist_id ? Number(req.body.playlist_id) : null;
      const slug = await common.uniqueScreenSlug(pool, common.slugify(slugInput || name));
      const actorId = getAuditUserId(req);
      const [result] = await pool.query('INSERT INTO d_screens (name, slug, playlist_id, created_by, modified_by) VALUES (?, ?, ?, ?, ?)', [name, slug, playlistId, actorId, actorId]);
      if (typeof recordRequestAuditEvent === 'function') await recordRequestAuditEvent(pool, req, { category: 'screens', eventType: 'screen.created', actorUserId: actorId, targetType: 'screen', targetId: result.insertId, targetLabel: name, details: { slug: slug, playlistId: playlistId } });
      redirectAfterSave(req, res, '/screens?edit=' + result.insertId, {
        closeUrl: '/screens',
        newUrl: '/screens/new',
        message: 'Screen created.'
      });
    } catch (error) {
      next(error);
    }
  });

  app.post('/screens/:id', requirePermission('screens.update'), async function (req, res, next) {
    try {
      const name = typeof common.validateMaxLength === 'function'
        ? common.validateMaxLength(req.body.name || '', SCREEN_NAME_MAX_LENGTH, 'Screen name')
        : readLimitedText(req.body.name || '', 255);
      if (!name) {
        return res.status(400).send('Screen name is required.');
      }
      const screen = await common.fetchScreenById(pool, Number(req.params.id));
      if (!screen) {
        return res.status(404).send('Screen not found');
      }
      if (await common.fetchDuplicateName(pool, 'd_screens', name, screen.id)) {
        return res.status(400).send('A screen with that name already exists.');
      }
      const playlistId = req.body.playlist_id ? Number(req.body.playlist_id) : null;
      const previousPlaylistId = screen.playlist_id;
      const slug = String(screen.slug || '').trim();
      const previousSlug = String(screen.slug || '').trim();
      const changes = buildAuditChanges({
        name: screen.name,
        slug: previousSlug,
        playlistId: previousPlaylistId === null ? null : Number(previousPlaylistId)
      }, {
        name: name,
        slug: slug,
        playlistId: playlistId
      });
      await pool.query('UPDATE d_screens SET name = ?, slug = ?, playlist_id = ?, modified_by = ? WHERE id = ?', [name, slug, playlistId, getAuditUserId(req), screen.id]);
      if (previousPlaylistId !== playlistId && previousSlug) {
        await notifyPlayerScreens([previousSlug], 'refresh');
      }
      if (previousSlug && previousSlug !== slug) {
        const previousConnections = await fetchLiveConnectionsForScreen(previousSlug);
        const redirectPayload = {
          command: 'redirect',
          url: `/screen/${encodeURIComponent(slug)}`
        };
        if (previousConnections.length) {
          await forwardPlayerCommandForConnections(previousSlug, previousConnections, redirectPayload);
        } else {
          await forwardPlayerCommand(previousSlug, redirectPayload);
        }
      }
      if (typeof recordRequestAuditEvent === 'function') await recordRequestAuditEvent(pool, req, { category: 'screens', eventType: 'screen.updated', actorUserId: getAuditUserId(req), targetType: 'screen', targetId: screen.id, targetLabel: name, details: { changes: changes } });
      redirectAfterSave(req, res, '/screens?edit=' + screen.id, {
        closeUrl: '/screens',
        newUrl: '/screens/new',
        message: 'Screen updated.'
      });
    } catch (error) {
      next(error);
    }
  });

  app.post('/screens/:id/delete', requirePermission('screens.delete'), async function (req, res, next) {
    try {
      const screen = await common.fetchScreenById(pool, Number(req.params.id));
      if (!screen) {
        return res.status(404).send('Screen not found');
      }
      const blockMessage = await getScreenDeleteBlockMessage(pool, screen, getScreenConnections);
      if (blockMessage) {
        return res.redirect('/screens?message=' + encodeURIComponent(blockMessage));
      }
      await pool.query('DELETE FROM d_screens WHERE id = ?', [screen.id]);
      if (typeof recordRequestAuditEvent === 'function') await recordRequestAuditEvent(pool, req, { category: 'screens', eventType: 'screen.deleted', actorUserId: getAuditUserId(req), targetType: 'screen', targetId: screen.id, targetLabel: screen.name });
      res.redirect('/screens?message=' + encodeURIComponent('Screen deleted.'));
    } catch (error) {
      next(error);
    }
  });
};