const express = require('express');
const router = express.Router();
const authorization = require('../../../middleware/authorization');

const errors = require('../../../errors');
const AssetsService = require('../../../services/assets');

const AssetModel = require('../../../models/asset');

const FilterOpenAssets = (query, filter) => {
  switch(filter) {
  case 'open':
    return query.merge({
      $or: [
        {
          closedAt: null
        },
        {
          closedAt: {
            $gt: Date.now()
          }
        }
      ]
    });
  case 'closed':
    return query.merge({
      closedAt: {
        $lt: Date.now()
      }
    });
  default:
    return query;
  }
};

// List assets.
router.get('/', authorization.needed('ADMIN', 'MODERATOR'), async (req, res, next) => {

  const {
    value = '',
    field = 'created_at',
    page = 1,
    asc = 'false',
    filter = 'all',
    limit = 20,
  } = req.query;

  try {

    const queryOpts = {
      sort: {[field]: (asc === 'true') ? 1 : -1},
      skip: (page - 1) * limit,
      limit
    };

    // Find all the assets.
    let [result, count] = await Promise.all([

      // Find the actuall assets.
      FilterOpenAssets(AssetsService.search({value}), filter)
        .sort(queryOpts.sort)
        .skip(parseInt(queryOpts.skip))
        .limit(parseInt(queryOpts.limit))
        .lean(),

      // Get the count of actual assets.
      FilterOpenAssets(AssetsService.search({value}), filter)
        .count()
    ]);

    // Send back the asset data.
    res.json({
      result,
      limit: Number(limit),
      count,
      page: Number(page),
      totalPages: Math.ceil(count / (limit === 0 ? 1 : limit))
    });
  } catch (e) {
    return next(e);
  }

});

// Get an asset by id.
router.get('/:asset_id', authorization.needed('ADMIN', 'MODERATOR'), async (req, res, next) => {
  try {

    // Send back the asset.
    let asset = await AssetsService.findById(req.params.asset_id);
    if (!asset) {
      return next(errors.ErrNotFound);
    }

    return res.json(asset);
  } catch (e) {
    return next(e);
  }
});

router.put('/:asset_id/settings', authorization.needed('ADMIN'), async (req, res, next) => {
  try {
    await AssetsService.overrideSettings(req.params.asset_id, req.body);
    res.status(204).end();
  } catch (e) {
    return next(e);
  }
});

router.put('/:asset_id/status', authorization.needed('ADMIN'), async (req, res, next) => {
  const {
    closedAt,
    closedMessage
  } = req.body;

  try {
    await AssetModel.update({
      id: req.params.asset_id
    }, {
      $set: {
        closedAt,
        closedMessage
      }
    });

    res.status(204).json();
  } catch (e) {
    return next(e);
  }
});

module.exports = router;