import express from 'express';
import globals from '../globals';
import RootValidate from './validate/root';
import res400 from './validate/res400';
import ChangelogModel from '../models/changelog';
import mongoose from 'mongoose';
import _ from 'lodash';

const router = express.Router();

router.get('/', (req, res) => {
  res.json({status: 'API server up and running!'});
});

router.get('/authorized', (req, res) => {
  if (!req.auth(res, globals.levels)) return;
  res.json({
    status: 'Authorization successful',
    method: req.authDetails.method,
    level: req.authDetails.level,
    user_id: req.authDetails.id
  });
});

// TODO: evaluate exact changelog functionality (restoring, deleting after time, etc.)
router.get('/changelog/:timestamp/:page?/:pagesize?', (req, res, next) => {
  if (!req.auth(res, ['dev', 'admin'], 'basic')) return;

  const {error, value: options} = RootValidate.changelogParams({
    timestamp: req.params.timestamp,
    page: req.params.page,
    pagesize: req.params.pagesize
  });
  if (error) return res400(error, res);

  const id = new mongoose.Types
    .ObjectId(Math.floor(new Date(options.timestamp).getTime() / 1000).toString(16) + '0000000000000000');
  ChangelogModel.find({_id: {$lte: id}}).sort({_id: -1}).skip(options.page * options.pagesize).limit(options.pagesize)
    .lean().exec((err, data) => {
    if (err) return next(err);

    // validate all and filter null values from validation errors
    res.json(_.compact(data.map(e => RootValidate.changelogOutput(e))));
  });
});

module.exports = router;