"use strict";

// modules
const express = require('express');
const logger = require('debug')('cc:awardings');

// HTTP status codes by name
const codes = require('./http-codes');

const routerHandling = require('../middleware/router-handling');

// Mongoose Model using mongoDB
const AppUserModel = require('../models/app-user');

const account = express.Router();


account.route('/')
  .get((req, res, next) => {
    AppUserModel.find({}).populate('squad').exec((err, items) => {
      if (err) {
        err.status = codes.servererror;
        return next(err);
      }
      res.locals.items = items;
      res.locals.processed = true;
      next();
    })
  })
  .all(
    routerHandling.httpMethodNotAllowed
  );

// routes **********************
account.route('/:id')
  .patch((req, res, next) => {
    if (!req.body || (req.body._id && req.body._id !== req.params.id)) {
      // little bit different as in PUT. :id does not need to be in data, but if the _id and url id must match
      const err = new Error('id of PATCH resource and send JSON body are not equal ' + req.params.id + " " + req.body._id);
      err.status = codes.notfound;
      next(err);
      return; // prevent node to process this function further after next() has finished.
    }

    // increment version manually as we do not use .save(.)
    req.body.updatedAt = new Date();
    req.body.$inc = {__v: 1};

    // PATCH is easier with mongoose than PUT. You simply update by all data that comes from outside. no need to reset attributes that are missing.
    AppUserModel.findByIdAndUpdate(req.params.id, req.body, {new: true}).populate('squad').exec((err, item) => {
      if (err) {
        err.status = codes.wrongrequest;
      }
      else if (!item) {
        err = new Error("appUser not found");
        err.status = codes.notfound;
      }
      else {
        res.locals.items = item;
      }
      next(err);
    })
  })

  .delete((req, res, next) => {
    AppUserModel.findByIdAndRemove(req.params.id, (err, item) => {
      if (err) {
        err.status = codes.wrongrequest;
      }
      else if (!item) {
        err = new Error("item not found");
        err.status = codes.notfound;
      }
      // we don't set res.locals.items  and thus it will send a 204 (no content) at the end. see last handler user.use(..)
      res.locals.processed = true;
      next(err); // this works because err is in normal case undefined and that is the same as no parameter
    });
  })

  .all(
    routerHandling.httpMethodNotAllowed
  );


// this middleware function can be used, if you like or remove it
// it looks for object(s) in res.locals.items and if they exist, they are send to the client as json
account.use(routerHandling.emptyResponse);


module.exports = account;