'use strict';

// modules
const express = require('express');

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

const apiAuthenticationMiddleware = require('../middleware/auth-middleware');
const checkMT = require('../middleware/permission-check').checkMT;

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

// Mongoose Model using mongoDB
const CampaignModel = require('../models/campaign');
const WarModel = require('../models/war');

// util
const genericGetById = require('./_generic').genericGetById;
const genericPatch = require('./_generic').genericPatch;

const campaigns = new express.Router();

// routes **********************
campaigns.route('/')
         .post(apiAuthenticationMiddleware, checkMT, (req, res, next) => {
           const campaign = new CampaignModel(req.body);
           // timestamp and default are set automatically by Mongoose Schema Validation
           campaign.save((err) => {
             if (err) {
               err.status = codes.wrongrequest;
               err.message += ' in fields: ' + Object.getOwnPropertyNames(err.errors);
               return next(err);
             }
             res.status(codes.created);
             res.locals.items = campaign;
             next();
           });
         })

         .all(
           routerHandling.httpMethodNotAllowed
         );

campaigns.route('/:id')
         .get(idValidator, (req, res, next) => {
            return genericGetById(req, res, next, CampaignModel);
         })

         .patch(apiAuthenticationMiddleware, checkMT, (req, res, next) => {
           return genericPatch(req, res, next, CampaignModel);
         })

         .delete((req, res, next) => {
           CampaignModel.findByIdAndRemove(req.params.id, (err, item) => {
             if (err) {
               err.status = codes.wrongrequest;
               return next(err);
             } else if (!item) {
               err = new Error('item not found');
               err.status = codes.notfound;
               return next(err);
             }
             WarModel.find({campaign: req.params.id}).remove().exec();
             // TODO: remove all the war logs from fs here!!!
             res.locals.processed = true;
             next();
           });
         })

         .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
campaigns.use(routerHandling.emptyResponse);

module.exports = campaigns;