"use strict";

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

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

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

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

const campaignPlayer = express.Router();

// routes **********************
campaignPlayer.route('/ranking/:campaignId')
  .get((req, res, next) => {
    WarModel.find({campaign: req.params.campaignId}, '_id', (err, wars) => {
      if (err) return next(err);
      const warIds = wars.map((obj) => {
        return obj._id;
      });
      PlayerModel.find({warId: {"$in": warIds}}, (err, items) => {
        if (err) return next(err);
        if (!items || items.length === 0) {
          const err = new Error('No players for given campaignId');
          err.status = codes.notfound;
          return next(err)
        }

        const rankingItems = [];
        new Set(items.map(x => x.name)).forEach(playerName => {
          const playerInstances = items.filter(p => p.name === playerName);
          const resItem = {name: playerName, kill: 0, death: 0, friendlyFire: 0, revive: 0, respawn: 0, flagTouch: 0};
          for (let i = 0; i < playerInstances.length; i++) {
            resItem.kill += playerInstances[i].kill;
            resItem.death += playerInstances[i].death;
            resItem.friendlyFire += playerInstances[i].friendlyFire;
            resItem.revive += playerInstances[i].revive;
            resItem.respawn += playerInstances[i].respawn;
            resItem.flagTouch += playerInstances[i].flagTouch;
          }
          resItem.fraction = playerInstances[playerInstances.length - 1].fraction;
          rankingItems.push(resItem);
        });

        function getSortedField(fieldName) {
          let num = 1;
          rankingItems.sort((a, b) => b[fieldName] - a[fieldName])
          const res = JSON.parse(JSON.stringify(rankingItems));
          for (const entity of res) {
            entity.num = num++;
          }
          return res;
        }

        res.locals.items = {
          kill: getSortedField('kill'),
          death: getSortedField('death'),
          friendlyFire: getSortedField('friendlyFire'),
          revive: getSortedField('revive'),
          respawn: getSortedField('respawn'),
          flagTouch: getSortedField('flagTouch')
        };
        next();
      })
    })
  })

  .all(
    routerHandling.httpMethodNotAllowed
  );

campaignPlayer.route('/single/:campaignId/:playerName')
  .get((req, res, next) => {
    CampaignModel.findById(req.params.campaignId, (err, campaign) => {
      if (err) return next(err);
      WarModel.find({campaign: req.params.campaignId}, '_id', (err, wars) => {
        if (err) return next(err);
        const warIds = wars.map((obj) => {
          return obj._id;
        });
        PlayerModel.find({name: req.params.playerName, warId: {"$in": warIds}})
          .populate('warId')
          .exec((err, items) => {
            if (err) return next(err);
            if (!items || items.length === 0) {
              const err = new Error('Unknown player name');
              err.status = codes.notfound;
              return next(err)
            }
            res.locals.items = {
              name: req.params.playerName,
              campaign: campaign,
              players: items
            };
            next();
          })
      })
    })
  })

  .all(
    routerHandling.httpMethodNotAllowed
  );


campaignPlayer.use(routerHandling.emptyResponse);

module.exports = campaignPlayer;