/* ----------------------------------------------------------------------------

 Question Server
 GitLab: <https://gitlab.com/MrFry/mrfrys-node-server>

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.

 ------------------------------------------------------------------------- */

export default {
  LogId: LogId,
  Load: Load,
}

import utils from '../utils/utils'
import logger from '../utils/logger'
const idStatFile = 'stats/idstats'
const idVStatFile = 'stats/idvstats'

const writeInterval = 1

let idStatsData = {}
let idvStatsData = {}
let writes = 0

function Load(): void {
  try {
    idStatsData = utils.ReadJSON(idStatFile)
  } catch (err) {
    logger.Log(
      'Error at loading id logs! (@ first run its normal)',
      logger.GetColor('redbg')
    )
    console.error(err)
  }

  try {
    const prevVData = utils.ReadFile(idVStatFile)
    idvStatsData = JSON.parse(prevVData)
  } catch (err) {
    logger.Log(
      'Error at loading id logs! (@ first run its normal)',
      logger.GetColor('redbg')
    )
    console.error(err)
  }
}

function LogId(
  id: number,
  subj: string,
  newQuestions: number,
  allQuestions: number
): void {
  Inc(id, subj, newQuestions, allQuestions)
  AddVisitStat(id, subj, newQuestions, allQuestions)
  Save()
}

function AddSubjToList(list: Array<string>, subj: string) {
  if (!list[subj]) {
    list[subj] = 0
  }
  list[subj]++
}

function Inc(
  value: number,
  subj: string,
  newQuestions: number,
  allQuestions: number
) {
  if (idStatsData[value] === undefined) {
    idStatsData[value] = {
      count: 0,
      newQuestions: 0,
      allQuestions: 0,
      subjs: {},
    }
  }
  idStatsData[value].count++
  idStatsData[value].newQuestions += newQuestions
  idStatsData[value].allQuestions += allQuestions
  AddSubjToList(idStatsData[value].subjs, subj)
}

function AddVisitStat(
  name: number,
  subj: string,
  newQuestions: number,
  allQuestions: number
) {
  const date = new Date()
  const now =
    date.getFullYear() +
    '-' +
    ('0' + (date.getMonth() + 1)).slice(-2) +
    '-' +
    ('0' + date.getDate()).slice(-2)
  if (idvStatsData[now] === undefined) {
    idvStatsData[now] = {}
  }
  if (idvStatsData[now][name] === undefined) {
    idvStatsData[now][name] = {
      count: 0,
      newQuestions: 0,
      allQuestions: 0,
      subjs: {},
    }
  }
  idvStatsData[now][name].count++
  idvStatsData[now][name].newQuestions += newQuestions
  idvStatsData[now][name].allQuestions += allQuestions
  AddSubjToList(idvStatsData[now][name].subjs, subj)
}

function Save() {
  writes++
  if (writes === writeInterval) {
    try {
      utils.WriteFile(JSON.stringify(idStatsData), idStatFile)
      // Log("Stats wrote.");
    } catch (err) {
      logger.Log('Error at writing logs!', logger.GetColor('redbg'))
      console.error(err)
    }
    try {
      utils.WriteFile(JSON.stringify(idvStatsData), idVStatFile)
      // Log("Stats wrote.");
    } catch (err) {
      logger.Log('Error at writing visit logs!', logger.GetColor('redbg'))
      console.error(err)
    }
    writes = 0
  }
}