// Parse and return an LDB Request

const log  = require('../utils/logs.utils');          // Log Helper
const ldb  = require('ldbs-json');
const util = require('../utils/ldb.utils');
const san  = require('../utils/sanitizer.utils');
const db   = require('../services/dbAccess.services');

import { transform as staffStationTransform } from '../utils/translators/ldb/staffStation';

const ldbKey   = process.env.OWL_LDB_KEY;
const ldbsvKey = process.env.OWL_LDB_SVKEY;

async function get(id, staff=false){
  const cleanId = san.cleanApiEndpointTxt(id);
  const obj = await util.checkCrs(cleanId);
  try {
    const crs = obj[0]['3ALPHA'];
    log.out(`ldbService.get: Determined CRS for lookup to be: ${crs}`, 'info');
    if (staff) {
      const data = arrDepBoardStaff(crs);
      db.increment('ldbsvws');
      return await data;
    } else {
      const data = arrDepBoard(crs);
      db.increment('ldbws');
      return await data;
    }
  } catch (err) {
    log.out(`ldbService.get: Error, Unable to find CRS: ${err}`, 'info');
    return {
      ERROR:'NOT_FOUND',
      description:'The entered station was not found.'};
  }
}

async function arrDepBoard(CRS){
  log.out(`ldbService.arrDepBoard: Trying to fetch board for ${CRS}`, 'info');
  try {
    const options = {
      numRows: 10,
      crs: CRS.toUpperCase()
    };
    const api = new ldb(ldbKey,false);
    let d = await api.call('GetArrDepBoardWithDetails', options, false, false);
    return await util.cleanData(d);
  } catch (err) {
    log.out(`ldbService.arrDepBoard: Lookup Failed for: ${CRS}`, 'warn');
    return {
      GetStationBoardResult: 'not available',
      Reason: `The CRS code ${CRS} is not valid`
    };
  }
}

async function arrDepBoardStaff(CRS) {
  log.out(`ldbService.arrDepBoardStaff: Try to fetch board for ${CRS}`, 'dbug');
  try {
    const options = {
      numRows: 40,
      crs: CRS.toUpperCase(),
      getNonPassengerServices: true,
      time: await getDateTimeString(new Date),
      timeWindow: 120,
      services: 'PBS'
    };
    const api = new ldb(ldbsvKey,true);
    console.time(`Fetch Staff LDB for ${CRS.toUpperCase()}`);
    const result = await api.call('GetArrivalDepartureBoardByCRS',options,false,false);
    console.timeEnd(`Fetch Staff LDB for ${CRS.toUpperCase()}`)
    try {
      const _staffLdb = staffStationTransform(result)
      console.log("Transformation Test Successful")
      console.log(JSON.stringify(_staffLdb))
    } catch (err) {
      console.log("Transformation Test Failed: " + err)
    }
    return result
  } catch (err) {
    log.out(`ldbService.arrDepBoardStaff: Lookup Failed for: ${CRS}`, 'warn');
    log.out(`ldbService.arrDepBoardStaff: ${err}`);
    return {
      GetStationBoardResult: 'not available',
      Reason: `The CRS code ${CRS} is not valid`
    };
  }
}

async function getServiceByRID(rid) {
  log.out(`ldbService.getServiceByRID: Finding RID: ${rid}`, 'dbug');
  try {
    const options = {
      rid: String(rid)
    };
    const api = new ldb(ldbsvKey,true);
    return await api.call('GetServiceDetailsByRID', options,false,false);
  } catch (err) {
    log.out(`ldbService.queryService: ${err}`, 'EROR');
  }
}

async function getServicesByOther(id) {
  log.out(`ldbService.getServiceByOther: Finding services: ${id}`, 'dbug');
  try {
    const options = {
      serviceID: id,
      sdd: getDateString(new Date)
    };
    const api = new ldb(ldbsvKey,true);
    return await api.call('QueryServices', options, false, false);
  } catch (err) {
    log.out(`ldbService.getServiceByOther: Error: ${err}`, 'EROR');
    return false;
  }
}

async function getReasonCodeList() {
  log.out('ldbService.getReasonCodeList: Fetching reason code list', 'eror');
  try {
    const dbFilter = {};
    return await db.query('reasonCodes', dbFilter, false);
  } catch (err) {
    log.out(`ldbService.getReasonCodeList: ${err}`, 'eror');
  }
}

async function getReasonCode(code) {
  log.out(`ldbService.getReasonCode: Fetching reason code ${code}`, 'dbug');
  try {
    const dbFilter = {
      code: code
    };
    return await db.query('reasonCodes', dbFilter, false);
  } catch (err) {
    log.out(`ldbService.getReasonCode: ${err}`, 'eror');
  }
}

async function getDateTimeString(date) {

  const year = date.getFullYear(), 
    month = String(date.getMonth() + 1).padStart(2,'0'),
    day = String(date.getDate()).padStart(2,'0'),
    hour = String(date.getHours()).padStart(2,'0'),
    minute = String(date.getMinutes()).padStart(2,'0'),
    second = String(date.getSeconds()).padStart(2,'0');
  const format = `${year}-${month}-${day}T${hour}:${minute}:${second}`;
  return format;
}

async function getDateString(date) {
  const year = date.getFullYear(), 
    month = String(date.getMonth() + 1).padStart(2,'0'),
    day = String(date.getDate()).padStart(2,'0');
  const format = `${year}-${month}-${day}`;
  return format;
}

module.exports = {
  get,
  getServiceByRID,
  getServicesByOther,
  getReasonCodeList,
  getReasonCode
};