const router = require("express").Router();
const _ = require('lodash')
const getSearchPresets = require("../models/getSearchPresets.js");
const base64 = require("../util/base64.js")
const sas = require("../util/scoreAndSearch.js");
const { filter } = require("lodash");


module.exports = dbConn => {
  router.get("/api/v1/search", searchHandler(dbConn));
  router.get("/api/v1/search/presets", presetHandler(dbConn));

  return router;
};

function presetHandler(dbConn) {
  return function (req, res) {
    getSearchPresets(dbConn).then(presets => {
      res.json(presets)
    }).catch(error => {
      // TODO error handling
    })
  }
}

function searchHandler(dbConn) {
  const scoreAndSearch = sas(dbConn)
  return function (req, res) {
    let response = {}

    response.meta = {
      params: req.params,
      query: req.query,
      headers: req.headers
    }

    let q = req.query.q ? base64.base64ToObj(req.query.q) : req.query
    console.log('Q:', q)

    let scoreQueryObj = {}
    if (q.temperature) scoreQueryObj['temperature_mean_max'] = q.temperature
    if (q.temperature_mean_max) scoreQueryObj['temperature_mean_max'] = q.temperature_mean_max
    if (q.precipitation) scoreQueryObj['precipitation'] = q.precipitation
    if (q.rain_days) scoreQueryObj['rain_days'] = q.rain_days
    if (q.sun_hours) scoreQueryObj['sun_hours'] = q.sun_hours

    if (q.accommodation_costs) scoreQueryObj['accommodation_costs'] = q.accommodation_costs
    if (q.food_costs) scoreQueryObj['food_costs'] = q.food_costs
    if (q.alcohol_costs) scoreQueryObj['alcohol_costs'] = q.alcohol_costs
    if (q.water_costs) scoreQueryObj['water_costs'] = q.water_costs
    if (q.local_transportation_costs) scoreQueryObj['local_transportation_costs'] = q.local_transportation_costs
    if (q.entertainment_costs) scoreQueryObj['entertainment_costs'] = q.entertainment_costs
    if (q.average_per_day_costs) scoreQueryObj['average_per_day_costs'] = q.average_per_day_costs

    //console.log(scoreQueryObj)

    // if (_.isEmpty(scoreQueryObj)) {
    //   res.status(400).send('provide at least one search parameter.');
    // }
    scoreAndSearch(q.from, q.to, scoreQueryObj).then(searchResults => {

      //response.data = searchResults
      // FILTER if query contains filterString
      if (q.textfilter) {
        response = filterByString(searchResults, q.textfilter, q.fulltext)
      } else {
        response = searchResults
      }

      // FILTER NULLSCORES
      if (_.get(q, 'showRegionsWithNullScore', false)) {
        console.log('without null scores');
        response = response.filter(el => !_.some(el.scores, score => _.isNaN(score.score) || _.isNull(score.score) || _.isUndefined(score.score)))//.filter(el => !_.isNaN(el.score))
      }
      // SEND RESPONSE
      res.json(response)

    }).catch(e => {
      // TODO error handling
      console.log(e)
      res.status(400).send(e.message)
    })
  }
}

function filterByString(searchResults, filterString, boolFulltext) {
  return _.filter(searchResults, region => {
    // console.log("filtering: filterString, boolFulltext");
    // console.log(filterString, boolFulltext);
    filterString = filterString.toLowerCase()
    let name = region.name.toLowerCase()
    let country = region.country.toLowerCase()
    if (boolFulltext) {
      let desc = region.description.toLowerCase()
      return name.includes(filterString) || country.includes(filterString) || desc.includes(filterString)
    }
    return name.includes(filterString) || country.includes(filterString)
  })
}