# Source: bemap-services/bemap-geoAutocomplete.js

    /**
     * BeNomad BeMap JavaScript API - GeoAutocomplete
     */

    /**
     * @classdesc
     * Base class for GeoAutocomplete.
     * @public
     * @constructor
     * @abstract
     * @param {bemap.Context} context BeMap-JS-API Context. Mandatory.
     * @param {object} options see below the available values.
     */
    bemap.GeoAutocomplete = function(context, options) {

      this.context = context;
      this.geoserver = context.geoserver;

      var opts = options ? options : {};

      if (opts.geoserver) {
        this.geoserver = opts.geoserver;
      }
    };

    /**
     *Autocomplete is sending only when user stop taping text in input and after option.timer time
     *@param options see below
     *@param listener return by function, list of autocomplete results
     */
    bemap.GeoAutocomplete.prototype.autocomplete = function(options, listener) {

      if (!options) {
        console.error("Options required");
      };
      if (!options.inputId) {
        console.error("Input ID required");
      };
      if (!options.countryCode) {
        console.error("Country code required");
      };
      if (!options.target) {
        console.error("Target required");
      };
      //switch to allows list of autocomplete propositions
      var showList = true
      if (!options.showList && options.showList !== undefined) {
        showList = options.showList;
      }
      //stock this class event
      var _this = this;
      var id = options.inputId;
      //call geocoder methode and pass this context
      var geo = new bemap.Geocoder(this.context);

      //set timer to send the request to the geocoder
      var typingTimer; //timer identifier
      var doneTypingInterval = options.timer ? options.timer : 2000; //time in ms

      //on keyup, start the countdown
      id[0].addEventListener("input", function(e) {

        var countryCode = options.countryCode
        if (typeof countryCode !== 'string') {
          countryCode = options.countryCode.val()
        };
        //initialize geocoder elements
        var elements = {
          searchInfo: new bemap.GeoSearchInfo({
            searchType: options.searchType ? options.searchType : "CONTAINS",
            countryCode: countryCode,
            country: options.country,
            language: options.language ? options.language : '',
            maxResult: options.maxResult ? options.maxResult : 10
          })
        }
        //after every click
        clearTimeout(typingTimer);
        if ($(id).val()) {
          //requires city if search street if not algorythm not working
          if (options.target == "street") {
            if (!options.city) {
              console.error("City required");
            } else {
              var city = options.city;
              if (typeof city !== 'string') {
                city = options.city.val();
              }
              elements.searchInfo.city = city;
            };
          };
          //check if parametr of research exist
          if (elements.searchInfo[options.target] !== undefined) {
            elements.searchInfo[options.target] = $(id).val()
          } else {
            console.error("Target do not exist");
          }
          //the request is sending when user stop taping and after option.timer
          typingTimer = setTimeout(function() {
            //create success call for the geocode methode chack geocode documentation
            elements.success = function(response, doc, object, xhr) {

              //prepare list of results
              var countries = [];
              for (var i = 0; i < response.geocodingItems.length; i++) {
                var address = response.geocodingItems[i].PostalAddress[0][options.target]

                if (address !== null) {
                  countries.push(address)
                }
              }
              //show list by calling showList methode if true
              if (countries.length !== 0) {
                if (showList) {
                  _this.showList(id[0], countries);
                };
                //sent the result if listener
                if (listener) {
                  listener(countries)
                };
              } else {
                console.log('The result of autocomplete not found');
              };
            } //end of success element

            //call geocode methode from Geocoding class
            console.log(elements);
            geo.geocode(elements);

          }, doneTypingInterval);
        } //end of input veryfication
      }); //end of input change
    }

    /**
     *This methode was found on the net to prevent charging jQuery UI lib with nice autocomplete functionality
     *@param inp - id of input field
     *@param arr - result of geocoding already filtred
     */
    bemap.GeoAutocomplete.prototype.showList = function(inp, arr) {
      /*the autocomplete function takes two arguments,
      the text field element and an array of possible autocompleted values:*/
      var currentFocus;
      /*execute a function when someone writes in the text field:*/
      var a, b, i, val = inp.value;
      /*close any already open lists of autocompleted values*/
      closeAllLists();
      if (!val) {
        return false;
      }
      currentFocus = -1;
      /*create a DIV element that will contain the items (values):*/
      a = document.createElement("DIV");
      a.setAttribute("id", inp.id + "autocomplete-list");
      a.setAttribute("class", "autocomplete-items");
      /*append the DIV element as a child of the autocomplete container:*/
      inp.parentNode.appendChild(a);
      /*for each item in the array...*/
      for (i = 0; i < arr.length; i++) {
        //check at which position tapping value apears in arr stringify
        var item = arr[i].toUpperCase()
        var getIdx = item.indexOf(val.toUpperCase())
        /*create a DIV element for each matching element:*/
        b = document.createElement("DIV");
        /*make the matching letters bold:*/
        if (getIdx >= 0) {
          b.innerHTML += arr[i].substr(0, getIdx);
          b.innerHTML += "<strong>" + arr[i].substr(getIdx, val.length) + "</strong>";
          b.innerHTML += arr[i].substr(val.length + getIdx);
        } else {
          b.innerHTML = arr[i]
        }
        /*insert a input field that will hold the current array item's value:*/
        b.innerHTML += "<input type='hidden' value='" + arr[i] + "'>";
        /*execute a function when someone clicks on the item value (DIV element):*/
        b.addEventListener("click", function(e) {
          /*insert the value for the autocomplete text field:*/
          inp.value = this.getElementsByTagName("input")[0].value;
          /*close the list of autocompleted values,
          (or any other open lists of autocompleted values:*/
          closeAllLists();
        });
        a.appendChild(b);
      }
      //detect if listener was already added to the input
      if (inp.getAttribute('listener') !== 'true') {
        /*execute a function presses a key on the keyboard:*/
        inp.addEventListener("keydown", function(e) {

          this.setAttribute('listener', 'true');
          var x = document.getElementById(this.id + "autocomplete-list");
          if (x) x = x.getElementsByTagName("div");
          if (e.keyCode == 40) {
            /*If the arrow DOWN key is pressed,
            increase the currentFocus variable:*/
            currentFocus++;
            /*and and make the current item more visible:*/
            addActive(x);
          } else if (e.keyCode == 38) { //up
            /*If the arrow UP key is pressed,
            decrease the currentFocus variable:*/
            currentFocus--;
            /*and and make the current item more visible:*/
            addActive(x);
          } else if (e.keyCode == 13) {
            /*If the ENTER key is pressed, prevent the form from being submitted,*/
            e.preventDefault();
            if (currentFocus > -1) {
              /*and simulate a click on the "active" item:*/
              if (x) x[currentFocus].click();
            }
          }
        });
      }

      function addActive(x) {
        /*a function to classify an item as "active":*/
        if (!x) return false;
        /*start by removing the "active" class on all items:*/
        removeActive(x);
        if (currentFocus >= x.length) currentFocus = 0;
        if (currentFocus < 0) currentFocus = (x.length - 1);
        /*add class "autocomplete-active":*/
        x[currentFocus].classList.add("autocomplete-active");
      }

      function removeActive(x) {
        /*a function to remove the "active" class from all autocomplete items:*/
        for (var i = 0; i < x.length; i++) {
          x[i].classList.remove("autocomplete-active");
        }
      }

      function closeAllLists(elmnt) {
        /*close all autocomplete lists in the document,
        except the one passed as an argument:*/
        var x = document.getElementsByClassName("autocomplete-items");
        for (var i = 0; i < x.length; i++) {
          if (elmnt != x[i] && elmnt != inp) {
            x[i].parentNode.removeChild(x[i]);
          }
        }
      }
      /*execute a function when someone clicks in the document:*/
      document.addEventListener("click", function(e) {
        closeAllLists(e.target);
      });
    }