let categoriasOBG = new Object();

function actualizarLista() {
  const select = document.getElementById("listaPeriodos");
  const opciones = select.innerHTML.split("value");

  //console.log(opciones);

  let ids = [];
  let nombres = [];

  opciones.forEach((opcion) => {
    if (opcion.includes("/option")) {
      let inicialValor = opcion.indexOf("=");
      let idStr = opcion.substring(inicialValor + 2, inicialValor + 6);
      let id = parseInt(idStr);
      ids.push(id);

      let inicialNombre = opcion.indexOf(">");
      let finalNombre = opcion.indexOf("<", inicialNombre);
      nombres.push(opcion.substring(inicialNombre + 1, finalNombre));
    }
  });

  //console.log(ids);
  //console.log(nombres);

  const select2 = document.getElementById("SelectPeriodo");

  let categorias = new Object();
  let categoriasNombres = [];

  for (let i = 1; i < nombres.length; i++) {
    const nombre = nombres[i];
    const id = ids[i];

    categoria = nombre.substring(nombre.indexOf(" ") + 1);
    //console.log("nombreCategoria = "+ categoria);

    let lista = categorias[categoria];
    let ides = categorias[categoria + " id"];
    let tipos = categorias[categoria + " tipo"];
    if (lista) {
      lista.push(nombre);
      ides.push(id);

      if (nombre.includes("Pre")) {
        tipos.push("Pre");
      }
      if (nombre.includes("Pos")) {
        tipos.push("Pos");
      }
      if (nombre.includes("Idi")) {
        tipos.push("Idi");
      }
    } else {
      categorias[categoria] = [nombre];
      categorias[categoria + " id"] = [id];

      if (nombre.includes("Pre")) {
        categorias[categoria + " tipo"] = ["Pre"];
      }
      if (nombre.includes("Pos")) {
        categorias[categoria + " tipo"] = ["Pos"];
      }
      if (nombre.includes("Idi")) {
        categorias[categoria + " tipo"] = ["Ide"];
      }

      categoriasNombres.push(categoria);
    }
  }
  //console.log(categoriasNombres);
  autocomplete(document.getElementById("myInput"), categoriasNombres);
  //console.log("lista actualizada");
  return categorias;
}

function cambiarSeleccionFantasma() {
  const listaPeriodos = document.getElementById("listaPeriodos");
  const sel = document.getElementById("SelectPeriodo");
  const myInput = document.getElementById("myInput");

  //buscar id en categoriasOBG y asignarla al antiguo
  setTimeout(() => {
    try {
      //console.log(myInput.value);
      const ids = categoriasOBG[myInput.value + " id"];
      const tipos = categoriasOBG[myInput.value + " tipo"];

      //console.log(sel.value);
      tipoIndex = tipos.indexOf(sel.value);
      listaPeriodos.value = ids[tipoIndex];
    } catch (error) {
      console.log("");
    }
  }, 100);
}

function autocomplete(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:*/
  inp.addEventListener("input", function (e) {
    var a,
      b,
      i,
      val = this.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", this.id + "autocomplete-list");
    a.setAttribute("class", "autocomplete-items");
    /*append the DIV element as a child of the autocomplete container:*/
    this.parentNode.appendChild(a);
    /*for each item in the array...*/
    for (i = 0; i < arr.length; i++) {
      /*check if the item starts with the same letters as the text field value:*/
      if (arr[i].substr(0, val.length).toUpperCase() == val.toUpperCase()) {
        /*create a DIV element for each matching element:*/
        b = document.createElement("DIV");
        /*make the matching letters bold:*/
        b.innerHTML = "<strong>" + arr[i].substr(0, val.length) + "</strong>";
        b.innerHTML += arr[i].substr(val.length);
        /*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);
      }
    }
  });
  /*execute a function presses a key on the keyboard:*/
  inp.addEventListener("keydown", function (e) {
    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);
  });
  //console.log("fin");
}