/**
 * @author Aaron Group s.r.o.
 */
// *********************************** //
// Funkce pro prediktivni vyhledavani  //
// *********************************** //
  //definice poli daty pro funkce
  var gDestinationListIATA = Array();
  var gDestinationListCities = Array();
  var gDestinationListCitiesIndex = Array();
  var gDestinationListCountries = Array();
  var gDestinationListCountriesIndex = Array();
  var gDestinationListAirports = Array();
  var gDestinationListAirportsIndex = Array();
  
  var nMinOptionLinesCount = 5;
  var nMaxOptionLinesCount = 15;
  var nMaxAvailOptionsCount = 50;
  var aActiveFields = new Array();

  /**
   * Najde vnoreny element - vrati ID elementu
   */
  function searchChildNodeByTagName(p_parentObjectID, p_tagName) {
    var oTargetObject = null;
    var oTargetSelect = null;
    var sNodeName = "";
    var sNodeID = null;

    try {
      oTargetObject = document.getElementById(p_parentObjectID);
    } catch(eException) {}

    for(nCounter = 0; nCounter < oTargetObject.childNodes.length; nCounter++) {
      sNodeName = oTargetObject.childNodes[nCounter].nodeName;
      sNodeName = sNodeName.toUpperCase();
      if(sNodeName = p_tagName.toUpperCase()) {
        try {
          sNodeID = oTargetObject.childNodes[nCounter].id;
        } catch(eException) {}
      }
    }
    return sNodeID;
  }
  
  /**
   * Zobrazi nalezene shody (zadava se pouze id DIVu s napovedou a reference na INPUT).
   */
  function showAvailableDestinationsFast(p_targetObjectID, p_referenceObject, p_eEvent) {
    var sNodeID = null;

    sNodeID = searchChildNodeByTagName(p_targetObjectID, "SELECT");
 
    // Zavola metodu s doplnenym selectem.
    showAvailableDestinations(p_targetObjectID, sNodeID, p_referenceObject, p_eEvent);
  }
  
  /**
   * Zobrazi nalezene shody
   */
  function showAvailableDestinations(p_targetObjectID, p_targetSelectID, p_referenceObject, p_eEvent) {
    var sWrittenString = null;
    var oTargetObject = null;
    var aResultList = null;
    var bIataCodeFound = false;
    var nKeyCode = null;
    
    try {
      sWrittenString = p_referenceObject.value;
      oTargetObject = document.getElementById(p_targetObjectID);
      oTargetSelect = document.getElementById(p_targetSelectID);
    } catch(eException) {}

    try {
      nKeyCode = p_eEvent.keyCode;
    } catch(eException) {
      try {
        nKeyCode = p_eEvent.which;
      } catch(eException2) {}
    }
    
    // Po stisku sipky dolu presune vyber na moznosti.
    if(nKeyCode == 40) {
      setSelectBoxActive(p_targetSelectID);
    }
	
	// Po stisku klavesy Enter nastavi hodnotu z nabidky.
    if(nKeyCode == 13) {
      try {
        if(document.getElementById(p_targetSelectID).options.length > 0) {
          p_referenceObject.value = document.getElementById(p_targetSelectID).options[document.getElementById(p_targetSelectID).selectedIndex].innerHTML;
        }
      } catch(eException) {
      }
      hideAvailableDestinationsById(p_targetObjectID, true);
      return false;
    }

    resetDestinationFields(oTargetSelect);
    
    // Pokud je znaku mene jak 3, skryje napovedu.
    if(sWrittenString.length < 3) {
      hideAvailableDestinations(oTargetObject);
    }
    
    // Pokud je znaku 3 a vice, zobrazi napovedu.
    if(sWrittenString.length >= 3) {
      // Pro 3 znaky hleda podle IATA kodu.
      aResultList = searchInIataCodes(sWrittenString);

      // Hleda podle nazvu letiste.
      if(aResultList.length == 0) {
        aResultList = searchInAirportNames(sWrittenString);
      } else {
        aResultList = mergeArrays(aResultList, searchInAirportNames(sWrittenString));
      }

      // Hleda podle nazvu mesta.
      if(aResultList.length == 0) {
        aResultList = searchInCityNames(sWrittenString);
      } else {
        aResultList = mergeArrays(aResultList, searchInCityNames(sWrittenString));
      }

      // Hleda podle nazvu zeme.
      if(aResultList.length == 0) {
        aResultList = searchInCountryNames(sWrittenString);
      } else {
        aResultList = mergeArrays(aResultList, searchInCountryNames(sWrittenString));
      }

      // Zobrazi vysledky - pokud je nalezena alespon 1 moznost. 
      if(aResultList.length > 0) {
        for(nCounter = 0; nCounter < aResultList.length; nCounter++) {
          addDestinationElementRecord(oTargetObject, oTargetSelect, gDestinationListCities[aResultList[nCounter]], gDestinationListIATA[aResultList[nCounter]], gDestinationListAirports[aResultList[nCounter]], gDestinationListCountries[aResultList[nCounter]]);
        }
        if(aResultList.length <= nMinOptionLinesCount) {
          oTargetSelect.size = nMinOptionLinesCount;
        }
      }
    }
  }
  
  /**
   * Prida radek do vysledku
   */
  function addDestinationElementRecord(p_targetObject, p_targetSelect, p_City, p_IataCode, p_Airport, p_Country) {
    var nLastOptionIndex = p_targetSelect.options.length;
    
    if(nLastOptionIndex < 0) {
      nLastOptionIndex = 1;
    }
    
    if(nLastOptionIndex >= 0) {
      p_targetObject.style.visibility = "visible";
      p_targetObject.style.display = "block";
    }
    if((p_IataCode != "undefined") && (p_IataCode != null)){
      p_targetSelect.size = nLastOptionIndex + 1;
      p_targetSelect.options[nLastOptionIndex] = new Option(p_City + ', ' + p_Airport + ', ' + p_Country + ' (' + p_IataCode + ')', p_IataCode);
    }
    
    // Pokud je pocet radku vetsi, nez povoleny limit, vytvori scrollbar.
    if(p_targetSelect.size > nMaxOptionLinesCount) {
      p_targetSelect.size = nMaxOptionLinesCount;
    }
  }
  
  /**
   * Odstrani zaznamy z nabidky
   */
  function resetDestinationFields(p_targetSelect) {
    p_targetSelect.options.length = 0;
  }

  /**
   * Prohleda IATA kody
   */
  function searchInIataCodes(p_searchString) {
    var aIataCodesList = new Array();
    var nIndex = 0;
    
    for(nCounter = 0; nCounter < gDestinationListIATA.length; nCounter++) {
      if(gDestinationListIATA[nCounter] == p_searchString.toUpperCase()) {
        aIataCodesList[nIndex] = nCounter;
        nIndex += 1;
      }
    }

    return aIataCodesList;
  }
  
  /**
   * Prohleda nazvy letist
   */
  function searchInAirportNames(p_searchString) {
    var aAirportNamesList = new Array();
    var nIndex = 0;
    var nWordLength = p_searchString.length;
    var sMatchWord = null;
    var sMatchWord2 = null;
    
    for(nCounter = 0; nCounter < gDestinationListAirports.length; nCounter++) {
      sMatchWord = gDestinationListAirports[nCounter].substring(0, nWordLength);
      sMatchWord = sMatchWord.toUpperCase();
      sMatchWord2 = gDestinationListAirportsIndex[nCounter].substring(0, nWordLength);
      sMatchWord2 = sMatchWord2.toUpperCase();
      if((sMatchWord == p_searchString.toUpperCase()) || (sMatchWord2 == p_searchString.toUpperCase())) {
        aAirportNamesList[nIndex] = nCounter;
        nIndex += 1;
      }
    }

    return aAirportNamesList;
  }
  
  /**
   *  Prohleda nazvy mest, vcetne diakritiky
   */
  function searchInCityNames(p_searchString) {
    var aCityNamesList = new Array();
    var nIndex = 0;
    var nWordLength = p_searchString.length;
    var sMatchWord = null;
    var sMatchWord2 = null;
    
    for(nCounter = 0; nCounter < gDestinationListCitiesIndex.length; nCounter++) {
      sMatchWord = gDestinationListCities[nCounter].substring(0, nWordLength);
      sMatchWord = sMatchWord.toUpperCase();
      sMatchWord2 = gDestinationListCitiesIndex[nCounter].substring(0, nWordLength);
      sMatchWord2 = sMatchWord2.toUpperCase();
      if((sMatchWord == p_searchString.toUpperCase()) || (sMatchWord2 == p_searchString.toUpperCase())) {
        aCityNamesList[nIndex] = nCounter;
        nIndex += 1;
      }
    }

    return aCityNamesList;
  }
  
  /**
   * Prohleda nazvy zemi, vcetne diakritiky.
   */
  function searchInCountryNames(p_searchString) {
    var aCountryNamesList = new Array();
    var nIndex = 0;
    var nWordLength = p_searchString.length;
    var sMatchWord = "";
    
    for(nCounter = 0; nCounter < gDestinationListCountries.length; nCounter++) {
      sMatchWord = gDestinationListCountries[nCounter].substring(0, nWordLength);
      sMatchWord = sMatchWord.toUpperCase();
      sMatchWord2 = gDestinationListCountriesIndex[nCounter].substring(0, nWordLength);
      sMatchWord2 = sMatchWord2.toUpperCase();
      if((sMatchWord == p_searchString.toUpperCase()) || (sMatchWord2 == p_searchString.toUpperCase())) {
        aCountryNamesList[nIndex] = nCounter;
        nIndex += 1;
      }
    }

    return aCountryNamesList;
  }
  
  /**
   * Skryje napovedu (dle ID objektu)
   */
  function hideAvailableDestinationsById(p_targetObjectID, p_forceHide) {
    // ID selectboxu vnoreneho do vrstvy, ktera se skryva. 
    var sChildSelectBoxID = null;
    var bHidingEnabled = true;
    
    // Vrstva, ktera se skryva.
    p_targetObject = document.getElementById(p_targetObjectID);
    // Ziska ID selectu vnoreneho do vrstvy.
    sChildSelectBoxID = searchChildNodeByTagName(p_targetObjectID, "SELECT");
    try {
      // Pokud ma select nastaven priznak "focused", nastavi priznak "aktivni". 
      if(aActiveFields[sChildSelectBoxID] == true) {
        bHidingEnabled = false;
      }
    } catch(eException) {}
    // Pokud neni selectbox oznacen jako aktivni, skryje vrstvu s danou prediktivni napovedou.
    if(bHidingEnabled || p_forceHide) {
      try {
      	setTimeout("hideAvailableDestinations(p_targetObject);", 100);
        //hideAvailableDestinations(p_targetObject);
        aActiveFields[sChildSelectBoxID] = null;
      } catch(eException) {}
    }
  }
  
  /**
   * Skryje napovedu
   */
  function hideAvailableDestinations(p_targetObject) {
    p_targetObject.style.visibility = "hidden";
    p_targetObject.style.display = "none";
  }
  
  /**
   * Slouci do pole neduplicitni polozky
   */
  function mergeArrays(p_array1, p_array2) {
    var aResultArray = new Array();
    var bItemAlreadyPresent = false;
    
    aResultArray = p_array1;
    // Pokud druhe pole nic neobsahuje, vraci rovnou pouze prvni pole. 
    if(p_array2 == null) {
      return aResultArray;
    }
    
    for(nCounter = 0; nCounter < p_array2.length; nCounter++) {
      bItemAlreadyPresent = false;
      for(nCounter2 = 0; nCounter2 < aResultArray.length; nCounter2++) {
        if(p_array2[nCounter] == aResultArray[nCounter2]) {
          bItemAlreadyPresent = true;
        }
      }
      if(bItemAlreadyPresent == false) {
        aResultArray[aResultArray.length] = p_array2[nCounter];
      }
    }
    return aResultArray;
  }
  
  /**
   * Nastavi hodnotu do pole
   */
  function setLocationValue(p_targetObjectID, p_targetListID, p_sourceObject, eEvent) {
    var oTargetObject = null;
    var sEventType = null;
    var nKeyCode = null;
    
    // Zjisti typ udalosti.
    try {
      sEventType = eEvent.type;
    } catch(eException) {}
    
    // Zjisti stisknutou klavesu (detekce Enter).
    if(sEventType == "keypress") {
      try {
        nKeyCode = eEvent.keyCode;
      } catch(eException) {
        try {
          nKeyCode = eEvent.which;
        } catch(eException2) {}
      }
    }
    
    // Pokud je vybrana nabidka kliknutim, nebo klavesou Enter, nastavi se vybrana hodnota.
    if((sEventType == "click") || (nKeyCode == 13)) {
      try {
        oTargetObject = document.getElementById(p_targetObjectID);
        oTargetObject.value = p_sourceObject.options[p_sourceObject.options.selectedIndex].innerHTML;
        hideAvailableDestinations(document.getElementById(p_targetListID));
        oTargetObject.focus();
      } catch(eException) {}
    }
    return false;
  }
  
  /**
   * Nastavi pole s vyberem jako aktivni
   */
  function setSelectBoxActive(p_targetListID) {
    document.getElementById(p_targetListID).focus();
    // Nastavi do globalni promenne ID pole, ktere je aktivni. 
    aActiveFields[p_targetListID] = true;
  }