/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

var gTotalSearchTerms=0;
var gSearchTermList;
var gSearchTerms = new Array;
var gSearchRemovedTerms = new Array;
var gSearchScope;
var gSearchBooleanRadiogroup;

var gUniqueSearchTermCounter = 0; // gets bumped every time we add a search term so we can always 
                                  // dynamically generate unique IDs for the terms.

// cache these so we don't have to hit the string bundle for them
var gMoreButtonTooltipText;
var gLessButtonTooltipText;
var gLoading = true;


function searchTermContainer() {}

searchTermContainer.prototype = {
    internalSearchTerm : '',
    internalBooleanAnd : '',

    // this.searchTerm: the actual nsIMsgSearchTerm object
    get searchTerm() { return this.internalSearchTerm; },
    set searchTerm(val) {
        this.internalSearchTerm = val;

        var term = val;
        // val is a nsIMsgSearchTerm
        var searchAttribute=this.searchattribute;
        var searchOperator=this.searchoperator;
        var searchValue=this.searchvalue;

        // now reflect all attributes of the searchterm into the widgets
        if (searchAttribute)
        {
          // for custom, the value is the custom id, not the integer attribute
          if (term.attrib == Components.interfaces.nsMsgSearchAttrib.Custom)
            searchAttribute.value = term.customId;
          else
            searchAttribute.value = term.attrib;
        }
        if (searchOperator) searchOperator.value = val.op;
        if (searchValue) searchValue.value = term.value;

        this.booleanAnd = val.booleanAnd;
        this.matchAll = val.matchAll;
        return val;
    },

    // searchscope - just forward to the searchattribute
    get searchScope() {
        if (this.searchattribute)
          return this.searchattribute.searchScope;
        return undefined;
    },
    set searchScope(val) {
        var searchAttribute = this.searchattribute;
        if (searchAttribute) searchAttribute.searchScope=val;
        return val;
    },

    saveId: function (element, slot) {
        this[slot] = element.id;
    },

    getElement: function (slot) {
        return document.getElementById(this[slot]);
    },

    // three well-defined properties:
    // searchattribute, searchoperator, searchvalue
    // the trick going on here is that we're storing the Element's Id,
    // not the element itself, because the XBL object may change out
    // from underneath us
    get searchattribute() { return this.getElement("internalSearchAttributeId"); },
    set searchattribute(val) {
        this.saveId(val, "internalSearchAttributeId");
        return val;
    },
    get searchoperator() { return this.getElement("internalSearchOperatorId"); },
    set searchoperator(val) {
        this.saveId(val, "internalSearchOperatorId");
        return val;
    },
    get searchvalue() { return this.getElement("internalSearchValueId"); },
    set searchvalue(val) {
        this.saveId(val, "internalSearchValueId");
        return val;
    },

    booleanNodes: null,
    get booleanAnd() { return this.internalBooleanAnd; },
    set booleanAnd(val) {
        this.internalBooleanAnd = val;
        return val;
    },

    save: function () {
        var searchTerm = this.searchTerm;
        var nsMsgSearchAttrib = Components.interfaces.nsMsgSearchAttrib;

        if (isNaN(this.searchattribute.value)) // is this a custom term?
        {
          searchTerm.attrib = nsMsgSearchAttrib.Custom;
          searchTerm.customId = this.searchattribute.value;
        }
        else
        {
          searchTerm.attrib = this.searchattribute.value;
        }

        if (this.searchattribute.value > nsMsgSearchAttrib.OtherHeader && this.searchattribute.value < nsMsgSearchAttrib.kNumMsgSearchAttributes) 
          searchTerm.arbitraryHeader = this.searchattribute.label;
        searchTerm.op = this.searchoperator.value;
        if (this.searchvalue.value)
            this.searchvalue.save();
        else
            this.searchvalue.saveTo(searchTerm.value);
        searchTerm.value = this.searchvalue.value;
        searchTerm.booleanAnd = this.booleanAnd;
        searchTerm.matchAll = this.matchAll;
    },
    // if you have a search term element with no search term
    saveTo: function(searchTerm) {
        this.internalSearchTerm = searchTerm;
        this.save();
    }
}

var nsIMsgSearchTerm = Components.interfaces.nsIMsgSearchTerm;

function initializeSearchWidgets() 
{    
    gSearchBooleanRadiogroup = document.getElementById("booleanAndGroup");
    gSearchTermList = document.getElementById("searchTermList");

    // initialize some strings
    var bundle = document.getElementById('bundle_search');
    gMoreButtonTooltipText = bundle.getString('moreButtonTooltipText');
    gLessButtonTooltipText = bundle.getString('lessButtonTooltipText');
}

function initializeBooleanWidgets() 
{
    var booleanAnd = true;
    var matchAll = false;
    // get the boolean value from the first term
    var firstTerm = gSearchTerms[0].searchTerm;
    if (firstTerm)
    {
        // If there is a second term, it should actually define whether we're
        //  using 'and' or not.  Note that our UI is not as rich as the
        //  underlying search model, so there's the potential to lose here when
        //  grouping is involved.
        booleanAnd = (gSearchTerms.length > 1) ?
            gSearchTerms[1].searchTerm.booleanAnd : firstTerm.booleanAnd;
        matchAll = firstTerm.matchAll;
    }
    // target radio items have value="and" or value="or" or "all"
    gSearchBooleanRadiogroup.value = matchAll 
      ? "matchAll"
      : (booleanAnd ? "and" : "or")
    var searchTerms = document.getElementById("searchTermList");
    if (searchTerms)
      updateSearchTermsListbox(matchAll);
}

function initializeSearchRows(scope, searchTerms)
{
    for (var i = 0; i < searchTerms.Count(); i++) {
        var searchTerm = searchTerms.QueryElementAt(i, nsIMsgSearchTerm);
        createSearchRow(i, scope, searchTerm, false);
        gTotalSearchTerms++;
    }
    initializeBooleanWidgets();
    updateRemoveRowButton();
}

/**
 * Enables/disables all the visible elements inside the search terms listbox.
 *
 * @param matchAllValue boolean value from the first search term
 */
function updateSearchTermsListbox(matchAllValue)
{
  var searchTerms = document.getElementById("searchTermList");
  searchTerms.setAttribute("disabled", matchAllValue);
  var searchAttributeList = searchTerms.getElementsByTagName("searchattribute");
  var searchOperatorList = searchTerms.getElementsByTagName("searchoperator");
  var searchValueList = searchTerms.getElementsByTagName("searchvalue");
  for (var i = 0; i < searchAttributeList.length; i++) {
      searchAttributeList[i].setAttribute("disabled", matchAllValue);
      searchOperatorList[i].setAttribute("disabled", matchAllValue);
      searchValueList[i].setAttribute("disabled", matchAllValue);
      if (!matchAllValue)
        searchValueList[i].removeAttribute("disabled");
  }
  var moreOrLessButtonsList = searchTerms.getElementsByTagName("button");
  for (var i = 0; i < moreOrLessButtonsList.length; i++) {
      moreOrLessButtonsList[i].setAttribute("disabled", matchAllValue);
  }
  if (!matchAllValue)
    updateRemoveRowButton();
}

// enables/disables the less button for the first row of search terms.
function updateRemoveRowButton()
{
  var firstListItem = gSearchTermList.getItemAtIndex(0);
  if (firstListItem)
    firstListItem.lastChild.lastChild.setAttribute("disabled", gTotalSearchTerms == 1);
}
 
// Returns the actual list item row index in the list of search rows
// that contains the passed in element id.
function getSearchRowIndexForElement(aElement)
{
  var listItem = aElement;
  
  while (listItem && listItem.localName != "listitem")
    listItem = listItem.parentNode;
    
  return gSearchTermList.getIndexOfItem(listItem);
}

function onMore(event)
{
  // if we have an event, extract the list row index and use that as the row number
  // for our insertion point. If there is no event, append to the end....
  var rowIndex; 

  if (event)
    rowIndex = getSearchRowIndexForElement(event.target) + 1;
  else
    rowIndex = gSearchTermList.getRowCount();

  createSearchRow(rowIndex, gSearchScope, null, event != null);
  gTotalSearchTerms++;
  updateRemoveRowButton();

  // the user just added a term, so scroll to it
  gSearchTermList.ensureIndexIsVisible(rowIndex);
}

function onLess(event)
{
  if (event && gTotalSearchTerms > 1) 
  {
    removeSearchRow(getSearchRowIndexForElement(event.target));    
    --gTotalSearchTerms;
  }

  updateRemoveRowButton();
}

// set scope on all visible searchattribute tags
function setSearchScope(scope) 
{
  gSearchScope = scope;
  for (var i = 0; i < gSearchTerms.length; i++)
  {
    // don't set element attributes if XBL hasn't loaded
    if (!(gSearchTerms[i].obj.searchattribute.searchScope === undefined))
    {
      gSearchTerms[i].obj.searchattribute.searchScope = scope;
      // act like the user "selected" this, see bug #202848
      gSearchTerms[i].obj.searchattribute.onSelect(null /* no event */);
    }
    gSearchTerms[i].scope = scope;
  }
}

function updateSearchAttributes()
{
    for (var i=0; i<gSearchTerms.length; i++) 
        gSearchTerms[i].obj.searchattribute.refreshList();
    }

function booleanChanged(event) {
    // when boolean changes, we have to update all the attributes on the search terms
    var newBoolValue = (event.target.getAttribute("value") == "and");
    var matchAllValue = (event.target.getAttribute("value") == "matchAll");
    if (document.getElementById("abPopup")) {
      var selectedAB = document.getElementById("abPopup").selectedItem.value;
      setSearchScope(GetScopeForDirectoryURI(selectedAB));
    }
    for (var i=0; i<gSearchTerms.length; i++) {
        var searchTerm = gSearchTerms[i].obj;
        searchTerm.booleanAnd = newBoolValue;
        searchTerm.matchAll = matchAllValue;
    }
    var searchTerms = document.getElementById("searchTermList");
    if (searchTerms)
    {
      if (!matchAllValue && searchTerms.hidden && !gTotalSearchTerms)
        onMore(null); // fake to get empty row.
      updateSearchTermsListbox(matchAllValue);
    }
}

/**
 * Create a new search row with all the needed elements.
 *
 * @param index       index of the position in the menulist where to add the row
 * @param scope       a nsMsgSearchScope constant indicating scope of this search rule
 * @param searchTerm  nsIMsgSearchTerm object to hold the search term
 * @param aUserAdded  boolean indicating if the row addition was initiated by the user
 *                    (e.g. via the '+' button)
 */
function createSearchRow(index, scope, searchTerm, aUserAdded)
{
    var searchAttr = document.createElement("searchattribute");
    var searchOp = document.createElement("searchoperator");
    var searchVal = document.createElement("searchvalue");

    var moreButton = document.createElement("button");
    var lessButton = document.createElement("button");
    moreButton.setAttribute("class", "small-button");
    moreButton.setAttribute("oncommand", "onMore(event);");
    moreButton.setAttribute('label', '+');
    moreButton.setAttribute('tooltiptext', gMoreButtonTooltipText);
    lessButton.setAttribute("class", "small-button");
    lessButton.setAttribute("oncommand", "onLess(event);");    
    lessButton.setAttribute('label', '\u2212');
    lessButton.setAttribute('tooltiptext', gLessButtonTooltipText);

    // now set up ids:
    searchAttr.id = "searchAttr" + gUniqueSearchTermCounter;
    searchOp.id  = "searchOp" + gUniqueSearchTermCounter;
    searchVal.id = "searchVal" + gUniqueSearchTermCounter;

    searchAttr.setAttribute("for", searchOp.id + "," + searchVal.id);
    searchOp.setAttribute("opfor", searchVal.id);

    var rowdata = [searchAttr, searchOp, searchVal,
                   [moreButton, lessButton] ];
    var searchrow = constructRow(rowdata);
    searchrow.id = "searchRow" + gUniqueSearchTermCounter;

    var searchTermObj = new searchTermContainer;
    searchTermObj.searchattribute = searchAttr;
    searchTermObj.searchoperator = searchOp;
    searchTermObj.searchvalue = searchVal;

    // now insert the new search term into our list of terms
    gSearchTerms.splice(index, 0, {obj:searchTermObj, scope:scope, searchTerm:searchTerm, initialized:false});

    var editFilter = null;
    try { editFilter = gFilter; } catch(e) { }

    var editMailView = null;
    try { editMailView = gMailView; } catch(e) { }

    if ((!editFilter && !editMailView) ||
        (editFilter && index == gTotalSearchTerms) ||
        (editMailView && index == gTotalSearchTerms))
      gLoading = false;

    // index is index of new row
    // gTotalSearchTerms has not been updated yet
    if (gLoading || index == gTotalSearchTerms) {
      gSearchTermList.appendChild(searchrow);
    }
    else {
      var currentItem = gSearchTermList.getItemAtIndex(index);
      gSearchTermList.insertBefore(searchrow, currentItem);
    }

    // If this row was added by user action, focus the value field.
    if (aUserAdded) {
      document.commandDispatcher.advanceFocusIntoSubtree(searchVal);
      searchrow.setAttribute("highlight", "true");
    }

    // bump our unique search term counter
    gUniqueSearchTermCounter++;
}

function initializeTermFromId(id)
{
  initializeTermFromIndex(getSearchRowIndexForElement(document.getElementById(id)));
}

function initializeTermFromIndex(index)
{
    var searchTermObj = gSearchTerms[index].obj;

    searchTermObj.searchScope = gSearchTerms[index].scope;
    // the search term will initialize the searchTerm element, including
    // .booleanAnd
    if (gSearchTerms[index].searchTerm)
        searchTermObj.searchTerm = gSearchTerms[index].searchTerm;
    // here, we don't have a searchTerm, so it's probably a new element -
    // we'll initialize the .booleanAnd from the existing setting in
    // the UI
    else
    {
      searchTermObj.booleanAnd = (gSearchBooleanRadiogroup.value == "and");
      if (index)
      {
        // If we weren't pre-initialized with a searchTerm then steal the
        // search attribute and operator from the previous row.
        searchTermObj.searchattribute.value =  gSearchTerms[index - 1].obj.searchattribute.value;
        searchTermObj.searchoperator.value = gSearchTerms[index - 1].obj.searchoperator.value;
      }
    }

    gSearchTerms[index].initialized = true;
}

/**
 * Creates a <listitem> using the array children as the children
 * of each listcell.
 * @param aChildren  An array of XUL elements to put into the listitem.
 *                   Each array member is put into a separate listcell.
 *                   If the member itself is an array of elements,
 *                   all of them are put into the same listcell.
 */
function constructRow(aChildren)
{
    let listitem = document.createElement("listitem");
    listitem.setAttribute("allowevents", "true");
    for (let i = 0; i < aChildren.length; i++) {
      let listcell = document.createElement("listcell");
      let child = aChildren[i];

      if (child instanceof Array) {
        for (let j = 0; j < child.length; j++)
          listcell.appendChild(child[j]);
      } else {
        child.setAttribute("flex", "1");
        listcell.appendChild(child);
      }
      listitem.appendChild(listcell);
    }
    return listitem;
}

function removeSearchRow(index)
{
    var searchTermObj = gSearchTerms[index].obj;
    if (!searchTermObj) {
        return;
    }

    // if it is an existing (but offscreen) term,
    // make sure it is initialized before we remove it.
    if (!gSearchTerms[index].searchTerm && !gSearchTerms[index].initialized)
        initializeTermFromIndex(index);

    // need to remove row from list, so walk upwards from the
    // searchattribute to find the first <listitem>
    var listitem = searchTermObj.searchattribute;

    while (listitem) {
        if (listitem.localName == "listitem") break;
        listitem = listitem.parentNode;
    }

    if (!listitem) {
        dump("Error: couldn't find parent listitem!\n");
        return;
    }


    if (searchTermObj.searchTerm) {
        gSearchRemovedTerms[gSearchRemovedTerms.length] = searchTermObj.searchTerm;
    } else {
        //dump("That wasn't real. ignoring \n");
    }

    listitem.remove();
    
    // now remove the item from our list of terms
    gSearchTerms.splice(index, 1); 
}

// save the search terms from the UI back to the actual search terms
// searchTerms: nsISupportsArray of terms
// termOwner:   object which can contain and create the terms
//              (will be unnecessary if we just make terms creatable
//               via XPCOM)
function saveSearchTerms(searchTerms, termOwner)
{
    var matchAll = gSearchBooleanRadiogroup.value == 'matchAll';
    var i;
    for (i = 0; i < gSearchRemovedTerms.length; i++)
        searchTerms.RemoveElement(gSearchRemovedTerms[i]);

    for (i = 0; i<gSearchTerms.length; i++) {
        try {
            gSearchTerms[i].obj.matchAll = matchAll;
            var searchTerm = gSearchTerms[i].obj.searchTerm;
            if (searchTerm)
                gSearchTerms[i].obj.save();
            else if (!gSearchTerms[i].initialized)
                // the term might be an offscreen one we haven't initialized yet
                searchTerm = gSearchTerms[i].searchTerm;
            else {
                // need to create a new searchTerm, and somehow save it to that
                searchTerm = termOwner.createTerm();
                gSearchTerms[i].obj.saveTo(searchTerm);
                // this might not be the right place for the term,
                // but we need to make the array longer anyway
                termOwner.appendTerm(searchTerm);
            }
            searchTerms.SetElementAt(i, searchTerm);
        } catch (ex) {
            dump("** Error saving element " + i + ": " + ex + "\n");
        }
    }
}

function onReset(event)
{
    while (gTotalSearchTerms>0)
        removeSearchRow(--gTotalSearchTerms);
    onMore(null);
}

function hideMatchAllItem()
{
    var allItems = document.getElementById('matchAllItem');
    if (allItems)
      allItems.hidden = true;
}
