/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* 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/. */

const {PluralForm} = ChromeUtils.import("resource://gre/modules/PluralForm.jsm");

var gSearchSession = null;
var gPreQuickSearchView = null;
var gSearchTimer = null;
var gViewSearchListener;
var gSearchBundle;
var gProgressMeter = null;
var gSearchInProgress = false;
var gClearButton = null;
var gDefaultSearchViewTerms = null;
var gQSViewIsDirty = false;
var gNumTotalMessages;
var gNumUnreadMessages;

function SetQSStatusText(aNumHits)
{
  var statusMsg;
  // if there are no hits, it means no matches were found in the search.
  if (aNumHits == 0)
  {
    statusMsg = gSearchBundle.getString("noMatchesFound");
  }
  else
  {
    statusMsg = PluralForm.get(aNumHits,
                               gSearchBundle.getString("matchesFound"));
    statusMsg = statusMsg.replace("#1", aNumHits);
  }
  statusFeedback.showStatusString(statusMsg);
}

// nsIMsgSearchNotify object
var gSearchNotificationListener =
{
    onSearchHit: function(header, folder)
    {
      gNumTotalMessages++;
      if (!header.isRead)
        gNumUnreadMessages++;
        // XXX todo
        // update status text?
    },

    onSearchDone: function(status)
    {
        SetQSStatusText(gDBView.QueryInterface(Ci.nsITreeView).rowCount)
        statusFeedback.showProgress(0);
        gProgressMeter.setAttribute("mode", "normal");
        gSearchInProgress = false;

        // ### TODO need to find out if there's quick search within a virtual folder.
        if (gCurrentVirtualFolderUri &&
            (!gSearchInput || gSearchInput.value == ""))
        {
          var vFolder = MailUtils.getFolderForURI(gCurrentVirtualFolderUri, false);
          var dbFolderInfo = vFolder.msgDatabase.dBFolderInfo;
          dbFolderInfo.numUnreadMessages = gNumUnreadMessages;
          dbFolderInfo.numMessages = gNumTotalMessages;
          vFolder.updateSummaryTotals(true); // force update from db.
          var msgdb = vFolder.msgDatabase;
          msgdb.Commit(Ci.nsMsgDBCommitType.kLargeCommit);
          // now that we have finished loading a virtual folder,
          // scroll to the correct message if there is at least one.
          if (vFolder.getTotalMessages(false) > 0)
            ScrollToMessageAfterFolderLoad(vFolder);
        }
    },

    onNewSearch: function()
    {
      statusFeedback.showProgress(0);
      statusFeedback.showStatusString(gSearchBundle.getString("searchingMessage"));
      gProgressMeter.setAttribute("mode", "undetermined");
      gSearchInProgress = true;
      gNumTotalMessages = 0;
      gNumUnreadMessages = 0;
    }
}

function getDocumentElements()
{
  gSearchBundle = document.getElementById("bundle_search");
  gProgressMeter = document.getElementById('statusbar-icon');
  gClearButton = document.getElementById('clearButton');
  GetSearchInput();
}

function addListeners()
{
  gViewSearchListener = gDBView.QueryInterface(Ci.nsIMsgSearchNotify);
  gSearchSession.registerListener(gViewSearchListener);
}

function removeListeners()
{
  gSearchSession.unregisterListener(gViewSearchListener);
}

function removeGlobalListeners()
{
  removeListeners();
  gSearchSession.unregisterListener(gSearchNotificationListener);
}

function initializeGlobalListeners()
{
  // Setup the javascript object as a listener on the search results
  gSearchSession.registerListener(gSearchNotificationListener);
}

function createQuickSearchView()
{
  //if not already in quick search view
  if (gDBView.viewType != nsMsgViewType.eShowQuickSearchResults)
  {
    var treeView = gDBView.QueryInterface(Ci.nsITreeView);  //clear selection
    if (treeView && treeView.selection)
      treeView.selection.clearSelection();
    gPreQuickSearchView = gDBView;
    if (gDBView.viewType == nsMsgViewType.eShowVirtualFolderResults)
    {
      // remove the view as a listener on the search results
      var saveViewSearchListener = gDBView.QueryInterface(Ci.nsIMsgSearchNotify);
      gSearchSession.unregisterListener(saveViewSearchListener);
    }
    CreateDBView(gDBView.msgFolder, (gXFVirtualFolderTerms) ? nsMsgViewType.eShowVirtualFolderResults : nsMsgViewType.eShowQuickSearchResults, gDBView.viewFlags, gDBView.sortType, gDBView.sortOrder);
  }
}

function initializeSearchBar()
{
   createQuickSearchView();
   if (!gSearchSession)
   {
     var searchSessionContractID = "@mozilla.org/messenger/searchSession;1";
     gSearchSession = Cc[searchSessionContractID].createInstance(Ci.nsIMsgSearchSession);
     initializeGlobalListeners();
   }
   else
   {
     if (gSearchInProgress)
     {
       onSearchStop();
       gSearchInProgress = false;
     }
     removeListeners();
   }
   addListeners();
}

function onEnterInSearchBar()
{
   if (!gSearchBundle)
     getDocumentElements();
   if (gSearchInput.value == "")
   {
    let viewType = gDBView && gDBView.viewType;
    if (viewType == nsMsgViewType.eShowQuickSearchResults ||
        viewType == nsMsgViewType.eShowVirtualFolderResults)
     {
       statusFeedback.showStatusString("");
       disableQuickSearchClearButton();

       viewDebug ("onEnterInSearchBar gDefaultSearchViewTerms = " + gDefaultSearchViewTerms + "gVirtualFolderTerms = "
        + gVirtualFolderTerms + "gXFVirtualFolderTerms = " + gXFVirtualFolderTerms + "\n");
       var addTerms = gDefaultSearchViewTerms || gVirtualFolderTerms || gXFVirtualFolderTerms;
       if (addTerms)
       {
           viewDebug ("addTerms = " + addTerms + " count = " + addTerms.length + "\n");
           initializeSearchBar();
           onSearch(addTerms);
       }
       else
        restorePreSearchView();
     }
     else if (gPreQuickSearchView && !gDefaultSearchViewTerms)// may be a quick search from a cross-folder virtual folder
      restorePreSearchView();

     gQSViewIsDirty = false;
     return;
   }

   initializeSearchBar();

   if (gClearButton)
    gClearButton.setAttribute("disabled", false); //coming into search enable clear button

   ClearThreadPaneSelection();
   ClearMessagePane();

   onSearch(null);
   gQSViewIsDirty = false;
}

function restorePreSearchView()
{
  var selectedHdr = null;
  //save selection
  try
  {
    selectedHdr = gDBView.hdrForFirstSelectedMessage;
  }
  catch (ex)
  {}

  //we might have to sort the view coming out of quick search
  var sortType = gDBView.sortType;
  var sortOrder = gDBView.sortOrder;
  var viewFlags = gDBView.viewFlags;
  var folder = gDBView.msgFolder;

  gDBView.close();
  gDBView = null;

  if (gPreQuickSearchView)
  {
    gDBView = gPreQuickSearchView;
    if (gDBView.viewType == nsMsgViewType.eShowVirtualFolderResults)
    {
      // readd the view as a listener on the search results
      var saveViewSearchListener = gDBView.QueryInterface(Ci.nsIMsgSearchNotify);
      if (gSearchSession)
        gSearchSession.registerListener(saveViewSearchListener);
    }
//    dump ("view type = " + gDBView.viewType + "\n");

    if (sortType != gDBView.sortType || sortOrder != gDBView.sortOrder)
    {
      gDBView.sort(sortType, sortOrder);
    }
    UpdateSortIndicators(sortType, sortOrder);

    gPreQuickSearchView = null;
  }
  else //create default view type
    CreateDBView(folder, nsMsgViewType.eShowAllThreads, viewFlags, sortType, sortOrder);

  RerootThreadPane();

  var scrolled = false;

  // now restore selection
  if (selectedHdr)
  {
    gDBView.selectMsgByKey(selectedHdr.messageKey);
    var treeView = gDBView.QueryInterface(Ci.nsITreeView);
    var selectedIndex = treeView.selection.currentIndex;
    if (selectedIndex >= 0)
    {
      // scroll
      EnsureRowInThreadTreeIsVisible(selectedIndex);
      scrolled = true;
    }
    else
      ClearMessagePane();
  }
  if (!scrolled)
    ScrollToMessageAfterFolderLoad(null);
}

function onSearch(aSearchTerms)
{
    viewDebug("in OnSearch, searchTerms = " + aSearchTerms + "\n");
    RerootThreadPane();

    if (aSearchTerms)
      createSearchTermsWithList(aSearchTerms);
    else
      createSearchTerms();

    gDBView.searchSession = gSearchSession;
    try
    {
      gSearchSession.search(msgWindow);
    }
    catch(ex)
    {
      dump("Search Exception\n");
    }
}

function createSearchTermsWithList(aTermsArray)
{
  var nsMsgSearchScope = Ci.nsMsgSearchScope;
  var nsMsgSearchAttrib = Ci.nsMsgSearchAttrib;
  var nsMsgSearchOp = Ci.nsMsgSearchOp;

  gSearchSession.searchTerms.clear();
  gSearchSession.clearScopes();

  var i;
  var selectedFolder = GetThreadPaneFolder();
  if (gXFVirtualFolderTerms)
  {
    var msgDatabase = selectedFolder.msgDatabase;
    if (msgDatabase)
    {
      var dbFolderInfo = msgDatabase.dBFolderInfo;
      var srchFolderUri = dbFolderInfo.getCharProperty("searchFolderUri");
      viewDebug("createSearchTermsWithList xf vf scope = " + srchFolderUri + "\n");
      var srchFolderUriArray = srchFolderUri.split('|');
      for (i in srchFolderUriArray)
      {
        let realFolder = MailUtils.getFolderForURI(srchFolderUriArray[i]);
        if (!realFolder.isServer)
          gSearchSession.addScopeTerm(nsMsgSearchScope.offlineMail, realFolder);
      }
    }
  }
  else
  {
    viewDebug ("in createSearchTermsWithList, adding scope term for selected folder\n");
    gSearchSession.addScopeTerm(nsMsgSearchScope.offlineMail, selectedFolder);
  }

  // Add each item in aTermsArray to the search session.
  for (let term of aTermsArray) {
    gSearchSession.appendTerm(term);
  }
}

function createSearchTerms()
{
  var nsMsgSearchScope = Ci.nsMsgSearchScope;
  var nsMsgSearchAttrib = Ci.nsMsgSearchAttrib;
  var nsMsgSearchOp = Ci.nsMsgSearchOp;

  // create an nsIMutableArray to store our search terms
  var searchTermsArray = Cc["@mozilla.org/array;1"]
                           .createInstance(Ci.nsIMutableArray);
  var selectedFolder = GetThreadPaneFolder();

  // implement | for QS
  // does this break if the user types "foo|bar" expecting to see subjects with that string?
  // I claim no, since "foo|bar" will be a hit for "foo" || "bar"
  // they just might get more false positives
  var termList = gSearchInput.value.split("|");
  for (var i = 0; i < termList.length; i ++)
  {
    // if the term is empty, skip it
    if (termList[i] == "")
      continue;

    // create, fill, and append the subject term
    var term = gSearchSession.createTerm();
    var value = term.value;
    value.str = termList[i];
    term.value = value;
    term.attrib = nsMsgSearchAttrib.Subject;
    term.op = nsMsgSearchOp.Contains;
    term.booleanAnd = false;
    searchTermsArray.appendElement(term);

    // create, fill, and append the AllAddresses term
    term = gSearchSession.createTerm();
    value = term.value;
    value.str = termList[i];
    term.value = value;
    term.attrib = nsMsgSearchAttrib.AllAddresses;
    term.op = nsMsgSearchOp.Contains;
    term.booleanAnd = false;
    searchTermsArray.appendElement(term);
  }

  // now append the default view or virtual folder criteria to the quick search
  // so we don't lose any default view information
  viewDebug("gDefaultSearchViewTerms = " + gDefaultSearchViewTerms + "gVirtualFolderTerms = " + gVirtualFolderTerms +
    "gXFVirtualFolderTerms = " + gXFVirtualFolderTerms + "\n");
  var defaultSearchTerms = (gDefaultSearchViewTerms || gVirtualFolderTerms || gXFVirtualFolderTerms);
  if (defaultSearchTerms)
  {
    for (let searchTerm of defaultSearchTerms)
    {
      searchTermsArray.appendElement(searchTerm);
    }
  }

  createSearchTermsWithList(searchTermsArray);

  // now that we've added the terms, clear out our input array
  searchTermsArray.clear();
}

function onSearchStop()
{
  gSearchSession.interruptSearch();
}

function onClearSearch()
{
  // Use the last focused element so that focus can be restored
  // if it does not exist, try and get the thread tree instead
  var focusedElement = gLastFocusedElement || GetThreadTree();
  Search("");
  focusedElement.focus();
}

function disableQuickSearchClearButton()
{
 if (gClearButton)
   gClearButton.setAttribute("disabled", true); //going out of search disable clear button
}

function ClearQSIfNecessary()
{
  GetSearchInput();

  if (gSearchInput.value == "")
    return;

  Search("");
}

function Search(str)
{
  GetSearchInput();

  if (str != gSearchInput.value)
  {
    gQSViewIsDirty = true;
    viewDebug("in Search(), setting gQSViewIsDirty true\n");
  }

  gSearchInput.value = str;  //on input does not get fired for some reason
  onEnterInSearchBar();
}