/* -*- Mode: Javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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/. */

"use strict";

Components.utils.import("resource:///modules/mailServices.js");
Components.utils.import("resource://gre/modules/Services.jsm");

var gImportType = null;
var gImportMsgsBundle;
var gFeedsBundle;
var gImportService = null;
var gSuccessStr = null;
var gErrorStr = null;
var gInputStr = null;
var gProgressInfo = null;
var gSelectedModuleName = null;
var gAddInterface = null;
var gNewFeedAcctCreated = false;

var Ci = Components.interfaces;
var nsISupportsString = Ci.nsISupportsString;

function OnLoadImportDialog()
{
  gImportMsgsBundle = document.getElementById("bundle_importMsgs");
  gFeedsBundle = document.getElementById("bundle_feeds");
  gImportService = Components.classes["@mozilla.org/import/import-service;1"]
                             .getService(Ci.nsIImportService);

  gProgressInfo = { };
  gProgressInfo.progressWindow = null;
  gProgressInfo.importInterface = null;
  gProgressInfo.mainWindow = window;
  gProgressInfo.intervalState = 0;
  gProgressInfo.importSuccess = false;
  gProgressInfo.importType = null;
  gProgressInfo.localFolderExists = false;

  gSuccessStr = Components.classes["@mozilla.org/supports-string;1"]
                          .createInstance(nsISupportsString);
  gErrorStr = Components.classes["@mozilla.org/supports-string;1"]
                        .createInstance(nsISupportsString);
  gInputStr = Components.classes["@mozilla.org/supports-string;1"]
                        .createInstance(nsISupportsString);

  // look in arguments[0] for parameters
  if (("arguments" in window) && window.arguments.length >= 1 &&
      ("importType" in window.arguments[0]) && window.arguments[0].importType)
  {
    // keep parameters in global for later
    gImportType = window.arguments[0].importType;
    gProgressInfo.importType = gImportType;
  }
  else
  {
    gImportType = "all";
    gProgressInfo.importType = "all";
  }

  SetUpImportType();

  // on startup, set the focus to the control element
  // for accessibility reasons.
  // if we used the wizardOverlay, we would get this for free.
  // see bug #101874
  document.getElementById("importFields").focus();
}


function SetUpImportType()
{
  // set dialog title
  document.getElementById("importFields").value = gImportType;

  // Mac migration not working right now, so disable it.
  if (Services.appinfo.OS == "Darwin")
  {
    document.getElementById("allRadio").setAttribute("disabled", "true");
    if (gImportType == "all")
      document.getElementById("importFields").value = "addressbook";
  }

  let descriptionDeck = document.getElementById("selectDescriptionDeck");
  descriptionDeck.selectedIndex = 0;
  if (gImportType == "feeds")
  {
    descriptionDeck.selectedIndex = 1;
    ListFeedAccounts();
  }
  else
    ListModules();
}


function SetDivText(id, text)
{
  var div = document.getElementById(id);

  if (div) {
    if (!div.hasChildNodes()) {
      var textNode = document.createTextNode(text);
      div.appendChild(textNode);
    }
    else if (div.childNodes.length == 1) {
      div.childNodes[0].nodeValue = text;
    }
  }
}

function CheckIfLocalFolderExists()
{
  try {
    if (MailServices.accounts.localFoldersServer)
      gProgressInfo.localFolderExists = true;
  }
  catch (ex) {
    gProgressInfo.localFolderExists = false;
  }
}

function ImportDialogOKButton()
{
  var listbox = document.getElementById("moduleList");
  var deck = document.getElementById("stateDeck");
  var header = document.getElementById("header");
  var progressMeterEl = document.getElementById("progressMeter");
  progressMeterEl.mode = "determined";
  var progressStatusEl = document.getElementById("progressStatus");
  var progressTitleEl = document.getElementById("progressTitle");

  // better not mess around with navigation at this point
  var nextButton = document.getElementById("forward");
  nextButton.setAttribute("disabled", "true");
  var backButton = document.getElementById("back");
  backButton.setAttribute("disabled", "true");

  if (listbox && (listbox.selectedCount == 1))
  {
    let module = "";
    let name = "";
    gImportType = document.getElementById("importFields").value;
    let index = listbox.selectedItem.getAttribute("list-index");
    if (index == -1)
      return false;
    if (gImportType == "feeds")
      module = "Feeds";
    else
    {
      module = gImportService.GetModule(gImportType, index);
      name = gImportService.GetModuleName(gImportType, index);
    }
    gSelectedModuleName = name;
    if (module)
    {
      // Fix for Bug 57839 & 85219
      // We use localFoldersServer(in nsIMsgAccountManager) to check if Local Folder exists.
      // We need to check localFoldersServer before importing "mail", "settings", or "filters".
      // Reason: We will create an account with an incoming server of type "none" after
      // importing "mail", so the localFoldersServer is valid even though the Local Folder
      // is not created.
      if (gImportType == "mail" || gImportType == "settings" || gImportType == "filters")
        CheckIfLocalFolderExists();

      let meterText = "";
      let error = {};
      switch(gImportType)
      {
        case "mail":
          if (ImportMail(module, gSuccessStr, gErrorStr))
          {
            // We think it was a success, either, we need to
            // wait for the import to finish
            // or we are done!
            if (gProgressInfo.importInterface == null) {
              ShowImportResults(true, 'Mail');
              return true;
            }
            else {
              meterText = gImportMsgsBundle.getFormattedString('MailProgressMeterText',
                                                               [ name ]);
              header.setAttribute("description", meterText);

              progressStatusEl.setAttribute("label", "");
              progressTitleEl.setAttribute("label", meterText);

              deck.selectedIndex = 2;
              gProgressInfo.progressWindow = window;
              gProgressInfo.intervalState = setInterval(ContinueImportCallback, 100);
              return true;
            }
          }
          else
          {
            ShowImportResults(false, 'Mail');
            // Re-enable the next button, as we are here, because the user cancelled the picking.
            // Enable next, so they can try again.
            nextButton.removeAttribute("disabled");
            // Also enable back button so that users can pick other import options.
            backButton.removeAttribute("disabled");
            return false;
          }
          break;

        case "feeds":
          if (ImportFeeds())
          {
            // Successful completion of pre processing and launch of async import.
            meterText = document.getElementById("description").textContent;
            header.setAttribute("description", meterText);

            progressStatusEl.setAttribute("label", "");
            progressTitleEl.setAttribute("label", meterText);
            progressMeterEl.mode = "undetermined";

            deck.selectedIndex = 2;
            return true;
          }
          else
          {
            // Re-enable the next button, as we are here, because the user cancelled the picking.
            // Enable next, so they can try again.
            nextButton.removeAttribute("disabled");
            // Also enable back button so that users can pick other import options.
            backButton.removeAttribute("disabled");
            return false;
          }
          break;

        case "addressbook":
          if (ImportAddress(module, gSuccessStr, gErrorStr)) {
            // We think it was a success, either, we need to
            // wait for the import to finish
            // or we are done!
            if (gProgressInfo.importInterface == null) {
              ShowImportResults(true, 'Address');
              return true;
            }
            else {
              meterText = gImportMsgsBundle.getFormattedString('AddrProgressMeterText',
                                                               [ name ]);
              header.setAttribute("description", meterText);

              progressStatusEl.setAttribute("label", "");
              progressTitleEl.setAttribute("label", meterText);

              deck.selectedIndex = 2;
              gProgressInfo.progressWindow = window;
              gProgressInfo.intervalState = setInterval(ContinueImportCallback, 100);

              return true;
            }
          }
          else
          {
            ShowImportResults(false, 'Address');
            // Re-enable the next button, as we are here, because the user cancelled the picking.
            // Enable next, so they can try again.
            nextButton.removeAttribute("disabled");
            // Also enable back button so that users can pick other import options.
            backButton.removeAttribute("disabled");
            return false;
          }
          break;

        case "settings":
          error.value = null;
          let newAccount = {};
          if (!ImportSettings(module, newAccount, error))
          {
            if (error.value)
              ShowImportResultsRaw(gImportMsgsBundle.getString("ImportSettingsFailed"),
                                   null, false);
            // Re-enable the next button, as we are here, because the user cancelled the picking.
            // Enable next, so they can try again.
            nextButton.removeAttribute("disabled");
            // Also enable back button so that users can pick other import options.
            backButton.removeAttribute("disabled");
            return false;
          }
          else
            ShowImportResultsRaw(
             gImportMsgsBundle.getFormattedString("ImportSettingsSuccess", [ name ]),
             null, true);
          break;

        case "filters":
          error.value = null;
          if (!ImportFilters(module, error))
          {
            if (error.value)
              ShowImportResultsRaw(
                gImportMsgsBundle.getFormattedString("ImportFiltersFailed", [ name ]),
                error.value, false);
            // Re-enable the next button, as we are here, because the user cancelled the picking.
            // Enable next, so they can try again.
            nextButton.removeAttribute("disabled");
            // Also enable back button so that users can pick other import options.
            backButton.removeAttribute("disabled");
            return false;
          }
          else
          {
            if (error.value)
              ShowImportResultsRaw(
                gImportMsgsBundle.getFormattedString('ImportFiltersPartial', [ name ]),
                error.value, true);
            else
              ShowImportResultsRaw(
                gImportMsgsBundle.getFormattedString('ImportFiltersSuccess', [ name ]),
                null, true);
          }
          break;
      }
    }
  }

  return true;
}

function SetStatusText(val)
{
  var progressStatus = document.getElementById("progressStatus");
  progressStatus.setAttribute("label", val);
}

function SetProgress(val)
{
  var progressMeter = document.getElementById("progressMeter");
  progressMeter.value = val;
}

function ContinueImportCallback()
{
  gProgressInfo.mainWindow.ContinueImport(gProgressInfo);
}

function ImportSelectionChanged()
{
  let listbox = document.getElementById('moduleList');
  let acctNameBox = document.getElementById('acctName-box');
  if (listbox && (listbox.selectedCount == 1))
  {
    let index = listbox.selectedItem.getAttribute("list-index");
    if (index == -1)
      return;
    acctNameBox.setAttribute('style', 'visibility: hidden;');
    if (gImportType == "feeds")
    {
      if (index == 0)
      {
        SetDivText('description', gFeedsBundle.getString('ImportFeedsNewAccount'));
        let defaultName = gFeedsBundle.getString("feeds-accountname");
        document.getElementById("acctName").value = defaultName;
        acctNameBox.removeAttribute('style');
      }
      else
        SetDivText('description', gFeedsBundle.getString('ImportFeedsExistingAccount'));
    }
    else
      SetDivText("description", gImportService.GetModuleDescription(gImportType, index));
  }
}

function CompareImportModuleName(a, b)
{
  if (a.name > b.name)
    return 1;
  if (a.name < b.name)
    return -1;
  return 0;
}

function ListModules() {
  if (gImportService == null)
    return;

  var body = document.getElementById("moduleList");
  while (body.hasChildNodes()) {
    body.lastChild.remove();
  }

  var count = gImportService.GetModuleCount(gImportType);
  var i;

  var moduleArray = new Array(count);
  for (i = 0; i < count; i++) {
    moduleArray[i] = { name: gImportService.GetModuleName(gImportType, i), index: i };
  }

  // sort the array of modules by name, so that they'll show up in the right order
  moduleArray.sort(CompareImportModuleName);

  for (i = 0; i < count; i++) {
    AddModuleToList(moduleArray[i].name, moduleArray[i].index);
  }
}

function AddModuleToList(moduleName, index)
{
  var body = document.getElementById("moduleList");

  var item = document.createElement('listitem');
  item.setAttribute('label', moduleName);

  // Temporarily skip Outlook Import which are busted (Bug 1175055).
  if (moduleName == "Outlook") {
    item.setAttribute('list-index', -1);
    item.setAttribute('disabled', true);
    item.setAttribute('tooltiptext', "Currently disabled due to bug 1175055");
  } else {
    item.setAttribute('list-index', index);
  }
  body.appendChild(item);
}

function ListFeedAccounts() {
  let body = document.getElementById("moduleList");
  while (body.hasChildNodes())
    body.lastChild.remove();

  // Add item to allow for new account creation.
  let item = document.createElement("listitem");
  item.setAttribute("label", gFeedsBundle.getString('ImportFeedsCreateNewListItem'));
  item.setAttribute("list-index", 0);
  body.appendChild(item);

  let index = 0;
  let feedRootFolders = FeedUtils.getAllRssServerRootFolders();

  feedRootFolders.forEach(function(rootFolder) {
    item = document.createElement("listitem");
    item.setAttribute("label", rootFolder.prettyName);
    item.setAttribute("list-index", ++index);
    item.server = rootFolder.server;
    body.appendChild(item);
  }, this);

  if (index)
    // If there is an existing feed account, select the first one.
    body.selectedIndex = 1;
}

function ContinueImport(info) {
  var isMail = info.importType == 'mail';
  var clear = true;
  var deck;
  var pcnt;

  if (info.importInterface) {
    if (!info.importInterface.ContinueImport()) {
      info.importSuccess = false;
      clearInterval(info.intervalState);
      if (info.progressWindow != null) {
        deck = document.getElementById("stateDeck");
        deck.selectedIndex = 3;
        info.progressWindow = null;
      }

      ShowImportResults(false, isMail ? 'Mail' : 'Address');
    }
    else if ((pcnt = info.importInterface.GetProgress()) < 100) {
      clear = false;
      if (info.progressWindow != null) {
        if (pcnt < 5)
          pcnt = 5;
        SetProgress(pcnt);
        if (isMail) {
          let mailName = info.importInterface.GetData("currentMailbox");
          if (mailName) {
            mailName = mailName.QueryInterface(Ci.nsISupportsString);
            if (mailName)
              SetStatusText(mailName.data);
          }
        }
      }
    }
    else {
      dump("*** WARNING! sometimes this shows results too early. \n");
      dump("    something screwy here. this used to work fine.\n");
      clearInterval(info.intervalState);
      info.importSuccess = true;
      if (info.progressWindow) {
        deck = document.getElementById("stateDeck");
        deck.selectedIndex = 3;
        info.progressWindow = null;
      }

      ShowImportResults(true, isMail ? 'Mail' : 'Address');
    }
  }
  if (clear) {
    info.intervalState = null;
    info.importInterface = null;
  }
}


function ShowResults(doesWantProgress, result)
{
  if (result)
  {
    if (doesWantProgress)
    {
      let deck = document.getElementById("stateDeck");
      let header = document.getElementById("header");
      let progressStatusEl = document.getElementById("progressStatus");
      let progressTitleEl = document.getElementById("progressTitle");

      let meterText = gImportMsgsBundle.getFormattedString("AddrProgressMeterText", [ name ]);
      header.setAttribute("description", meterText);

      progressStatusEl.setAttribute("label", "");
      progressTitleEl.setAttribute("label", meterText);

      deck.selectedIndex = 2;
      gProgressInfo.progressWindow = window;
      gProgressInfo.intervalState = setInterval(ContinueImportCallback, 100);
    }
    else
    {
      ShowImportResults(true, 'Address');
    }
  }
  else
  {
    ShowImportResults(false, 'Address');
  }

  return true;
}

function ShowImportResults(good, module)
{
  // String keys for ImportSettingsSuccess, ImportSettingsFailed,
  // ImportMailSuccess, ImportMailFailed, ImportAddressSuccess,
  // ImportAddressFailed, ImportFiltersSuccess, and ImportFiltersFailed.
  var modSuccess = 'Import' + module + 'Success';
  var modFailed = 'Import' + module + 'Failed';

  // The callers seem to set 'good' to true even if there's something
  // in the error log. So we should only make it a success case if
  // error log/str is empty.
  var results, title;
  var moduleName = gSelectedModuleName ? gSelectedModuleName : "";
  if (good && !gErrorStr.data) {
    title = gImportMsgsBundle.getFormattedString(modSuccess, [ moduleName ]);
    results = gSuccessStr.data;
  }
  else if (gErrorStr.data) {
    title = gImportMsgsBundle.getFormattedString(modFailed, [ moduleName ]);
    results = gErrorStr.data;
  }

  if (results && title)
    ShowImportResultsRaw(title, results, good);
}

function ShowImportResultsRaw(title, results, good)
{
  SetDivText("status", title);
  var header = document.getElementById("header");
  header.setAttribute("description", title);
  dump("*** results = " + results + "\n");
  attachStrings("results", results);
  var deck = document.getElementById("stateDeck");
  deck.selectedIndex = 3;
  var nextButton = document.getElementById("forward");
  nextButton.label = nextButton.getAttribute("finishedval");
  nextButton.removeAttribute("disabled");
  var cancelButton = document.getElementById("cancel");
  cancelButton.setAttribute("disabled", "true");
  var backButton = document.getElementById("back");
  backButton.setAttribute("disabled", "true");

  // If the Local Folder doesn't exist, create it after successfully
  // importing "mail" and "settings"
  var checkLocalFolder = (gProgressInfo.importType == "mail" ||
                          gProgressInfo.importType == "settings");
  if (good && checkLocalFolder && !gProgressInfo.localFolderExists) {
    MailServices.accounts.createLocalMailAccount();
  }
}

function attachStrings(aNode, aString)
{
  var attachNode = document.getElementById(aNode);
  if (!aString) {
    attachNode.parentNode.setAttribute("hidden", "true");
    return;
  }
  var strings = aString.split("\n");
  for (let string of strings) {
    if (string) {
      let currNode = document.createTextNode(string);
      attachNode.appendChild(currNode);
      let br = document.createElementNS("http://www.w3.org/1999/xhtml", 'br');
      attachNode.appendChild(br);
    }
  }
}

/*
  Import Settings from a specific module, returns false if it failed
  and true if successful.  A "local mail" account is returned in newAccount.
  This is only useful in upgrading - import the settings first, then
  import mail into the account returned from ImportSettings, then
  import address books.
  An error string is returned as error.value
*/
function ImportSettings(module, newAccount, error) {
  var setIntf = module.GetImportInterface("settings");
  if (!(setIntf instanceof Ci.nsIImportSettings)) {
    error.value = gImportMsgsBundle.getString('ImportSettingsBadModule');
    return false;
  }

  // determine if we can auto find the settings or if we need to ask the user
  var location = {};
  var description = {};
  var result = setIntf.AutoLocate(description, location);
  if (!result) {
    // In this case, we couldn't find the settings
    if (location.value != null) {
      // Settings were not found, however, they are specified
      // in a file, so ask the user for the settings file.
      let filePicker = Components.classes["@mozilla.org/filepicker;1"].createInstance();
      if (filePicker instanceof Ci.nsIFilePicker) {
          let file = null;
          try {
            filePicker.init(window,
                            gImportMsgsBundle.getString("ImportSelectSettings"),
                            filePicker.modeOpen);
            filePicker.appendFilters(filePicker.filterAll);
            filePicker.show();
            file = filePicker.file;
          }
          catch(ex) {
            file = null;
            error.value = null;
            return false;
          }
          if (file != null) {
            setIntf.SetLocation(file);
          }
          else {
            error.value = null;
            return false;
          }
      }
      else {
        error.value = gImportMsgsBundle.getString('ImportSettingsNotFound');
        return false;
      }
    }
    else {
      error.value = gImportMsgsBundle.getString('ImportSettingsNotFound');
      return false;
    }
  }

  // interesting, we need to return the account that new
  // mail should be imported into?
  // that's really only useful for "Upgrade"
  result = setIntf.Import(newAccount);
  if (!result) {
    error.value = gImportMsgsBundle.getString('ImportSettingsFailed');
  }
  return result;
}

function ImportMail(module, success, error) {
  if (gProgressInfo.importInterface || gProgressInfo.intervalState) {
    error.data = gImportMsgsBundle.getString('ImportAlreadyInProgress');
    return false;
  }

  gProgressInfo.importSuccess = false;

  var mailInterface = module.GetImportInterface("mail");
  if (!(mailInterface instanceof Ci.nsIImportGeneric)) {
    error.data = gImportMsgsBundle.getString('ImportMailBadModule');
    return false;
  }

  var loc = mailInterface.GetData("mailLocation");

  if (loc == null) {
    // No location found, check to see if we can ask the user.
    if (mailInterface.GetStatus("canUserSetLocation") != 0) {
      let filePicker = Components.classes["@mozilla.org/filepicker;1"].createInstance();
      if (filePicker instanceof Ci.nsIFilePicker) {
          try {
            filePicker.init(window,
                            gImportMsgsBundle.getString("ImportSelectMailDir"),
                            filePicker.modeGetFolder);
            filePicker.appendFilters(filePicker.filterAll);
            filePicker.show();
            if (filePicker.file && (filePicker.file.path.length > 0))
              mailInterface.SetData("mailLocation", filePicker.file);
            else
              return false;
          } catch(ex) {
            // don't show an error when we return!
            return false;
          }
      }
      else {
        error.data = gImportMsgsBundle.getString('ImportMailNotFound');
        return false;
      }
    }
    else {
      error.data = gImportMsgsBundle.getString('ImportMailNotFound');
      return false;
    }
  }

  if (mailInterface.WantsProgress()) {
   if (mailInterface.BeginImport(success, error)) {
      gProgressInfo.importInterface = mailInterface;
      // intervalState = setInterval(ContinueImport, 100);
      return true;
    }
    else
      return false;
  }
  else
    return mailInterface.BeginImport(success, error);
}


// The address import!  A little more complicated than the mail import
// due to field maps...
function ImportAddress(module, success, error) {
  if (gProgressInfo.importInterface || gProgressInfo.intervalState) {
    error.data = gImportMsgsBundle.getString('ImportAlreadyInProgress');
    return false;
  }

  gProgressInfo.importSuccess = false;

  gAddInterface = module.GetImportInterface("addressbook");
  if (!(gAddInterface instanceof Ci.nsIImportGeneric)) {
    error.data = gImportMsgsBundle.getString('ImportAddressBadModule');
    return false;
  }

  var loc = gAddInterface.GetStatus("autoFind");
  if (loc == 0) {
    loc = gAddInterface.GetData("addressLocation");
    if ((loc instanceof Ci.nsIFile) && !loc.exists)
      loc = null;
  }

  if (loc == null) {
    // Couldn't find the address book, see if we can
    // as the user for the location or not?
    if (gAddInterface.GetStatus("canUserSetLocation") == 0) {
      // an autofind address book that could not be found!
      error.data = gImportMsgsBundle.getString('ImportAddressNotFound');
      return false;
    }

    let filePicker = Components.classes["@mozilla.org/filepicker;1"].createInstance();
    if (!(filePicker instanceof Ci.nsIFilePicker)) {
      error.data = gImportMsgsBundle.getString('ImportAddressNotFound');
      return false;
    }

    // The address book location was not found.
    // Determine if we need to ask for a directory
    // or a single file.
    let file = null;
    let fileIsDirectory = false;
    if (gAddInterface.GetStatus("supportsMultiple") != 0) {
      // ask for dir
      try {
        filePicker.init(window,
                        gImportMsgsBundle.getString("ImportSelectAddrDir"),
                        filePicker.modeGetFolder);
        filePicker.appendFilters(filePicker.filterAll);
        filePicker.show();
        if (filePicker.file && (filePicker.file.path.length > 0)) {
          file = filePicker.file;
          fileIsDirectory = true;
        }
        else {
          file = null;
        }
      } catch(ex) {
        file = null;
      }
    }
    else {
      // ask for file
      try {
        filePicker.init(window,
                        gImportMsgsBundle.getString("ImportSelectAddrFile"),
                        filePicker.modeOpen);
        let addressbookBundle = document.getElementById("bundle_addressbook");
        if (gSelectedModuleName ==
            document.getElementById("bundle_vcardImportMsgs")
                    .getString("vCardImportName")) {
          filePicker.appendFilter(addressbookBundle.getString('VCFFiles'), "*.vcf");
        } else {
          filePicker.appendFilter(addressbookBundle.getString('LDIFFiles'), "*.ldi; *.ldif");
          filePicker.appendFilter(addressbookBundle.getString('CSVFiles'), "*.csv");
          filePicker.appendFilter(addressbookBundle.getString('TABFiles'), "*.tab; *.txt");
          filePicker.appendFilters(filePicker.filterAll);
        }

        if (filePicker.show() == filePicker.returnCancel)
          return false;

        if (filePicker.file && (filePicker.file.path.length > 0))
          file = filePicker.file;
        else
          file = null;
      } catch(ex) {
        dump("ImportAddress(): failure when picking a file to import:  " + ex + "\n");
        file = null;
      }
    }

    if (file == null) {
      return false;
    }

    if (!fileIsDirectory && (file.fileSize == 0)) {
      let errorText = gImportMsgsBundle.getFormattedString("ImportEmptyAddressBook",
                                                           [filePicker.file.leafName]);

      Services.prompt.alert(window, document.title, errorText);
      return false;
    }
    gAddInterface.SetData("addressLocation", file);
  }

  var map = gAddInterface.GetData("fieldMap");
  if (map instanceof Ci.nsIImportFieldMap) {
    let result = {};
    result.ok = false;
    window.openDialog(
      "chrome://messenger/content/fieldMapImport.xul",
      "",
      "chrome,modal,titlebar",
      { fieldMap: map,
        addInterface: gAddInterface,
        result: result });

    if (!result.ok)
      return false;
  }

  if (gAddInterface.WantsProgress()) {
    if (gAddInterface.BeginImport(success, error)) {
      gProgressInfo.importInterface = gAddInterface;
      // intervalState = setInterval(ContinueImport, 100);
      return true;
    }
    return false;
  }

  return gAddInterface.BeginImport(success, error);
}

/*
  Import filters from a specific module.
  Returns false if it failed and true if it succeeded.
  An error string is returned as error.value.
*/
function ImportFilters(module, error)
{
  if (gProgressInfo.importInterface || gProgressInfo.intervalState) {
    error.data = gImportMsgsBundle.getString('ImportAlreadyInProgress');
    return false;
  }

  gProgressInfo.importSuccess = false;

  var filtersInterface = module.GetImportInterface("filters");
  if (!(filtersInterface instanceof Ci.nsIImportFilters)) {
    error.data = gImportMsgsBundle.getString('ImportFiltersBadModule');
    return false;
  }

  return filtersInterface.Import(error);
}

/*
  Import feeds.
*/
function ImportFeeds()
{
  // Get file to open from filepicker.
  let openFile = FeedSubscriptions.opmlPickOpenFile();
  if (!openFile)
    return false;

  let acctName;
  let acctNewExist = gFeedsBundle.getString("ImportFeedsExisting");
  let fileName = openFile.path;
  let server = document.getElementById("moduleList").selectedItem.server;
  gNewFeedAcctCreated = false;

  if (!server)
  {
    // Create a new Feeds account.
    acctName = document.getElementById("acctName").value;
    server = FeedUtils.createRssAccount(acctName).incomingServer;
    acctNewExist = gFeedsBundle.getString("ImportFeedsNew");
    gNewFeedAcctCreated = true;
  }

  acctName = server.rootFolder.prettyName;

  let callback = function(aStatusReport, aLastFolder , aFeedWin)
  {
    let message = gFeedsBundle.getFormattedString("ImportFeedsDone",
                                                  [fileName, acctNewExist, acctName]);
    ShowImportResultsRaw(message + "  " + aStatusReport, null, true);
    document.getElementById("back").removeAttribute("disabled");

    let subscriptionsWindow = Services.wm.getMostRecentWindow("Mail:News-BlogSubscriptions");
    if (subscriptionsWindow)
    {
      let feedWin = subscriptionsWindow.FeedSubscriptions;
      if (aLastFolder)
        feedWin.FolderListener.folderAdded(aLastFolder);
      feedWin.mActionMode = null;
      feedWin.updateButtons(feedWin.mView.currentItem);
      feedWin.clearStatusInfo();
      feedWin.updateStatusItem("statusText", aStatusReport);
    }
  }

  if (!FeedSubscriptions.importOPMLFile(openFile, server, callback))
    return false;

  let subscriptionsWindow = Services.wm.getMostRecentWindow("Mail:News-BlogSubscriptions");
  if (subscriptionsWindow)
  {
    let feedWin = subscriptionsWindow.FeedSubscriptions;
    feedWin.mActionMode = feedWin.kImportingOPML;
    feedWin.updateButtons(null);
    let statusReport = gFeedsBundle.getString("subscribe-loading");
    feedWin.updateStatusItem("statusText", statusReport);
    feedWin.updateStatusItem("progressMeter", "?");
  }

  return true;
}

function SwitchType(newType)
{
  if (gImportType == newType)
    return;

  gImportType = newType;
  gProgressInfo.importType = newType;

  SetUpImportType();

  SetDivText('description', "");
}


function next()
{
  var deck = document.getElementById("stateDeck");
  switch (deck.selectedIndex) {
  case "0":
    let backButton = document.getElementById("back");
    backButton.removeAttribute("disabled");
    let radioGroup = document.getElementById("importFields");

    if (radioGroup.value == "all")
    {
      let args = { closeMigration: true };
      let SEAMONKEY_ID = "{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}";
      if (Services.appinfo.ID == SEAMONKEY_ID) {
        window.openDialog("chrome://communicator/content/migration/migration.xul",
                          "", "chrome,dialog,modal,centerscreen");
      } else {
        // Running as Thunderbird or its clone.
        window.openDialog("chrome://messenger/content/migration/migration.xul",
                          "", "chrome,dialog,modal,centerscreen", null, null, null, args);
      }
      if (args.closeMigration)
        close();
    }
    else
    {
      SwitchType(radioGroup.value);
      deck.selectedIndex = 1;
      document.getElementById("modulesFound").selectedIndex =
        (document.getElementById("moduleList").itemCount > 0) ? 0 : 1;
      SelectFirstItem();
      enableAdvance();
    }
    break;
  case "1":
    ImportDialogOKButton();
    break;
  case "3":
    close();
    break;
  }
}

function SelectFirstItem()
{
  var listbox = document.getElementById("moduleList");
  if ((listbox.selectedIndex == -1) && (listbox.itemCount > 0))
    listbox.selectedIndex = 0;
  ImportSelectionChanged();
}

function enableAdvance()
{
  var listbox = document.getElementById("moduleList");
  var nextButton = document.getElementById("forward");
  if (listbox.selectedCount > 0)
    nextButton.removeAttribute("disabled");
  else
    nextButton.setAttribute("disabled", "true");
}

function back()
{
  var deck = document.getElementById("stateDeck");
  var backButton = document.getElementById("back");
  var nextButton = document.getElementById("forward");
  switch (deck.selectedIndex) {
  case "1":
    backButton.setAttribute("disabled", "true");
    nextButton.label = nextButton.getAttribute("nextval");
    nextButton.removeAttribute("disabled");
    deck.selectedIndex = 0;
    break;
  case "3":
    // Clear out the results box.
    let results = document.getElementById("results");
    while (results.hasChildNodes())
      results.lastChild.remove();

    // Reset the next button.
    nextButton.label = nextButton.getAttribute("nextval");
    nextButton.removeAttribute("disabled");

    // Enable the cancel button again.
    document.getElementById("cancel").removeAttribute("disabled");

    // If a new Feed account has been created, rebuild the list.
    if (gNewFeedAcctCreated)
      ListFeedAccounts();

    // Now go back to the second page.
    deck.selectedIndex = 1;
    break;
  }
}