var contactSelectorAction = 'mailer-contacts';
var signatureLength = 0;

var attachmentCount = 0;
var MailEditor = {
 addressBook: null,
 currentField: null,
 selectedIndex: -1,
 delay: 500,
 delayedSearch: false
};

function onContactAdd() {
  var selector = null;
  var selectorURL = '?popup=YES&selectorId=mailer-contacts';
 
  if (MailEditor.addressBook && MailEditor.addressBook.open && !MailEditor.addressBook.closed)
    MailEditor.addressBook.focus();
  else {
    var urlstr = ApplicationBaseURL 
      + "../Contacts/"
      + contactSelectorAction + selectorURL;
    MailEditor.addressBook = window.open(urlstr, "_blank",
					 "width=640,height=400,resizable=1,scrollbars=0");
    MailEditor.addressBook.selector = selector;
    MailEditor.addressBook.opener = self;
    MailEditor.addressBook.focus();
  }
  
  return false;
}

function addContact(tag, fullContactName, contactId, contactName, contactEmail) {
  if (!mailIsRecipient(contactEmail)) {
    var neededOptionValue = 0;
    if (tag == "cc")
      neededOptionValue = 1;
    else if (tag == "bcc")
      neededOptionValue = 2;

    var stop = false;
    var counter = 0;
    var currentRow = $('row_' + counter);
    while (currentRow && !stop) {
      var currentValue = $(currentRow.childNodesWithTag("td")[1]).childNodesWithTag("input")[0].value;
      if (currentValue == neededOptionValue) {
        stop = true;
        insertContact($("addr_" + counter), contactName, contactEmail);
      }
      counter++;
      currentRow = $('row_' + counter);
    }

    if (!stop) {
      fancyAddRow(false, "");
      $($("row_" + counter).childNodesWithTag("td")[0]).childNodesWithTag("select")[0].value
        = neededOptionValue;
      insertContact($("addr_" + counter), contactName, contactEmail);
      onWindowResize(null);
    }
  }
}

function mailIsRecipient(mailto) {
  var isRecipient = false;

  var counter = 0;
  var currentRow = $('row_' + counter);

  var email = extractEmailAddress(mailto).toUpperCase();

  while (currentRow && !isRecipient) {
    var currentValue = $("addr_"+counter).value.toUpperCase();
    if (currentValue.indexOf(email) > -1)
      isRecipient = true;
    else
      {
        counter++;
        currentRow = $('row_' + counter);
      }
  }

  return isRecipient;
}

function insertContact(inputNode, contactName, contactEmail) {
  var value = '' + inputNode.value;

  var newContact = contactName;
  if (newContact.length > 0)
    newContact += ' <' + contactEmail + '>';
  else
    newContact = contactEmail;

  if (value.length > 0)
    value += ", ";
  value += newContact;

  inputNode.value = value;
}

function toggleAttachments() {
  var div = $("attachmentsArea");
  var style = "" + div.getStyle("display");
  if (style.length)
    div.setStyle({ display: "" });
  else
    div.setStyle({ display: "block" });

  return false;
}

function updateInlineAttachmentList(sender, attachments) {
  var count = 0;

  var div = $("attachmentsArea");
  if (attachments)
    count = attachments.length;

  if (count) {
    var text  = "";
    for (var i = 0; i < count; i++) {
      text = text + attachments[i];
      text = text + '<br />';
    }

    var e = $('compose_attachments_list');
    e.innerHTML = text;
    var style = "" + div.getStyle("display");
    if (!style.length)
    	div.setStyle({display: "block"});
  }
  else
    div.setStyle({display: ""});
}
/* mail editor */

function validateEditorInput(sender) {
  var errortext = "";
  var field;
   
  field = document.pageform.subject;
  if (field.value == "")
    errortext = errortext + labels["error_missingsubject"] + "\n";

  if (!hasRecipients())
    errortext = errortext + labels["error_missingrecipients"] + "\n";
   
  if (errortext.length > 0) {
    alert(labels["error_validationfailed"] + ":\n" + errortext);
    return false;
  }

  return true;
}

function clickedEditorSend(sender) {
  if (!validateEditorInput(sender))
    return false;

  var input = currentAttachmentInput();
  if (input)
    input.parentNode.removeChild(input);

  var toolbar = document.getElementById("toolbar");
  if (!document.busyAnim)
    document.busyAnim = startAnimation(toolbar);
  
  var lastRow = $("lastRow");
  lastRow.down("select").name = "popup_last";
  
  window.shouldPreserve = true;
  document.pageform.action = "send";
  document.pageform.submit();
  
  return false;
}

function currentAttachmentInput() {
  var input = null;

  var inputs = $("attachmentsArea").getElementsByTagName("input");
  var i = 0;
  while (!input && i < inputs.length)
    if ($(inputs[i]).hasClassName("currentAttachment"))
      input = inputs[i];
    else
      i++;

  return input;
}

function clickedEditorAttach(sender) {
  var input = currentAttachmentInput();
  if (!input) {
    var area = $("attachmentsArea");

    if (!area.style.display) {
      area.setStyle({ display: "block" });
      onWindowResize(null);
    }
    var inputs = area.getElementsByTagName("input");
    var attachmentName = "attachment" + attachmentCount;
    var newAttachment = createElement("input", attachmentName,
				      "currentAttachment", null,
				      { type: "file",
					name: attachmentName },
				      area);
    attachmentCount++;
    newAttachment.observe("change",
		  onAttachmentChange.bindAsEventListener(newAttachment));
  }

  return false;
}

function onAddAttachment() {
  return clickedEditorAttach(null);
}

function onAttachmentChange(event) {
  if (this.value == "")
    this.parentNode.removeChild(this);
  else {
    this.addClassName("attachment");
    this.removeClassName("currentAttachment");
    var list = $("attachments");
    createAttachment(this, list);
    clickedEditorAttach(null)
  }
}

function createAttachment(node, list) {
  var attachment = createElement("li", null, null, { node: node }, null, list);
  createElement("img", null, null, { src: ResourcesURL + "/attachment.gif" },
		null, attachment);
  attachment.observe("click", onRowClick);

  var filename = node.value;
  var separator;
  if (navigator.appVersion.indexOf("Windows") > -1)
    separator = "\\";
  else
    separator = "/";
  var fileArray = filename.split(separator);
  var attachmentName = document.createTextNode(fileArray[fileArray.length-1]);
  attachment.appendChild(attachmentName);
}

function clickedEditorSave(sender) {
  var input = currentAttachmentInput();
  if (input)
    input.parentNode.removeChild(input);

  var lastRow = $("lastRow");
  lastRow.down("select").name = "popup_last";

  window.shouldPreserve = true;
  document.pageform.action = "save";
  document.pageform.submit();

  if (window.opener && window.open && !window.closed)
    window.opener.refreshFolderByType('draft');
  return false;
}

function onTextFocus() {
  var input = currentAttachmentInput();
  if (input)
    input.parentNode.removeChild(input);
}

function onTextFirstFocus() {
  var content = this.getValue();
  if (content.lastIndexOf("--") == 0) {
    this.insertBefore(document.createTextNode("\r"),
		      this.lastChild);
  }
  if (signatureLength > 0) {
    var length = this.getValue().length - signatureLength - 2;
    this.setCaretTo(length);
  }
  Event.stopObserving(this, "focus", onTextFirstFocus);
}

function onTextContextMenu(event) {
  event.returnValue = true;
  event.cancelBubble = true;
}

function onTextMouseDown(event) {
  if (event.button == 0) {
    event.returnValue = false;
    event.cancelBubble = false;
  }
}

/* address completion */

function onContactKeydown(event) {
  if (event.ctrlKey || event.metaKey) {
    this.focussed = true;
    return;
  }
  if (event.keyCode == 9) { // Tab
    if (this.confirmedValue)
      this.value = this.confirmedValue;
    if (document.currentPopupMenu)
      hideMenu(document.currentPopupMenu);
  }
  else if (event.keyCode == 0
	|| event.keyCode == 8 // Backspace
        || event.keyCode == 32  // Space
        || event.keyCode > 47) {
      this.confirmedValue = null;
      MailEditor.selectedIndex = -1;
      MailEditor.currentField = this;
      if (this.value.length > 0 && !MailEditor.delayedSearch) {
	MailEditor.delayedSearch = true;
	setTimeout("performSearch()", MailEditor.delay);
      }
      else if (this.value.length == 0) {
	if (document.currentPopupMenu)
	  hideMenu(document.currentPopupMenu);
      }
  }
  else if (event.keyCode == 13) {
    preventDefault(event);
    if (this.confirmedValue)
      this.value = this.confirmedValue;
    $(this).selectText(0, this.value.length);
    if (document.currentPopupMenu)
      hideMenu(document.currentPopupMenu);
    MailEditor.selectedIndex = -1;
  }
  else if ($('contactsMenu').getStyle('visibility') == 'visible') {
    if (event.keyCode == 38) { // Up arrow
      if (MailEditor.selectedIndex > 0) {
	var contacts = $('contactsMenu').select("li");
	contacts[MailEditor.selectedIndex--].removeClassName("selected");
	this.value = contacts[MailEditor.selectedIndex].firstChild.nodeValue.trim();
	contacts[MailEditor.selectedIndex].addClassName("selected");
      }
    }
    else if (event.keyCode == 40) { // Down arrow
      var contacts = $('contactsMenu').select("li");
      if (contacts.size() - 1 > MailEditor.selectedIndex) {
	if (MailEditor.selectedIndex >= 0)
	  contacts[MailEditor.selectedIndex].removeClassName("selected");
	MailEditor.selectedIndex++;
	this.value = contacts[MailEditor.selectedIndex].firstChild.nodeValue.trim();
	contacts[MailEditor.selectedIndex].addClassName("selected");
      }
    }
  }
}

function performSearch() {
  // Perform address completion
  if (MailEditor.currentField) {
    if (document.contactLookupAjaxRequest) {
      // Abort any pending request
      document.contactLookupAjaxRequest.aborted = true;
      document.contactLookupAjaxRequest.abort();
    }
    if (MailEditor.currentField.value.trim().length > 0) {
      var urlstr = ( UserFolderURL + "Contacts/allContactSearch?search="
		     + MailEditor.currentField.value );
      document.contactLookupAjaxRequest =
	triggerAjaxRequest(urlstr, performSearchCallback, MailEditor.currentField);
    }
  }
  MailEditor.delayedSearch = false;
}

function performSearchCallback(http) {
  if (http.readyState == 4) {
    var menu = $('contactsMenu');
    var list = menu.down("ul");
    
    var input = http.callbackData;
    
    if (http.status == 200) {
      var start = input.value.length;
      var data = http.responseText.evalJSON(true);
      
      if (data.length > 1) {
	list.select("li").each(function(item) {
	    item.remove();
	  });
	
	// Populate popup menu
	for (var i = 0; i < data.length; i++) {
	  var contact = data[i];
	  var completeEmail = contact["displayName"] + " <" + contact["mail"] + ">";
	  var node = document.createElement("li");
	  list.appendChild(node);
	  node.uid = contact["c_uid"];
	  node.appendChild(document.createTextNode(completeEmail));
	  $(node).observe("mousedown", onAddressResultClick);
	}

	// Show popup menu
	var offsetScroll = Element.cumulativeScrollOffset(MailEditor.currentField);
	var offset = Element.cumulativeOffset(MailEditor.currentField);
	var top = offset[1] - offsetScroll[1] + node.offsetHeight + 3;
	var height = 'auto';
	var heightDiff = window.height() - offset[1];
	var nodeHeight = node.getHeight();

	if ((data.length * nodeHeight) > heightDiff)
	    // Limit the size of the popup to the window height, minus 12 pixels
	    height = parseInt(heightDiff/nodeHeight) * nodeHeight - 12 + 'px';

	menu.setStyle({ top: top + "px",
	      left: offset[0] + "px",
	      height: height,
	      visibility: "visible" });
	menu.scrollTop = 0;

	document.currentPopupMenu = menu;
	$(document.body).observe("click", onBodyClickMenuHandler);
      }
      else {
	if (document.currentPopupMenu)
	  hideMenu(document.currentPopupMenu);

	if (data.length == 1) {
	  // Single result
	  var contact = data[0];
	  if (contact["c_uid"].length > 0)
	    input.uid = contact["c_uid"];
	  var completeEmail = contact["displayName"] + " <" + contact["mail"] + ">";
	  if (contact["displayName"].substring(0, input.value.length).toUpperCase()
	      == input.value.toUpperCase())
	    input.value = completeEmail;
	  else
	    // The result matches email address, not user name
	    input.value += ' >> ' + completeEmail;
	  input.confirmedValue = completeEmail;
	  
	  var end = input.value.length;
	  $(input).selectText(start, end);

	  MailEditor.selectedIndex = -1;
	}
      }
    }
    else
      if (document.currentPopupMenu)
	hideMenu(document.currentPopupMenu);
    document.contactLookupAjaxRequest = null;
  }
}

function onAddressResultClick(event) {
  if (MailEditor.currentField) {
    MailEditor.currentField.uid = this.uid;
    MailEditor.currentField.value = this.firstChild.nodeValue.trim();
    MailEditor.currentField.confirmedValue = MailEditor.currentField.value;
  }
}

function initTabIndex(addressList, subjectField, msgArea) {
  var i = 1;
  addressList.select("input.textField").each(function (input) {
      if (!input.readAttribute("readonly")) {
	input.writeAttribute("tabindex", i++);
	input.writeAttribute("autocomplete", "off");
	input.observe("keydown", onContactKeydown); // bind listener for address completion
      }
    });
  subjectField.writeAttribute("tabindex", i++);
  msgArea.writeAttribute("tabindex", i);
}

function initMailEditor() {
  var list = $("attachments");
  $(list).attachMenu("attachmentsMenu");
  var elements = $(list).childNodesWithTag("li");
  for (var i = 0; i < elements.length; i++)
    elements[i].observe("click", onRowClick);

  var listContent = $("attachments").childNodesWithTag("li");
  if (listContent.length > 0)
    $("attachmentsArea").setStyle({ display: "block" });

  var textarea = $("text");
  var textContent = textarea.getValue();
  var sigLimit = textContent.lastIndexOf("--");
  if (sigLimit > -1)
    signatureLength = (textContent.length - sigLimit);
  textarea.scrollTop = textarea.scrollHeight;
  textarea.observe("focus", onTextFirstFocus);
  textarea.observe("focus", onTextFocus);
//   textarea.observe("contextmenu", onTextContextMenu);
  textarea.observe("mousedown", onTextMouseDown, true);

  initTabIndex($("addressList"), $$("div#subjectRow input").first(), textarea);
  onWindowResize(null);

  Event.observe(window, "resize", onWindowResize);
  Event.observe(window, "beforeunload", onMailEditorClose);

  var focusField = (mailIsReply ? textarea : $("addr_0"));
  focusField.focus();
}

function getMenus() {
  return { "attachmentsMenu": new Array(null, onRemoveAttachments,
					onSelectAllAttachments,
					"-",
					onAddAttachment, null) };
}

function onRemoveAttachments() {
  var list = $("attachments");
  var nodes = list.getSelectedNodes();
  for (var i = nodes.length-1; i > -1; i--) {
    var input = $(nodes[i]).node;
    if (input) {
      input.parentNode.removeChild(input);
      list.removeChild(nodes[i]);
    }
    else {
      var filename = "";
      var childNodes = nodes[i].childNodes;
      for (var j = 0; j < childNodes.length; j++) {
	if (childNodes[j].nodeType == 3)
	  filename += childNodes[j].nodeValue;
      }
      var url = "" + window.location;
      var parts = url.split("/");
      parts[parts.length-1] = "deleteAttachment?filename=" + encodeURIComponent(filename);
      url = parts.join("/");
      triggerAjaxRequest(url, attachmentDeleteCallback,
			 nodes[i]);
    }
  }
}

function attachmentDeleteCallback(http) {
  if (http.readyState == 4) {
    if (isHttpStatus204(http.status)) {
      var node = http.callbackData;
      node.parentNode.removeChild(node);
    }
    else
      log("attachmentDeleteCallback: an error occured: " + http.responseText);
  }
}

function onSelectAllAttachments() {
  var list = $("attachments");
  var nodes = list.childNodesWithTag("li");
  for (var i = 0; i < nodes.length; i++)
    nodes[i].selectElement();
}

function onWindowResize(event) {
  var textarea = document.pageform.text;
  var rowheight = (Element.getHeight(textarea) / textarea.rows);
  var headerarea = $("headerArea");
  
  var attachmentsarea = $("attachmentsArea");
  var attachmentswidth = 0;
  if (attachmentsarea.style.display) {
    attachmentswidth = attachmentsarea.getWidth();
    // Resize of attachment list is b0rken under IE7
//    fromfield = $(document).getElementsByClassName('headerField',
//						   headerarea)[0];
//    $("attachments").setStyle({ height: (headerarea.getHeight() - fromfield.getHeight() - 10) + 'px' });
  }
  var subjectfield = headerarea.down("div#subjectRow span.headerField");
  var subjectinput = headerarea.down("div#subjectRow input.textField");
  
  // Resize subject field
  subjectinput.setStyle({ width: (window.width()
				  - $(subjectfield).getWidth()
				  - attachmentswidth
				  - 16) + 'px' });

  // Resize address fields
  var addresslist = $('addressList');
  addresslist.setStyle({ width: ($(this).width() - attachmentswidth - 10) + 'px' });

  // Set textarea position
  textarea.setStyle({ 'top': headerarea.select("hr").first().offsetTop + 'px' });

  // Resize the textarea (message content)
  textarea.rows = Math.round((window.height() - textarea.offsetTop) / rowheight);
}

function onMailEditorClose(event) {
  if (window.shouldPreserve)
    window.shouldPreserve = false;
  else {
    if (window.opener && window.opener.open && !window.opener.closed) {
      var url = "" + window.location;
      var parts = url.split("/");
      parts[parts.length-1] = "delete";
      url = parts.join("/");
      window.opener.deleteDraft(url);
    }
  }

  if (MailEditor.addressBook && MailEditor.addressBook.open
      && !MailEditor.addressBook.closed)
    MailEditor.addressBook.close();

  Event.stopObserving(window, "beforeunload", onMailEditorClose);
}

FastInit.addOnLoad(initMailEditor);