/* hledger web ui javascript */

//----------------------------------------------------------------------
// STARTUP

$(document).ready(function() {

  // show add form if ?add=1
  if ($.url.param('add')) { addformShow(); }

  // sidebar account hover handlers
  $('#sidebar td a').mouseenter(function(){ $(this).parent().addClass('mouseover'); });
  $('#sidebar td').mouseleave(function(){ $(this).removeClass('mouseover'); });

  // keyboard shortcuts
  // 'body' seems to hold focus better than document in FF
  $('body').bind('keydown', 'shift+/', function(){ $('#helpmodal').modal('toggle'); return false; });
  $('body').bind('keydown', 'h',       function(){ $('#helpmodal').modal('toggle'); return false; });
  $('body').bind('keydown', 'j',       function(){ location.href = '/journal'; return false; });
  $('body').bind('keydown', 's',       function(){ sidebarToggle(); return false; });
  $('body').bind('keydown', 'a',       function(){ addformShow(); return false; });
  $('body').bind('keydown', 'n',       function(){ addformShow(); return false; });
  $('body').bind('keydown', '/',       function(){ $('#searchform input').focus(); return false; });
  $('body, #addform input').bind('keydown', 'ctrl+shift+=', addformAddPosting);
  $('body, #addform input').bind('keydown', 'ctrl+=',       addformAddPosting);
  $('body, #addform input').bind('keydown', 'ctrl+-',       addformDeletePosting);
  $('#addform tr.posting:last > td:first input').bind('keydown', 'tab', addformAddPostingWithTab);

});

//----------------------------------------------------------------------
// ADD FORM

function addformShow() {
  addformReset();
  $('#addmodal')
    .on('shown.bs.modal', function (e) {
      addformFocus();
    })
    .modal('show');
}

// Make sure the add form is empty and clean for display.
function addformReset() {
  if ($('form#addform').length > 0) {
    $('form#addform')[0].reset();
    $('input#date').val('today');
    // reset typehead state (though not fetched completions)
    $('.typeahead').typeahead('val', '');
    $('.tt-dropdown-menu').hide();
  }
}

// Focus the first add form field.
function addformFocus() {
  focus($('#addform input#date'));
}

// Focus a jquery-wrapped element, working around http://stackoverflow.com/a/7046837.
function focus($el) {
  setTimeout(function (){
    $el.focus();
  }, 0);
}

// Insert another posting row in the add form.
function addformAddPosting() {
  // do nothing if it's not currently visible
  if (!$('#addform').is(':visible')) return;
  // save a copy of last row
  var lastrow = $('#addform tr.posting:last').clone();

  // replace the submit button with an amount field, clear and renumber it, add the keybindings
  $('#addform tr.posting:last > td:last')
    .html( $('#addform tr.posting:first > td:last').html() );
  var num = $('#addform tr.posting').length;
  $('#addform tr.posting:last > td:last input:last') // input:last here and elsewhere is to avoid autocomplete's extra input
    .val('')
    .prop('id','amount'+num)
    .prop('name','amount'+num)
    .prop('placeholder','Amount '+num)
    .bind('keydown', 'ctrl+shift+=', addformAddPosting)
    .bind('keydown', 'ctrl+=', addformAddPosting)
    .bind('keydown', 'ctrl+-', addformDeletePosting);

  // set up the new last row's account field.
  // First typehead, it's hard to enable on new DOM elements
  var $acctinput = lastrow.find('.account-input:last');
  // XXX nothing works
  // $acctinput.typeahead('destroy'); //,'NoCached');
  // lastrow.on("DOMNodeInserted", function () {
  //   //$(this).find(".typeahead").typeahead();
  //   console.log('DOMNodeInserted');
  //  // infinite loop
	// 	console.log($(this).find('.typeahead'));
  //   //enableTypeahead($(this).find('.typeahead'), accountsSuggester);
  // });
  // setTimeout(function (){
  //   $('#addform tr.posting:last input.account-input').typeahead('destroy');
  //   enableTypeahead($('#addform tr.posting:last input.account-input:last'), accountsSuggester);
  // }, 1000);

  // insert the new last row
  $('#addform > table > tbody').append(lastrow);

  // clear and renumber the field, add keybindings
  $acctinput
    .val('')
    .prop('id','account'+(num+1))
    .prop('name','account'+(num+1))
    .prop('placeholder','Account '+(num+1));
  //lastrow.find('input') // not :last this time
  $acctinput
    .bind('keydown', 'ctrl+shift+=', addformAddPosting)
    .bind('keydown', 'ctrl+=', addformAddPosting)
    .bind('keydown', 'ctrl+-', addformDeletePosting)
    .bind('keydown', 'tab', addformAddPostingWithTab);
}

// Insert another posting row by tabbing within the last field, also advancing the focus.
function addformAddPostingWithTab(ev) {
  // do nothing if called from a non-last row (don't know how to remove keybindings)
  if ($(ev.target).is('#addform input.account-input:last')) {
    addformAddPosting();
    focus($('#addform input.amount-input:last')); // help FF
    return false;
  }
  else
    return true;
}

// Remove the add form's last posting row, if empty, keeping at least two.
function addformDeletePosting() {
  var num = $('#addform tr.posting').length;
  if (num <= 2
      || $('#addform tr.posting:last > td:first input:last').val() != ''
     ) return;
  // copy submit button
  var btn = $('#addform tr.posting:last > td:last').html();
  // remember if the last row's field or button had focus
  var focuslost =
    $('#addform tr.posting:last > td:first input:last').is(':focus')
    || $('#addform tr.posting:last button').is(':focus');
  // delete last row
  $('#addform tr.posting:last').remove();
  // remember if the last amount field had focus
  focuslost = focuslost || 
    $('#addform tr.posting:last > td:last input:last').is(':focus');
  // replace new last row's amount field with the button
  $('#addform tr.posting:last > td:last').html(btn);
  // if deleted row had focus, focus the new last row
  if (focuslost) $('#addform tr.posting:last > td:first input:last').focus();
}

function journalSelect(ev) {
  var textareas = $('textarea', $('form#editform'));
  for (i=0; i<textareas.length; i++) {
    textareas[i].style.display = 'none';
    textareas[i].disabled = true;
  }
  var targ = getTarget(ev);
  if (targ.value) {
    var journalid = targ.value+'_textarea';
    var textarea = document.getElementById(journalid);
  }
  else {
    var textarea = textareas[0];
  }
  textarea.style.display = 'block';
  textarea.disabled = false;
  return true;
}

//----------------------------------------------------------------------
// SIDEBAR

function sidebarToggle() {
  //console.log('sidebarToggle');
  var visible = $('#sidebar').is(':visible');
  //console.log('sidebar visibility was',visible);
  // if opening sidebar, start an ajax fetch of its content
  if (!visible) {
    //console.log('getting sidebar content');
    $.get("sidebar"
         ,null
         ,function(data) {
            //console.log( "success" );
            $("#sidebar-body" ).html(data);
          })
          .done(function() {
            //console.log( "success 2" );
          })
          .fail(function() {
            //console.log( "error" );
          });
  }
  // localStorage.setItem('sidebarVisible', !visible);
  // set a cookie to communicate the new sidebar state to the server
  $.cookie('showsidebar', visible ? '0' : '1');
  // horizontally slide the sidebar in or out
  // how to make it smooth, without delayed content pop-in ?
  //$('#sidebar').animate({'width': 'toggle'});
  //$('#sidebar').animate({'width': visible ? 'hide' : '+=20m'});
  //$('#sidebar-spacer').width(200);
  $('#sidebar').animate({'width': visible ? 'hide' : 'show'});
}

//----------------------------------------------------------------------
// MISC

function enableTypeahead($el, suggester) {
	return $el.typeahead(
		{
			highlight: true
		},
		{
			source: suggester.ttAdapter()
		}
	);
}

/*
// Get the current event's target in a robust way.
// http://www.quirksmode.org/js/events_properties.html
function getTarget(ev) {
  var targ;
  if (!ev) var ev = window.event;
  if (ev.target) targ = ev.target;
  else if (ev.srcElement) targ = ev.srcElement;
  if (targ.nodeType == 3) targ = targ.parentNode;
  return targ;
}
*/