OSM.NewNote = function(map) {
  var noteLayer = map.noteLayer,
    content = $('#sidebar_content'),
    page = {},
    addNoteButton = $(".control-note .control-button"),
    newNote;

  var noteIcons = {
    "new": L.icon({
      iconUrl: "<%= image_path 'new_note_marker.png' %>",
      iconSize: [25, 40],
      iconAnchor: [12, 40]
    }),
    "open": L.icon({
      iconUrl: "<%= image_path 'open_note_marker.png' %>",
      iconSize: [25, 40],
      iconAnchor: [12, 40]
    }),
    "closed": L.icon({
      iconUrl: "<%= image_path 'closed_note_marker.png' %>",
      iconSize: [25, 40],
      iconAnchor: [12, 40]
    })
  };

  page.pushstate = page.popstate = function () {
    page.load();
  };

  addNoteButton.on("click", function (e) {
    e.preventDefault();
    e.stopPropagation();

    OSM.route('/new_note');
  });

  function createNote(marker, form, url) {
    var location = marker.getLatLng();

    marker.options.draggable = false;
    marker.dragging.disable();

    $(form).find("input[type=submit]").prop("disabled", true);

    $.ajax({
      url: url,
      type: "POST",
      oauth: true,
      data: {
        lat: location.lat,
        lon: location.lng,
        text: $(form.text).val()
      },
      success: function (feature) {
        noteCreated(feature, marker);
      }
    });

    function noteCreated(feature, marker) {
      content.find("textarea").val("");
      updateMarker(feature);
      newNote = null;
      noteLayer.removeLayer(marker);
      addNoteButton.removeClass("active");
      OSM.route('/browse/note/' + feature.properties.id);
    }
  }

  function updateMarker(feature) {
    marker = L.marker(feature.geometry.coordinates.reverse(), {
      icon: noteIcons[feature.properties.status],
      opacity: 0.9,
      clickable: true
    });
    marker.id = feature.properties.id;
    marker.addTo(noteLayer);
    return marker;
  }

  function initialize() {
    if (addNoteButton.hasClass("disabled")) return;
    if (addNoteButton.hasClass("active")) return;

    addNoteButton.addClass("active");

    map.addLayer(noteLayer);

    var mapSize = map.getSize();
    var markerPosition;

    if (mapSize.y > 800) {
      markerPosition = [mapSize.x / 2, mapSize.y / 2];
    } else if (mapSize.y > 400) {
      markerPosition = [mapSize.x / 2, 400];
    } else {
      markerPosition = [mapSize.x / 2, mapSize.y];
    }

    newNote = L.marker(map.containerPointToLatLng(markerPosition), {
      icon: noteIcons["new"],
      opacity: 0.9,
      draggable: true
    });

    newNote.addTo(noteLayer);

    newNote.on("remove", function () {
      addNoteButton.removeClass("active");
    }).on("dragstart",function () {
      $(newNote).stopTime("removenote");
    }).on("dragend", function () {
      content.find("textarea").focus();
    });

    content.find("textarea")
      .on("input", disableWhenBlank)
      .focus();

    function disableWhenBlank(e) {
      $(e.target.form.add).prop("disabled", $(e.target).val() === "");
    }

    content.find('input[type=submit]').on('click', function (e) {
      e.preventDefault();
      createNote(newNote, e.target.form, '/api/0.6/notes.json');
    });
  }

  page.load = function () {
    content.load(window.location.pathname + "?xhr=1", function (a, b, xhr) {
      if (xhr.getResponseHeader('X-Page-Title')) {
        document.title = xhr.getResponseHeader('X-Page-Title');
      }
      initialize();
    });
  };

  page.unload = function () {
    noteLayer.removeLayer(newNote);
    addNoteButton.removeClass("active");
  };

  return page;
};