OSM.Note = function (map) {
  var noteLayer = map.noteLayer,
    content = $('#sidebar_content'),
    page = {},
    noteState = map.hasLayer(noteLayer),
    halo;

  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]
    })
  };

  function updateNote(marker, form, method, url) {
    $(form).find("input[type=submit]").prop("disabled", true);

    $.ajax({
      url: url,
      type: method,
      oauth: true,
      data: {text: $(form.text).val()},
      success: function (feature) {
        marker = noteLayer.getLayer(marker);
        if (feature.properties.status == "hidden") {
          noteLayer.removeLayer(marker);
        } else if (marker) {
          marker.setIcon(noteIcons[feature.properties.status]);
        }
        OSM.loadSidebarContent(window.location.pathname, page.load);
      }
    });
  }

  page.pushstate = page.popstate = function (path) {
    OSM.loadSidebarContent(path, page.load);
  };

  page.load = function () {
    content.find("input[type=submit]").on("click", function (e) {
      e.preventDefault();
      var data = $(e.target).data();
      updateNote(data.noteId, e.target.form, data.method, data.url);
    });

    content.find("textarea").on("input", function (e) {
      var form = e.target.form;

      if ($(e.target).val() == "") {
        $(form.close).val(I18n.t("javascripts.notes.show.resolve"));
        $(form.comment).prop("disabled", true);
      } else {
        $(form.close).val(I18n.t("javascripts.notes.show.comment_and_resolve"));
        $(form.comment).prop("disabled", false);
      }
    });

    content.find("textarea").val('').trigger("input");

    var data = $('.details').data();
    if (!noteState) map.addLayer(noteLayer);
    if (!window.location.hash) {
      var coords = data.coordinates.split(',');
      OSM.route.moveListenerOff();
      map.once('moveend', OSM.route.moveListenerOn);

      map.getZoom() > 15 ? map.panTo(coords) : map.setView(coords, 16);
    }

    if (!map.hasLayer(halo)) {
      halo = L.circleMarker(data.coordinates.split(','), {
        weight: 2.5,
        radius: 20,
        fillOpacity: 0.5,
        color: "#FF6200"
      });
      map.addLayer(halo);
    }
  };

  page.unload = function () {
    if (map.hasLayer(halo)) map.removeLayer(halo);
    if (!noteState) map.removeLayer(noteLayer);
  };

  return page;
};