(function () {
  'use strict';

  function InsertMapDirective($compile, $templateCache) {
    function link($scope, elem) {
      var segments = $scope.segments,
          picturesData = (segments || {}).picturesData;
      var list = segments.list();
      var topLeft = $scope.topLeft,
        topRight = $scope.topRight,
        bottomLeft = $scope.bottomLeft,
        bottomRight = $scope.bottomRight;
      var div = elem[0];
      var map = L.map(div);

      var outerBounds;

      var count = list.length;

      function createIcon(location, className, html) {
        var icon = L.divIcon({
          className: className,
          html: html
        });

        return L.marker(location, {icon: icon});
      }

      angular.forEach(list, function (segment, index) {
        var className = 'segment-' + index;

        var gpxLayer;
        segment.gpx.then(function (gpx) {
          gpxLayer = new L.GPX(gpx, {
            marker_options: {
              // define where the icons are
              startIconUrl: undefined && 'bower_components/leaflet-gpx/pin-icon-start.png',
              endIconUrl: undefined && 'bower_components/leaflet-gpx/pin-icon-end.png',
              shadowUrl: undefined && 'bower_components/leaflet-gpx/pin-shadow.png'
            },
            polyline_options: {
              className: className,
              color: segment.color
            },
            clickable: false
          })
            .on('loaded', function (e) {
              var layer = e.target;
              var bounds = e.target.getBounds();

              segment.bounds = bounds;
              segment.start = e.target.get_start();
              segment.end = e.target.get_end();

              if (outerBounds) {
                outerBounds.extend(bounds);
              } else {
                outerBounds = bounds;
              }

              // console.log('Box for ' + segment.title, bounds);

              count--;
              if (count == 0) {
                console.log('Loaded all maps, outerBounds', outerBounds);
                map.fitBounds(outerBounds);

                angular.forEach(list, function (s, index) {

                  var icon;
                  if (index == 0) {
                    createIcon(s.start, 'icon-start', "<i class='fa fa-arrow-circle-o-up fa-3x'/>")
                      .addTo(map);
                  }

                  if (index == list.length - 1) {
                    createIcon(s.end, 'icon-end', "<i class='fa fa-arrow-circle-o-down fa-3x'/>")
                      .addTo(map);
                  } else {
                    //createIcon(s.end, 'icon-stop', "<i class='fa fa-pause fa-3x'/>")
                    //  .addTo(map);
                  }
                });

                L.marker(segments.last.end, {
                  icon: L.divIcon({
                    className: 'icon-end',
                    html: "<i class='fa fa-arrow-circle-o-down fa-3x'/>"
                  })
                }).addTo(map);
              }
              layer.addTo(map);
            });
        });

        segment.on('blur', function () {
          // TODO: make normal
          //gpxLayer.setStyle({color: 'blue'});
        });
        segment.on('focus', function () {
          // TODO: make wider
          //gpxLayer.setStyle({color: 'red'});
        });
      });

      var osmLayer = L.tileLayer('//{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
        attribution: '&copy; <a href="https://openstreetmap.org/copyright">OpenStreetMap</a> contributors' +
        '| <a href="http://fortawesome.github.io/Font-Awesome/license/">Font Awesome</a>'
      });
      osmLayer.addTo(map);

      if (picturesData) {
        var options = {
          styleXX: function(feature) {
            console.log('feature', feature);
          }, onEachFeature: function(feature, layer) {
            var popupOptions = {
              maxWidth: 200,
              minWidth: 100,
              closeButton: false
            };
            var canvas = document.createElement('canvas');
            canvas.setAttribute("height", 100);
            canvas.setAttribute("width", 150);
            var ctx = canvas.getContext("2d");
            var img = document.createElement('img');
            img.onload = function() {
              var scale = 200 / img.width;
              var aspect = img.width / img.height;
              console.log('image loaded', img.width, img.height, scale, aspect);
              // ctx.drawImage(img, img.width, img.height);
              // ctx.drawImage(img, canvas.width/2-img.width/2, canvas.height/2-img.width/2);
              ctx.drawImage(img, 0, 0, 200, img.height * scale);
            }
            img.src = 'pictures/' + feature.id;

            // var div = document.createElement('div');
            // div.appendChild(canvas);
//            layer.bindPopup("<div><img src='pictures/" + feature.id + "' width='400px'/></div>", popupOptions);
            layer.bindPopup(canvas, popupOptions);
          }, filter: function(feature, layer) {
//            console.log('feature', feature);
            return true;
          }
        };

        var picturesLayer = L.geoJson(undefined, options).addTo(map);
        picturesData.then(function(json) {
            console.log('geo json', json);
            picturesLayer.addData(json);
        });
      }

      function createLegend(position, templateUrl) {
        console.log('Creating legend for ' + position + ' from ' + templateUrl);
        var legend = L.control({position: position});

        legend.onAdd = function () {
          var div = L.DomUtil.create('div', 'info legend');

          var t = $templateCache.get(templateUrl);
          if (!t) {
            throw "Could not load template: " + bottomRight;
          }

          var compiled = $compile(t);
          var fragment = compiled($scope);

          if (fragment.length != 1) {
            throw "Invalid template, must contain exactly one root element.";
          }

          return fragment[0];
        };
        return legend;
      }

      topLeft && createLegend('topleft', topLeft).addTo(map);
      topRight && createLegend('topright', topRight).addTo(map);
      bottomLeft && createLegend('bottomleft', bottomLeft).addTo(map);
      bottomRight && createLegend('bottomright', bottomRight).addTo(map);
    }

    return {
      restrict: 'E',
      template: '<div/>',
      scope: {
        segments: '=',
        topLeft: '=',
        topRight: '=',
        bottomLeft: '=',
        bottomRight: '='
      },
      replace: true,
      link: link
    }
  }

  function GpxGalleryController($http, $q, $injector) {
    function Segments() {
      var self = this;
      var list = [];
      var failed = false;
      self.picturesUrl = undefined,

      //self.colors = ['#a6cee3', '#1f78b4', '#b2df8a', '#33a02c', '#fb9a99', '#e31a1c', '#fdbf6f', '#ff7f00', '#cab2d6', '#6a3d9a', '#ffff99', '#b15928'];
      //self.colors = ['#feebe2', '#fbb4b9', '#f768a1', '#c51b8a', '#7a0177'];
      //self.colors = [ '#fc9272', '#fb6a4a', '#ef3b2c', '#cb181d', '#a50f15', '#67000d'];
      self.colors = [ '#00441b', '#4d004b', '#084081', '#7f0000'];

      var scope = $injector.get('$rootScope');

      this.on = function (name, listener) {
        scope.$on(name, listener);
      };

      this.add = function (gpxUrl, title) {
        list.push(new Segment(this, list.length, scope.$new(), gpxUrl, title));
        return this;
      };

      this.init = function () {
        var count = list.length;

        angular.forEach(list, function (segment, index) {
          segment.first = index == 0;
          segment.last = index == count - 1;
          segment.middle = !segment.first && !segment.last;
        });
        self.first = list[0];
        self.last = list[list.length - 1];

        angular.forEach(list, function (segment) {
          $http.get(segment.gpxUrl).then(function (res) {
            segment.process(res.data);
          }, function () {
            failed = true;
          }).finally(function () {
            count--;
            if (count == 0) {
              console.log('All GPX files loaded');
              ctrl.ready = true;
            }
          });
        });

        if (self.picturesUrl) {
          self.picturesData = $http.get(self.picturesUrl).then(function(res) {
            return res.data;
          });
        }
      };

      this.list = function () {
        return list;
      };

      this.focus = function (segment) {
        angular.forEach(list, function (s) {
          if (s === segment) {
            s.emit('focus', {segment: s});
          } else {
            s.emit('blur', {segment: s});
          }
        });
      };
    }

    function Segment(segments, index, scope, gpxUrl, name) {
      var segment = this;
      this.gpxUrl = gpxUrl;
      this.title = name;
      this.color = segments.colors[index % segments.colors.length];

      this.broadcast = scope.$broadcast;
      this.on = function (name, listener) {
        scope.$on(name, listener);
      };
      this.emit = function (name, args) {
        scope.$emit(name, args);
      };

      var gpxQ = $q.defer();
      this.gpx = gpxQ.promise;

      this.process = function (string) {
        console.log("GPX for " + this.title + " loaded");
        gpxQ.resolve(string);
      };

      this.focus = function () {
        segments.focus(this);
      };
    }

    var ctrl = this;

    ctrl.ready = false;

    ctrl.segments = new Segments()
      .add('gpx/I villreinens forspor, dag 1.gpx', 'Dag 1')
      .add('gpx/I villreinens forspor, dag 2.gpx', 'Dag 2')
      .add('gpx/I villreinens forspor, dag 3.gpx', 'Dag 3')
      .add('gpx/I villreinens forspor, dag 4.gpx', 'Dag 4');
    ctrl.segments.picturesUrl = '//trygvis.io/~trygvis/2015/08/i-villregnens-fotspor/pictures/index.php';

    ctrl.segments.init();
  }

  angular
    .module('gpx-gallery', [])
    .directive('insertMap', InsertMapDirective)
    .controller('GpxGalleryController', GpxGalleryController);
}());