/*jshint globalstrict:true */
/*global angular:true */
/*global L:false*/
/*

  ## Better maps

  So the cavaet for this panel is that, for better or worse, it does NOT use the terms facet and it
  DOES query sequentially. This however means that it transfer more data and is generally heavier
  to computer, while showing less actual data

  ### Parameters
  * size :: How many results to show, more results = slower
  * field :: field containing a 2 element array in the format [lon,lat]
  * tooltip :: field to extract the tool tip value from
  * spyable :: Show the 'eye' icon that reveals the last ES query
*/

'use strict';

angular.module('kibana.bettermap', [])
.controller('bettermap', function($scope, querySrv, dashboard, filterSrv) {

  // Set and populate defaults
  var _d = {
    status  : "Experimental",
    queries     : {
      mode        : 'all',
      ids         : []
    },
    size    : 1000,
    spyable : true,
    tooltip : "_id",
    field   : null,
    group   : "default"
  };
  _.defaults($scope.panel,_d);

  $scope.init = function() {
    $scope.$on('refresh',function(){
      $scope.get_data();
    });
    $scope.get_data();
  };

  $scope.get_data = function(segment,query_id) {
    $scope.panel.error =  false;

    // Make sure we have everything for the request to complete
    if(dashboard.indices.length === 0) {
      return;
    }

    if(_.isUndefined($scope.panel.field)) {
      $scope.panel.error = "Please select a field that contains geo point in [lon,lat] format";
      return;
    }
    
    // Determine the field to sort on
    var timeField = _.uniq(_.pluck(filterSrv.getByType('time'),'field'));
    if(timeField.length > 1) {
      $scope.panel.error = "Time field must be consistent amongst time filters";
    } else if(timeField.length === 0) {
      timeField = null;
    } else {
      timeField = timeField[0];
    }

    var _segment = _.isUndefined(segment) ? 0 : segment;

    $scope.panel.queries.ids = querySrv.idsByMode($scope.panel.queries);
    // This could probably be changed to a BoolFilter 
    var boolQuery = $scope.ejs.BoolQuery();
    _.each($scope.panel.queries.ids,function(id) {
      boolQuery = boolQuery.should(querySrv.getEjsObj(id));
    });

    var request = $scope.ejs.Request().indices(dashboard.indices[_segment])
      .query($scope.ejs.FilteredQuery(
        boolQuery,
        filterSrv.getBoolFilter(filterSrv.ids).must($scope.ejs.ExistsFilter($scope.panel.field))
      ))
      .fields([$scope.panel.field,$scope.panel.tooltip])
      .size($scope.panel.size);

    if(!_.isNull(timeField)) {
      request = request.sort(timeField,'desc');
    }

    $scope.populate_modal(request);

    var results = request.doSearch();

    // Populate scope when we have results
    results.then(function(results) {
      $scope.panel.loading = false;

      if(_segment === 0) {
        $scope.hits = 0;
        $scope.data = [];
        query_id = $scope.query_id = new Date().getTime();
      }

      // Check for error and abort if found
      if(!(_.isUndefined(results.error))) {
        $scope.panel.error = $scope.parse_error(results.error);
        return;
      }

      // Check that we're still on the same query, if not stop
      if($scope.query_id === query_id) {

        var scripts = $LAB.script("panels/bettermap/lib/leaflet.js").wait();

        scripts.wait(function(){
          $scope.data = $scope.data.concat(_.map(results.hits.hits, function(hit) {
            return {
              coordinates : new L.LatLng(hit.fields[$scope.panel.field][1],hit.fields[$scope.panel.field][0]),
              tooltip : hit.fields[$scope.panel.tooltip]
            };
          }));
        });
        // Keep only what we need for the set
        $scope.data = $scope.data.slice(0,$scope.panel.size);

      } else {
        return;
      }
  
      $scope.$emit('draw');

      // Get $size results then stop querying
      if($scope.data.length < $scope.panel.size && _segment+1 < dashboard.indices.length) {
        $scope.get_data(_segment+1,$scope.query_id);
      }

    });
  };

  // I really don't like this function, too much dom manip. Break out into directive?
  $scope.populate_modal = function(request) {
    $scope.modal = {
      title: "Inspector",
      body : "<h5>Last Elasticsearch Query</h5><pre>"+
          'curl -XGET '+config.elasticsearch+'/'+dashboard.indices+"/_search?pretty -d'\n"+
          angular.toJson(JSON.parse(request.toString()),true)+
        "'</pre>", 
    }; 
  };

})
.directive('bettermap', function() {
  return {
    restrict: 'A',
    link: function(scope, elem, attrs) {

      elem.html('<center><img src="common/img/load_big.gif"></center>');

      // Receive render events
      scope.$on('draw',function(){
        render_panel();
      });

      scope.$on('render', function(){
        if(!_.isUndefined(map)) {
          map.invalidateSize();
          var panes = map.getPanes();
        }
      });

      var map, markers, layerGroup, mcg;

      function render_panel() { 
        scope.panel.loading = false;

        var scripts = $LAB.script("panels/bettermap/lib/leaflet.js").wait()
          .script("panels/bettermap/lib/plugins.js");
   
        //add markers dynamically
        scripts.wait(function(){
          if(_.isUndefined(map)) {
            map = L.map(attrs.id, {
              scrollWheelZoom: false,
              center: [40, -86],
              zoom: 10
            });

            L.tileLayer('http://{s}.tile.cloudmade.com/57cbb6ca8cac418dbb1a402586df4528/22677/256/{z}/{x}/{y}.png', {
              maxZoom: 18,
              minZoom: 2
            }).addTo(map);
            layerGroup = new L.MarkerClusterGroup({maxClusterRadius:30});
          } else {
            layerGroup.clearLayers();
          }

          _.each(scope.data, function(p) {
            if(!_.isUndefined(p.tooltip) && p.tooltip !== '') {
              layerGroup.addLayer(L.marker(p.coordinates).bindLabel(p.tooltip));
            } else {
              layerGroup.addLayer(L.marker(p.coordinates));
            }
          });

          layerGroup.addTo(map);

          map.fitBounds(_.pluck(scope.data,'coordinates'));
        });
      }
    }
  };
});