/*

  ## Table

  A paginated table of events matching a query

  ### Parameters
  * query ::  A string representing then current query
  * size :: Number of events per page to show
  * pages :: Number of pages to show. size * pages = number of cached events. 
             Bigger = more memory usage byh the browser
  * offset :: Position from which to start in the array of hits
  * sort :: An array with 2 elements. sort[0]: field, sort[1]: direction ('asc' or 'desc')
  * style :: hash of css properties
  * fields :: columns to show in table
  * sortable :: Allow sorting?
  * spyable :: Show the 'eye' icon that reveals the last ES query for this panel
  ### Group Events
  #### Sends
  * table_documents :: An array containing all of the documents in the table. 
                       Only used by the fields panel so far. 
  #### Receives
  * time :: An object containing the time range to use and the index(es) to query
  * query :: An Array of queries, even if its only one
  * sort :: An array with 2 elements. sort[0]: field, sort[1]: direction ('asc' or 'desc')
  * selected_fields :: An array of fields to show
*/

angular.module('kibana.table', [])
.controller('table', function($scope, eventBus, fields) {

  // Set and populate defaults
  var _d = {
    query   : "*",
    size    : 100, // Per page
    pages   : 5,   // Pages available
    offset  : 0,
    sort    : ['@timestamp','desc'],
    group   : "default",
    style   : {'font-size': '9pt'},
    fields  : [],
    sortable: true,
    spyable: true,
  }
  _.defaults($scope.panel,_d)

  $scope.init = function () {

    $scope.set_listeners($scope.panel.group)
    // Now that we're all setup, request the time from our group
    eventBus.broadcast($scope.$id,$scope.panel.group,"get_time")
  }

  $scope.set_listeners = function(group) {
    eventBus.register($scope,'time',function(event,time) {
      $scope.panel.offset = 0;
      set_time(time)
    });
    eventBus.register($scope,'query',function(event,query) {
      $scope.panel.offset = 0;
      $scope.panel.query = _.isArray(query) ? query[0] : query;
      $scope.get_data();
    });
    eventBus.register($scope,'sort', function(event,sort){
      $scope.panel.sort = _.clone(sort);
      $scope.get_data();
    });
    eventBus.register($scope,'selected_fields', function(event, fields) {
      $scope.panel.fields = _.clone(fields)
    });
      eventBus.register($scope,'table_documents', function(event, docs) {
          $scope.panel.query = docs.query;
          $scope.data = docs.docs;
      });
  }

  $scope.set_sort = function(field) {
    if($scope.panel.sort[0] === field)
      $scope.panel.sort[1] = $scope.panel.sort[1] == 'asc' ? 'desc' : 'asc';
    else
      $scope.panel.sort[0] = field;
    $scope.get_data();
  }

  $scope.toggle_field = function(field) {
    if (_.indexOf($scope.panel.fields,field) > -1) 
      $scope.panel.fields = _.without($scope.panel.fields,field)
    else
      $scope.panel.fields.push(field)
    broadcast_results();
  }

  $scope.toggle_details = function(row) {
    row.kibana = row.kibana || {};
    row.kibana.details = !row.kibana.details ? $scope.without_kibana(row) : false;
  }

  $scope.page = function(page) {
    $scope.panel.offset = page*$scope.panel.size
    $scope.get_data();
  }

  $scope.build_search = function(field,value,negate) {
    $scope.panel.query = add_to_query($scope.panel.query,field,value,negate)
    $scope.panel.offset = 0;
    $scope.get_data();
    eventBus.broadcast($scope.$id,$scope.panel.group,'query',$scope.panel.query);
  }

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

    // Make sure we have everything for the request to complete
    if(_.isUndefined($scope.index) || _.isUndefined($scope.time))
      return
    
    $scope.panel.loading = true;

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

    var request = $scope.ejs.Request().indices($scope.index[_segment])
      .query(ejs.FilteredQuery(
        ejs.QueryStringQuery($scope.panel.query || '*'),
        ejs.RangeFilter($scope.time.field)
          .from($scope.time.from)
          .to($scope.time.to)
        )
      )
      .size($scope.panel.size*$scope.panel.pages)
      .sort($scope.panel.sort[0],$scope.panel.sort[1]);

    $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) {
        $scope.data= $scope.data.concat(_.map(results.hits.hits, function(hit) {
          return flatten_json(hit['_source']);
        }));
        
        $scope.hits += results.hits.total;

        // Sort the data
        $scope.data = _.sortBy($scope.data, function(v){
          return v[$scope.panel.sort[0]]
        });
        
        // Reverse if needed
        if($scope.panel.sort[1] == 'desc')
          $scope.data.reverse();
        
        // Keep only what we need for the set
        $scope.data = $scope.data.slice(0,$scope.panel.size * $scope.panel.pages)

      } else {
        return;
      }
      
      // This breaks, use $scope.data for this
      $scope.all_fields = get_all_fields($scope.data);
      broadcast_results();

      // If we're not sorting in reverse chrono order, query every index for
      // size*pages results
      // Otherwise, only get size*pages results then stop querying
      if(
          ($scope.data.length < $scope.panel.size*$scope.panel.pages || 
            !(($scope.panel.sort[0] === $scope.time.field) && $scope.panel.sort[1] === 'desc')) && 
          _segment+1 < $scope.index.length
      ) {
        $scope.get_data(_segment+1,$scope.query_id)
      }

    });
  }

  $scope.populate_modal = function(request) {
    $scope.modal = {
      title: "Table Inspector",
      body : "<h5>Last Elasticsearch Query</h5><pre>"+
          'curl -XGET '+config.elasticsearch+'/'+$scope.index+"/_search?pretty -d'\n"+
          angular.toJson(JSON.parse(request.toString()),true)+
        "'</pre>", 
    } 
  }

  $scope.without_kibana = function (row) {
    row = _.clone(row)
    delete row.kibana
    return row
  } 

  // Broadcast a list of all fields. Note that receivers of field array 
  // events should be able to receive from multiple sources, merge, dedupe 
  // and sort on the fly if needed.
  function broadcast_results() {
    eventBus.broadcast($scope.$id,$scope.panel.group,"fields", {
      all   : $scope.all_fields,
      sort  : $scope.panel.sort,
      active: $scope.panel.fields      
    });
    eventBus.broadcast($scope.$id,$scope.panel.group,"table_documents", 
      {query:$scope.panel.query,docs:$scope.data});
  }

  function set_time(time) {
    $scope.time = time;
    $scope.index = _.isUndefined(time.index) ? $scope.index : time.index
    $scope.get_data();
  }

});