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

  ## 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
  * overflow :: 'height' or 'min-height' controls wether the row will expand (min-height) to
                to fit the table, or if the table will scroll to fit the row (height) 
  * 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
  * selected_fields :: An array of fields to show
*/

'use strict';

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

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

  $scope.init = function () {

    $scope.set_listeners($scope.panel.group);

    $scope.get_data();
  };

  $scope.set_listeners = function(group) {
    $scope.$on('refresh',function(){$scope.get_data();});
    eventBus.register($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) {
      querySrv.list[querySrv.ids[0]].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();
  };

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

  $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) {
    var query = field+":";
    // This needs to be abstracted somewhere
    if(_.isArray(value)) {
      query = query+"(" + _.map(value,function(v){return angular.toJson(v);}).join(" AND ") + ")";
    } else {
      query = query+angular.toJson(value);
    }
    filterSrv.set({type:'querystring',query:query,mandate:(negate ? 'mustNot':'must')});
    $scope.panel.offset = 0;
    dashboard.refresh();
  };

  $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;
    }
    
    $scope.panel.loading = true;

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

    var request = $scope.ejs.Request().indices(dashboard.indices[_segment]);

    var boolQuery = $scope.ejs.BoolQuery();
    _.each(querySrv.list,function(q) {
      boolQuery = boolQuery.should(querySrv.toEjsObj(q));
    });

    request = request.query(
      $scope.ejs.FilteredQuery(
        boolQuery,
        filterSrv.getBoolFilter(filterSrv.ids)
      ))
      .highlight(
        $scope.ejs.Highlight($scope.panel.highlight)
        .fragmentSize(2147483647) // Max size of a 32bit unsigned int
        .preTags('@start-highlight@')
        .postTags('@end-highlight@')
      )
      .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 {
            _source   : kbn.flatten_json(hit._source),
            highlight : kbn.flatten_json(hit.highlight||{})
          };
        }));
        
        $scope.hits += results.hits.total;

        // Sort the data
        $scope.data = _.sortBy($scope.data, function(v){
          return v._source[$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
      $scope.all_fields = kbn.get_all_fields(_.pluck($scope.data,'_source'));
      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
      //($scope.data.length < $scope.panel.size*$scope.panel.pages
     // || !(($scope.panel.sort[0] === $scope.time.field) && $scope.panel.sort[1] === 'desc'))
      if($scope.data.length < $scope.panel.size*$scope.panel.pages &&
        _segment+1 < dashboard.indices.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+'/'+dashboard.indices+"/_search?pretty -d'\n"+
          angular.toJson(JSON.parse(request.toString()),true)+
        "'</pre>", 
    }; 
  };

  $scope.without_kibana = function (row) {
    return { 
      _source   : row._source,
      highlight : row.highlight
    };
  }; 

  // 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: querySrv.list[querySrv.ids[0]].query,
        docs : _.pluck($scope.data,'_source'),
        index: $scope.index
      });
  }

  $scope.set_refresh = function (state) { 
    $scope.refresh = state; 
  };

  $scope.close_edit = function() {
    if($scope.refresh) {
      $scope.get_data();
    }
    $scope.refresh =  false;
  };


})
.filter('highlight', function() {
  return function(text) {
    if (!_.isUndefined(text) && !_.isNull(text) && text.toString().length > 0) {
      return text.toString().
        replace(/&/g, '&amp;').
        replace(/</g, '&lt;').
        replace(/>/g, '&gt;').
        replace(/\r?\n/g, '<br/>').
        replace(/@start-highlight@/g, '<code class="highlight">').
        replace(/@end-highlight@/g, '</code>');
    }
    return '';
  };
});