var IndexTankCollection = IndexTankService.extend({

		/**
		 */

		'override __construct': function(config, name)
		{
			this._super(config);

			this.name = name;

			this._insertBatch = [];
			this._lazyInsertCallback = lazyCallback(this.getMethod('_insertDocBatch'), 500)
		},

		/**
		 * adds to the collection
		 */

		'create': function(callback)
		{
			this._put(this._getIndexUrl(), callback);
		},

		/**
		 * removes the collection
		 */

		'remove': function(callback)
		{
			this._delete(this._getIndexUrl(), callback);
		},

		/**
		 * returns the metadata of given collection
		 */

		'getMetadata': function(callback)
		{
			this._get(this._getIndexUrl(), callback);
		},

		/**
		 * adds a document to the index
		 * @ops
		 *    - @docid the document identifier
		 * 	  - @fields a map from field name to field value
		 *    - @variables a map of the var number to float
		 *    - @categories a map from the category name to its value
		 */

		'addDoc': function(ops, callback)
		{
			if(ops.fields._id)
			{
				ops.docid = ops.fields._id.toString();
				delete ops.fields._id;
			}


			//send batch collections
			this._insertBatch.push(ops);

			//start the insertion process
			this._lazyInsertCallback();
		},

		/**
		 * removes a doc
		 */

		'removeDoc': function(docid, callback)
		{
			this._delete(this._getIndexUrl() + '/docs', JSON.stringify({ docid: docid }), callback);
		},

		/**
		 * searches for a document
		 * @ops
		 * 		- @q the query string
		 *		- @len the number of items to return
		 *		- @function the the number of scoring function to use
		 * 		- @fetch comma-separated list of fields to fetch. * returns all
		 * 		- @snippet comma-separated list of fields to snippet
		 * 		- @var<n> value of query variable
		 * 		- @category_filters json map of categoriy name
		 * 		- @filter_docvar comma-separated list of ranges to filter
		 * 		- @filter_function comma-separated list of ranges to filter the values of functions.
		 */

		'search': function(ops, callback)
		{
			this._get(this._getIndexUrl() + '/search', ops, callback);
		},

		/**
		 * promotes item to the top of the query's result page
		 */

		'promote': function(docid, query)
		{
			this._put(this._getIndexUrl() + '/promote', { docid: docid, query: query }, function()
			{

			});
		},

		/**
		 */

		'autoComplete': function(query, callbackString, callback)
		{
			this._get(this._getIndexUrl() + '/autocomplete', {query: query, callback: callbackString }, callback);
		},

		/**
		 * inserts a batch of documents
		 */

		'_insertDocBatch': function()
		{
			var batch = this._insertBatch;
			this._insertBatch = [];

			this._put(this._getIndexUrl() + '/docs', JSON.stringify(batch), function()
			{
				console.log("INSERTED")
			});
		},

		/**
		 * returns the index url
		 */

		'_getIndexUrl': function()
		{
			return '/indexes/' + this.name;
		}
	});