/**
 * contains data for a sql view
 * var s = new cdb.admin.SQLViewData({ sql : "select...." });
 * s.fetch();
 */
cdb.admin.SQLViewData = cdb.admin.CartoDBTableData.extend({

  UNDEFINED_TYPE_COLUMN: 'undefined',

  initialize: function(models, options) {
    this.model.prototype.idAttribute = 'cartodb_id';
    // this.elder('initialize', models, options);
    cdb.admin.CartoDBTableData.prototype.initialize.call(this, models, options);

    this.bind('error', function() {
      this.reset([]);
    });
    //this.initOptions();
    if(options && options.sql) {
      this.setSQL(options.sql);
    }
  },


  _parseSQL: function(sql) {
    sql = sql.replace(/([^\\]){x}/g, '$10').replace(/\\{x}/g, '{x}')
    sql = sql.replace(/([^\\]){y}/g, '$10').replace(/\\{y}/g, '{y}')
    sql = sql.replace(/([^\\]){z}/g, '$10').replace(/\\{z}/g, '{z}')

    // Substitute mapnik tokens
    // resolution at zoom level 0
    var res = '156543.03515625';
    // full webmercator extent
    var ext = 'ST_MakeEnvelope(-20037508.5,-20037508.5,20037508.5,20037508.5,3857)';
    sql = sql.replace('!bbox!', ext)
             .replace('!pixel_width!', res)
             .replace('!pixel_height!', res);

    return sql
  },

  sqlSource: function() {
    return this.options.get('sql_source');
  },

  setSQL: function(sql, opts) {
    opts = opts || {}
    // reset options whiout changing raising a new fetchs
    this.options.set({
      page: 0,
      sort_order: 'asc',
      order_by: '',
      filter_column: '',
      filter_value: '',
      sql_source: opts.sql_source || null
    }, { silent: true } );

    var silent = opts.silent;
    opts.silent = true;
    this.options.set({ sql : sql ? this._parseSQL(sql): '' }, opts);
    if(!silent) {
      this.options.trigger('change:sql', this.options, sql);
    }
  },

  getSQL: function() {
    return this.options.get('sql');
  },

  url: function() {
    return this.sqlApiUrl();
  },

  isReadOnly: function() {
    return this.sqlSource() !== 'filters';
  },

  quartiles: function(nslots, column, callback, error) {
    var tmpl = _.template('SELECT quartile, max(<%= column %>) as maxAmount FROM (SELECT <%= column %>, ntile(<%= slots %>) over (order by <%= column %>) as quartile FROM (<%= sql %>) as _rambo WHERE <%= column %> IS NOT NULL) x GROUP BY quartile ORDER BY quartile');
    this._sqlQuery(tmpl({
      slots: nslots,
      sql: this.options.get('sql'),
      column: column
    }),
    function(data) {
      callback(_(data.rows).pluck('maxamount'));
    },
    error);
  },

  // returns if the query contains geo data
  isGeoreferenced: function() {
    return this.getGeometryTypes().length > 0;
  }

  /*url: function() {
    if(!this.sql) {
      throw "sql must be provided";
    }
    return '/api/v1/queries?sql=' +
      encodeURIComponent(this.sql) +
      '&limit=20&rows_per_page=40&page=0'
  }*/

});