/**
 * Contains ClientDataProxy class
 *
 *  Copyright (C) 2017 R-T Specialty, LLC.
 *
 *  This file is part of the Liza Data Collection Framework.
 *
 *  liza is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @todo This has hard-coded references to the ``quote server'' and LoVullo
 */

var Class               = require( 'easejs' ).Class,
    JqueryHttpDataProxy = require( './proxy/JqueryHttpDataProxy' );


/**
 * Handles additional processing before passing HTTP request off to the
 * requester
 */
module.exports = Class( 'ClientDataProxy' )
    .extend( JqueryHttpDataProxy,
{
    /**
     * Log error (if any) and process data before returning the parent's GET
     * request
     *
     * @param {string}                url      request URL
     * @param {function( Object, * }) callback request callback (success or
     *                                         failure)
     *
     * @return {ClientDataProxy} self
     */
    'protected override getData': function( url, callback )
    {
        var _self = this;

        this.__super( url, function( data, err )
        {
            if ( err )
            {
                console.error( 'XHR GET Error: (%s) %s', url, err );
            }

            callback( _self._processData( data ), err );
        } );

        return this;
    },


    /**
     * Log error (if any) and process data before returning the parent's POST
     * request
     *
     * @param {string}                url      request URL
     * @param {Object}                data     data to post to server
     * @param {function( Object, * }) callback request callback (success or
     *                                         failure)
     *
     * @return {ClientDataProxy} self
     */
    'protected override postData': function( url, data, callback )
    {
        var _self = this;

        this.__super( url, data, function( data, err )
        {
            if ( err )
            {
                console.error( 'XHR POST Error: (%s) %s', url, err );
            }

            callback( _self._processData( data ), err );
        } );
    },


    /**
     * Basic data post-processing
     *
     * If the response is empty/doesn't make sense, this will generate a
     * generic error.
     *
     * @param {Object} data response data
     *
     * @return processed data
     */
    'private _processData': function( data )
    {
        // if the data is null, then we didn't actually get a response from the
        // server - rather, the response was empty (that's bad!)
        data = data || {
            hasError: true,
            content:  'There was a problem communicating with the quote ' +
                'server. If you continue to receive this message, please ' +
                'contact RT Specialty / LoVullo for assistance.'
        };

        return data;
    }
} );