/**
 * Contains JqueryXhttpQuoteTransport 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/>.
 */

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


/**
 * Transfers quote data via an XHTTP request using jQuery
 */
module.exports = Class( 'XhttpQuoteTransport' )
    .implement( QuoteTransport )
    .extend(
{
    /**
     * HttpProxy used to send data
     * @type {HttpProxy}
     */
    'private _proxy': null,

    /**
     * URL to post quote data to
     * @type {string}
     */
    'private _url': '',


    /**
     * Constructs a new quote transport with the destination URL and proxy
     *
     * @param {string}        url   destination URL
     * @param {HttpDataProxy} proxy proxy to use for transfer
     *
     * @return {undefined}
     */
    'public __construct': function( url, proxy )
    {
        this._url   = ''+( url );
        this._proxy = proxy;
    },


    /**
     * Transfers quote data to the remote server
     *
     * The callback function is called even if an error occurs. Be sure to check
     * the error argument for problems before assuming that everything went
     * well.
     *
     * @param {ClientQuote}   quote    quote to transfer
     * @param {function( * )} callback function to call when complete
     *
     * @return void
     */
    'public send': function( quote, callback )
    {
        var _self = this;

        quote.visitData( function( bucket )
        {
            // get the data from the bucket
            var data = _self.getBucketDataJson( bucket );

            // post the data
            _self._proxy.post( _self._url, { data: data },
                function( data, error )
                {
                    if ( typeof callback === 'function' )
                    {
                        callback.call( this, error || null, data );
                    }
                }
            );
        } );
    },


    /**
     * Retrieve bucket data in JSON format
     *
     * Allows subtypes to override what data is retrieved from the bucket
     *
     * @param {Bucket} bucket bucket from which to retrieve data
     *
     * @return {XhttpQuoteTransport} self
     */
    'virtual protected getBucketDataJson': function( bucket )
    {
        // get a "filled" diff containing the merged values of only the fields
        // that have changed
        var data = bucket.getFilledDiff();

        return JSON.stringify( data );
    }
} );