/*!
 * socket.io-node
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

/**
 * Module requirements.
 */
var WebSocket = require( './websocket' );

/**
 * Export the constructor.
 */

exports = module.exports = FlashSocket;

/**
 * The FlashSocket transport is just a proxy
 * for WebSocket connections.
 *
 * @api public
 */

function FlashSocket( mng, data, req ) {
	return WebSocket.call( this, mng, data, req );
}

/**
 * Inherits from WebSocket.
 */

FlashSocket.prototype.__proto__ = WebSocket.prototype;

/**
 * Transport name
 *
 * @api public
 */

FlashSocket.prototype.name = 'flashsocket';

/**
 * Listens for new configuration changes of the Manager
 * this way we can enable and disable the flash server.
 *
 * @param {Manager} Manager instance.
 * @api private
 */


FlashSocket.init = function ( manager ) {
	var server;

	function create() {
		server = require( 'policyfile' ).createServer( {
			log : function ( msg ) {
				manager.log.info( msg.toLowerCase() );
			}
		}, manager.get( 'origins' ) );

		server.on( 'close', function ( e ) {
			server = null;
		} );

		server.listen( manager.get( 'flash policy port' ), manager.server );

		manager.flashPolicyServer = server;
	}

	// listen for origin changes, so we can update the server
	manager.on( 'set:origins', function ( value, key ) {
		if ( !server ) {
			return;
		}

		// update the origins and compile a new response buffer
		server.origins = Array.isArray( value ) ? value : [value];
		server.compile();
	} );

	// destory the server and create a new server
	manager.on( 'set:flash policy port', function ( value, key ) {
		var transports = manager.get( 'transports' );
		if ( ~transports.indexOf( 'flashsocket' ) ) {
			if ( server ) {
				if ( server.port === value ) {
					return;
				}
				// destroy the server and rebuild it on a new port
				try {
					server.close();
				}
				catch ( e ) { /* ignore exception. could e.g. be that the server isn't started yet */
				}
			}
			create();
		}
	} );

	// only start the server
	manager.on( 'set:transports', function ( value, key ) {
		if ( !server && ~manager.get( 'transports' ).indexOf( 'flashsocket' ) ) {
			create();
		}
	} );
	// check if we need to initialize at start
	if ( ~manager.get( 'transports' ).indexOf( 'flashsocket' ) ) {
		create();
	}
};