/** Sample platform outline
 *  based on Sonos platform
 */
'use strict';
var types = require("HAP-NodeJS/accessories/types.js");
//var hardware = require('myHardwareSupport'); //require any additional hardware packages
var knxd = require('eibd');

function KNXPlatform(log, config){
    this.log = log;
    this.config = config;
//    this.property1 = config.property1;
//    this.property2 = config.property2;
    
    
    // initiate connection to bus for listening ==> done with first shim
    
};

KNXPlatform.prototype = {
    accessories: function(callback) {
        this.log("Fetching KNX devices.");
        var that = this;
        
        
        // iterate through all devices the platform my offer
        // for each device, create an accessory
        
        // read accessories from file !!!!!
        var foundAccessories = this.config.accessories; 
        
        
        //create array of accessories
        var myAccessories = [];
        
        for (var int = 0; int < foundAccessories.length; int++) {
        	this.log("parsing acc " + int + " of " + foundAccessories.length);
        	// instantiate and push to array
        	if (foundAccessories[int].accessory_type === "knxlamp") {
        		this.log("push new lamp with "+foundAccessories[int].name);
        		foundAccessories[int].knxd_ip = this.config.knxd_ip;
        		foundAccessories[int].knxd_port = this.config.knxd_port;
        		var accConstructor = require('./../accessories/knxlamp.js');
        		var acc = new accConstructor.accessory(this.log,foundAccessories[int]);
        		this.log("created "+acc.name+" accessory");
        		myAccessories.push(acc);
        	} else {
        		// do something else
        		this.log("unkown accessory type found")
        	} //etc.
        	
        };	
        // if done, return the array to callback function
        this.log("returning "+myAccessories.length+" accessories");
        callback(myAccessories);
    }
};
        

// the signature of the constructor has to be adopted to the accessory you need in your platform! These are the first lines from the sonos platform
function myAccessoryType1(log, config, device, description /* add or remove parms as you need*/ ) {
	
    this.log = log;
    this.config = config;
    this.device = device;
    this.description = description;
    // more initialization if required

}

myAccessoryType1.prototype = {
		// see https shim wiki page for details. Accessory definition is discussed there.
}

// more


/**
 * The buscallbacks module is to expose a simple function to listen on the bus and register callbacks for value changes
 * of registered addresses.
 * 
 * Usage:
*	 You can start the monitoring process at any time
	 startMonitor({host: name-ip, port: port-num });
	 
*	 You can add addresses to the subscriptions using 
	 
registerGA(groupAddress, callback)
	 
*	 groupAddress has to be an groupAddress in common knx notation string '1/2/3'
*	 the callback has to be a 
*	 	var f = function(value) { handle value update;}
*	 so you can do a 
*	 	registerGA('1/2/3', function(value){
*	 		console.log('1/2/3 got a hit with '+value);
*	 		});
*	 but of course it is meant to be used programmatically, not literally, otherwise it has no advantage
*	
*	 You can also use arrays of addresses if your callback is supposed to listen to many addresses:

registerGA(groupAddresses[], callback)

*	as in 
*	 	registerGA(['1/2/3','1/0/0'], function(value){
*	 		console.log('1/2/3 or 1/0/0 got a hit with '+value);
*	 		});
*  if you are having central addresses like "all lights off" or additional response objects
*  
*  
*  callbacks can have a signature of
*  function(value, src, dest, type) but do not have to support these parameters (order matters)
*  src = physical address such as '1.1.20'
*  dest = groupAddress hit (you subscribed to that address, remember?), as '1/2/3'
*  type = Data point type, as 'DPT1' 
*  
*  	
*/



// array of registered addresses and their callbacks
var subscriptions = []; 
// check variable to avoid running two listeners
var running; 

function groupsocketlisten(opts, callback) {
	var conn = knxd.Connection();
	conn.socketRemote(opts, function() {
		conn.openGroupSocket(0, callback);
	});
}


var registerSingleGA = function registerSingleGA (groupAddress, callback) {
	subscriptions.push({address: groupAddress, callback: callback });
}
		 
/*
 * public busMonitor.startMonitor()
 * starts listening for telegrams on KNX bus
 * 
 */ 
var startMonitor = function startMonitor(opts) {  // using { host: name-ip, port: port-num } options object
	if (!running) {
		running = true;
	} else {
		return null;
	}
		
    groupsocketlisten(opts, function(parser) {
    	//console.log("knxfunctions.read: in callback parser");
        parser.on('write', function(src, dest, type, val){
            // search the registered group addresses
            for (var i = 0; i < subscriptions.length; i++) {
            	// iterate through all registered addresses
            	if (subscriptions[i].address === dest) {
            		// found one, notify
                    //console.log('HIT: Write from '+src+' to '+dest+': '+val+' ['+type+']');
            		subscriptions[i].callback(val, src, dest, type);
            	}
            }
          });

          parser.on('response', function(src, dest, type, val) {
            // search the registered group addresses
            for (var i = 0; i < subscriptions.length; i++) {
            	// iterate through all registered addresses
            	if (subscriptions[i].address === dest) {
            		// found one, notify
                    //console.log('HIT: Response from '+src+' to '+dest+': '+val+' ['+type+']');
                    subscriptions[i].callback(val, src, dest, type);
            	}
            }
            
          });
          
          //dont care about reads here
//	              parser.on('read', function(src, dest) {
//	                console.log('Read from '+src+' to '+dest);
//	              });
		//console.log("knxfunctions.read: in callback parser at end");
    }); // groupsocketlisten parser
}; //startMonitor


/*
 *  public registerGA(groupAdresses[], callback(value))
 *  parameters
 *  	callback: function(value, src, dest, type) called when a value is sent on the bus
 *  	groupAddresses: (Array of) string(s) for group addresses
 * 
 *  
 *  
 */
var registerGA = function (groupAddresses, callback) {
	// check if the groupAddresses is an array
	if (groupAddresses.constructor.toString().indexOf("Array") > -1) {
		// handle multiple addresses
		for (var i = 0; i < groupAddresses.length; i++) {
			registerSingleGA (groupAddresses[i], callback);
		}
	} else {
		// it's only one
		registerSingleGA (groupAddresses, callback);
	}
};



module.exports.platform = KNXPlatform;
module.exports.registerGA = registerGA;
module.exports.startMonitor = startMonitor;