var http = require("http");
var socketIo = require("socket.io");
var config = require("../config");
var listeners = require("./listeners");
var database = require("./database");
var domain = require("domain");
var utils = require("./utils");
var routing = require("./routing");

var app = http.createServer();
app.listen(config.port, config.host);
var io = socketIo.listen(app);

io.sockets.on("connection", function(socket) {
	var d = domain.create();
	d.add(socket);

	var handlers = {
		error : function(err) {
			console.error("Error! Disconnecting client.");
			console.error(err.stack);
			socket.disconnect();
		},

		setPadId : function(padId) {
			if(socket.padId != null) {
				return;
			}

			socket.padId = padId;
			listeners.addPadListener(socket);

			database.getPadData(socket.padId, _sendData.bind(null, socket, "padData"));
			_sendStreamData(socket, "view", database.getViews(socket.padId));
		},

		updateBbox : function(bbox) {
			socket.bbox = bbox;

			// TODO: Only get objects for difference to last bbox

			_sendStreamData(socket, "marker", database.getPadMarkers(socket.padId, socket.bbox));
			_sendStreamData(socket, "line", utils.filterStream(database.getPadLines(socket.padId, socket.bbox), function(line) {
				var strippedLine = routing.prepareLineForBoundingBox(line, bbox);
				if(strippedLine.actualPoints.length < 2)
					return null;
				return strippedLine;
			}));
		},

		disconnect : function() {
			if(socket.padId)
				listeners.removePadListener(socket);
		},

		editPad : function(data, callback) {
			database.updatePadData(socket.padId, data, callback);
		},

		addMarker : function(data, callback) {
			database.createMarker(socket.padId, data, callback);
		},

		editMarker : function(data, callback) {
			database.updateMarker(data.id, data, callback);
		},

		deleteMarker : function(data, callback) {
			database.deleteMarker(data.id, callback);
		},

		addLine : function(data, callback) {
			database.createLine(socket.padId, data, callback);
		},

		editLine : function(data, callback) {
			database.updateLine(data.id, data, callback);
		},

		deleteLine : function(data, callback) {
			database.deleteLine(data.id, callback);
		},

		addView : function(data, callback) {
			database.createView(socket.padId, data, callback);
		},

		editView : function(data, callback) {
			database.updateView(data.id, data, callback);
		},

		deleteView : function(data, callback) {
			database.deleteView(data.id, callback);
		}
	};

	for(var i in handlers)
		socket.on(i, handlers[i]);
});

function _sendData(socket, eventName, err, data) {
	if(err) {
		console.warn(err, err.stack);
		return socket.emit("error", err);
	}

	socket.emit(eventName, data);
}

function _sendStreamData(socket, eventName, stream) {
	stream.on("data", function(data) {
		if(data != null)
			socket.emit(eventName, data);
	}).on("error", function(err) {
		console.warn(err, err.stack);
		socket.emit("error", err);
	})
}