var hmd = require('node-hmd');

var manager = hmd.createManager("oculusrift");

manager.getDeviceInfo(function(err, deviceInfo) {
    if(!err) {
        console.log(deviceInfo);
    }
    else {
        console.error("Unable to retrieve device information.");
    }
});

manager.getDeviceOrientation(function(err, deviceOrientation) {
    if(!err) {
        console.log(deviceOrientation);
    }
    else {
        console.error("Unable to retrieve device orientation.");
    }
});

{ CameraFrustumFarZInMeters: 2.5,
  CameraFrustumHFovInRadians: 1.29154372215271,
  CameraFrustumNearZInMeters: 0.4000000059604645,
  CameraFrustumVFovInRadians: 0.942477822303772,
  DefaultEyeFov:
   [ { RightTan: 1.0923680067062378,
       LeftTan: 1.0586576461791992,
       DownTan: 1.3292863368988037,
       UpTan: 1.3292863368988037 },
     { RightTan: 1.0586576461791992,
       LeftTan: 1.0923680067062378,
       DownTan: 1.3292863368988037,
       UpTan: 1.3292863368988037 } ],
  DisplayDeviceName: '',
  DisplayId: 880804035,
  DistortionCaps: 66027,
  EyeRenderOrder: [ 1, 0 ],
  ...

var hmd = require("node-hmd"),
    express = require("express"),
    http = require("http").createServer(),
    WebSocketServer = require('ws').Server,
    path = require('path');

// Create HMD manager object
console.info("Attempting to load node-hmd driver: oculusrift");
var manager = hmd.createManager("oculusrift");
if (typeof(manager) === "undefined") {
    console.error("Unable to load driver: oculusrift");
    process.exit(1);
}
// Instantiate express server
var app = express();
app.set('port', process.env.PORT || 3000);

app.use(express.static(path.join(__dirname + '/', 'public')));
app.set('views', path.join(__dirname + '/public/', 'views'));
app.set('view engine', 'jade');

app.get('/demo', function (req, res) {
    'use strict';
    res.render('demo', {
        title: 'Home'
    });
});

// Attach socket.io listener to the server
var wss = new WebSocketServer({server: http});
var id = 1;

wss.on('open', function open() {
    console.log('connected');
});

// On socket connection set up event emitters to automatically push the HMD orientation data
wss.on("connection", function (ws) {
    function emitOrientation() {
        id = id + 1;
        var deviceQuat = manager.getDeviceQuatSync();
        var devicePosition = manager.getDevicePositionSync();

        var data = JSON.stringify({
            id: id,
            quat: deviceQuat,
            position: devicePosition
        });

        ws.send(data, function (error) {
            //it's a bug of websocket, see in https://github.com/websockets/ws/issues/337
        });
    }

    var orientation = setInterval(emitOrientation, 1000);

    ws.on("message", function (data) {
        clearInterval(orientation);
        orientation = setInterval(emitOrientation, data);
    });

    ws.on("close", function () {
        setTimeout(null, 500);
        clearInterval(orientation);
        console.log("disconnect");
    });
});

// Launch express server
http.on('request', app);
http.listen(3000, function () {
    console.log("Express server listening on port 3000");
});

var data = JSON.stringify({
    id: id,
    quat: deviceQuat,
    position: devicePosition
});

ws.send(data, function (error) {
    //it's a bug of websocket, see in https://github.com/websockets/ws/issues/337
});

{
    "position": {
        "x": 0.020077044144272804,
        "y": -0.0040545957162976265,
        "z": 0.16216422617435455
    },
    "quat": {
        "w": 0.10187230259180069,
        "x": -0.02359195239841938,
        "y": -0.99427556991577148,
        "z": -0.021934293210506439
    }
}

this.headPos.set(sensorData.position.x * 10 - 0.4, sensorData.position.y * 10 + 1.75, sensorData.position.z * 10 + 10);
this.headQuat.set(sensorData.quat.x, sensorData.quat.y, sensorData.quat.z, sensorData.quat.w);

this.camera.setRotationFromQuaternion(this.headQuat);
this.controller.setRotationFromMatrix(this.camera.matrix);

/*
 Copyright 2014 Lars Ivar Hatledal
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 http://www.apache.org/licenses/LICENSE-2.0
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

THREE.DK2Controls = function (camera) {

    this.camera = camera;
    this.ws;
    this.sensorData;
    this.lastId = -1;

    this.controller = new THREE.Object3D();

    this.headPos = new THREE.Vector3();
    this.headQuat = new THREE.Quaternion();

    var that = this;
    var ws = new WebSocket("ws://localhost:3000/");
    ws.onopen = function () {
        console.log("### Connected ####");
    };

    ws.onmessage = function (evt) {
        var message = evt.data;
        try {
            that.sensorData = JSON.parse(message);
        } catch (err) {
            console.log(message);
        }
    };

    ws.onclose = function () {
        console.log("### Closed ####");
    };

    this.update = function () {

        var sensorData = this.sensorData;
        if (sensorData) {
            var id = sensorData.id;
            if (id > this.lastId) {
                this.headPos.set(sensorData.position.x * 10 - 0.4, sensorData.position.y * 10 + 1.75, sensorData.position.z * 10 + 10);
                this.headQuat.set(sensorData.quat.x, sensorData.quat.y, sensorData.quat.z, sensorData.quat.w);

                this.camera.setRotationFromQuaternion(this.headQuat);
                this.controller.setRotationFromMatrix(this.camera.matrix);
            }
            this.lastId = id;
        }


        this.camera.position.addVectors(this.controller.position, this.headPos);
        if (this.camera.position.y < -10) {
            this.camera.position.y = -10;
        }

        if (ws) {
            if (ws.readyState === 1) {
                ws.send("get\n");
            }
        }

    };
};

var oculusControl;

function init() {
        ...
	oculusControl = new THREE.DK2Controls( camera );
	...
}

function animate() {
    requestAnimationFrame( animate );
    render();
    stats.update();
}
function render() {
    oculusControl.update( clock.getDelta() );
    THREE.AnimationHandler.update( clock.getDelta() * 100 );

    camera.useQuaternion = true;
    camera.matrixWorldNeedsUpdate = true;

    effect.render(scene, camera);
}

this.onKeyDown = function (event) {
    switch (event.keyCode) {
        case 87: //W
            this.wasd.up = true;
            break;
        case 83: //S
            this.wasd.down = true;
            break;
        case 68: //D
            this.wasd.right = true;
            break;
        case 65: //A
            this.wasd.left = true;
            break;
    }
};

this.onKeyUp = function (event) {
    switch (event.keyCode) {
        case 87: //W
            this.wasd.up = false;
            break;
        case 83: //S
            this.wasd.down = false;
            break;
        case 68: //D
            this.wasd.right = false;
            break;
        case 65: //A
            this.wasd.left = false;
            break;
    }
};

if (this.wasd.up) {
    this.controller.translateZ(-this.translationSpeed * delta);
}

if (this.wasd.down) {
    this.controller.translateZ(this.translationSpeed * delta);
}

if (this.wasd.right) {
    this.controller.translateX(this.translationSpeed * delta);
}

if (this.wasd.left) {
    this.controller.translateX(-this.translationSpeed * delta);
}

this.camera.position.addVectors(this.controller.position, this.headPos);

if (this.camera.position.y < -10) {
    this.camera.position.y = -10;
}