var LNVue = (function (){
    let _unique = new Date().getTime();
    function uniqueID(){
        return _unique++;    
    }

    let currentPromises = {};

    /*\
    |*|
    |*|  Base64 / binary data / UTF-8 strings utilities (#1)
    |*|
    |*|  https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding
    |*|
    |*|  Author: madmurphy
    |*|
    \*/
    
    /* Array of bytes to base64 string decoding */
    
    function b64ToUint6 (nChr) {
    
      return nChr > 64 && nChr < 91 ?
          nChr - 65
        : nChr > 96 && nChr < 123 ?
          nChr - 71
        : nChr > 47 && nChr < 58 ?
          nChr + 4
        : nChr === 43 ?
          62
        : nChr === 47 ?
          63
        :
          0;
    
    }
    
    function base64DecToArr (sBase64, nBlockSize) {
    
      var
        sB64Enc = sBase64.replace(/[^A-Za-z0-9\+\/]/g, ""), nInLen = sB64Enc.length,
        nOutLen = nBlockSize ? Math.ceil((nInLen * 3 + 1 >>> 2) / nBlockSize) * nBlockSize : nInLen * 3 + 1 >>> 2, aBytes = new Uint8Array(nOutLen);
    
      for (var nMod3, nMod4, nUint24 = 0, nOutIdx = 0, nInIdx = 0; nInIdx < nInLen; nInIdx++) {
        nMod4 = nInIdx & 3;
        nUint24 |= b64ToUint6(sB64Enc.charCodeAt(nInIdx)) << 18 - 6 * nMod4;
        if (nMod4 === 3 || nInLen - nInIdx === 1) {
          for (nMod3 = 0; nMod3 < 3 && nOutIdx < nOutLen; nMod3++, nOutIdx++) {
            aBytes[nOutIdx] = nUint24 >>> (16 >>> nMod3 & 24) & 255;
          }
          nUint24 = 0;
        }
      }
    
      return aBytes;
    }
    
    /* Base64 string to array encoding */
    
    function uint6ToB64 (nUint6) {
    
      return nUint6 < 26 ?
          nUint6 + 65
        : nUint6 < 52 ?
          nUint6 + 71
        : nUint6 < 62 ?
          nUint6 - 4
        : nUint6 === 62 ?
          43
        : nUint6 === 63 ?
          47
        :
          65;
    
    }
    
    function base64EncArr (aBytes) {
    
      var eqLen = (3 - (aBytes.length % 3)) % 3, sB64Enc = "";
    
      for (var nMod3, nLen = aBytes.length, nUint24 = 0, nIdx = 0; nIdx < nLen; nIdx++) {
        nMod3 = nIdx % 3;
        /* Uncomment the following line in order to split the output in lines 76-character long: */
        /*
        if (nIdx > 0 && (nIdx * 4 / 3) % 76 === 0) { sB64Enc += "\r\n"; }
        */
        nUint24 |= aBytes[nIdx] << (16 >>> nMod3 & 24);
        if (nMod3 === 2 || aBytes.length - nIdx === 1) {
          sB64Enc += String.fromCharCode(uint6ToB64(nUint24 >>> 18 & 63), uint6ToB64(nUint24 >>> 12 & 63), uint6ToB64(nUint24 >>> 6 & 63), uint6ToB64(nUint24 & 63));
          nUint24 = 0;
        }
      }
    
      return  eqLen === 0 ?
          sB64Enc
        :
          sB64Enc.substring(0, sB64Enc.length - eqLen) + (eqLen === 1 ? "=" : "==");
    
    }







    class LNVuePromise
    {
        constructor(label,executor){
            this.promise = new Promise(
                (resolve,reject) => {
                    executor(
                        (v) => {
                            this._s.state = "ready";
                            resolve(v);
                            this.release();
                        },
                        (e) => {
                            this._s.state = "failed";
                            reject(e);
                            this.release();
                        }
                    );
                }
            );

            if (!label)
                label = "N.D.";

            this._s = {
                label,
                state: "waiting"
            };

            this.idx = uniqueID();

            currentPromises[this.idx] = this._s;
        }

        label(){
            return this._s.label;
        }

        state(){
            return this._s.state;
        }

        release(){
            setTimeout(()=>{
                Vue.delete(currentPromises, this.idx);
            },1000);
        }

        then(){
            return this.promise.then.apply(this.promise, arguments);
        }
    }

    class LNVueWebSocket
    {
        constructor(lnvue,o){
            this.LNVue = lnvue;
            this.options = Object.assign({},o);
            
            if (!this.options.url)
                this.options.url = this.constructURL();

            this._id = 1;
            this.defaultTimeout = 30000;
            this.websocket = null;
            this.callbacks = {};

            this._state = "initialized";
            this._retry = null;

            this.closing = false;
        }

        constructURL(){
            var pageURI = window.location;

            var scheme = pageURI.scheme == "https" ? "wss:" : "ws:";
            var host   = pageURI.host;

            return scheme + "//" + host + "/socket";
        }

        open(){
            if (this._retry){
                clearTimeout(this._retry);
            }
            this.closing = false;

            this.websocket = new WebSocket(this.options.url);
            this.websocket.onopen = (e) =>{ console.log("WebSocket connected"); this._state = "ONLINE"; };
            this.websocket.onclose = (e)=>{ this._onclose(e); this._state = "OFFLINE"; };
            this.websocket.onerror = (e)=>{ this._onerror(e); this._state = "ERROR"; };
            this.websocket.onmessage = (e)=>{ this._onmessage(e); };
            return this;
        }

        close(){
            if (this.websocket){
                this.closing = true;
                this.websocket.close(200,"close() called");
            }
        }

        request(msgtype,msg,timeout){
            let message = {
                id: this._id++,
                type: msgtype,
                message: msg,
            }

            if (!timeout)
                timeout = this.defaultTimeout;

            if (timeout != -1){
                return new Promise((resolve,reject)=>{
                    let to = setTimeout(()=>{
                        delete this.callbacks[message.id];
                        reject("timed out");
                    },timeout);

                    this.callbacks[message.id] = (msgtype,msg)=>{
                        clearTimeout(to);
                        delete this.callbacks[message.id];
                        if (msgtype == "error")
                            reject(msg);
                        else
                            resolve({type: msgtype,message: msg});
                    };

                    this.websocket.send(
                        JSON.stringify(message)
                    );    
                });
            } else {
                new Promise((resolve,reject)=>{
                    this.websocket.send(
                        JSON.stringify(message)
                    );
                    resolve();
                });
            }

        }


        _onclose(evt){
            this.websocket = null;
            this.options.onclose && this.options.onclose(evt);
            if (!this.closing)
            {
                this._retry = setTimeout(() => {
                    this._retry = null;
                    console.log("reconnect...")
                    this.open();
                }, 5000);    
            }
        }
        _onerror(evt){
            this.options.onerror && this.options.onerror(evt);
        }
        _onmessage(evt){
            try
            {
                let j = JSON.parse(evt.data);
                let cb = this.callbacks[ j.id ];
                cb && cb(j.type,j.message);
            } catch(exc){
                console.log(exc,evt.data);
            }

        }
    }

    class LNVue
    {
        constructor(el,options = {}){
            this.options = Object.assign({
                routes: [],
                data: {},
            }, options );

            this._el = el;
            this.data = Object.assign({}, options.data, { LNVue: this, msg: "Hello World" });
            this.promises = [];

            this.globals = {
                currentPromises,
            };

            this.statusText = "LNVue preparing";

            Vue.prototype.$LNVue = this;
            LNVue.$_ = this;

            this.navigation = {};
            this.identity = {
                UniqueID: null,
                IdentityName: "",
            };

            Promise
            .all(LNVue.promises)
            .then(()=>{
                this.status("LNVue: starting");

                LNVue.vueRouter.addRoutes([{
                        path: "*",
                        component: {
                            template: `<h2>404 Not Found</h2>The URL you tried to reach is not existing.`,
                        },
                    }]);
            },
            (cause)=>{
                this.status("LNVue: start failed: " + cause);
            });

            this.vue = null;
        }

        Start(){
            Promise
            .all(this.promises)
            .then(()=>{
                LNVue.onidle(()=>{
                    this.vue = new Vue({
                        el: this._el,
                        data: this.data,
                        router: LNVue.vueRouter,
                        });
                });
            });
            LNVue.onidle(()=>{
                this.socket = new LNVueWebSocket(this);
                this.socket.open();
            });

        }



        Version(){ return "0.2alpha"; };
        getCurrentPromises() {
            return this.globals.currentPromises;
        }

        status(){
            if (arguments.length == 1){
                this.statusText = arguments[0];
                return this;
            } else if (arguments.length == 0){
                return this.statusText;
            } else 
                throw "LNVue.status(): too many arguments";
        }

        addModule(modSpec){
            if (modSpec.navigation instanceof Object){
                LNVue.deepAssign(modSpec.navigation,this.navigation);
            }

            LNVue.$each(modSpec.routes,(key,route)=>{
                if ((route instanceof Object) && route.url)
                {
                    let p = LNVue.LNPromise( "addModule()", (resolve,reject)=>{
                        LNVue
                        .fetch(route.url)
                        .then((src)=>{
                            this.addRoute(key,{ template: src, data: ()=>{ return this.data; }, });
                            resolve();
                        },
                        (cause)=>{
                            console.log("loading route.url failed: ",cause);
                        });
                    });
                    this.promises.push(p);
                } else if (route instanceof Object){
                    this.addRoute(key,{ template: route.template, data: ()=>{ return this.data; }, } );
                } else {
                    this.addRoute(key,{ template: route, data: ()=>{ return this.data; }, } );
                }
            });
        }

        addRoute(path,component){
            let self = this;
            LNVue.vueRouter.addRoutes([
                { path, component, },
            ]);
        }

        /* Authentication API */

        requestChallenges(identityName,secureAttributeTypeName){
            return new Promise((resolve,reject)=>{
                this.socket.request("AuthenticationRequest",{
                    IdentityName: identityName,
                    SecureAttributeTypeName: secureAttributeTypeName,
                })
                .then((challenges)=>{
                    resolve(challenges);
                },
                (error)=>{
                    console.log("Login challenges could not be retrieved", error);
                }
                );    
            });
        }

        authenticate(identityName,secureAttributeID,challenge,prove){
            let authenticationProve = {
                IdentityName: identityName,
                SecureAttributeUniqueID: secureAttributeID,
                Challenge: challenge,
                Prove: prove,
            };
            console.log(authenticationProve);
            this.socket.request("AuthenticationProve", authenticationProve)
            .then((identity)=>{
                this.identity = identity.message;
            },
            (error)=>{
                this.identity = {
                    IdentityName: "",
                    UniqueID: null,
                }
                console.log("auth error",error);
            });
        }




    }

    Object.defineProperty( LNVue, '$LNVue', {
        get: ()=>{ return LNVue.$_; },
    });

    LNVue.vueRouter = new VueRouter({
        mode: 'history',
        routes: [],
    });

    LNVue.$idles = [];
    LNVue.onidle = function(cb,thisval = null){
        let scheduled = LNVue.$idles.length > 0;
        let n=0;
        
        for (;n<LNVue.$idles.length;n++){
            let idle = LNVue.$idles[n];
            if ((idle[0] == cb) && (idle[1] == thisval))
                break;
        }
        if (n == LNVue.$idles.length)
            LNVue.$idles.push([cb,thisval]);

        if (!scheduled)
            setTimeout(()=>{
                while (LNVue.$idles.length > 0){
                    let idle = LNVue.$idles.pop();
                    idle[0].call(idle[1]);
                }
            },0);
    }

    LNVue.$each = function(oa,cb){
        if (oa instanceof Array){
            let result = [];
            oa.forEach((value,index)=>{
                result.push(cb.call(value,index,value));
            });
            return result;
        } else if (oa instanceof Object){
            let result = {};
            Object.keys(oa).forEach((key)=>{
                if (oa.hasOwnProperty(key)){
                    result[key] = cb.call(oa[key],key,oa[key]);
                }
            });
            return result;
        }
    }

    LNVue.deepAssign = function(source,target){
        LNVue.$each(source,function(key){
            if (target[key] instanceof Object){
                LNVue.deepAssign(src[key],target[key]);
            } else {
                target[key] = source[key];
            }
        });
    }

    LNVue.$ = function(src){
        let el = document.createElement("parse");
        el.innerHTML = src;
        return el.firstChild;
    }

    LNVue.routes = [];
    LNVue.promises = [];

    LNVue.fetch = function(url,cb){
        return LNVue.LNPromise("loading",(resolve,reject)=>{
            fetch(url)
            .then((response => {
                if (response.status.toString().startsWith("2"))
                {
                    let t = response.text();
                    cb && cb(t,null);
                    resolve(t);
                } else {
                    cb && cb(null, response.statusText);
                    reject(response.statusText);
                }
            }));
        });
    }

    LNVue.each = function(o,cb){
            if (o instanceof Array)
                o.forEach((value,index)=> cb(value,index) );
            else
                Object.keys(o).forEach((key)=>{
                    if (o.hasOwnProperty(key))
                        cb(o[key],key);
                });
        };

    LNVue.LNPromise = function(label, action){
        console.log(label,action);
        return new LNVuePromise(label, action);
    }

    LNVue.encodeB64 = base64EncArr;
    LNVue.decodeB64 = base64DecToArr;

    LNVue.encodeHex = (bytes) => bytes.reduce((str, byte) => str + byte.toString(16).padStart(2, '0'), '');
    LNVue.decodeHex = (hexString) => new Uint8Array(hexString.match(/.{1,2}/g).map(byte => parseInt(byte, 16)));
    
    ArrayBuffer.combine = function(...args){
        let byteLength = 0;
        args.forEach((arg,index)=>{
            byteLength = byteLength + arg.byteLength;
        });

        let result = new Uint8Array(byteLength);
        let p = 0;
        args.forEach((arg,index)=>{
            for (let n=0;n<arg.byteLength;n++)
            {
                result[p++] = arg[n];
            }
        });
        console.log("combine",new Uint8Array(result));
        return result.buffer
    };

    LNVue.prototypes = {};
    LNVue.prototypes.LNVuePromise = LNVuePromise;

    return LNVue;
})();