(function (){

    let exModule = {
        label: 'Example Module',
        routes: [
            {
                path: '/about',
                template: `This is about this example!`,
            }
        ],
        navigation: {
            '99': {
                label: 'About',
                href: '/about'
            } 
        }



    };

    let defaultOptions = {
        element: 'body',
        modules: [ exModule, ],
    };

    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.statusText = "LNVue preparing";

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

            this.navigation = {};
            this.identity = new LN.Identity();

            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;

            LNVue.$instance.resolve(this);
        }

        Start(){
            Promise
            .all(this.promises)
            .then(()=>{
                LN.$idle(()=>{
                    this.vue = new Vue({
                        el: this._el,
                        data: this.data,
                        router: LNVue.vueRouter,
                        });
                });
            });
            LN.$idle(()=>{
                this.socket = new LN.Vue.WebSocket(this);
                this.socket.open();
            });
            LN.$idle(()=>{
                LNVue.$start.resolve(this);
            });
        }

        storage(){
            return window.localStorage;
        }

        sessionID(){
            if (arguments.length == 1){
                this.storage().setItem("LNVueSessionID",arguments[0]);
                console.log("LNVue.SID <= " + arguments[0]);
                return this;
            } else
            {
                let sid = this.storage().getItem("LNVueSessionID");
                console.log("LNVue.SID == " + sid);
                if (!sid)
                {
                    sid = "00000000-0000-0000-0000-000000000000";
                }
                return sid;
            }
        }

        Version(){ return "0.2alpha"; };
        getCurrentPromises() {
            return LN.Promise.getCurrentPromises();
        }

        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);
            }

            LN.$each(modSpec.routes,(key,route)=>{
                if ((route instanceof Object) && route.url)
                {
                    let p = new LN.Promise((resolve,reject)=>{
                        LN.$fetch(route.url)
                        .then((src)=>{
                            this.addRoute(key,{ template: src, data: ()=>{ return this.data; }, });
                            resolve();
                        },
                        (cause)=>{
                            console.log("loading route.url failed: ",cause);
                        });
                    },`addModule(${route.url})`);
                    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){
            LNVue.vueRouter.addRoutes([
                { path, component, },
            ]);

            if (this.vue){
                let route = this.vue.$route;
                LNVue.vueRouter.replace("/");
                LNVue.vueRouter.replace(route);
            }
        }

        /* 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,
            };
            this.socket.request("AuthenticationProve", authenticationProve)
            .then((identity)=>{
                this.identity = new LN.Identity(identity.message);
            },
            (error)=>{
                this.identity = new LN.Identity();
            });
        }

        rpc(moduleName,methodName,parameters){
            return new Promise((resolve,reject)=>{
                let rpcCall = {
                    module: moduleName,
                    method: methodName,
                    parameters: parameters
                };
                this.socket.request("RPCCall",rpcCall)
                .then(
                    (result)=>{
                        if (result.message.error)
                        {
                            console.log("rpc call failed", result.message.error);
                            reject(result.message.error);
                        }
                        else
                            resolve(result.message.Result);
                    },
                    (error)=>{
                        console.log("rpc failed", error);
                        reject(error);
                    }
                );
            });
        }

        static $LNVue(){
            return LNVue.$_;
        }
    }
    LNVue.$instance = new LN.Promise(()=>{},'LN.Vue Instance Promise');
    LNVue.$start = new LN.Promise(()=>{},'LN Vue Startup Promise');



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

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

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

    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
    };

    LN.$add("LN.Vue",LNVue);
    LN.$add("LNVue",LNVue);
})();