/*
The MIT License (MIT)
Copyright (c) 2014-2018 Nikolai Suslov and the Krestianstvo.org project contributors. (https://github.com/NikolaySuslov/livecodingspace/blob/master/LICENSE.md)

Virtual World Framework Apache 2.0 license  (https://github.com/NikolaySuslov/livecodingspace/blob/master/licenses/LICENSE_VWF.md)
*/

class Helpers {

    constructor() {
        //console.log("helpers constructor");
        // List of valid ID characters for use in an instance.
        this.ValidIDChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
        // List of valid extensions for VWF components.
        this.template_extensions = ["", ".yaml", ".json"];
        this.applicationRoot = "/"; //app
    }


   log(o) {
        if(typeof o === "object" && "_" in o) {
          const obj = {...o};
          delete obj._;
          return console.log(obj);
        }
        return console.log(o);
      }

    reduceSaveObject(path) {
        let obj = Object.assign({}, path);

        if (path.saveObject) {
            if (path.saveObject["queue"]) {
                if (path.saveObject["queue"]["time"]) {
                    obj.saveObject = {
                        "init": true,
                        "queue": {
                            "time": path.saveObject["queue"]["time"]
                        }
                    }
                }
            }
        }

        return obj
    }

    // IsInstanceID tests if the passed in potential Instance ID 
    // is a valid instance id.
    IsInstanceID(potentialInstanceID) {
        if (potentialInstanceID.match(/^[0-9A-Za-z]{16}$/)) {
            return true;
        }
        return false;
    }

    // GenerateInstanceID function creates a randomly generated instance ID.
    GenerateInstanceID() {
        var text = "";

        for (var i = 0; i < 16; i++)
            text += this.ValidIDChars.charAt(Math.floor(Math.random() * this.ValidIDChars.length));

        return text;
    }

    // JoinPath
    // Takes multiple arguments, joins them together into one path.
    JoinPath( /* arguments */) {
        var result = "";
        if (arguments.length > 0) {
            if (arguments[0]) {
                result = arguments[0];
            }
            for (var index = 1; index < arguments.length; index++) {
                var newSegment = arguments[index];
                if (newSegment == undefined) {
                    newSegment = "";
                }

                if ((newSegment[0] == "/") && (result[result.length - 1] == "/")) {
                    result = result + newSegment.slice(1);
                } else if ((newSegment[0] == "/") || (result[result.length - 1] == "/")) {
                    result = result + newSegment;
                } else {
                    result = result + "/" + newSegment;
                }
                //result = libpath.join( result, newSegment );
            }
        }
        return result;
    }

    GetNamespace(processedURL) {
        if ((processedURL['instance']) && (processedURL['public_path'])) {
            return this.JoinPath(processedURL['public_path'], processedURL['application'], processedURL['instance']);
        }
        return undefined;
    }



    // GenerateSegments takes a string, breaks it into
    // '/' separated segments, and removes potential
    // blank first and last segments. 
    GenerateSegments(argument) {
        var result = argument.split("/");
        if (result.length > 0) {
            if (result[0] == "") {
                result.shift();
            }
        }
        if (result.length > 0) {
            if (result[result.length - 1] == "") {
                result.pop();
            }
        }
        return result;
    }

    getInstanceID(obj) {

        // "/world/index.vwf/CcI3c1MnTsblg3H7"
        return obj.split('/')[3]

    }

    get appPath() {
        return JSON.parse(localStorage.getItem('lcs_app')).path.public_path.slice(1)
    }

    get worldStateName() {

        let appConfig = JSON.parse(localStorage.getItem('lcs_app'));

        var saveName = appConfig.path.public_path.slice(1);
        let privatePath = appConfig.path.private_path;
        if (privatePath) {
            if (privatePath.indexOf('load') !== -1) {
                saveName = privatePath.split('/')[1];
            }
        }

        return saveName

    }

    getRoot() {

        let data = JSON.parse(localStorage.getItem('lcs_app'));

        return {
            "root": data.path.public_path.slice(1),
            "inst": data.path.instance,
            "user": data.user
        }
    }


    get worldUser() {
        return this.getRoot(false).root.split('/')[0];
    }


    randId() {
        return '_' + Math.random().toString(36).substr(2, 9);
    }

    getRandomInt(min, max) {
        min = Math.ceil(min);
        max = Math.floor(max);
        return Math.floor(Math.random() * (max - min)) + min; //The maximum is exclusive and the minimum is inclusive
    }


    GUID() {
        var S4 = function () {
            return Math.floor(
                Math.random() * 0x10000 /* 65536 */
            ).toString(16);
        };

        return (
            S4() + S4() + "-" +
            S4() + "-" +
            S4() + "-" +
            S4() + "-" +
            S4() + S4() + S4()
        );
    }

    async sha256(message) {

        // encode as UTF-8
        const msgBuffer = new TextEncoder('utf-8').encode(message);

        // hash the message
        const hashBuffer = await crypto.subtle.digest('SHA-256', msgBuffer);

        // convert ArrayBuffer to Array
        const hashArray = Array.from(new Uint8Array(hashBuffer));

        // convert bytes to hex string
        const hashHex = hashArray.map(b => ('00' + b.toString(16)).slice(-2)).join('');
        return hashHex;
    }

    replaceSubStringALL(target, search, replacement) {
        return target.split(search).join(replacement);
    };


    convertFileSource(file, source) {
        //var source = (typeof(sourceToEdit) =="object") ? JSON.stringify(sourceToEdit): sourceToEdit;
        var convert;
        if (file.includes('_json') && (typeof source !== 'object')) {
            convert = (typeof JSON.parse(source) == 'object') ? JSON.stringify(JSON.parse(source), null, '\t') : source
            //source = source;//JSON.stringify(source, null, '\t');
        } else if (typeof source == 'object') {
            convert = JSON.stringify(source, null, '\t')
        } else if (typeof source == 'string') {
            convert = source
        }

        return convert
    }


    async getHtmlText(url) {

        let file = await fetch(url, { method: 'get' });
        let text = await file.text();
        return text
    }

    removePatches(obj) {

        let rm = L.lazy(rec =>
            L.ifElse(R.is(String),
                L.when(x => x == 'patches'), [L.keysEverywhere, rec], L.optional)
        );  //x == 'id' ||  

        return L.remove(rm, obj)
    };

    replacePatchesWithIds(obj) {

        let rm = L.lazy(rec =>
            L.ifElse(R.is(String),
                L.when(x => x == 'patches'), [L.keysEverywhere, rec], L.optional)
        );
        return L.modify(rm, (k) => 'id', obj)
    };


    removeProps(obj) {

        let rm = L.lazy(rec =>
            L.ifElse(R.is(String),
                L.when(x => x == 'random' || x == 'sequence' || x === 'id' || x === 'patches' || x === 'childrenDeleted'), [L.keysEverywhere, rec], L.optional)
        );

        return L.remove(rm, obj)

        // Object.keys(obj).forEach(key =>
        //     (key === 'id' || key === 'patches' || key === 'random' || key === 'sequence') && delete obj[key] ||
        //     (obj[key] && typeof obj[key] === 'object') && this.removeProps(obj[key])
        // );
        //return obj;
    };

    removeGrammarObj(obj) {

        let rm = L.lazy(rec =>
            L.ifElse(R.is(String),
                L.when(x => x == 'grammar'
                    || x == 'semantics'), [L.keysEverywhere, rec], L.optional)
        );

        return L.remove(rm, obj)

        // Object.keys(obj).forEach(key =>
        //     (key === 'grammar' || key === 'semantics') && delete obj[key] ||
        //     (obj[key] && typeof obj[key] === 'object') && this.removeGrammarObj(obj[key])
        // );
        // return obj;
    };


    collectMethods(obj) {

        let files = {};

        Object.keys(obj.children).forEach(childName => {

            let child = obj.children[childName];
            if (child.scritps && child.methods)
                files[childName] = "";
            let methods = child.methods;
            Object.keys(methods).forEach(el => {
                let method = methods[el];
                if (method.body) {
                    let params = method.parameters ? method.parameters.toString() : '';
                    let funDef = "this." + el + ' = function(' + params + ') { \n' + method.body + '\n' + '}';
                    files[childName] = files[childName].concat('\n').concat(funDef);
                }
            })
        })
        return files
    }

    getNodeJSProps(nodeID) {
        let node = vwf.models.javascript.nodes[nodeID]
        return node
    }

    getWorldProto() {

        let worldID = vwf.application();
        let nodeDef = this.getNodeDef(worldID);

        const rm = L.lazy(rec =>
            L.ifElse(R.is(String), L.when(x => x.includes('avatar-') || x.includes('xcontroller-') || x.includes('gearvr-')), [L.keys, rec], L.optional)
        )

        let fixedDef = L.remove(['children', L.props(rm)], nodeDef)

        return fixedDef
    }

    getNodeDef(nodeID) {
        let node = vwf.getNode(nodeID, true);
        let nodeDefPure = this.removeProps(node);
        let nodeDef = this.removeGrammarObj(nodeDefPure);
        let finalDef = this.replaceFloatArraysInNodeDef(nodeDef);

        return finalDef
        // if(param == 'withID'){
        //     return this.replacePatchesWithIds(finalDef);
        // }
       
        // return this.removePatches(finalDef)
    }

    replaceFloatArraysInNodeDef(state) {

        var objectIsTypedArray = function (candidate) {
            var typedArrayTypes = [
                Int8Array,
                Uint8Array,
                // Uint8ClampedArray,
                Int16Array,
                Uint16Array,
                Int32Array,
                Uint32Array,
                Float32Array,
                Float64Array
            ];

            var isTypedArray = false;

            if (typeof candidate == "object" && candidate != null) {
                typedArrayTypes.forEach(function (typedArrayType) {
                    isTypedArray = isTypedArray || candidate instanceof typedArrayType;
                });
            }

            return isTypedArray;
        };

        var transitTransformation = function (object) {
            return objectIsTypedArray(object) ?
                Array.prototype.slice.call(object) : object;
        };


        let value = vwf.utility.transform(
            state, transitTransformation
        );

        return value

    }

    httpGet(url) {
        return new Promise(function (resolve, reject) {
            // do the usual Http request
            let request = new XMLHttpRequest();
            request.open('GET', url);

            request.onload = function () {
                if (request.status == 200) {
                    resolve(request.response);
                } else {
                    reject(Error(request.statusText));
                }
            };

            request.onerror = function () {
                reject(Error('Network Error'));
            };

            request.send();
        });
    }

    async httpGetJson(url) {
        // check if the URL looks like a JSON file and call httpGet.
        let regex = /\.(json)$/i;

        if (regex.test(url)) {
            // call the async function, wait for the result
            return await this.httpGet(url);
        } else {
            throw Error('Bad Url Format');
        }
    }

    authUser(alias, pass) {
        let self = this;
        
        _LCSDB.user().auth(alias, pass
            , function (ack) {

                if (ack.err) {
                    self.notyErr(ack.err)

                }
            }
        );

    }

    testJSON(text) {
        if (typeof text !== "string") {
            return false;
        }
        try {
            JSON.parse(text);
            return true;
        }
        catch (error) {
            return false;
        }
    }

    async getUserPub(userName) {

        //TODO: Fix for using hashids instead users aliases with pubs sorted by time of registration
        let alias = '~@' + userName;
        let user = await (new Promise(res => _LCSDB.get(alias).once(res)));

        if (user) {

            if (Object.keys(user).length > 1) {
                let pubs = await Promise.all(Object.keys(user).filter(el => el !== '_').map(el => _LCSDB.user(el.slice(1)).then(res => {
                    let ts = Gun.state.is(res, 'pub')
                    return { pub: res.pub, time: ts }
                })))
                //console.log(pubs);
                pubs.sort(function (a, b) {
                    return new Date(b.time) - new Date(a.time);
                });

                return pubs[0].pub

            } else {
                return Object.keys(user)[1].slice(1)
            }

        }

    }

    checkUserCollision() {

        //TODO: Fix for using hashids instead users aliases with pubs sorted by time of registration

        _app.helpers.getUserPub(_LCSDB.user().is.alias).then(res => {
            if (_LCSDB.user().is.pub !== res) {
                if (window.confirm("ERROR: User name collision. Try to delete user collision?")) {
                    _LCSDB.user().delete();
                    window.reload();
                }
            }
        })

    }

    async getUserAlias(userPub) {

        let user = await (new Promise(res => _LCSDB.user(userPub).get('alias').once(res)));

        if (user)
            return user

    }

    notyOK(msg) {

        let noty = new Noty({
            text: msg,
            timeout: 2000,
            theme: 'mint',
            layout: 'bottomRight',
            type: 'success'
        });
        noty.show();
    }

    notyErr(msg) {

        let noty = new Noty({
            text: msg,
            timeout: 2000,
            theme: 'mint',
            layout: 'bottomRight',
            type: 'error'
        });
        noty.show();
    }

    remap(inMin, inMax, outMin, outMax) {
        return function remaper(x) {
            return (x - inMin) * (outMax - outMin) / (inMax - inMin) + outMin;
        }
    }

    get appPath (){
        return JSON.parse(localStorage.getItem('lcs_app')).path.public_path
    } 
    
    get appName() {
        return JSON.parse(localStorage.getItem('lcs_app')).path.application.split(".").join("_")
    } 
    
    // Changing this function significantly from the GLGE code
    // Will search hierarchy down until encountering a matching child
    // Will look into nodes that don't match.... this might not be desirable
        findChildByName(obj, childName, childType, recursive) {
                    let self = this;
                    var child = undefined;
                    if (recursive) {

                        // TODO: If the obj itself has the child name, the object will be returned by this function
                        //       I don't think this this desirable.

                        if (self.nameTest.call(this, obj, childName)) {
                            child = obj;
                        } else if (obj.children && obj.children.length > 0) {
                            for (var i = 0; i < obj.children.length && child === undefined; i++) {
                                child = FindChildByName(obj.children[i], childName, childType, true);
                            }
                        }
                    } else {
                        if (obj.children) {
                            for (var i = 0; i < obj.children.length && child === undefined; i++) {
                                if (self.nameTest.call(this, obj.children[i], childName)) {
                                    child = obj.children[i];
                                }
                            }
                        }
                    }
                    return child;

                }

        nameTest(obj, name) {
                    if (obj.name == "") {
                        return (obj.parent.name + "Child" == name);
                    } else {
                        return (obj.name == name || obj.id == name || obj.vwfID == name);
                    }
                }


}

export { Helpers }