const mysql = require('mysql2/promise');

class P42ApiEndpoints{
    constructor(app) {
        this.db = null
        this.app = app
        this.userinfos = null
        this.registerPaths()
    }

    registerPaths(){
        this.app.get('/hw', this.hw.bind(this))
    }

    async connectDB(mysqlCreds) {
        this.db = await mysql.createConnection({
            host: mysqlCreds.host, 
            port: mysqlCreds.port, 
            socketPath: mysqlCreds.socketPath,
            database: mysqlCreds.database,
            user: mysqlCreds.user, 
            password: mysqlCreds.password
        });
        setInterval(() => {
            this.db.query('SELECT 1');
        }, 5000);
    }

    err(req, res, msg, debug, status=500) {
        if(!debug) debug = msg
        let jsonResp = {'success':false,
                        'payload': null,
                        'error': {
                            'displayMessage' : msg,
                            'debugMessage' : debug
                        } 
                    };
        res.set('Content-Type', 'application/json');
        res.status(status)
        res.send(JSON.stringify(jsonResp));
    }

    ok(req, res, payload) {
        let jsonResp = {    "success": true,
                            "payload": payload,
                        };
        res.set('Content-Type', 'application/json');
        res.send(JSON.stringify(jsonResp));
    }


    async makeSession(req, res) {
        req.session.userinfo =  req.body
        console.log('REQ body:', req.body)
        this.ok(req, res, {})
    }

    getSession(req, res) {
        this.userinfos = {
            "at_hash": "fhaNqJbWprmseino7D7vQhdEIWzlss6a08DvgY_Y7ik",
            "sub": "steinic",
            "amr": [
                "pwd"
            ],
            "iss": "https://ecas.acceptance.ec.europa.eu/cas/oauth2",

            // Impersonate here
            "preferred_username": "fallimi", //"steinic",



            "locale": "en",
            "https://ecas.ec.europa.eu/claims/domain": "eu.europa.ec",
            "acr": "https://ecas.ec.europa.eu/loa/basic",
            "auth_time": 1686415198,
            "nickname": "steinic",
            "https://ecas.ec.europa.eu/claims/teleworking_priority": false,
            "exp": 1686415501,
            "iat": 1686415201,
            "email": "Nicolas.STEIN@ext.ec.europa.eu",
            "https://ecas.ec.europa.eu/claims/employee_number": "90218167",
            "email_verified": true,
            "https://ecas.ec.europa.eu/claims/department_number": "EISMEA.C.02.2",
            "https://ecas.ec.europa.eu/claims/employee_type": "x",
            "given_name": "Nicolas",
            "https://ecas.ec.europa.eu/claims/org_id": "232619",
            "aud": "zjDAOobFg2JJzMxhzfoTyPg1BrOzPzG4EMUJOoqUbF1mYTkwddaZwL4o9YzzK3unIZAEunze7fQAfOoOgXnq9Xhr-NaAc23CqASenqizgfAeUl6",
            "c_hash": "8pzkBbmGEZW48yLZYoEoR_H3QC0GIeWYxlzUCfRMElg",
            "https://ecas.ec.europa.eu/claims/sso": false,
            "https://ecas.ec.europa.eu/claims/authentication_factors": [
                {
                    "username": "steinic"
                }
            ],
            "name": "Nicolas STEIN",
            "https://ecas.ec.europa.eu/claims/uid": "steinic",
            "family_name": "STEIN",
            "userRoles": [
                "BP_PO",
                "APPLICANT",
            ]
        }
        return(true)


        if((!req.session.userinfo) || (!req.session.userinfo.isAuthenticated)) {
            this.err(req, res, 'Not authenticated !')
            this.userinfos = null
            return(false)
        } else {
            req.session.touch()
            this.userinfos = req.session.userinfo
            return(true)
        }
    }

    hasRole(roles) {
        if(!this.userinfos.userRoles) return(false)
        if(typeof(roles) == 'string') return(this.userinfos.userRoles.includes(roles))
        else if(Array.isArray(roles)) {
            for(let role of roles) {
                if(this.userinfos.userRoles.includes(role)) return(true)
            }
        }
        return(false)
    }

    CheckMapOutput(data, remap, transformers) {
        if(!data) return(null)
        let rows = Array.isArray(data) ? data : [data]
        let filteredRows = []
        for(let row of rows) {
            let filteredRow = {}
            Object.keys(row).forEach((key, index) => {
                if(Object.keys(remap).indexOf(key)>-1) {
                    if(transformers && transformers[key] && (typeof(transformers[key])=='function')) {
                        filteredRow[remap[key]] = transformers[key](row[key]) 
                    } else filteredRow[remap[key]] = row[key] 
                }
            });
            filteredRows.push(filteredRow)
        }
        if(Array.isArray(data)) return(filteredRows)
        else return(filteredRows[0])
    }
    
    CheckMapInput(dataIn, remap, checks) {
        let dataOut = {}
        for(let field in checks) {
            let dbName = checks[field](dataIn[field])
            if(dbName && (dataIn[field]!=null)) dataOut[remap[field]] = dataIn[field]
        }
        return(dataOut)
    }

    async isMemberOf(pic) {
        let [rows, fields] = await this.db.query(`
            SELECT count(*) as cnt FROM organisation_members 
            WHERE (om_pic=?)
            AND (om_uid=?)
        `,        
        [pic, this.userinfos.preferred_username]);
        return(rows[0]['cnt']>0)
    }

    async isOrgAdminOf(pic) {
        let [rows, fields] = await this.db.query(`
            SELECT count(*) as cnt FROM organisation_members 
            WHERE (om_pic=?)
            AND (om_uid=?)
            AND om_administrator=1
        `,        
        [pic, this.userinfos.preferred_username]);
        return(rows[0]['cnt']>0)
    }

    async isPropAdminOf(pid) {
        let [rows, fields] = await this.db.query(`
            SELECT count(*) as cnt FROM shortprops_members 
            WHERE (spm_prop_id=?)
            AND (spm_uid=?)
            AND spm_administrator=1
        `,        
        [pid, this.userinfos.preferred_username]);
        return(rows[0]['cnt']>0)
    }

    async isPropMemberOf(pid) {
        let [rows, fields] = await this.db.query(`
            SELECT count(*) as cnt FROM shortprops_members 
            WHERE (spm_prop_id=?)
            AND (spm_uid=?)
        `,        
        [pid, this.userinfos.preferred_username]);
        return(rows[0]['cnt']>0)
    }


    async merge(table, where, whereVals, data) {
        let [rows, field] = await this.db.query(`SELECT * FROM ${table} WHERE ${where}`, whereVals)
        if(rows.length==0) return(data)
        else return(Object.assign(rows[0], data))
    }

///////////////////////////API starts here.../////////////////////////////
    async hw(req, res) {
        this.ok(req, res, {hello:'world'})
    }
    
}
module.exports = P42ApiEndpoints;