import { authGuard } from '../authGuard.js'
import { verifyPassword } from '../helpers/pwd.js'

export const mappings = [
    { method: 'get',    url:'/checkauth',       handler: 'checkauth',     middlewares: []},
    { method: 'post',   url:'/login',           handler: 'login',         middlewares: []},
    { method: 'get',    url:'/logout',          handler: 'logout',        middlewares: []},
    { method: 'get',    url:'/preferences',     handler: 'getPrefs',      middlewares: [authGuard]},
    { method: 'put',    url:'/preferences',     handler: 'setPrefs',      middlewares: [authGuard]},
]

export const methods = {
    async checkauth(req, res) {
        if(req.session.userInfos && req.session.authenticated && req.session.userInfos && req.session.userInfos.identity && req.session.userInfos.identity.username) {
            this.ok(req, res, {
                authenticated: true,
                userInfos: req.session.userInfos,
                trials: 3,
                locked: false,
            })
        } else {
            let trials = 3
            let locked = false
            if(req.session.userInfos && req.session.userInfos.identity && req.session.userInfos.identity.username) {
                const results = await this.db.execute('SELECT usr_trials, usr_locked FROM users WHERE usr_name = ?', [req.session.userInfos.identity.username])
                if(results.length==1){
                    trials = results[0].usr_trials
                    locked = results[0].usr_locked
                }
            }
            this.ok(req, res, {
                authenticated: false,
                userInfos: null,
                trials: trials,
                locked: locked,
            })
        }

    },

    async setUserLock(username, locked, trials){
        await this.db.execute('UPDATE users SET usr_locked=?, usr_trials=? WHERE usr_name = ?', [locked, trials, username])
    },

    async login(req, res) {
        let [isValid, payload, errors] = this.utils.validateMapObject(req.body, {
            username: ((val, obj) => (typeof(val)=='string') && (val.length>0) && (/^\w+$/.test(val))),
            passwd: ((val, obj) => (typeof(val)=='string') && (val.length>0) ),
        },{ 
            'username': 'username',
            'passwd': 'passwd',
        })
        
        if((!isValid)){
            this.err(req, res, `Invalid request`, `Invalid login payload:: ${errors}`, 401)
            return
        }

        const results = await this.db.execute('SELECT * FROM users WHERE usr_name = ?', [payload.username])
        let pwdCheck = false
        let userLocked = false
        let trials = 3
        if(results.length==1){
            userLocked = results[0].usr_locked
            trials = results[0].usr_trials
            if(userLocked) {
                this.ok(req, res, {
                    authenticated: false,
                    userInfos: null,
                    trials: 0,
                    locked: true,
                })
                return
            }
        }
        
        if(results.length>0) pwdCheck = await verifyPassword(payload.passwd, results[0].usr_pwd) 
        if(pwdCheck){
            req.session.userInfos = {
                identity:{
                    username: payload.username,
                    uuid: results[0].usr_uuid,
                },
                roles: ['admin'],
            }
            req.session.authenticated = true

            await this.setUserLock(payload.username, false, 3)
            this.ok(req, res, {
                authenticated: true,
                userInfos: req.session.userInfos,
                trials: 3,
                locked: false,
            })
        } else {
            let newtrials = (trials>0) ? trials-1 : 0
            if(newtrials == 0){
                await this.setUserLock(payload.username, true, 0)
                this.ok(req, res, {
                    authenticated: false,
                    userInfos: null,
                    trials: 0,
                    locked: true,
                })
                return            
            } else {
                await this.setUserLock(payload.username, false, newtrials)
            }

            req.session.authenticated = false
            req.session.userInfos = null
            this.ok(req, res, {
                authenticated: false,
                userInfos: null,
                trials: newtrials,
                locked: false,
            })            
        }
    },
    
    async logout(req, res) {
        if(req.session.userInfos && req.session.authenticated) {
            req.session.authenticated = false
            this.ok(req, res, {
                authenticated: false,
                userInfos: null,
                trials: 3,
                locked: false,
            })
        } 

    },

    async getPrefs(req, res) {
        const results = await this.db.execute(`
            SELECT * FROM preferences
            LEFT JOIN users ON prf_usr_id=usr_id
            WHERE usr_uuid = ?
        `, [req.session.userInfos.identity.uuid])
        let prefs = {}
        if(results.length){ prefs = results[0].prf_value }
        this.ok(req, res, prefs)        
    },


    async setPrefs(req, res) {
        const results = await this.db.execute(`
            INSERT INTO preferences (prf_usr_id, prf_value)
            SELECT usr_id, ?
            FROM users 
            WHERE usr_uuid =  ?
            ON DUPLICATE KEY UPDATE prf_value = ?
        `, [req.body, req.session.userInfos.identity.uuid, req.body])
        this.ok(req, res, {})
    },
}