const _ = require('lodash');
const passport = require('passport');
const crypto = require('crypto');
const { Strategy: LocalStrategy } = require('passport-local');
const { Strategy: CustomStrategy } = require('passport-custom');

const models = require('./models');
const securityHelper = require('../helpers/security.helper');
const authService = require('../modules/auth/auth.service');
const userService = require('../modules/auth/user.service');

/**
 * Validación sobre firebase
 */
var firebase_admin = require('firebase-admin');
var serviceAccount = require('../firebase-key.json');
firebase_admin.initializeApp({
    credential: firebase_admin.credential.cert(serviceAccount),
    databaseURL: "https://app-lqdvi-v2.firebaseio.com"
});

passport.serializeUser((user, done) => {
    console.log('serializarUsuario');
    done(null, user.id);
});

passport.deserializeUser((id, done) => {
    console.log('desserializarUsuario');
    models.User.findById(id, (err, user) => {
        done(err, user);
    });
});

/**
 * Sign in using Email and Password.
 */
const localEmailOptions = {
    usernameField: 'email',
    passwordField: 'password',
}

passport.use('local-email', new LocalStrategy(localEmailOptions, async (email, password, done) => {
    try {
        let user = await authService.extraMethods.findUser({ email });
        if (_.isNull(user)) {
            return done(null, false, { message: 'User not found' })
        } else {
            var password_encoded = crypto.createHash('sha512').update(password).digest('hex');            
            const isPasswordValid = await user.comparePassword(password_encoded);
            if (!isPasswordValid) {
                return done(null, false, { message: 'Wrong Password' })
            } else {
                user = user.toJSON();
                delete user.password;
                return done(null, user, { message: 'Logged in Successfully' });
            }
        }
    } catch (error) {
        return done(error);
    }
}));


/**
 * Register using phone.
 */
const localPhoneOptions = {
    usernameField: 'phone',
    passwordField: 'fbuid',    
 }

passport.use('local-phone', new LocalStrategy(localPhoneOptions, async (phone, fbuid, done) => {
    try {
console.log('PASSPORT - local-phone');
        firebase_admin.auth().getUserByPhoneNumber(phone)
        .then(function(userRecord) {
            if (userRecord && userRecord.toJSON().uid == fbuid) {
                if (userRecord.toJSON().disabled) 
                    return done(null, false, { message: 'User disabled in fb' }) 
                else 
                    return done(null, userRecord.toJSON(), { message: 'Register user' });                    
            }
            else 
                return done(null, false, { message: 'User not validate in fb' });
        })
        .catch(function (error) {
            //Servicio firebase caido o no funciona pero devuelvo el usuario
            const user = {
                phone: phone,
                fbuid: fbuid
            };
            return done(null, user, error);
        })
    } catch (error) {
        return done(null, false, error);
    }
}));


// JWT
passport.use('jwt', new CustomStrategy(async (req, done) => {
    const token = ((req && req.headers && req.headers['x-access-token']) ? req.headers['x-access-token'] : null);
    const appVersion = ((req && req.headers && req.headers['accept-version']) ? req.headers['accept-version'] : null);   
    console.log('appVersion: ', appVersion); 

    if (!token) {
        console.error('Unauthorized. Token missing.');
        return done(null, false, { message: 'Unauthorized. Token missing.'});
    }

    const result = securityHelper.verify(token);
    //console.log('token result => ', result);
    
    if (result && result.id) {
        //recuperamos el usuario de la petición
        let user = await authService.extraMethods.findUser({ id: result.id });
        if (user) {
            user = user.toJSON();
            const result = userService._updateLastLoginAndVersionUser(user.id, appVersion);
            user.app_version = appVersion;

            delete user.password;
            console.log('Logged in Successfully');
            return done(null, user, { message: 'Logged in Successfully' });
        }
        else {
            console.error('Unauthorized. User not found.');
            return done(null, false, { message: 'Unauthorized. User not found.' });
        }            
    }
    else {        
        //console.log('Token no válido');
        console.error('Unauthorized. Invalid token.');
        return done(null, false, { message: 'Unauthorized. Invalid token.' });
    }
 
}));