import bodyParser = require('body-parser');
import { bold } from 'chalk';
import * as cors from 'cors';
import { config as dconfig } from 'dotenv';
import * as express from 'express';
import * as figlet from 'figlet';
import * as mongoose from 'mongoose';
import { exit } from 'process';
import * as winston from 'winston';
import { config } from './config';
import { GetBeat, GetBeatStats } from './endpoints/beat';
import { getNotification } from './endpoints/notification';
import { GetPhone, PostPhone } from './endpoints/phone';
import { DeleteUser, GetUser, LoginUser, MW_User, PatchUser, PostUser, UserEvents } from './endpoints/user';
import { hashPassword, randomPepper, randomString } from './lib/crypto';
import { EventManager } from './lib/eventManager';
import { RabbitMQ } from './lib/rabbit';
import { UserType } from './models/user/user.interface';
import { User } from './models/user/user.model';

// Load .env
dconfig({ debug: true, encoding: 'UTF-8' });

export const MONGO_URI = process.env.MONGO_URI || "";
export const RABBITMQ_URI = process.env.RABBITMQ_URI || "";
export const JWT_SECRET = process.env.JWT_SECRET || "";
export const IS_DEBUG = process.env.DEBUG == 'true';

export let logger: winston.Logger;
export let rabbitmq: RabbitMQ;
export let eventManager: EventManager = new EventManager();

async function run() {
    const { combine, timestamp, label, printf, prettyPrint } = winston.format;

    const myFormat = printf(({ level, message, label, timestamp }) => {
        return `${timestamp} ${level} ${message}`;
    });

    /**
     * Printing starting screen
     */
    console.log(figlet.textSync('Livebeat', {
        font: 'Doom'
    }));
    console.log(`Starting up version ${bold("1.0.0")} of Livebeat ...
============================================`)

    /**
     * Setting up logger
     */
    logger = winston.createLogger({
        level: IS_DEBUG ? 'debug' : 'info',
        levels: winston.config.syslog.levels,
        format: combine(
            timestamp(),
            prettyPrint(),
            myFormat
        ),
        defaultMeta: { },
        transports: [
            new winston.transports.File({ filename: 'error.log', level: 'error' }),
            new winston.transports.File({ filename: 'combined.log' })
        ]
    });

    // Adding seperate logger for files (with color)
    logger.add(new winston.transports.Console({
        format: combine(
            winston.format.colorize({ level: true }),
            timestamp(),
            prettyPrint(),
            myFormat
        )
    }));
    

    logger.info("Logger started");

    if (IS_DEBUG) {
        logger.info("Debug mode is enabled. Do not use this in production!")
    }

    if (JWT_SECRET == "") {
        logger.crit("No JWT secret was provided. Make sure you add JWT_SECRET=YOUR_SECRET to your .env file.");
        exit(1);
    }

    if (RABBITMQ_URI == "") {
        logger.crit("No RabbitMQ URI was provided. Make sure you add RABBITMQ_URI=YOUR_URL to your .env file.");
        exit(1);
    }

    /**
     * Database connection
     */
    //mongoose.set('debug', true);
    const connection = await mongoose.connect(MONGO_URI, { useNewUrlParser: true, useUnifiedTopology: true }).catch((err) => {
        logger.crit("Database connection could not be made: ", err);
        exit(1);
    });
    logger.info(`Database connection made to ${mongoose.connection.host}`);

    // Check if admin account doesn't exists
    if((await User.countDocuments({ type: UserType.ADMIN })) == 0) {
        const randomPassword = "$1" + randomString(12);
        const salt = randomString(config.authentification.salt_length);

        await User.create({
            name: 'admin',
            password: await hashPassword(randomPassword + salt + randomPepper()),
            eventToken: randomString(16),
            salt,
            createdAt: Date.now(),
            lastLogin: 0,
            type: UserType.ADMIN
        });
        logger.info("===================================================");
        logger.info("ADMIN USER HAS BEEN CREATED! Username: admin\tPassword: " + randomPassword);
        logger.info("===================================================");
    } else {
        logger.debug("At least one admin user already exists, skip.");
    }

    /**
     * HTTP server
     */
    const app = express();
    app.use(express.json());
    app.use(cors());
    app.use(bodyParser.json({ limit: '5kb' }));

    app.use((req, res, next) => {
        res.on('finish', () => {
            const done = Date.now();
            logger.debug(`${req.method} - ${req.url} ${JSON.stringify(req.body)} -> ${res.statusCode}`);
        });
        next();
    });

    app.get('/', (req, res) => res.status(200).send('OK'));

    // User authentication & actions
    app.post('/user/login', (req, res) => LoginUser(req, res));

    // CRUD user
    app.get('/user/notification', MW_User, (req, res) => getNotification(req, res));    // Notifications
    app.get('/user/events', (req, res) => UserEvents(req, res));
    app.get('/user/', MW_User, (req, res) => GetUser(req, res));
    app.post('/user/', MW_User, (req, res) => PostUser(req, res));
    app.get('/user/:id', MW_User, (req, res) => GetUser(req, res));
    app.patch('/user/:id', MW_User, (req, res) => PatchUser(req, res));
    app.delete('/user/:id', MW_User, (req, res) => DeleteUser(req, res));

    // Phones
    app.get('/phone/:id', MW_User, (req, res) => GetPhone(req, res));
    app.get('/phone', MW_User, (req, res) => GetPhone(req, res));
    app.post('/phone', MW_User, (req, res) => PostPhone(req, res));

    // Beats
    app.get('/beat/', MW_User, (req, res) => GetBeat(req, res));
    app.get('/beat/stats', MW_User, (req, res) => GetBeatStats(req, res));

    app.listen(config.http.port, config.http.host, () => {
        logger.info(`HTTP server is running at ${config.http.host}:${config.http.port}`);
    });

    /**
     * Message broker
     */
    rabbitmq = new RabbitMQ();
    //await rabbitmq.init();
    //logger.info("Connected with message broker.");
}

run();