const express = require('express')
const app = express()
const cache = require('./src/cache')
const con = require('./src/console')


const auth = require('./src/api/auth')
const pages = require('./src/api/pages')
const posts = require('./src/api/posts')
const users = require('./src/api/users')


app.set('trust proxy', true)
app.use(express.static('public'))
app.use(require('cookie-parser')())
app.use(express.json());


app.use((req, res, next) => {

    var ip = req.headers['x-real-ip'] || req.socket.remoteAddress;

    if (req.path !== '/console') {

        let body = { ...req.body }

        if (body.password !== undefined) {
            body.password = '********'
        }

        con.log(
            ip, 
            req.method, 
            req.path, 
            body 
        )

    }

    next()
})


app.use((req, res, next) => {

    if (req.path.startsWith('/api/auth')) {
        next()
        return
    }

    const cookies = req.cookies

    if (cookies === undefined || cookies.auth === undefined) {
        
        if (req.method !== 'GET' && req.path.startsWith('/api')) {
            res.status(401).send({msg: 'Unauthorized'})
            return
        }
        
        next()
        return
    }

    const user = cache.auth(req.cookies.auth)

    if (user !== undefined) {

        res.locals.user = user

    } else if (req.method !== 'GET' && req.path.startsWith('/api')) {

        res.status(401).send({msg: 'Unauthorized'})
        return

    }

    next()

})


app.use('/api/auth', auth)
app.use('/api/posts', posts)
app.use('/api/users', users)
app.use('/', pages)


app.get('/console', (req, res) => {
    res.send(con.render())
})


app.use((req, res, next) => {
    res.status(404).sendFile('404.html', { root: './public' })
})


app.use((err, req, res, next) => {

    if (err instanceof SyntaxError && err.status === 400 && 'body' in err) {
        res.status(400).send({ msg: 'Invalid json body' })
        return
    }

    console.error(err)
    res.status(500).send({ msg: 'Internal server error' })
})


const cron = require('node-cron').schedule('*/5 * * * *', () => {
    con.msg('Writing cache to database')
    cache.dump()
})


const port = 8080
const server = app.listen(port, () => {
    console.log(`App listening on port http://127.0.0.1:${port}`)
})


const close = () => {
    console.log('Writing cache to database')
    cache.dump()
    console.log('Stopping cron jobs')
    cron.stop()
    server.close(() => {
        console.log('HTTP server closed')
    })
}


process.on('SIGINT', close)
process.on('SIGTERM', close)
process.on('SIGQUIT', close)