import fs from 'fs'
import { SHA256 } from '../../extra_modules/SHA.js'
import { unsign } from '../../extra_modules/unsign.js'
const config = JSON.parse(fs.readFileSync('server_config.json'))
const HASHES_DB = config.cookies.server_hashes
const HASHES_COOKIE = config.cookies.client_hashes
const HASHES_DIFF = HASHES_DB - HASHES_COOKIE

export const setup = function (router, con, server) {
    router.use('/*path', (req, res, next) => {
        res.set('Access-Control-Allow-Origin', '*') //we'll allow it for now
        let unsigned

        req.body = req.body || {}

        if (typeof req.get('ipost-auth-token') === 'string') {
            try {
                req.body.auth = JSON.parse(req.get('ipost-auth-token'))
            } catch (err) {
                console.log('error parsing header', err)
            }
        }
        if (
            req.body.auth !== undefined &&
            req.originalUrl !== '/redeemauthcode'
        ) {
            if (typeof req.body.auth === 'string') {
                try {
                    req.body.auth = JSON.parse(req.body.auth)
                } catch (err) {
                    console.log('error parsing', err)
                }
            } else if (
                typeof req.body.auth !== 'object' ||
                typeof req.body.auth.secret !== 'string' ||
                typeof req.body.auth.appid !== 'number' ||
                typeof req.body.auth.auth_token !== 'string' ||
                req.body.auth.secret.length !== 200 ||
                req.body.auth.auth_token.length !== 200 ||
                Buffer.from(req.body.auth.secret, 'base64').length !== 150
            ) {
                res.status(420).send('invalid authentication object')
                return
            } else {
                //secret    : string(200 chars)
                //appid     : number
                //auth_token: string(200 chars)
                let sql =
                    'select User_ID,User_Name,User_Bio,User_Avatar,User_Settings from ipost.auth_tokens inner join ipost.application on auth_token_isfrom_application_id=application_id inner join ipost.users on auth_token_u_id=User_ID where auth_token=? and application_secret=? and application_id=?'
                con.query(
                    sql,
                    [
                        SHA256(
                            req.body.auth.auth_token,
                            req.body.auth.appid,
                            HASHES_DB
                        ),
                        SHA256(
                            req.body.auth.secret,
                            req.body.auth.appid,
                            HASHES_DB
                        ),
                        req.body.auth.appid,
                    ],
                    (err, result) => {
                        if (err) throw err

                        if (result.length !== 1) {
                            res.status(420).send(
                                'invalid authentication object (or server error?)'
                            )
                            return
                        }

                        res.locals.userid = result[0].User_ID
                        res.locals.username = result[0].User_Name
                        res.locals.bio = result[0].User_Bio || ''
                        res.locals.avatar = result[0].User_Avatar || ''
                        res.locals.settings = result[0].User_Settings || {}

                        res.locals.isbot = true //only apps/bots use auth tokens

                        next()
                    }
                )
                return
            }
        } else {
            if (!req.cookies.AUTH_COOKIE) {
                next()
                return
            }
            unsigned = unsign(req.cookies.AUTH_COOKIE, req, res)
            if (!unsigned) {
                next()
                return
            }
        }
        let sql = `select User_ID,User_Name,User_Bio,User_Avatar,User_Settings from ipost.users where User_Name=? and User_PW=?;`
        let values = unsigned.split(' ')
        values[1] = SHA256(values[1], values[0], HASHES_DIFF)
        res.locals.bio = ''
        res.locals.avatar = ''
        res.locals.settings = {}
        con.query(sql, values, function (err, result) {
            if (err) throw err
            if (
                result[0] &&
                result[0].User_Name &&
                result[0].User_Name === values[0]
            ) {
                res.locals.userid = result[0].User_ID
                res.locals.username = result[0].User_Name
                res.locals.bio = result[0].User_Bio || ''
                res.locals.avatar = result[0].User_Avatar || ''
                res.locals.settings = result[0].User_Settings || {}
            }
            next()
        })
    })

    router.use('/api/*path', (req, res, next) => {
        res.set('Access-Control-Allow-Origin', '*') //we'll allow it for now
        if (
            config['allow_getotheruser_without_cookie'] &&
            req.originalUrl.split('\?')[0] === '/api/getotheruser'
        ) {
            next()
            return
        }
        if (!server.increaseAPICall(req, res)) return

        if (res.locals.username !== undefined) {
            next()
        } else {
            res.status(402)
            res.json({
                error: 'you cannot access the api without being logged in',
            })
        }
        /* #swagger.security = [{
               "appTokenAuthHeader": []
        }] */
    })
}
export default {
    setup,
}