import express from 'express'
import ExpressBrute from 'express-brute'
import BruteKnex from '../helpers/brute-knex.mjs'
import { find, isEmpty, set } from 'lodash-es'
import path from 'node:path'
import { DateTime } from 'luxon'

export default function () {
  const router = express.Router()

  const bruteforce = new ExpressBrute(new BruteKnex({
    createTable: true,
    knex: WIKI.db.knex
  }), {
    freeRetries: 5,
    minWait: 5 * 60 * 1000, // 5 minutes
    maxWait: 60 * 60 * 1000, // 1 hour
    failCallback: (req, res, next) => {
      res.status(401).send('Too many failed attempts. Try again later.')
    }
  })

  /**
   * Login form
   */
  router.get('/login', async (req, res, next) => {
    // -> Bypass Login
    if (WIKI.config.auth.autoLogin && !req.query.all) {
      const stg = await WIKI.db.authentication.query().orderBy('order').first()
      const stgInfo = find(WIKI.data.authentication, ['key', stg.strategyKey])
      if (!stgInfo.useForm) {
        return res.redirect(`/login/${stg.key}`)
      }
    }
    // -> Show Login
    res.sendFile(path.join(WIKI.ROOTPATH, 'assets/index.html'))
  })

  /**
   * Social Strategies Login
   */
  router.get('/login/:strategy', async (req, res, next) => {
    try {
      await WIKI.db.users.login({
        strategy: req.params.strategy
      }, { req, res })
    } catch (err) {
      next(err)
    }
  })

  /**
   * Social Strategies Callback
   */
  router.all('/login/:strategy/callback', async (req, res, next) => {
    if (req.method !== 'GET' && req.method !== 'POST') { return next() }

    try {
      const authResult = await WIKI.db.users.login({
        strategy: req.params.strategy
      }, { req, res })
      res.cookie('jwt', authResult.jwt, { expires: DateTime.now().plus({ years: 1 }).toJSDate() })

      const loginRedirect = req.cookies['loginRedirect']
      if (loginRedirect === '/' && authResult.redirect) {
        res.clearCookie('loginRedirect')
        res.redirect(authResult.redirect)
      } else if (loginRedirect) {
        res.clearCookie('loginRedirect')
        res.redirect(loginRedirect)
      } else if (authResult.redirect) {
        res.redirect(authResult.redirect)
      } else {
        res.redirect('/')
      }
    } catch (err) {
      next(err)
    }
  })

  /**
   * Logout
   */
  router.get('/logout', async (req, res, next) => {
    const redirURL = await WIKI.db.users.logout({ req, res })
    req.logout((err) => {
      if (err) { return next(err) }
      res.clearCookie('jwt')
      res.redirect(redirURL)
    })
  })

  /**
   * Register form
   */
  router.get('/register', async (req, res, next) => {
    set(res.locals, 'pageMeta.title', 'Register')
    const localStrg = await WIKI.db.authentication.getStrategy('local')
    if (localStrg.selfRegistration) {
      res.sendFile(path.join(WIKI.ROOTPATH, 'assets/index.html'))
    } else {
      next(new WIKI.Error.AuthRegistrationDisabled())
    }
  })

  /**
   * Verify
   */
  router.get('/verify/:token', bruteforce.prevent, async (req, res, next) => {
    try {
      const usr = await WIKI.db.userKeys.validateToken({ kind: 'verify', token: req.params.token })
      await WIKI.db.users.query().patch({ isVerified: true }).where('id', usr.id)
      req.brute.reset()
      if (WIKI.config.auth.enforce2FA) {
        res.redirect('/login')
      } else {
        const result = await WIKI.db.users.refreshToken(usr)
        res.cookie('jwt', result.token, { expires: DateTime.now().plus({ years: 1 }).toJSDate() })
        res.redirect('/')
      }
    } catch (err) {
      next(err)
    }
  })

  /**
   * Reset Password
   */
  router.get('/login-reset/:token', bruteforce.prevent, async (req, res, next) => {
    try {
      const usr = await WIKI.db.userKeys.validateToken({ kind: 'resetPwd', token: req.params.token })
      if (!usr) {
        throw new Error('Invalid Token')
      }
      req.brute.reset()

      const changePwdContinuationToken = await WIKI.db.userKeys.generateToken({
        userId: usr.id,
        kind: 'changePwd'
      })
      const bgUrl = !isEmpty(WIKI.config.auth.loginBgUrl) ? WIKI.config.auth.loginBgUrl : '/_assets/img/splash/1.jpg'
      res.render('login', { bgUrl, hideLocal: WIKI.config.auth.hideLocal, changePwdContinuationToken })
    } catch (err) {
      next(err)
    }
  })

  /**
   * JWT Public Endpoints
   */
  router.get('/.well-known/jwk.json', function (req, res, next) {
    res.json(WIKI.config.certs.jwk)
  })
  router.get('/.well-known/jwk.pem', function (req, res, next) {
    res.send(WIKI.config.certs.public)
  })

  return router
}