'use strict'

var express = require('express')
var router = express.Router()
const Promise = require('bluebird')
const validator = require('validator')
const _ = require('lodash')

/**
 * Admin
 */
router.get('/', (req, res) => {
  res.redirect('/admin/profile')
})

router.get('/profile', (req, res) => {
  if (res.locals.isGuest) {
    return res.render('error-forbidden')
  }

  res.render('pages/admin/profile', { adminTab: 'profile' })
})

router.post('/profile', (req, res) => {
  if (res.locals.isGuest) {
    return res.render('error-forbidden')
  }

  return db.User.findById(req.user.id).then((usr) => {
    usr.name = _.trim(req.body.name)
    if (usr.provider === 'local' && req.body.password !== '********') {
      let nPwd = _.trim(req.body.password)
      if (nPwd.length < 6) {
        return Promise.reject(new Error('New Password too short!'))
      } else {
        return db.User.hashPassword(nPwd).then((pwd) => {
          usr.password = pwd
          return usr.save()
        })
      }
    } else {
      return usr.save()
    }
  }).then(() => {
    return res.json({ msg: 'OK' })
  }).catch((err) => {
    res.status(400).json({ msg: err.message })
  })
})

router.get('/stats', (req, res) => {
  if (res.locals.isGuest) {
    return res.render('error-forbidden')
  }

  Promise.all([
    db.Entry.count(),
    db.UplFile.count(),
    db.User.count()
  ]).spread((totalEntries, totalUploads, totalUsers) => {
    return res.render('pages/admin/stats', {
      totalEntries, totalUploads, totalUsers, adminTab: 'stats'
    }) || true
  }).catch((err) => {
    throw err
  })
})

router.get('/users', (req, res) => {
  if (!res.locals.rights.manage) {
    return res.render('error-forbidden')
  }

  db.User.find({})
    .select('-password -rights')
    .sort('name email')
    .exec().then((usrs) => {
      res.render('pages/admin/users', { adminTab: 'users', usrs })
    })
})

router.get('/users/:id', (req, res) => {
  if (!res.locals.rights.manage) {
    return res.render('error-forbidden')
  }

  if (!validator.isMongoId(req.params.id)) {
    return res.render('error-forbidden')
  }

  db.User.findById(req.params.id)
    .select('-password -providerId')
    .exec().then((usr) => {
      let usrOpts = {
        canChangeEmail: (usr.email !== 'guest' && usr.provider === 'local' && usr.email !== req.app.locals.appconfig.admin),
        canChangeName: (usr.email !== 'guest'),
        canChangePassword: (usr.email !== 'guest' && usr.provider === 'local'),
        canChangeRole: (usr.email !== 'guest' && !(usr.provider === 'local' && usr.email === req.app.locals.appconfig.admin)),
        canBeDeleted: (usr.email !== 'guest' && !(usr.provider === 'local' && usr.email === req.app.locals.appconfig.admin))
      }

      res.render('pages/admin/users-edit', { adminTab: 'users', usr, usrOpts })
    })
})

router.post('/users/:id', (req, res) => {
  if (!res.locals.rights.manage) {
    return res.status(401).json({ msg: 'Unauthorized' })
  }

  if (!validator.isMongoId(req.params.id)) {
    return res.status(400).json({ msg: 'Invalid User ID' })
  }

  return db.User.findById(req.params.id).then((usr) => {
    usr.name = _.trim(req.body.name)
    usr.rights = JSON.parse(req.body.rights)
    if (usr.provider === 'local' && req.body.password !== '********') {
      let nPwd = _.trim(req.body.password)
      if (nPwd.length < 6) {
        return Promise.reject(new Error('New Password too short!'))
      } else {
        return db.User.hashPassword(nPwd).then((pwd) => {
          usr.password = pwd
          return usr.save()
        })
      }
    } else {
      return usr.save()
    }
  }).then(() => {
    return res.json({ msg: 'OK' })
  }).catch((err) => {
    res.status(400).json({ msg: err.message })
  })
})

router.get('/settings', (req, res) => {
  if (!res.locals.rights.manage) {
    return res.render('error-forbidden')
  }

  res.render('pages/admin/settings', { adminTab: 'settings' })
})

module.exports = router