const { authenticate } = require('@feathersjs/authentication').hooks
const { checkDir, checkName } = require('../../../util/checkDirParts')
const { disable, invalid, adminOnly } = require('../hooksUtil')
const getUrl = require('../../../util/getUrl')
const nameIsValid = name => {
  name = checkName(name)
  if (!name) return invalid('name')
  if (name.substr(name.length - 3).toLowerCase() !== '.md') {
    name += '.md'
  }
  return name
}
const dirIsValid = dir => {
  dir = checkDir(dir)
  if (!dir && dir !== 0) return invalid('dir')
  else if (dir === 0) return ''
  return dir
}
const mdIsValid = md => {
  if (typeof md !== 'string' || md.trim().length === 0) {
    return invalid('md')
  }
  return md
}
const pathTaken = async (name, dir, app) => {
  const matches = await app
    .service(getUrl('docs'))
    .find({ query: { name, dir } })
  if (matches.total > 0) {
    return invalid(null, 'filename is taken')
  }
}
module.exports = {
  before: {
    all: [authenticate('jwt')],
    find: [],
    get: [],
    create: [
      async ctx => {
        const { app, data } = ctx
        let { name, dir, md } = data
        const k = {}
        k.name = nameIsValid(name)
        k.dir = dirIsValid(dir)
        k.md = mdIsValid(md)
        await pathTaken(k.name, k.dir, app)
        ctx.data = k
        return ctx
      },
    ],
    update: [disable],
    patch: [
      async ctx => {
        const { data, app } = ctx
        const { name, dir, md } = data
        const k = {}
        if (name) k.name = nameIsValid(name)
        if (typeof dir === 'string') k.dir = dirIsValid(dir) // allow empty string
        if (name || typeof dir === 'string') {
          let checkName, checkDir
          if (!name || typeof dir !== 'string') {
            const doc = await app.service(getUrl('docs')).get(ctx.id)
            if (!name) checkName = doc.name
            if (typeof dir !== 'string') checkDir = doc.dir
          }
          await pathTaken(
            k.name || checkName,
            typeof k.dir === 'string' ? k.dir : checkDir,
            app
          )
        }
        if (md) k.md = mdIsValid(md)
        if (Object.keys(k).length === 0) invalid(null, 'nothing to update')
        ctx.data = k
        return ctx
      },
    ],
    remove: [adminOnly],
  },

  after: {
    all: [],
    find: [],
    get: [],
    create: [],
    update: [],
    patch: [],
    remove: [],
  },

  error: {
    all: [],
    find: [],
    get: [],
    create: [],
    update: [],
    patch: [],
    remove: [],
  },
}