/* eslint-disable
    node/handle-callback-err,
    max-len,
    no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS101: Remove unnecessary use of Array.from
 * DS102: Remove unnecessary code created because of implicit returns
 * DS205: Consider reworking code to avoid use of IIFEs
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
let ClsiStateManager
const Settings = require('@overleaf/settings')
const logger = require('@overleaf/logger')
const crypto = require('crypto')
const ProjectEntityHandler = require('../Project/ProjectEntityHandler')

// The "state" of a project is a hash of the relevant attributes in the
// project object in this case we only need the rootFolder.
//
// The idea is that it will change if any doc or file is
// created/renamed/deleted, and also if the content of any file (not
// doc) changes.
//
// When the hash changes the full set of files on the CLSI will need to
// be updated.  If it doesn't change then we can overwrite changed docs
// in place on the clsi, getting them from the docupdater.
//
// The docupdater is responsible for setting the key in redis, and
// unsetting it if it removes any documents from the doc updater.

const buildState = s =>
  crypto.createHash('sha1').update(s, 'utf8').digest('hex')

module.exports = ClsiStateManager = {
  computeHash(project, options, callback) {
    if (callback == null) {
      callback = function () {}
    }
    return ProjectEntityHandler.getAllEntitiesFromProject(
      project,
      function (err, docs, files) {
        const fileList = Array.from(files || []).map(
          f => `${f.file._id}:${f.file.rev}:${f.file.created}:${f.path}`
        )
        const docList = Array.from(docs || []).map(
          d => `${d.doc._id}:${d.path}`
        )
        const sortedEntityList = [
          ...Array.from(docList),
          ...Array.from(fileList),
        ].sort()
        // ignore the isAutoCompile options as it doesn't affect the
        // output, but include all other options e.g. draft
        const optionsList = (() => {
          const result = []
          const object = options || {}
          for (const key in object) {
            const value = object[key]
            if (!['isAutoCompile'].includes(key)) {
              result.push(`option ${key}:${value}`)
            }
          }
          return result
        })()
        const sortedOptionsList = optionsList.sort()
        const hash = buildState(
          [
            ...Array.from(sortedEntityList),
            ...Array.from(sortedOptionsList),
          ].join('\n')
        )
        return callback(null, hash)
      }
    )
  },
}