/* eslint-disable
    handle-callback-err
*/
const sinon = require('sinon')
const { expect } = require('chai')
const SandboxedModule = require('sandboxed-module')
const modulePath = require('path').join(
  __dirname,
  '../../../app/js/SpellingAPIManager'
)

const promiseStub = val => new Promise(resolve => resolve(val))

describe('SpellingAPIManager', function () {
  beforeEach(function () {
    this.token = 'user-id-123'
    this.ASpell = {}
    this.SpellingAPIManager = SandboxedModule.require(modulePath, {
      requires: {
        './ASpell': this.ASpell,
        '@overleaf/settings': { ignoredMisspellings: ['ShareLaTeX'] },
      },
    })
  })

  describe('runRequest', function () {
    beforeEach(function () {
      this.nonLearnedWords = ['some', 'words', 'htat', 'are', 'speled', 'rong']
      this.allWords = this.nonLearnedWords
      this.misspellings = [
        { index: 2, suggestions: ['that'] },
        { index: 4, suggestions: ['spelled'] },
        { index: 5, suggestions: ['wrong', 'ring'] },
      ]
      this.misspellingsWithoutLearnedWords = this.misspellings.slice(0, 3)

      this.ASpell.checkWords = (lang, word, callback) => {
        callback(null, this.misspellings)
      }
      this.ASpell.promises = {
        checkWords: sinon.stub().returns(promiseStub(this.misspellings)),
      }
      sinon.spy(this.ASpell, 'checkWords')
    })

    describe('with sensible JSON', function () {
      beforeEach(function (done) {
        this.SpellingAPIManager.runRequest(
          this.token,
          { words: this.allWords },
          (error, result) => {
            if (error) return done(error)
            this.result = result
            done()
          }
        )
      })

      it('should return the words that are spelled incorrectly and not learned', function () {
        expect(this.result.misspellings).to.deep.equal(
          this.misspellingsWithoutLearnedWords
        )
      })
    })

    describe('with a missing words array', function () {
      beforeEach(function (done) {
        this.SpellingAPIManager.runRequest(this.token, {}, (error, result) => {
          this.error = error
          this.result = result
          done()
        })
      })

      it('should return an error', function () {
        expect(this.error).to.exist
        expect(this.error).to.be.instanceof(Error)
        expect(this.error.message).to.equal('malformed JSON')
      })
    })

    describe('without a language', function () {
      beforeEach(function (done) {
        this.SpellingAPIManager.runRequest(
          this.token,
          { words: this.allWords },
          (error, result) => {
            if (error) return done(error)
            this.result = result
            done()
          }
        )
      })

      it('should use en as the default', function () {
        this.ASpell.promises.checkWords.calledWith('en').should.equal(true)
      })
    })

    describe('with a language', function () {
      beforeEach(function (done) {
        this.language = 'fr'
        this.SpellingAPIManager.runRequest(
          this.token,
          {
            words: this.allWords,
            language: this.language,
          },
          (error, result) => {
            if (error) return done(error)
            this.result = result
            done()
          }
        )
      })

      it('should use the language', function () {
        this.ASpell.promises.checkWords
          .calledWith(this.language)
          .should.equal(true)
      })
    })
  })
})