const sinon = require('sinon')
const SandboxedModule = require('sandboxed-module')
const path = require('path')
const { ObjectId } = require('mongodb-legacy')
const modulePath = path.join(
  __dirname,
  '../../../../app/src/Features/DocumentUpdater/DocumentUpdaterHandler'
)

describe('DocumentUpdaterHandler', function () {
  beforeEach(function () {
    this.project_id = 'project-id-923'
    this.projectHistoryId = 'ol-project-id-1'
    this.doc_id = 'doc-id-394'
    this.lines = ['one', 'two', 'three']
    this.version = 42
    this.user_id = 'mock-user-id-123'
    this.project = { _id: this.project_id }

    this.request = sinon.stub()
    this.projectEntityHandler = {}
    this.settings = {
      apis: {
        documentupdater: {
          url: 'http://document_updater.example.com',
        },
        project_history: {
          url: 'http://project_history.example.com',
        },
      },
      moduleImportSequence: [],
    }
    this.source = 'dropbox'

    this.callback = sinon.stub()
    this.handler = SandboxedModule.require(modulePath, {
      requires: {
        request: {
          defaults: () => {
            return this.request
          },
        },
        '@overleaf/settings': this.settings,
        '../Project/ProjectEntityHandler': this.projectEntityHandler,
        '../../models/Project': {
          Project: (this.Project = {}),
        },
        '../Project/ProjectGetter': (this.ProjectGetter = {
          getProjectWithoutLock: sinon.stub(),
        }),
        '../../Features/Project/ProjectLocator': {},
        '@overleaf/metrics': {
          Timer: class {
            done() {}
          },
        },
        '../FileStore/FileStoreHandler': {
          _buildUrl: sinon.stub().callsFake((projectId, fileId) => {
            return `http://filestore/project/${projectId}/file/${fileId}`
          }),
        },
      },
    })
    this.ProjectGetter.getProjectWithoutLock
      .withArgs(this.project_id)
      .yields(null, this.project)
  })

  describe('flushProjectToMongo', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 204 }, '')
        this.handler.flushProjectToMongo(this.project_id, this.callback)
      })

      it('should flush the document from the document updater', function () {
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/flush`,
            method: 'POST',
          })
          .should.equal(true)
      })

      it('should call the callback with no error', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.flushProjectToMongo(this.project_id, this.callback)
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.flushProjectToMongo(this.project_id, this.callback)
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('flushProjectToMongoAndDelete', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 204 }, '')
        this.handler.flushProjectToMongoAndDelete(
          this.project_id,
          this.callback
        )
      })

      it('should delete the project from the document updater', function () {
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}`,
            method: 'DELETE',
          })
          .should.equal(true)
      })

      it('should call the callback with no error', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.flushProjectToMongoAndDelete(
          this.project_id,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.flushProjectToMongoAndDelete(
          this.project_id,
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('flushDocToMongo', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 204 }, '')
        this.handler.flushDocToMongo(
          this.project_id,
          this.doc_id,
          this.callback
        )
      })

      it('should flush the document from the document updater', function () {
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}/flush`,
            method: 'POST',
          })
          .should.equal(true)
      })

      it('should call the callback with no error', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.flushDocToMongo(
          this.project_id,
          this.doc_id,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.flushDocToMongo(
          this.project_id,
          this.doc_id,
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('deleteDoc', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 204 }, '')
        this.handler.deleteDoc(this.project_id, this.doc_id, this.callback)
      })

      it('should delete the document from the document updater', function () {
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}`,
            method: 'DELETE',
          })
          .should.equal(true)
      })

      it('should call the callback with no error', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.deleteDoc(this.project_id, this.doc_id, this.callback)
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.deleteDoc(this.project_id, this.doc_id, this.callback)
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })

    describe("with 'ignoreFlushErrors' option", function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 204 }, '')
      })

      it('when option is true, should send a `ignore_flush_errors=true` URL query to document-updater', function () {
        this.handler.deleteDoc(
          this.project_id,
          this.doc_id,
          true,
          this.callback
        )
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}?ignore_flush_errors=true`,
            method: 'DELETE',
          })
          .should.equal(true)
      })

      it("when option is false, shouldn't send any URL query to document-updater", function () {
        this.handler.deleteDoc(
          this.project_id,
          this.doc_id,
          false,
          this.callback
        )
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}`,
            method: 'DELETE',
          })
          .should.equal(true)
      })
    })
  })

  describe('setDocument', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 204 }, '')
        this.handler.setDocument(
          this.project_id,
          this.doc_id,
          this.user_id,
          this.lines,
          this.source,
          this.callback
        )
      })

      it('should set the document in the document updater', function () {
        this.request
          .calledWith({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}`,
            json: {
              lines: this.lines,
              source: this.source,
              user_id: this.user_id,
            },
            method: 'POST',
            timeout: 30 * 1000,
          })
          .should.equal(true)
      })

      it('should call the callback with no error', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.setDocument(
          this.project_id,
          this.doc_id,
          this.user_id,
          this.lines,
          this.source,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.setDocument(
          this.project_id,
          this.doc_id,
          this.user_id,
          this.lines,
          this.source,
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('getComment', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.comment = {
          id: 'mock-comment-id-1',
        }
        this.body = this.comment
        this.request.callsArgWith(1, null, { statusCode: 200 }, this.body)
        this.handler.getComment(
          this.project_id,
          this.doc_id,
          this.comment.id,
          this.callback
        )
      })

      it('should get the comment from the document updater', function () {
        const url = `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}/comment/${this.comment.id}`
        this.request
          .calledWith({
            url,
            method: 'GET',
            json: true,
            timeout: 30 * 1000,
          })
          .should.equal(true)
      })

      it('should call the callback with the comment', function () {
        this.callback.calledWithExactly(null, this.comment).should.equal(true)
      })
    })
  })

  describe('getDocument', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.body = {
          lines: this.lines,
          version: this.version,
          ops: (this.ops = ['mock-op-1', 'mock-op-2']),
          ranges: (this.ranges = { mock: 'ranges' }),
        }
        this.fromVersion = 2
        this.request.callsArgWith(1, null, { statusCode: 200 }, this.body)
        this.handler.getDocument(
          this.project_id,
          this.doc_id,
          this.fromVersion,
          this.callback
        )
      })

      it('should get the document from the document updater', function () {
        this.request
          .calledWith({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}?fromVersion=${this.fromVersion}`,
            method: 'GET',
            json: true,
            timeout: 30 * 1000,
          })
          .should.equal(true)
      })

      it('should call the callback with the lines and version', function () {
        this.callback
          .calledWith(null, this.lines, this.version, this.ranges, this.ops)
          .should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.getDocument(
          this.project_id,
          this.doc_id,
          this.fromVersion,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.getDocument(
          this.project_id,
          this.doc_id,
          this.fromVersion,
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('getProjectDocsIfMatch', function () {
    beforeEach(function () {
      this.project_state_hash = '1234567890abcdef'
    })

    describe('successfully', function () {
      beforeEach(function () {
        this.doc0 = {
          _id: this.doc_id,
          lines: this.lines,
          v: this.version,
        }
        this.docs = [this.doc0, this.doc0, this.doc0]
        this.body = JSON.stringify(this.docs)
        this.request.post = sinon
          .stub()
          .callsArgWith(1, null, { statusCode: 200 }, this.body)
        this.handler.getProjectDocsIfMatch(
          this.project_id,
          this.project_state_hash,
          this.callback
        )
      })

      it('should get the documents from the document updater', function () {
        const url = `${this.settings.apis.documentupdater.url}/project/${this.project_id}/get_and_flush_if_old?state=${this.project_state_hash}`
        this.request.post.calledWith(url).should.equal(true)
      })

      it('should call the callback with the documents', function () {
        this.callback.calledWithExactly(null, this.docs).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.post = sinon
          .stub()
          .callsArgWith(1, new Error('something went wrong'), null, null)
        this.handler.getProjectDocsIfMatch(
          this.project_id,
          this.project_state_hash,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a conflict error code', function () {
      beforeEach(function () {
        this.request.post = sinon
          .stub()
          .callsArgWith(1, null, { statusCode: 409 }, 'Conflict')
        this.handler.getProjectDocsIfMatch(
          this.project_id,
          this.project_state_hash,
          this.callback
        )
      })

      it('should return the callback with no documents', function () {
        this.callback.alwaysCalledWithExactly().should.equal(true)
      })
    })
  })

  describe('clearProjectState', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 200 })
        this.handler.clearProjectState(this.project_id, this.callback)
      })

      it('should clear the project state from the document updater', function () {
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/clearState`,
            method: 'POST',
          })
          .should.equal(true)
      })

      it('should call the callback', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.clearProjectState(this.project_id, this.callback)
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns an error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, null)
        this.handler.clearProjectState(this.project_id, this.callback)
      })

      it('should return the callback with no documents', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('acceptChanges', function () {
    beforeEach(function () {
      this.change_id = 'mock-change-id-1'
    })

    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 200 }, this.body)
        this.handler.acceptChanges(
          this.project_id,
          this.doc_id,
          [this.change_id],
          this.callback
        )
      })

      it('should accept the change in the document updater', function () {
        this.request
          .calledWith({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}/change/accept`,
            json: {
              change_ids: [this.change_id],
            },
            method: 'POST',
            timeout: 30 * 1000,
          })
          .should.equal(true)
      })

      it('should call the callback', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.acceptChanges(
          this.project_id,
          this.doc_id,
          [this.change_id],
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.acceptChanges(
          this.project_id,
          this.doc_id,
          [this.change_id],
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('deleteThread', function () {
    beforeEach(function () {
      this.thread_id = 'mock-thread-id-1'
    })

    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 200 }, this.body)
        this.handler.deleteThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should delete the thread in the document updater', function () {
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}/comment/${this.thread_id}`,
            method: 'DELETE',
          })
          .should.equal(true)
      })

      it('should call the callback', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.deleteThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.deleteThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('resolveThread', function () {
    beforeEach(function () {
      this.thread_id = 'mock-thread-id-1'
    })

    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 200 }, this.body)
        this.handler.resolveThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should resolve the thread in the document updater', function () {
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}/comment/${this.thread_id}/resolve`,
            method: 'POST',
          })
          .should.equal(true)
      })

      it('should call the callback', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.resolveThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.resolveThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('reopenThread', function () {
    beforeEach(function () {
      this.thread_id = 'mock-thread-id-1'
    })

    describe('successfully', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 200 }, this.body)
        this.handler.reopenThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should reopen the thread in the document updater', function () {
        this.request
          .calledWithMatch({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}/comment/${this.thread_id}/reopen`,
            method: 'POST',
          })
          .should.equal(true)
      })

      it('should call the callback', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.reopenThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.reopenThread(
          this.project_id,
          this.doc_id,
          this.thread_id,
          this.user_id,
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })

  describe('updateProjectStructure ', function () {
    beforeEach(function () {
      this.user_id = 1234
      this.version = 999
    })

    describe('with project history disabled', function () {
      beforeEach(function () {
        this.settings.apis.project_history.sendProjectStructureOps = false
        this.handler.updateProjectStructure(
          this.project_id,
          this.projectHistoryId,
          this.user_id,
          {},
          this.source,
          this.callback
        )
      })

      it('does not make a web request', function () {
        this.request.called.should.equal(false)
      })

      it('calls the callback', function () {
        this.callback.called.should.equal(true)
      })
    })

    describe('with project history enabled', function () {
      beforeEach(function () {
        this.settings.apis.project_history.sendProjectStructureOps = true
        this.url = `${this.settings.apis.documentupdater.url}/project/${this.project_id}`
        this.request.callsArgWith(1, null, { statusCode: 204 }, '')
      })

      describe('when an entity has changed name', function () {
        it('should send the structure update to the document updater', function (done) {
          this.docIdA = new ObjectId()
          this.docIdB = new ObjectId()
          this.changes = {
            oldDocs: [
              { path: '/old_a', doc: { _id: this.docIdA } },
              { path: '/old_b', doc: { _id: this.docIdB } },
            ],
            // create new instances of the same ObjectIds so that == doesn't pass
            newDocs: [
              {
                path: '/old_a',
                doc: { _id: new ObjectId(this.docIdA.toString()) },
              },
              {
                path: '/new_b',
                doc: { _id: new ObjectId(this.docIdB.toString()) },
              },
            ],
            newProject: { version: this.version },
          }

          const updates = [
            {
              type: 'rename-doc',
              id: this.docIdB.toString(),
              pathname: '/old_b',
              newPathname: '/new_b',
            },
          ]

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            () => {
              this.request
                .calledWith({
                  url: this.url,
                  method: 'POST',
                  json: {
                    updates,
                    userId: this.user_id,
                    version: this.version,
                    projectHistoryId: this.projectHistoryId,
                    source: this.source,
                  },
                  timeout: 30 * 1000,
                })
                .should.equal(true)
              done()
            }
          )
        })
      })

      describe('when a doc has been added', function () {
        it('should send the structure update to the document updater', function (done) {
          this.docId = new ObjectId()
          this.changes = {
            newDocs: [
              { path: '/foo', docLines: 'a\nb', doc: { _id: this.docId } },
            ],
            newProject: { version: this.version },
          }

          const updates = [
            {
              type: 'add-doc',
              id: this.docId.toString(),
              pathname: '/foo',
              docLines: 'a\nb',
              historyRangesSupport: false,
              url: undefined,
              hash: undefined,
              ranges: undefined,
              metadata: undefined,
              createdBlob: false,
            },
          ]

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            () => {
              this.request.should.have.been.calledWith({
                url: this.url,
                method: 'POST',
                json: {
                  updates,
                  userId: this.user_id,
                  version: this.version,
                  projectHistoryId: this.projectHistoryId,
                  source: this.source,
                },
                timeout: 30 * 1000,
              })
              done()
            }
          )
        })
      })

      describe('when a file has been added', function () {
        it('should send the structure update to the document updater', function (done) {
          this.fileId = new ObjectId()
          this.changes = {
            newFiles: [
              {
                path: '/bar',
                url: 'filestore.example.com/file',
                file: { _id: this.fileId, hash: '12345' },
              },
            ],
            newProject: { version: this.version },
          }

          const updates = [
            {
              type: 'add-file',
              id: this.fileId.toString(),
              pathname: '/bar',
              url: 'filestore.example.com/file',
              docLines: undefined,
              historyRangesSupport: false,
              hash: '12345',
              ranges: undefined,
              createdBlob: false,
              metadata: undefined,
            },
          ]

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            () => {
              this.request.should.have.been.calledWith({
                url: this.url,
                method: 'POST',
                json: {
                  updates,
                  userId: this.user_id,
                  version: this.version,
                  projectHistoryId: this.projectHistoryId,
                  source: this.source,
                },
                timeout: 30 * 1000,
              })
              done()
            }
          )
        })
      })

      describe('when an entity has been deleted', function () {
        it('should end the structure update to the document updater', function (done) {
          this.docId = new ObjectId()
          this.changes = {
            oldDocs: [
              { path: '/foo', docLines: 'a\nb', doc: { _id: this.docId } },
            ],
            newProject: { version: this.version },
          }

          const updates = [
            {
              type: 'rename-doc',
              id: this.docId.toString(),
              pathname: '/foo',
              newPathname: '',
            },
          ]

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            () => {
              this.request.should.have.been.calledWith({
                url: this.url,
                method: 'POST',
                json: {
                  updates,
                  userId: this.user_id,
                  version: this.version,
                  projectHistoryId: this.projectHistoryId,
                  source: this.source,
                },
                timeout: 30 * 1000,
              })
              done()
            }
          )
        })
      })

      describe('when a file is converted to a doc', function () {
        it('should send the delete first', function (done) {
          this.docId = new ObjectId()
          this.fileId = new ObjectId()
          this.changes = {
            oldFiles: [
              {
                path: '/foo.doc',
                url: 'filestore.example.com/file',
                file: { _id: this.fileId },
              },
            ],
            newDocs: [
              {
                path: '/foo.doc',
                docLines: 'hello there',
                doc: { _id: this.docId },
              },
            ],
            newProject: { version: this.version },
          }

          const updates = [
            {
              type: 'rename-file',
              id: this.fileId.toString(),
              pathname: '/foo.doc',
              newPathname: '',
            },
            {
              type: 'add-doc',
              id: this.docId.toString(),
              pathname: '/foo.doc',
              docLines: 'hello there',
              historyRangesSupport: false,
              url: undefined,
              hash: undefined,
              ranges: undefined,
              metadata: undefined,
              createdBlob: false,
            },
          ]

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            () => {
              this.request.should.have.been.calledWith({
                url: this.url,
                method: 'POST',
                json: {
                  updates,
                  userId: this.user_id,
                  version: this.version,
                  projectHistoryId: this.projectHistoryId,
                  source: this.source,
                },
                timeout: 30 * 1000,
              })
              done()
            }
          )
        })
      })

      describe('when the project version is missing', function () {
        it('should call the callback with an error', function () {
          this.docId = new ObjectId()
          this.changes = {
            oldDocs: [
              { path: '/foo', docLines: 'a\nb', doc: { _id: this.docId } },
            ],
          }

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            this.callback
          )

          this.callback
            .calledWith(sinon.match.instanceOf(Error))
            .should.equal(true)
          const firstCallArgs = this.callback.args[0]
          firstCallArgs[0].message.should.equal(
            'did not receive project version in changes'
          )
        })
      })

      describe('when ranges are present', function () {
        beforeEach(function () {
          this.docId = new ObjectId()
          this.ranges = {
            changes: [
              {
                op: { p: 0, i: 'foo' },
                metadata: { ts: '2024-01-01T00:00:00.000Z', user_id: 'user-1' },
              },
              {
                op: { p: 7, d: ' baz' },
                metadata: { ts: '2024-02-01T00:00:00.000Z', user_id: 'user-1' },
              },
            ],
            comments: [
              {
                op: { p: 4, c: 'bar', t: 'comment-1' },
                metadata: { resolved: false },
              },
            ],
          }
          this.changes = {
            newDocs: [
              {
                path: '/foo',
                docLines: 'foo\nbar',
                doc: { _id: this.docId },
                ranges: this.ranges,
              },
            ],
            newProject: { version: this.version },
          }
        })

        it('should forward ranges', function (done) {
          const updates = [
            {
              type: 'add-doc',
              id: this.docId.toString(),
              pathname: '/foo',
              docLines: 'foo\nbar',
              historyRangesSupport: false,
              url: undefined,
              hash: undefined,
              ranges: this.ranges,
              metadata: undefined,
              createdBlob: false,
            },
          ]

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            () => {
              this.request.should.have.been.calledWith({
                url: this.url,
                method: 'POST',
                json: {
                  updates,
                  userId: this.user_id,
                  version: this.version,
                  projectHistoryId: this.projectHistoryId,
                  source: this.source,
                },
                timeout: 30 * 1000,
              })
              done()
            }
          )
        })

        it('should include flag when history ranges support is enabled', function (done) {
          this.ProjectGetter.getProjectWithoutLock
            .withArgs(this.project_id)
            .yields(null, {
              _id: this.project_id,
              overleaf: { history: { rangesSupportEnabled: true } },
            })

          const updates = [
            {
              type: 'add-doc',
              id: this.docId.toString(),
              pathname: '/foo',
              docLines: 'foo\nbar',
              historyRangesSupport: true,
              url: undefined,
              hash: undefined,
              ranges: this.ranges,
              metadata: undefined,
              createdBlob: false,
            },
          ]

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            () => {
              this.request.should.have.been.calledWith({
                url: this.url,
                method: 'POST',
                json: {
                  updates,
                  userId: this.user_id,
                  version: this.version,
                  projectHistoryId: this.projectHistoryId,
                  source: this.source,
                },
                timeout: 30 * 1000,
              })
              done()
            }
          )
        })
      })

      describe('with filestore disabled', function () {
        beforeEach(function () {
          this.settings.disableFilestore = true
        })
        it('should add files without URL and with createdBlob', function (done) {
          this.fileId = new ObjectId()
          this.changes = {
            newFiles: [
              {
                path: '/bar',
                url: 'filestore.example.com/file',
                file: { _id: this.fileId, hash: '12345' },
              },
            ],
            newProject: { version: this.version },
          }

          const updates = [
            {
              type: 'add-file',
              id: this.fileId.toString(),
              pathname: '/bar',
              docLines: undefined,
              historyRangesSupport: false,
              url: undefined,
              hash: '12345',
              ranges: undefined,
              createdBlob: true,
              metadata: undefined,
            },
          ]

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            () => {
              this.request.should.have.been.calledWith({
                url: this.url,
                method: 'POST',
                json: {
                  updates,
                  userId: this.user_id,
                  version: this.version,
                  projectHistoryId: this.projectHistoryId,
                  source: this.source,
                },
                timeout: 30 * 1000,
              })
              done()
            }
          )
        })
        it('should flag files without hash', function (done) {
          this.fileId = new ObjectId()
          this.changes = {
            newFiles: [
              {
                path: '/bar',
                url: 'filestore.example.com/file',
                file: { _id: this.fileId },
              },
            ],
            newProject: { version: this.version },
          }

          this.handler.updateProjectStructure(
            this.project_id,
            this.projectHistoryId,
            this.user_id,
            this.changes,
            this.source,
            err => {
              err.should.match(/found file with missing hash/)
              this.request.should.not.have.been.called
              done()
            }
          )
        })
      })
    })
  })

  describe('resyncProjectHistory', function () {
    it('should add docs', function (done) {
      const docId1 = new ObjectId()
      const docId2 = new ObjectId()
      const docs = [
        { doc: { _id: docId1 }, path: 'main.tex' },
        { doc: { _id: docId2 }, path: 'references.bib' },
      ]
      const files = []
      this.request.yields(null, { statusCode: 200 })
      const projectId = new ObjectId()
      const projectHistoryId = 99
      this.handler.resyncProjectHistory(
        projectId,
        projectHistoryId,
        docs,
        files,
        {},
        () => {
          this.request.should.have.been.calledWith({
            url: `${this.settings.apis.documentupdater.url}/project/${projectId}/history/resync`,
            method: 'POST',
            json: {
              docs: [
                { doc: docId1, path: 'main.tex' },
                { doc: docId2, path: 'references.bib' },
              ],
              files: [],
              projectHistoryId,
            },
            timeout: 6 * 60 * 1000,
          })
          done()
        }
      )
    })
    it('should add files', function (done) {
      const fileId1 = new ObjectId()
      const fileId2 = new ObjectId()
      const fileId3 = new ObjectId()
      const fileCreated2 = new Date()
      const fileCreated3 = new Date()
      const otherProjectId = new ObjectId().toString()
      const files = [
        { file: { _id: fileId1, hash: '42' }, path: '1.png' },
        {
          file: {
            _id: fileId2,
            hash: '1337',
            created: fileCreated2,
            linkedFileData: {
              provider: 'references-provider',
            },
          },
          path: '1.bib',
        },
        {
          file: {
            _id: fileId3,
            hash: '21',
            created: fileCreated3,
            linkedFileData: {
              provider: 'project_output_file',
              build_id: '1234-abc',
              clsiServerId: 'server-1',
              source_project_id: otherProjectId,
              source_output_file_path: 'foo/bar.txt',
            },
          },
          path: 'bar.txt',
        },
      ]
      const docs = []
      this.request.yields(null, { statusCode: 200 })
      const projectId = new ObjectId()
      const projectHistoryId = 99
      this.handler.resyncProjectHistory(
        projectId,
        projectHistoryId,
        docs,
        files,
        {},
        () => {
          this.request.should.have.been.calledWith({
            url: `${this.settings.apis.documentupdater.url}/project/${projectId}/history/resync`,
            method: 'POST',
            json: {
              docs: [],
              files: [
                {
                  file: fileId1,
                  _hash: '42',
                  path: '1.png',
                  url: `http://filestore/project/${projectId}/file/${fileId1}`,
                  createdBlob: false,
                  metadata: undefined,
                },
                {
                  file: fileId2,
                  _hash: '1337',
                  path: '1.bib',
                  url: `http://filestore/project/${projectId}/file/${fileId2}`,
                  createdBlob: false,
                  metadata: {
                    importedAt: fileCreated2,
                    provider: 'references-provider',
                  },
                },
                {
                  file: fileId3,
                  _hash: '21',
                  path: 'bar.txt',
                  url: `http://filestore/project/${projectId}/file/${fileId3}`,
                  createdBlob: false,
                  metadata: {
                    importedAt: fileCreated3,
                    provider: 'project_output_file',
                    source_project_id: otherProjectId,
                    source_output_file_path: 'foo/bar.txt',
                    // build_id and clsiServerId are omitted
                  },
                },
              ],
              projectHistoryId,
            },
            timeout: 6 * 60 * 1000,
          })
          done()
        }
      )
    })
    describe('with filestore disabled', function () {
      beforeEach(function () {
        this.settings.disableFilestore = true
      })
      it('should add files without URL', function (done) {
        const fileId1 = new ObjectId()
        const fileId2 = new ObjectId()
        const fileId3 = new ObjectId()
        const fileCreated2 = new Date()
        const fileCreated3 = new Date()
        const otherProjectId = new ObjectId().toString()
        const files = [
          { file: { _id: fileId1, hash: '42' }, path: '1.png' },
          {
            file: {
              _id: fileId2,
              hash: '1337',
              created: fileCreated2,
              linkedFileData: {
                provider: 'references-provider',
              },
            },
            path: '1.bib',
          },
          {
            file: {
              _id: fileId3,
              hash: '21',
              created: fileCreated3,
              linkedFileData: {
                provider: 'project_output_file',
                build_id: '1234-abc',
                clsiServerId: 'server-1',
                source_project_id: otherProjectId,
                source_output_file_path: 'foo/bar.txt',
              },
            },
            path: 'bar.txt',
          },
        ]
        const docs = []
        this.request.yields(null, { statusCode: 200 })
        const projectId = new ObjectId()
        const projectHistoryId = 99
        this.handler.resyncProjectHistory(
          projectId,
          projectHistoryId,
          docs,
          files,
          {},
          () => {
            this.request.should.have.been.calledWith({
              url: `${this.settings.apis.documentupdater.url}/project/${projectId}/history/resync`,
              method: 'POST',
              json: {
                docs: [],
                files: [
                  {
                    file: fileId1,
                    _hash: '42',
                    path: '1.png',
                    url: undefined,
                    createdBlob: true,
                    metadata: undefined,
                  },
                  {
                    file: fileId2,
                    _hash: '1337',
                    path: '1.bib',
                    url: undefined,
                    createdBlob: true,
                    metadata: {
                      importedAt: fileCreated2,
                      provider: 'references-provider',
                    },
                  },
                  {
                    file: fileId3,
                    _hash: '21',
                    path: 'bar.txt',
                    url: undefined,
                    createdBlob: true,
                    metadata: {
                      importedAt: fileCreated3,
                      provider: 'project_output_file',
                      source_project_id: otherProjectId,
                      source_output_file_path: 'foo/bar.txt',
                      // build_id and clsiServerId are omitted
                    },
                  },
                ],
                projectHistoryId,
              },
              timeout: 6 * 60 * 1000,
            })
            done()
          }
        )
      })
      it('should flag files with missing hashes', function (done) {
        const fileId1 = new ObjectId()
        const fileId2 = new ObjectId()
        const fileId3 = new ObjectId()
        const fileCreated2 = new Date()
        const fileCreated3 = new Date()
        const otherProjectId = new ObjectId().toString()
        const files = [
          { file: { _id: fileId1, hash: '42' }, path: '1.png' },
          {
            file: {
              _id: fileId2,
              created: fileCreated2,
              linkedFileData: {
                provider: 'references-provider',
              },
            },
            path: '1.bib',
          },
          {
            file: {
              _id: fileId3,
              hash: '21',
              created: fileCreated3,
              linkedFileData: {
                provider: 'project_output_file',
                build_id: '1234-abc',
                clsiServerId: 'server-1',
                source_project_id: otherProjectId,
                source_output_file_path: 'foo/bar.txt',
              },
            },
            path: 'bar.txt',
          },
        ]
        const docs = []
        this.request.yields(null, { statusCode: 200 })
        const projectId = new ObjectId()
        const projectHistoryId = 99
        this.handler.resyncProjectHistory(
          projectId,
          projectHistoryId,
          docs,
          files,
          {},
          err => {
            err.should.match(/found file with missing hash/)
            this.request.should.not.have.been.called
            done()
          }
        )
      })
    })
  })

  describe('appendToDocument', function () {
    describe('successfully', function () {
      beforeEach(function () {
        this.body = {
          rev: 1,
        }
        this.request.callsArgWith(1, null, { statusCode: 200 }, this.body)
        this.handler.appendToDocument(
          this.project_id,
          this.doc_id,
          this.user_id,
          this.lines,
          this.source,
          this.callback
        )
      })

      it('should append to the document in the document updater', function () {
        this.request
          .calledWith({
            url: `${this.settings.apis.documentupdater.url}/project/${this.project_id}/doc/${this.doc_id}/append`,
            json: {
              lines: this.lines,
              source: this.source,
              user_id: this.user_id,
            },
            method: 'POST',
            timeout: 30 * 1000,
          })
          .should.equal(true)
      })

      it('should call the callback with no error', function () {
        this.callback.calledWith(null).should.equal(true)
      })
    })

    describe('when the document updater API returns an error', function () {
      beforeEach(function () {
        this.request.callsArgWith(
          1,
          new Error('something went wrong'),
          null,
          null
        )
        this.handler.appendToDocument(
          this.project_id,
          this.doc_id,
          this.user_id,
          this.lines,
          this.source,
          this.callback
        )
      })

      it('should return an error to the callback', function () {
        this.callback
          .calledWith(sinon.match.instanceOf(Error))
          .should.equal(true)
      })
    })

    describe('when the document updater returns a failure error code', function () {
      beforeEach(function () {
        this.request.callsArgWith(1, null, { statusCode: 500 }, '')
        this.handler.appendToDocument(
          this.project_id,
          this.doc_id,
          this.user_id,
          this.lines,
          this.source,
          this.callback
        )
      })

      it('should return the callback with an error', function () {
        this.callback
          .calledWith(
            sinon.match
              .instanceOf(Error)
              .and(
                sinon.match.has(
                  'message',
                  'document updater returned a failure status code: 500'
                )
              )
          )
          .should.equal(true)
      })
    })
  })
})