const { expect } = require('chai')
const modulePath = '../../../../app/src/Features/Project/ProjectLocator'
const SandboxedModule = require('sandboxed-module')
const sinon = require('sinon')
const Errors = require('../../../../app/src/Features/Errors/Errors')

const project = { _id: '1234566', rootFolder: [] }
class Project {}
const rootDoc = { name: 'rootDoc', _id: 'das239djd' }
const doc1 = { name: 'otherDoc.txt', _id: 'dsad2ddd' }
const doc2 = { name: 'docname.txt', _id: 'dsad2ddddd' }
const file1 = { name: 'file1', _id: 'dsa9lkdsad' }
const subSubFile = { name: 'subSubFile', _id: 'd1d2dk' }
const subSubDoc = { name: 'subdoc.txt', _id: '321dmdwi' }
const secondSubFolder = {
  name: 'secondSubFolder',
  _id: 'dsa3e23',
  docs: [subSubDoc],
  fileRefs: [subSubFile],
  folders: [],
}
const subFolder = {
  name: 'subFolder',
  _id: 'dsadsa93',
  folders: [secondSubFolder, null],
  docs: [],
  fileRefs: [],
}
const subFolder1 = { name: 'subFolder1', _id: '123asdjoij' }

const rootFolder = {
  _id: '123sdskd',
  docs: [doc1, doc2, null, rootDoc],
  fileRefs: [file1],
  folders: [subFolder1, subFolder],
}

project.rootFolder[0] = rootFolder
project.rootDoc_id = rootDoc._id

describe('ProjectLocator', function () {
  beforeEach(function () {
    Project.findById = (projectId, callback) => {
      callback(null, project)
    }
    this.ProjectGetter = {
      getProject: sinon.stub().callsArgWith(2, null, project),
    }
    this.ProjectHelper = {
      isArchived: sinon.stub(),
      isTrashed: sinon.stub(),
      isArchivedOrTrashed: sinon.stub(),
    }
    this.locator = SandboxedModule.require(modulePath, {
      requires: {
        '../../models/Project': { Project },
        '../../models/User': { User: this.User },
        './ProjectGetter': this.ProjectGetter,
        './ProjectHelper': this.ProjectHelper,
      },
    })
  })

  describe('finding a doc', function () {
    it('finds one at the root level', function (done) {
      this.locator.findElement(
        { project_id: project._id, element_id: doc2._id, type: 'docs' },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(doc2._id)
          path.fileSystem.should.equal(`/${doc2.name}`)
          parentFolder._id.should.equal(project.rootFolder[0]._id)
          path.mongo.should.equal('rootFolder.0.docs.1')
          done()
        }
      )
    })

    it('when it is nested', function (done) {
      this.locator.findElement(
        { project_id: project._id, element_id: subSubDoc._id, type: 'doc' },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          expect(foundElement._id).to.equal(subSubDoc._id)
          path.fileSystem.should.equal(
            `/${subFolder.name}/${secondSubFolder.name}/${subSubDoc.name}`
          )
          parentFolder._id.should.equal(secondSubFolder._id)
          path.mongo.should.equal('rootFolder.0.folders.1.folders.0.docs.0')
          done()
        }
      )
    })

    it('should give error if element could not be found', function (done) {
      this.locator.findElement(
        { project_id: project._id, element_id: 'ddsd432nj42', type: 'docs' },
        (err, foundElement, path, parentFolder) => {
          expect(err).to.be.instanceOf(Errors.NotFoundError)
          expect(err).to.have.property('message', 'entity not found')
          done()
        }
      )
    })
  })

  describe('finding a folder', function () {
    it('should return root folder when looking for root folder', function (done) {
      this.locator.findElement(
        { project_id: project._id, element_id: rootFolder._id, type: 'folder' },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(rootFolder._id)
          done()
        }
      )
    })

    it('when at root', function (done) {
      this.locator.findElement(
        { project_id: project._id, element_id: subFolder._id, type: 'folder' },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(subFolder._id)
          path.fileSystem.should.equal(`/${subFolder.name}`)
          parentFolder._id.should.equal(rootFolder._id)
          path.mongo.should.equal('rootFolder.0.folders.1')
          done()
        }
      )
    })

    it('when deeply nested', function (done) {
      this.locator.findElement(
        {
          project_id: project._id,
          element_id: secondSubFolder._id,
          type: 'folder',
        },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(secondSubFolder._id)
          path.fileSystem.should.equal(
            `/${subFolder.name}/${secondSubFolder.name}`
          )
          parentFolder._id.should.equal(subFolder._id)
          path.mongo.should.equal('rootFolder.0.folders.1.folders.0')
          done()
        }
      )
    })
  })

  describe('finding a file', function () {
    it('when at root', function (done) {
      this.locator.findElement(
        { project_id: project._id, element_id: file1._id, type: 'fileRefs' },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(file1._id)
          path.fileSystem.should.equal(`/${file1.name}`)
          parentFolder._id.should.equal(rootFolder._id)
          path.mongo.should.equal('rootFolder.0.fileRefs.0')
          done()
        }
      )
    })

    it('when deeply nested', function (done) {
      this.locator.findElement(
        {
          project_id: project._id,
          element_id: subSubFile._id,
          type: 'fileRefs',
        },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(subSubFile._id)
          path.fileSystem.should.equal(
            `/${subFolder.name}/${secondSubFolder.name}/${subSubFile.name}`
          )
          parentFolder._id.should.equal(secondSubFolder._id)
          path.mongo.should.equal('rootFolder.0.folders.1.folders.0.fileRefs.0')
          done()
        }
      )
    })
  })

  describe('finding an element with wrong element type', function () {
    it('should add an s onto the element type', function (done) {
      this.locator.findElement(
        { project_id: project._id, element_id: subSubDoc._id, type: 'doc' },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(subSubDoc._id)
          done()
        }
      )
    })

    it('should convert file to fileRefs', function (done) {
      this.locator.findElement(
        { project_id: project._id, element_id: file1._id, type: 'fileRefs' },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(file1._id)
          done()
        }
      )
    })
  })

  describe('should be able to take actual project as well as id', function () {
    const doc3 = {
      _id: '123dsdj3',
      name: 'doc3',
    }
    const rootFolder2 = {
      _id: '123sddedskd',
      docs: [doc3],
    }
    const project2 = {
      _id: '1234566',
      rootFolder: [rootFolder2],
    }
    it('should find doc in project', function (done) {
      this.locator.findElement(
        { project: project2, element_id: doc3._id, type: 'docs' },
        (err, foundElement, path, parentFolder) => {
          if (err != null) {
            return done(err)
          }
          foundElement._id.should.equal(doc3._id)
          path.fileSystem.should.equal(`/${doc3.name}`)
          parentFolder._id.should.equal(project2.rootFolder[0]._id)
          path.mongo.should.equal('rootFolder.0.docs.0')
          done()
        }
      )
    })
  })

  describe('finding root doc', function () {
    it('should return root doc when passed project', function (done) {
      this.locator.findRootDoc(project, (err, doc) => {
        if (err != null) {
          return done(err)
        }
        doc._id.should.equal(rootDoc._id)
        done()
      })
    })

    it('should return root doc when passed project_id', function (done) {
      this.locator.findRootDoc(project._id, (err, doc) => {
        if (err != null) {
          return done(err)
        }
        doc._id.should.equal(rootDoc._id)
        done()
      })
    })

    it('should return null when the project has no rootDoc', function (done) {
      project.rootDoc_id = null
      this.locator.findRootDoc(project, (err, doc) => {
        if (err != null) {
          return done(err)
        }
        expect(doc).to.equal(null)
        done()
      })
    })

    it('should return null when the rootDoc_id no longer exists', function (done) {
      project.rootDoc_id = 'doesntexist'
      this.locator.findRootDoc(project, (err, doc) => {
        if (err != null) {
          return done(err)
        }
        expect(doc).to.equal(null)
        done()
      })
    })
  })

  describe('findElementByPath', function () {
    it('should take a doc path and return the element for a root level document', function (done) {
      const path = `${doc1.name}`
      this.locator.findElementByPath(
        { project, path },
        (err, element, type, folder) => {
          if (err != null) {
            return done(err)
          }
          element.should.deep.equal(doc1)
          expect(type).to.equal('doc')
          expect(folder).to.equal(rootFolder)
          done()
        }
      )
    })

    it('should take a doc path and return the element for a root level document with a starting slash', function (done) {
      const path = `/${doc1.name}`
      this.locator.findElementByPath(
        { project, path },
        (err, element, type, folder) => {
          if (err != null) {
            return done(err)
          }
          element.should.deep.equal(doc1)
          expect(type).to.equal('doc')
          expect(folder).to.equal(rootFolder)
          done()
        }
      )
    })

    it('should take a doc path and return the element for a nested document', function (done) {
      const path = `${subFolder.name}/${secondSubFolder.name}/${subSubDoc.name}`
      this.locator.findElementByPath(
        { project, path },
        (err, element, type, folder) => {
          if (err != null) {
            return done(err)
          }
          element.should.deep.equal(subSubDoc)
          expect(type).to.equal('doc')
          expect(folder).to.equal(secondSubFolder)
          done()
        }
      )
    })

    it('should take a file path and return the element for a root level document', function (done) {
      const path = `${file1.name}`
      this.locator.findElementByPath(
        { project, path },
        (err, element, type, folder) => {
          if (err != null) {
            return done(err)
          }
          element.should.deep.equal(file1)
          expect(type).to.equal('file')
          expect(folder).to.equal(rootFolder)
          done()
        }
      )
    })

    it('should take a file path and return the element for a nested document', function (done) {
      const path = `${subFolder.name}/${secondSubFolder.name}/${subSubFile.name}`
      this.locator.findElementByPath(
        { project, path },
        (err, element, type, folder) => {
          if (err != null) {
            return done(err)
          }
          element.should.deep.equal(subSubFile)
          expect(type).to.equal('file')
          expect(folder).to.equal(secondSubFolder)
          done()
        }
      )
    })

    it('should take a file path and return the element for a nested document case insenstive', function (done) {
      const path = `${subFolder.name.toUpperCase()}/${secondSubFolder.name.toUpperCase()}/${subSubFile.name.toUpperCase()}`
      this.locator.findElementByPath(
        { project, path },
        (err, element, type, folder) => {
          if (err != null) {
            return done(err)
          }
          element.should.deep.equal(subSubFile)
          expect(type).to.equal('file')
          expect(folder).to.equal(secondSubFolder)
          done()
        }
      )
    })

    it('should not return elements with a case-insensitive match when exactCaseMatch is true', function (done) {
      const path = `${subFolder.name.toUpperCase()}/${secondSubFolder.name.toUpperCase()}/${subSubFile.name.toUpperCase()}`
      this.locator.findElementByPath(
        { project, path, exactCaseMatch: true },
        (err, element, type, folder) => {
          err.should.not.equal(undefined)
          expect(element).to.be.undefined
          expect(type).to.be.undefined
          done()
        }
      )
    })

    it('should take a file path and return the element for a nested folder', function (done) {
      const path = `${subFolder.name}/${secondSubFolder.name}`
      this.locator.findElementByPath(
        { project, path },
        (err, element, type, folder) => {
          if (err != null) {
            return done(err)
          }
          element.should.deep.equal(secondSubFolder)
          expect(type).to.equal('folder')
          expect(folder).to.equal(subFolder)
          done()
        }
      )
    })

    it('should take a file path and return the root folder', function (done) {
      const path = '/'
      this.locator.findElementByPath(
        { project, path },
        (err, element, type, folder) => {
          if (err != null) {
            return done(err)
          }
          element.should.deep.equal(rootFolder)
          expect(type).to.equal('folder')
          expect(folder).to.equal(null)
          done()
        }
      )
    })

    it('should return an error if the file can not be found inside know folder', function (done) {
      const path = `${subFolder.name}/${secondSubFolder.name}/exist.txt`
      this.locator.findElementByPath(
        { project, path },
        (err, element, type) => {
          err.should.not.equal(undefined)
          expect(element).to.be.undefined
          expect(type).to.be.undefined
          done()
        }
      )
    })

    it('should return an error if the file can not be found inside unknown folder', function (done) {
      const path = 'this/does/not/exist.txt'
      this.locator.findElementByPath(
        { project, path },
        (err, element, type) => {
          err.should.not.equal(undefined)
          expect(element).to.be.undefined
          expect(type).to.be.undefined
          done()
        }
      )
    })

    describe('where duplicate folder exists', function () {
      beforeEach(function () {
        this.duplicateFolder = {
          name: 'duplicate1',
          _id: '1234',
          folders: [
            {
              name: '1',
              docs: [{ name: 'main.tex', _id: '456' }],
              folders: [],
              fileRefs: [],
            },
          ],
          docs: [(this.doc = { name: 'main.tex', _id: '456' })],
          fileRefs: [],
        }
        this.project = {
          rootFolder: [
            {
              folders: [this.duplicateFolder, this.duplicateFolder],
              fileRefs: [],
              docs: [],
            },
          ],
        }
      })

      it('should not call the callback more than once', function (done) {
        const path = `${this.duplicateFolder.name}/${this.doc.name}`
        this.locator.findElementByPath({ project: this.project, path }, () =>
          done()
        )
      }) // mocha will throw exception if done called multiple times

      it('should not call the callback more than once when the path is longer than 1 level below the duplicate level', function (done) {
        const path = `${this.duplicateFolder.name}/1/main.tex`
        this.locator.findElementByPath({ project: this.project, path }, () =>
          done()
        )
      })
    }) // mocha will throw exception if done called multiple times

    describe('with a null doc', function () {
      beforeEach(function () {
        this.project = {
          rootFolder: [
            {
              folders: [],
              fileRefs: [],
              docs: [{ name: 'main.tex' }, null, { name: 'other.tex' }],
            },
          ],
        }
      })

      it('should not crash with a null', function (done) {
        const path = '/other.tex'
        this.locator.findElementByPath(
          { project: this.project, path },
          (err, element) => {
            if (err != null) {
              return done(err)
            }
            element.name.should.equal('other.tex')
            done()
          }
        )
      })
    })

    describe('with a null project', function () {
      beforeEach(function () {
        this.ProjectGetter = { getProject: sinon.stub().callsArg(2) }
      })

      it('should not crash with a null', function (done) {
        const path = '/other.tex'
        this.locator.findElementByPath(
          { project_id: project._id, path },
          (err, element) => {
            expect(err).to.exist
            done()
          }
        )
      })
    })

    describe('with a project_id', function () {
      it('should take a doc path and return the element for a root level document', function (done) {
        const path = `${doc1.name}`
        this.locator.findElementByPath(
          { project_id: project._id, path },
          (err, element, type) => {
            if (err != null) {
              return done(err)
            }
            this.ProjectGetter.getProject
              .calledWith(project._id, { rootFolder: true, rootDoc_id: true })
              .should.equal(true)
            element.should.deep.equal(doc1)
            expect(type).to.equal('doc')
            done()
          }
        )
      })
    })
  })

  describe('findElementByMongoPath', function () {
    it('traverses the file tree like Mongo would do', function () {
      const element = this.locator.findElementByMongoPath(
        project,
        'rootFolder.0.folders.1.folders.0.fileRefs.0'
      )
      expect(element).to.equal(subSubFile)
    })

    it('throws an error if no element is found', function () {
      expect(() =>
        this.locator.findElementByMongoPath(
          project,
          'rootolder.0.folders.0.folders.0.fileRefs.0'
        )
      ).to.throw
    })
  })
})