_ = require 'underscore'
fs = require 'fs'
Actions = require '../src/flux/actions'
NylasAPI = require '../src/flux/nylas-api'
Thread = require '../src/flux/models/thread'
AccountStore = require '../src/flux/stores/account-store'
DatabaseStore = require '../src/flux/stores/database-store'
DatabaseTransaction = require '../src/flux/stores/database-transaction'

describe "NylasAPI", ->
  describe "handleModel404", ->
    it "should unpersist the model from the cache that was requested", ->
      model = new Thread(id: 'threadidhere')
      spyOn(DatabaseTransaction.prototype, 'unpersistModel')
      spyOn(DatabaseStore, 'find').andCallFake (klass, id) =>
        return Promise.resolve(model)
      NylasAPI._handleModel404("/threads/#{model.id}")
      advanceClock()
      expect(DatabaseStore.find).toHaveBeenCalledWith(Thread, model.id)
      expect(DatabaseTransaction.prototype.unpersistModel).toHaveBeenCalledWith(model)

    it "should not do anything if the model is not in the cache", ->
      spyOn(DatabaseTransaction.prototype, 'unpersistModel')
      spyOn(DatabaseStore, 'find').andCallFake (klass, id) =>
        return Promise.resolve(null)
      NylasAPI._handleModel404("/threads/1234")
      advanceClock()
      expect(DatabaseStore.find).toHaveBeenCalledWith(Thread, '1234')
      expect(DatabaseTransaction.prototype.unpersistModel).not.toHaveBeenCalledWith()

    it "should not do anything bad if it doesn't recognize the class", ->
      spyOn(DatabaseStore, 'find')
      spyOn(DatabaseTransaction.prototype, 'unpersistModel')
      waitsForPromise ->
        NylasAPI._handleModel404("/asdasdasd/1234")
      runs ->
        expect(DatabaseStore.find).not.toHaveBeenCalled()
        expect(DatabaseTransaction.prototype.unpersistModel).not.toHaveBeenCalled()

    it "should not do anything bad if the endpoint only has a single segment", ->
      spyOn(DatabaseStore, 'find')
      spyOn(DatabaseTransaction.prototype, 'unpersistModel')
      waitsForPromise ->
        NylasAPI._handleModel404("/account")
      runs ->
        expect(DatabaseStore.find).not.toHaveBeenCalled()
        expect(DatabaseTransaction.prototype.unpersistModel).not.toHaveBeenCalled()

  describe "handleAuthenticationFailure", ->
    it "should post a notification", ->
      spyOn(Actions, 'postNotification')
      NylasAPI._handleAuthenticationFailure('/threads/1234', 'token')
      expect(Actions.postNotification).toHaveBeenCalled()
      expect(Actions.postNotification.mostRecentCall.args[0].message.trim()).toEqual("Nylas N1 can no longer authenticate with your mail provider. You will not be able to send or receive mail. Please click here to reconnect your account.")

    it "should include the email address if possible", ->
      spyOn(AccountStore, 'tokenForAccountId').andReturn('token')
      spyOn(Actions, 'postNotification')
      NylasAPI._handleAuthenticationFailure('/threads/1234', 'token')
      expect(Actions.postNotification).toHaveBeenCalled()
      expect(Actions.postNotification.mostRecentCall.args[0].message.trim()).toEqual("Nylas N1 can no longer authenticate with #{AccountStore.accounts()[0].emailAddress}. You will not be able to send or receive mail. Please click here to reconnect your account.")

  describe "handleModelResponse", ->
    beforeEach ->
      spyOn(DatabaseTransaction.prototype, "persistModels").andCallFake (models) ->
        Promise.resolve(models)

    stubDB = ({models, testClass, testMatcher}) ->
      spyOn(DatabaseStore, "findAll").andCallFake (klass)  ->
        testClass?(klass)
        where: (matcher) ->
          testMatcher?(matcher)
          Promise.resolve(models)

    it "should reject if no JSON is provided", ->
      waitsForPromise ->
        NylasAPI._handleModelResponse()
        .then -> throw new Error("Should reject!")
        .catch (err) ->
          expect(err.message).toEqual "handleModelResponse with no JSON provided"

    it "should resolve if an empty JSON array is provided", ->
      waitsForPromise ->
        NylasAPI._handleModelResponse([])
        .then (resp) ->
          expect(resp).toEqual []

    describe "if JSON contains objects which are of unknown types", ->
      it "should warn and resolve", ->
        spyOn(console, "warn")
        waitsForPromise ->
          NylasAPI._handleModelResponse([{id: 'a', object: 'unknown'}])
          .then (resp) ->
            expect(resp).toEqual []
            expect(console.warn).toHaveBeenCalled()
            expect(console.warn.calls.length).toBe 1

    describe "if JSON contains the same object more than once", ->
      beforeEach ->
        stubDB(models: [])
        spyOn(console, "warn")
        @dupes = [
          {id: 'a', object: 'thread'}
          {id: 'a', object: 'thread'}
          {id: 'b', object: 'thread'}
        ]

      it "should warn", ->
        waitsForPromise =>
          NylasAPI._handleModelResponse(@dupes)
          .then ->
            expect(console.warn).toHaveBeenCalled()
            expect(console.warn.calls.length).toBe 1

      it "should omit duplicates", ->
        waitsForPromise =>
          NylasAPI._handleModelResponse(@dupes)
          .then ->
            models = DatabaseTransaction.prototype.persistModels.calls[0].args[0]
            expect(models.length).toBe 2
            expect(models[0].id).toBe 'a'
            expect(models[1].id).toBe 'b'

    describe "when items in the JSON are locked and we are not accepting changes to them", ->
      it "should remove locked models from the set", ->
        json = [
          {id: 'a', object: 'thread'}
          {id: 'b', object: 'thread'}
        ]
        spyOn(NylasAPI._lockTracker, "acceptRemoteChangesTo").andCallFake (klass, id) ->
          if id is "a" then return false

        stubDB models: [new Thread(json[1])], testMatcher: (whereMatcher) ->
          expect(whereMatcher.val).toEqual 'b'

        waitsForPromise =>
          NylasAPI._handleModelResponse(json)
          .then (models) ->
            expect(models.length).toBe 1
            models = DatabaseTransaction.prototype.persistModels.calls[0].args[0]
            expect(models.length).toBe 1
            expect(models[0].id).toBe 'b'

    describe "when updating models", ->
      Message = require '../src/flux/models/message'
      beforeEach ->
        @json = [
          {id: 'a', object: 'draft', unread: true}
          {id: 'b', object: 'draft', starred: true}
        ]
        @existing = new Message(id: 'b', unread: true)
        stubDB models: [@existing]

      verifyUpdateHappened = (responseModels) ->
        changedModels = DatabaseTransaction.prototype.persistModels.calls[0].args[0]
        expect(changedModels.length).toBe 2
        expect(changedModels[1].id).toBe 'b'
        expect(changedModels[1].starred).toBe true
        # Doesn't override existing values
        expect(changedModels[1].unread).toBe true
        expect(responseModels.length).toBe 2
        expect(responseModels[0].id).toBe 'a'
        expect(responseModels[0].unread).toBe true

      it "updates found models with new data", ->
        waitsForPromise =>
          NylasAPI._handleModelResponse(@json).then verifyUpdateHappened

      it "updates if the json version is newer", ->
        @existing.version = 9
        @json[1].version = 10
        waitsForPromise =>
          NylasAPI._handleModelResponse(@json).then verifyUpdateHappened

      verifyUpdateStopped = (responseModels) ->
        changedModels = DatabaseTransaction.prototype.persistModels.calls[0].args[0]
        expect(changedModels.length).toBe 1
        expect(changedModels[0].id).toBe 'a'
        expect(changedModels[0].unread).toBe true
        expect(responseModels.length).toBe 2
        expect(responseModels[1].id).toBe 'b'
        expect(responseModels[1].starred).toBeUndefined()

      it "doesn't update if the json version is older", ->
        @existing.version = 10
        @json[1].version = 9
        waitsForPromise =>
          NylasAPI._handleModelResponse(@json).then verifyUpdateStopped

      it "doesn't update if it's already sent", ->
        @existing.draft = false
        @json[1].draft = true
        waitsForPromise =>
          NylasAPI._handleModelResponse(@json).then verifyUpdateStopped

    describe "handling all types of objects", ->
      apiObjectToClassMap =
        "file": require('../src/flux/models/file')
        "event": require('../src/flux/models/event')
        "label": require('../src/flux/models/label')
        "folder": require('../src/flux/models/folder')
        "thread": require('../src/flux/models/thread')
        "draft": require('../src/flux/models/message')
        "account": require('../src/flux/models/account')
        "message": require('../src/flux/models/message')
        "contact": require('../src/flux/models/contact')
        "calendar": require('../src/flux/models/calendar')

      verifyUpdateHappened = (klass, responseModels) ->
        changedModels = DatabaseTransaction.prototype.persistModels.calls[0].args[0]
        expect(changedModels.length).toBe 2
        expect(changedModels[0].id).toBe 'a'
        expect(changedModels[1].id).toBe 'b'
        expect(changedModels[0] instanceof klass).toBe true
        expect(changedModels[1] instanceof klass).toBe true
        expect(responseModels.length).toBe 2
        expect(responseModels[0].id).toBe 'a'
        expect(responseModels[1].id).toBe 'b'
        expect(responseModels[0] instanceof klass).toBe true
        expect(responseModels[1] instanceof klass).toBe true

      _.forEach apiObjectToClassMap, (klass, type) ->
        it "properly handle the '#{type}' type", ->
          json = [
            {id: 'a', object: type}
            {id: 'b', object: type}
          ]
          stubDB models: [new klass(id: 'b')]

          verifyUpdate = _.partial(verifyUpdateHappened, klass)
          waitsForPromise =>
            NylasAPI._handleModelResponse(json).then verifyUpdate