sinon = require "sinon"
chai = require("chai")
chai.should()
expect = require("chai").expect
{db, ObjectId} = require "../../../app/js/mongojs"
Settings = require('settings-sharelatex')
rclient = require("redis-sharelatex").createClient(Settings.redis.web)

MockTrackChangesApi = require "./helpers/MockTrackChangesApi"
MockWebApi = require "./helpers/MockWebApi"
DocUpdaterClient = require "./helpers/DocUpdaterClient"

describe "Setting a document", ->
	before ->
		@lines = ["one", "two", "three"]
		@version = 42
		@update =
			doc: @doc_id
			op: [{
				i: "one and a half\n"
				p: 4
			}]
			v: @version
		@result = ["one", "one and a half", "two", "three"]
		@newLines = ["these", "are", "the", "new", "lines"]
		@source = "dropbox"
		@user_id = "user-id-123"
		
		sinon.spy MockTrackChangesApi, "flushDoc"
		sinon.spy MockWebApi, "setDocumentLines"
	
	after ->
		MockWebApi.setDocumentLines.restore()
		MockTrackChangesApi.flushDoc.restore()
				
	describe "when the updated doc exists in the doc updater", ->
		before (done) ->
			[@project_id, @doc_id] = [DocUpdaterClient.randomId(), DocUpdaterClient.randomId()]
			MockWebApi.insertDoc @project_id, @doc_id, lines: @lines
			db.docOps.insert {
				doc_id: ObjectId(@doc_id)
				version: @version
			}, (error) =>
				throw error if error?
				DocUpdaterClient.preloadDoc @project_id, @doc_id, (error) =>
					throw error if error?
					DocUpdaterClient.sendUpdate @project_id, @doc_id, @update, (error) =>
						throw error if error?
						setTimeout () =>
							DocUpdaterClient.setDocLines @project_id, @doc_id, @newLines, @source, @user_id, (error, res, body) =>
								@statusCode = res.statusCode
								done()
						, 200

		it "should return a 204 status code", ->
			@statusCode.should.equal 204

		it "should send the updated doc lines to the web api", ->
			MockWebApi.setDocumentLines
				.calledWith(@project_id, @doc_id, @newLines)
				.should.equal true

		it "should update the lines in the doc updater", (done) ->
			DocUpdaterClient.getDoc @project_id, @doc_id, (error, res, doc) =>
				doc.lines.should.deep.equal @newLines
				done()

		it "should bump the version in the doc updater", (done) ->
			DocUpdaterClient.getDoc @project_id, @doc_id, (error, res, doc) =>
				doc.version.should.equal @version + 2
				done()
		
		it "should leave the document in redis", (done) ->
			rclient.get "doclines:#{@doc_id}", (error, lines) =>
				throw error if error?
				expect(JSON.parse(lines)).to.deep.equal @newLines
				done()
	
	describe "when the updated doc does not exist in the doc updater", ->
		before (done) ->
			[@project_id, @doc_id] = [DocUpdaterClient.randomId(), DocUpdaterClient.randomId()]
			MockWebApi.insertDoc @project_id, @doc_id, lines: @lines
			db.docOps.insert {
				doc_id: ObjectId(@doc_id)
				version: @version
			}, (error) =>
				throw error if error?
				DocUpdaterClient.setDocLines @project_id, @doc_id, @newLines, @source, @user_id, (error, res, body) =>
					@statusCode = res.statusCode
					setTimeout done, 200
		
		it "should return a 204 status code", ->
			@statusCode.should.equal 204

		it "should send the updated doc lines to the web api", ->
			MockWebApi.setDocumentLines
				.calledWith(@project_id, @doc_id, @newLines)
				.should.equal true
		
		it "should flush track changes", ->
			MockTrackChangesApi.flushDoc.calledWith(@doc_id).should.equal true
		
		it "should remove the document from redis", (done) ->
			rclient.get "doclines:#{@doc_id}", (error, lines) =>
				throw error if error?
				expect(lines).to.not.exist
				done()