/*
 * decaffeinate suggestions:
 * DS101: Remove unnecessary use of Array.from
 * DS102: Remove unnecessary code created because of implicit returns
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const sinon = require("sinon");
const chai = require("chai");
chai.should();
const {
    expect
} = chai;
const async = require("async");

const MockWebApi = require("./helpers/MockWebApi");
const DocUpdaterClient = require("./helpers/DocUpdaterClient");
const DocUpdaterApp = require("./helpers/DocUpdaterApp");

describe("Flushing a doc to Mongo", function() {
	before(function(done) {
		this.lines = ["one", "two", "three"];
		this.version = 42;
		this.update = {
			doc: this.doc_id,
			meta: { user_id: 'last-author-fake-id' },
			op: [{
				i: "one and a half\n",
				p: 4
			}],
			v: this.version
		};
		this.result = ["one", "one and a half", "two", "three"];
		return DocUpdaterApp.ensureRunning(done);
	});

	describe("when the updated doc exists in the doc updater", function() {
		before(function(done) {
			[this.project_id, this.doc_id] = Array.from([DocUpdaterClient.randomId(), DocUpdaterClient.randomId()]);
			sinon.spy(MockWebApi, "setDocument");

			MockWebApi.insertDoc(this.project_id, this.doc_id, {lines: this.lines, version: this.version});
			return DocUpdaterClient.sendUpdates(this.project_id, this.doc_id, [this.update], error => {
				if (error != null) { throw error; }
				return setTimeout(() => {
					return DocUpdaterClient.flushDoc(this.project_id, this.doc_id, done);
				}
				, 200);
			});
		});

		after(() => MockWebApi.setDocument.restore());

		it("should flush the updated doc lines and version to the web api", function() {
			return MockWebApi.setDocument
				.calledWith(this.project_id, this.doc_id, this.result, this.version + 1)
				.should.equal(true);
		});

		return it("should flush the last update author and time to the web api", function() {
			const lastUpdatedAt = MockWebApi.setDocument.lastCall.args[5];
			parseInt(lastUpdatedAt).should.be.closeTo((new Date()).getTime(), 30000);

			const lastUpdatedBy = MockWebApi.setDocument.lastCall.args[6];
			return lastUpdatedBy.should.equal('last-author-fake-id');
		});
	});

	describe("when the doc does not exist in the doc updater", function() {
		before(function(done) {
			[this.project_id, this.doc_id] = Array.from([DocUpdaterClient.randomId(), DocUpdaterClient.randomId()]);
			MockWebApi.insertDoc(this.project_id, this.doc_id, {
				lines: this.lines
			});
			sinon.spy(MockWebApi, "setDocument");
			return DocUpdaterClient.flushDoc(this.project_id, this.doc_id, done);
		});

		after(() => MockWebApi.setDocument.restore());

		return it("should not flush the doc to the web api", () => MockWebApi.setDocument.called.should.equal(false));
	});

	return describe("when the web api http request takes a long time on first request", function() {
		before(function(done) {
			[this.project_id, this.doc_id] = Array.from([DocUpdaterClient.randomId(), DocUpdaterClient.randomId()]);
			MockWebApi.insertDoc(this.project_id, this.doc_id, {
				lines: this.lines,
				version: this.version
			});
			let t = 30000;
			sinon.stub(MockWebApi, "setDocument", function(project_id, doc_id, lines, version, ranges, lastUpdatedAt, lastUpdatedBy, callback) {
				if (callback == null) { callback = function(error) {}; }
				setTimeout(callback, t);
				return t = 0;
			});
			return DocUpdaterClient.preloadDoc(this.project_id, this.doc_id, done);
		});

		after(() => MockWebApi.setDocument.restore());
		
		return it("should still work", function(done) {
			const start = Date.now();
			return DocUpdaterClient.flushDoc(this.project_id, this.doc_id, (error, res, doc) => {
				res.statusCode.should.equal(204);
				const delta = Date.now() - start;
				expect(delta).to.be.below(20000);
				return done();
			});
		});
	});
});