/* eslint-disable
    camelcase,
    handle-callback-err,
    no-return-assign,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * 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
} = require("chai");
const Settings = require('settings-sharelatex');
const rclient_du = require("redis-sharelatex").createClient(Settings.redis.documentupdater);
const Keys = Settings.redis.documentupdater.key_schema;

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

describe("Setting a document", function() {
	before(function(done) {
		this.lines = ["one", "two", "three"];
		this.version = 42;
		this.update = {
			doc: this.doc_id,
			op: [{
				i: "one and a half\n",
				p: 4
			}],
			v: this.version
		};
		this.result = ["one", "one and a half", "two", "three"];
		this.newLines = ["these", "are", "the", "new", "lines"];
		this.source = "dropbox";
		this.user_id = "user-id-123";

		sinon.spy(MockTrackChangesApi, "flushDoc");
		sinon.spy(MockProjectHistoryApi, "flushProject");
		sinon.spy(MockWebApi, "setDocument");
		return DocUpdaterApp.ensureRunning(done);
	});

	after(function() {
		MockTrackChangesApi.flushDoc.restore();
		MockProjectHistoryApi.flushProject.restore();
		return MockWebApi.setDocument.restore();
	});

	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()]);
			MockWebApi.insertDoc(this.project_id, this.doc_id, {lines: this.lines, version: this.version});
			DocUpdaterClient.preloadDoc(this.project_id, this.doc_id, error => {
				if (error != null) { throw error; }
				return DocUpdaterClient.sendUpdate(this.project_id, this.doc_id, this.update, error => {
					if (error != null) { throw error; }
					return setTimeout(() => {
						return DocUpdaterClient.setDocLines(this.project_id, this.doc_id, this.newLines, this.source, this.user_id, false, (error, res, body) => {
							this.statusCode = res.statusCode;
							return done();
						});
					}
					, 200);
				});
			});
			return null;
		});

		after(function() {
			MockTrackChangesApi.flushDoc.reset();
			MockProjectHistoryApi.flushProject.reset();
			return MockWebApi.setDocument.reset();
		});

		it("should return a 204 status code", function() {
			return this.statusCode.should.equal(204);
		});

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

		it("should update the lines in the doc updater", function(done) {
			DocUpdaterClient.getDoc(this.project_id, this.doc_id, (error, res, doc) => {
				doc.lines.should.deep.equal(this.newLines);
				return done();
			});
			return null;
		});

		it("should bump the version in the doc updater", function(done) {
			DocUpdaterClient.getDoc(this.project_id, this.doc_id, (error, res, doc) => {
				doc.version.should.equal(this.version + 2);
				return done();
			});
			return null;
		});

		return it("should leave the document in redis", function(done) {
			rclient_du.get(Keys.docLines({doc_id: this.doc_id}), (error, lines) => {
				if (error != null) { throw error; }
				expect(JSON.parse(lines)).to.deep.equal(this.newLines);
				return done();
			});
			return null;
		});
	});

	describe("when the updated 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, version: this.version});
			DocUpdaterClient.setDocLines(this.project_id, this.doc_id, this.newLines, this.source, this.user_id, false, (error, res, body) => {
				this.statusCode = res.statusCode;
				return setTimeout(done, 200);
			});
			return null;
		});

		after(function() {
			MockTrackChangesApi.flushDoc.reset();
			MockProjectHistoryApi.flushProject.reset();
			return MockWebApi.setDocument.reset();
		});

		it("should return a 204 status code", function() {
			return this.statusCode.should.equal(204);
		});

		it("should send the updated doc lines to the web api", function() {
			return MockWebApi.setDocument
				.calledWith(this.project_id, this.doc_id, this.newLines)
				.should.equal(true);
		});

		it("should flush track changes", function() {
			return MockTrackChangesApi.flushDoc.calledWith(this.doc_id).should.equal(true);
		});

		it("should flush project history", function() {
			return MockProjectHistoryApi.flushProject.calledWith(this.project_id).should.equal(true);
		});

		return it("should remove the document from redis", function(done) {
			rclient_du.get(Keys.docLines({doc_id: this.doc_id}), (error, lines) => {
				if (error != null) { throw error; }
				expect(lines).to.not.exist;
				return done();
			});
			return null;
		});
	});

	describe("when the updated doc is too large for the body parser", 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});
			this.newLines = [];
			while (JSON.stringify(this.newLines).length < (Settings.max_doc_length + (64 * 1024))) {
				this.newLines.push("(a long line of text)".repeat(10000));
			}
			DocUpdaterClient.setDocLines(this.project_id, this.doc_id, this.newLines, this.source, this.user_id, false, (error, res, body) => {
				this.statusCode = res.statusCode;
				return setTimeout(done, 200);
			});
			return null;
		});

		after(function() {
			MockTrackChangesApi.flushDoc.reset();
			MockProjectHistoryApi.flushProject.reset();
			return MockWebApi.setDocument.reset();
		});

		it("should return a 413 status code", function() {
			return this.statusCode.should.equal(413);
		});

		it("should not send the updated doc lines to the web api", function() { return MockWebApi.setDocument.called.should.equal(false); });

		it("should not flush track changes", function() { return MockTrackChangesApi.flushDoc.called.should.equal(false); });

		return it("should not flush project history", function() { return MockProjectHistoryApi.flushProject.called.should.equal(false); });
	});

	describe("when the updated doc is large but under the bodyParser and HTTPController size limit", 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});

			this.newLines = [];
			while (JSON.stringify(this.newLines).length < (2 * 1024 * 1024)) { // limit in HTTPController
				this.newLines.push("(a long line of text)".repeat(10000));
			}
			this.newLines.pop(); // remove the line which took it over the limit
			DocUpdaterClient.setDocLines(this.project_id, this.doc_id, this.newLines, this.source, this.user_id, false, (error, res, body) => {
				this.statusCode = res.statusCode;
				return setTimeout(done, 200);
			});
			return null;
		});

		after(function() {
			MockTrackChangesApi.flushDoc.reset();
			MockProjectHistoryApi.flushProject.reset();
			return MockWebApi.setDocument.reset();
		});

		it("should return a 204 status code", function() {
			return this.statusCode.should.equal(204);
		});

		return it("should send the updated doc lines to the web api", function() {
			return MockWebApi.setDocument
				.calledWith(this.project_id, this.doc_id, this.newLines)
				.should.equal(true);
		});
	});

	return describe("with track changes", function() {
		before(function() {
			this.lines = ["one", "one and a half", "two", "three"];
			this.id_seed = "587357bd35e64f6157";
			return this.update = {
				doc: this.doc_id,
				op: [{
					d: "one and a half\n",
					p: 4
				}],
				meta: {
					tc: this.id_seed,
					user_id: this.user_id
				},
				v: this.version
			};
		});

		describe("with the undo flag", 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});
				DocUpdaterClient.preloadDoc(this.project_id, this.doc_id, error => {
					if (error != null) { throw error; }
					return DocUpdaterClient.sendUpdate(this.project_id, this.doc_id, this.update, error => {
						if (error != null) { throw error; }
						// Go back to old lines, with undo flag
						return DocUpdaterClient.setDocLines(this.project_id, this.doc_id, this.lines, this.source, this.user_id, true, (error, res, body) => {
							this.statusCode = res.statusCode;
							return setTimeout(done, 200);
						});
					});
				});
				return null;
			});

			after(function() {
				MockTrackChangesApi.flushDoc.reset();
				MockProjectHistoryApi.flushProject.reset();
				return MockWebApi.setDocument.reset();
			});

			return it("should undo the tracked changes", function(done) {
				DocUpdaterClient.getDoc(this.project_id, this.doc_id, (error, res, data) => {
					if (error != null) { throw error; }
					const {
                        ranges
                    } = data;
					expect(ranges.changes).to.be.undefined;
					return done();
				});
				return null;
			});
		});

		return describe("without the undo flag", 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});
				DocUpdaterClient.preloadDoc(this.project_id, this.doc_id, error => {
					if (error != null) { throw error; }
					return DocUpdaterClient.sendUpdate(this.project_id, this.doc_id, this.update, error => {
						if (error != null) { throw error; }
						// Go back to old lines, without undo flag
						return DocUpdaterClient.setDocLines(this.project_id, this.doc_id, this.lines, this.source, this.user_id, false, (error, res, body) => {
							this.statusCode = res.statusCode;
							return setTimeout(done, 200);
						});
					});
				});
				return null;
			});

			after(function() {
				MockTrackChangesApi.flushDoc.reset();
				MockProjectHistoryApi.flushProject.reset();
				return MockWebApi.setDocument.reset();
			});

			return it("should not undo the tracked changes", function(done) {
				DocUpdaterClient.getDoc(this.project_id, this.doc_id, (error, res, data) => {
					if (error != null) { throw error; }
					const {
                        ranges
                    } = data;
					expect(ranges.changes.length).to.equal(1);
					return done();
				});
				return null;
			});
		});
	});
});