/* eslint-disable
    handle-callback-err,
    no-unused-vars,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * 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 mongojs = require("../../../app/js/mongojs");
const { ObjectId } = mongojs;
const Settings = require("settings-sharelatex");
const request = require("request");
const rclient = require("redis").createClient(Settings.redis.history); // Only works locally for now

const TrackChangesApp = require("./helpers/TrackChangesApp");
const TrackChangesClient = require("./helpers/TrackChangesClient");
const MockWebApi = require("./helpers/MockWebApi");

describe("Appending doc ops to the history", function() {
	before(function(done) { return TrackChangesApp.ensureRunning(done); });

	describe("when the history does not exist yet", function() {
		before(function(done) {
			this.project_id = ObjectId().toString();
			this.doc_id = ObjectId().toString();
			this.user_id = ObjectId().toString();
			MockWebApi.projects[this.project_id] = {features: {versioning: false}};
			TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
				op: [{ i: "f", p: 3 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 3
			}, {
				op: [{ i: "o", p: 4 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 4
			}, {
				op: [{ i: "o", p: 5 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 5
			}], error => {
				if (error != null) { throw error; }
				return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
					this.updates = updates;
					if (error != null) { throw error; }
					return done();
				});
			});
			return null;
		});

		it("should insert the compressed op into mongo", function() {
			return expect(this.updates[0].pack[0].op).to.deep.equal([{
				p: 3, i: "foo"
			}]);
	});

		it("should insert the correct version number into mongo", function() {
			return expect(this.updates[0].v).to.equal(5);
		});

		it("should store the doc id", function() {
			return expect(this.updates[0].doc_id.toString()).to.equal(this.doc_id);
		});

		it("should store the project id", function() {
			return expect(this.updates[0].project_id.toString()).to.equal(this.project_id);
		});

		return it("should clear the doc from the DocsWithHistoryOps set", function(done) {
			rclient.sismember(`DocsWithHistoryOps:${this.project_id}`, this.doc_id, (error, member) => {
				member.should.equal(0);
				return done();
			});
			return null;
		});
	});

	describe("when the history has already been started", function() {
		beforeEach(function(done) {
			this.project_id = ObjectId().toString();
			this.doc_id = ObjectId().toString();
			this.user_id = ObjectId().toString();
			MockWebApi.projects[this.project_id] = {features: {versioning: false}};
			TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
				op: [{ i: "f", p: 3 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 3
			}, {
				op: [{ i: "o", p: 4 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 4
			}, {
				op: [{ i: "o", p: 5 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 5
			}], error => {
				if (error != null) { throw error; }
				return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
					if (error != null) { throw error; }
					return done();
				});
			});
			return null;
		});

		describe("when the updates are recent and from the same user", function() {
			beforeEach(function(done) {
				TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
					op: [{ i: "b", p: 6 }],
					meta: { ts: Date.now(), user_id: this.user_id },
					v: 6
				}, {
					op: [{ i: "a", p: 7 }],
					meta: { ts: Date.now(), user_id: this.user_id },
					v: 7
				}, {
					op: [{ i: "r", p: 8 }],
					meta: { ts: Date.now(), user_id: this.user_id },
					v: 8
				}], error => {
					if (error != null) { throw error; }
					return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
						this.updates = updates;
						if (error != null) { throw error; }
						return done();
					});
				});
				return null;
			});

			it("should combine all the updates into one pack", function() {
				return expect(this.updates[0].pack[1].op).to.deep.equal([{
					p: 6, i: "bar"
				}]);
		});

			return it("should insert the correct version number into mongo", function() {
				return expect(this.updates[0].v_end).to.equal(8);
			});
		});


		return describe("when the updates are far apart", function() {
			beforeEach(function(done) {
				const oneDay = 24 * 60 * 60 * 1000;
				TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
					op: [{ i: "b", p: 6 }],
					meta: { ts: Date.now() + oneDay, user_id: this.user_id },
					v: 6
				}, {
					op: [{ i: "a", p: 7 }],
					meta: { ts: Date.now() + oneDay, user_id: this.user_id },
					v: 7
				}, {
					op: [{ i: "r", p: 8 }],
					meta: { ts: Date.now() + oneDay, user_id: this.user_id },
					v: 8
				}], error => {
					if (error != null) { throw error; }
					return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
						this.updates = updates;
						if (error != null) { throw error; }
						return done();
					});
				});
				return null;
			});

			return it("should combine the updates into one pack", function() {
				expect(this.updates[0].pack[0].op).to.deep.equal([{
					p: 3, i: "foo"
				}]);
				return expect(this.updates[0].pack[1].op).to.deep.equal([{
					p: 6, i: "bar"
				}]);
		});
	});
});

	describe("when the updates need processing in batches", function() {
		before(function(done) {
			this.project_id = ObjectId().toString();
			this.doc_id = ObjectId().toString();
			this.user_id = ObjectId().toString();
			MockWebApi.projects[this.project_id] = {features: {versioning: false}};
			const updates = [];
			this.expectedOp = [{ p:0, i: "" }];
			for (let i = 0; i <= 250; i++) {
				updates.push({
					op: [{i: "a", p: 0}],
					meta: { ts: Date.now(), user_id: this.user_id },
					v: i
				});
				this.expectedOp[0].i = `a${this.expectedOp[0].i}`;
			}

			TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, updates, error => {
				if (error != null) { throw error; }
				return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates1) => {
					this.updates = updates1;
					if (error != null) { throw error; }
					return done();
				});
			});
			return null;
		});

		it("should concat the compressed op into mongo", function() {
			return expect(this.updates[0].pack.length).to.deep.equal(3);
		});  // batch size is 100

		return it("should insert the correct version number into mongo", function() {
			return expect(this.updates[0].v_end).to.equal(250);
		});
	});


	describe("when there are multiple ops in each update", function() {
		before(function(done) {
			this.project_id = ObjectId().toString();
			this.doc_id = ObjectId().toString();
			this.user_id = ObjectId().toString();
			MockWebApi.projects[this.project_id] = {features: {versioning: false}};
			const oneDay = 24 * 60 * 60 * 1000;
			TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
				op: [{ i: "f", p: 3 }, { i: "o", p: 4 }, { i: "o", p: 5 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 3
			}, {
				op: [{ i: "b", p: 6 }, { i: "a", p: 7 }, { i: "r", p: 8 }],
				meta: { ts: Date.now() + oneDay, user_id: this.user_id },
				v: 4
			}], error => {
				if (error != null) { throw error; }
				return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
					this.updates = updates;
					if (error != null) { throw error; }
					return done();
				});
			});
			return null;
		});

		it("should insert the compressed ops into mongo", function() {
			expect(this.updates[0].pack[0].op).to.deep.equal([{
				p: 3, i: "foo"
			}]);
			return expect(this.updates[0].pack[1].op).to.deep.equal([{
				p: 6, i: "bar"
			}]);
	});

		return it("should insert the correct version numbers into mongo", function() {
			expect(this.updates[0].pack[0].v).to.equal(3);
			return expect(this.updates[0].pack[1].v).to.equal(4);
		});
	});

	describe("when there is a no-op update", function() {
		before(function(done) {
			this.project_id = ObjectId().toString();
			this.doc_id = ObjectId().toString();
			this.user_id = ObjectId().toString();
			MockWebApi.projects[this.project_id] = {features: {versioning: false}};
			const oneDay = 24 * 60 * 60 * 1000;
			TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
				op: [],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 3
			}, {
				op: [{ i: "foo", p: 3 }],
				meta: { ts: Date.now() + oneDay, user_id: this.user_id },
				v: 4
			}], error => {
				if (error != null) { throw error; }
				return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
					this.updates = updates;
					if (error != null) { throw error; }
					return done();
				});
			});
			return null;
		});

		it("should insert the compressed no-op into mongo", function() {
			return expect(this.updates[0].pack[0].op).to.deep.equal([]);
	});


		it("should insert the compressed next update into mongo", function() {
			return expect(this.updates[0].pack[1].op).to.deep.equal([{
				p: 3, i: "foo"
			}]);
	});

		return it("should insert the correct version numbers into mongo", function() {
			expect(this.updates[0].pack[0].v).to.equal(3);
			return expect(this.updates[0].pack[1].v).to.equal(4);
		});
	});

	describe("when there is a comment update", function() {
		before(function(done) {
			this.project_id = ObjectId().toString();
			this.doc_id = ObjectId().toString();
			this.user_id = ObjectId().toString();
			MockWebApi.projects[this.project_id] = {features: {versioning: false}};
			TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
				op: [{ c: "foo", p: 3 }, {d: "bar", p: 6}],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 3
			}], error => {
				if (error != null) { throw error; }
				return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
					this.updates = updates;
					if (error != null) { throw error; }
					return done();
				});
			});
			return null;
		});

		it("should ignore the comment op", function() {
			return expect(this.updates[0].pack[0].op).to.deep.equal([{d: "bar", p: 6}]);
	});

		return it("should insert the correct version numbers into mongo", function() {
			return expect(this.updates[0].pack[0].v).to.equal(3);
		});
	});

	describe("when the project has versioning enabled", function() {
		before(function(done) {
			this.project_id = ObjectId().toString();
			this.doc_id = ObjectId().toString();
			this.user_id = ObjectId().toString();
			MockWebApi.projects[this.project_id] = {features: {versioning: true}};

			TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
				op: [{ i: "f", p: 3 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 3
			}], error => {
				if (error != null) { throw error; }
				return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
					this.updates = updates;
					if (error != null) { throw error; }
					return done();
				});
			});
			return null;
		});

		return it("should not add a expiresAt entry in the update in mongo", function() {
			return expect(this.updates[0].expiresAt).to.be.undefined;
		});
	});

	return describe("when the project does not have versioning enabled", function() {
		before(function(done) {
			this.project_id = ObjectId().toString();
			this.doc_id = ObjectId().toString();
			this.user_id = ObjectId().toString();
			MockWebApi.projects[this.project_id] = {features: {versioning: false}};

			TrackChangesClient.pushRawUpdates(this.project_id, this.doc_id, [{
				op: [{ i: "f", p: 3 }],
				meta: { ts: Date.now(), user_id: this.user_id },
				v: 3
			}], error => {
				if (error != null) { throw error; }
				return TrackChangesClient.flushAndGetCompressedUpdates(this.project_id, this.doc_id, (error, updates) => {
					this.updates = updates;
					if (error != null) { throw error; }
					return done();
				});
			});
			return null;
		});

		return it("should add a expiresAt entry in the update in mongo", function() {
			return expect(this.updates[0].expiresAt).to.exist;
		});
	});
});