/*
 * 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 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("Deleting 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"];

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

	after(function() {
		MockTrackChangesApi.flushDoc.restore();
		return MockProjectHistoryApi.flushProject.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()]);
			sinon.spy(MockWebApi, "setDocument");
			sinon.spy(MockWebApi, "getDocument");

			MockWebApi.insertDoc(this.project_id, this.doc_id, {lines: this.lines, version: this.version});
			return 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.deleteDoc(this.project_id, this.doc_id, (error, res, body) => {
							this.statusCode = res.statusCode;
							return setTimeout(done, 200);
						});
					}
					, 200);
				});
			});
		});

		after(function() {
			MockWebApi.setDocument.restore();
			return MockWebApi.getDocument.restore();
		});

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

		it("should send the updated document 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);
		});

		it("should need to reload the doc if read again", function(done) {
			MockWebApi.getDocument.called.should.equal.false;
			return DocUpdaterClient.getDoc(this.project_id, this.doc_id, (error, res, doc) => {
				MockWebApi.getDocument
					.calledWith(this.project_id, this.doc_id)
					.should.equal(true);
				return done();
			});
		});

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

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

	return describe("when the doc is not 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");
			sinon.spy(MockWebApi, "getDocument");
			return DocUpdaterClient.deleteDoc(this.project_id, this.doc_id, (error, res, body) => {
				this.statusCode = res.statusCode;
				return setTimeout(done, 200);
			});
		});

		after(function() {
			MockWebApi.setDocument.restore();
			return MockWebApi.getDocument.restore();
		});

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

		it("should not need to send the updated document to the web api", () => MockWebApi.setDocument.called.should.equal(false));

		it("should need to reload the doc if read again", function(done) {
			MockWebApi.getDocument.called.should.equal.false;
			return DocUpdaterClient.getDoc(this.project_id, this.doc_id, (error, res, doc) => {
				MockWebApi.getDocument
					.calledWith(this.project_id, this.doc_id)
					.should.equal(true);
				return done();
			});
		});

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

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