/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const chai = require('chai');
const {
    expect
} = chai;
const should = chai.should();
const sinon = require("sinon");
const modulePath = "../../../app/js/RoomManager.js";
const SandboxedModule = require('sandboxed-module');

describe('RoomManager', function() {
	beforeEach(function() {
		this.project_id = "project-id-123";
		this.doc_id = "doc-id-456";
		this.other_doc_id = "doc-id-789";
		this.client = {namespace: {name: ''}, id: "first-client"};
		this.RoomManager = SandboxedModule.require(modulePath, { requires: {
			"settings-sharelatex": (this.settings = {}),
			"logger-sharelatex": (this.logger = { log: sinon.stub(), warn: sinon.stub(), error: sinon.stub() }),
			"metrics-sharelatex": (this.metrics = { gauge: sinon.stub() })
		}
	});
		this.RoomManager._clientsInRoom = sinon.stub();
		this.RoomManager._clientAlreadyInRoom = sinon.stub();
		this.RoomEvents = this.RoomManager.eventSource();
		sinon.spy(this.RoomEvents, 'emit');
		return sinon.spy(this.RoomEvents, 'once');
	});
	
	describe("emitOnCompletion", () => describe("when a subscribe errors", function() {
        afterEach(function() {
            return process.removeListener("unhandledRejection", this.onUnhandled);
        });

        beforeEach(function(done) {
            this.onUnhandled = error => {
                this.unhandledError = error;
                return done(new Error(`unhandledRejection: ${error.message}`));
            };
            process.on("unhandledRejection", this.onUnhandled);

            let reject = undefined;
            const subscribePromise = new Promise((_, r) => reject = r);
            const promises = [subscribePromise];
            const eventName = "project-subscribed-123";
            this.RoomEvents.once(eventName, () => setTimeout(done, 100));
            this.RoomManager.emitOnCompletion(promises, eventName);
            return setTimeout(() => reject(new Error("subscribe failed")));
        });

        return it("should keep going", function() {
            return expect(this.unhandledError).to.not.exist;
        });
    }));

	describe("joinProject", function() {
	
		describe("when the project room is empty", function() {

			beforeEach(function(done) {
				this.RoomManager._clientsInRoom
					.withArgs(this.client, this.project_id)
					.onFirstCall().returns(0);
				this.client.join = sinon.stub();
				this.callback = sinon.stub();
				this.RoomEvents.on('project-active', id => {
					return setTimeout(() => {
						return this.RoomEvents.emit(`project-subscribed-${id}`);
					}
					, 100);
				});
				return this.RoomManager.joinProject(this.client, this.project_id, err => {
					this.callback(err);
					return done();
				});
			});

			it("should emit a 'project-active' event with the id", function() {
				return this.RoomEvents.emit.calledWithExactly('project-active', this.project_id).should.equal(true);
			});

			it("should listen for the 'project-subscribed-id' event", function() {
				return this.RoomEvents.once.calledWith(`project-subscribed-${this.project_id}`).should.equal(true);
			});

			return it("should join the room using the id", function() {
				return this.client.join.calledWithExactly(this.project_id).should.equal(true);
			});
		});

		return describe("when there are other clients in the project room", function() {

			beforeEach(function() {
				this.RoomManager._clientsInRoom
					.withArgs(this.client, this.project_id)
					.onFirstCall().returns(123)
					.onSecondCall().returns(124);
				this.client.join = sinon.stub();
				return this.RoomManager.joinProject(this.client, this.project_id);
			});

			it("should join the room using the id", function() {
				return this.client.join.called.should.equal(true);
			});

			return it("should not emit any events", function() {
				return this.RoomEvents.emit.called.should.equal(false);
			});
		});
	});


	describe("joinDoc", function() {

		describe("when the doc room is empty", function() {

			beforeEach(function(done) {
				this.RoomManager._clientsInRoom
					.withArgs(this.client, this.doc_id)
					.onFirstCall().returns(0);
				this.client.join = sinon.stub();
				this.callback = sinon.stub();
				this.RoomEvents.on('doc-active', id => {
					return setTimeout(() => {
						return this.RoomEvents.emit(`doc-subscribed-${id}`);
					}
					, 100);
				});
				return this.RoomManager.joinDoc(this.client, this.doc_id, err => {
					this.callback(err);
					return done();
				});
			});

			it("should emit a 'doc-active' event with the id", function() {
				return this.RoomEvents.emit.calledWithExactly('doc-active', this.doc_id).should.equal(true);
			});

			it("should listen for the 'doc-subscribed-id' event", function() {
				return this.RoomEvents.once.calledWith(`doc-subscribed-${this.doc_id}`).should.equal(true);
			});

			return it("should join the room using the id", function() {
				return this.client.join.calledWithExactly(this.doc_id).should.equal(true);
			});
		});

		return describe("when there are other clients in the doc room", function() {

			beforeEach(function() {
				this.RoomManager._clientsInRoom
					.withArgs(this.client, this.doc_id)
					.onFirstCall().returns(123)
					.onSecondCall().returns(124);
				this.client.join = sinon.stub();
				return this.RoomManager.joinDoc(this.client, this.doc_id);
			});

			it("should join the room using the id", function() {
				return this.client.join.called.should.equal(true);
			});

			return it("should not emit any events", function() {
				return this.RoomEvents.emit.called.should.equal(false);
			});
		});
	});


	describe("leaveDoc", function() {

		describe("when doc room will be empty after this client has left", function() {

			beforeEach(function() {
				this.RoomManager._clientAlreadyInRoom
					.withArgs(this.client, this.doc_id)
					.returns(true);
				this.RoomManager._clientsInRoom
					.withArgs(this.client, this.doc_id)
					.onCall(0).returns(0);
				this.client.leave = sinon.stub();
				return this.RoomManager.leaveDoc(this.client, this.doc_id);
			});

			it("should leave the room using the id", function() {
				return this.client.leave.calledWithExactly(this.doc_id).should.equal(true);
			});

			return it("should emit a 'doc-empty' event with the id", function() {
				return this.RoomEvents.emit.calledWithExactly('doc-empty', this.doc_id).should.equal(true);
			});
		});


		describe("when there are other clients in the doc room", function() {

			beforeEach(function() {
				this.RoomManager._clientAlreadyInRoom
					.withArgs(this.client, this.doc_id)
					.returns(true);
				this.RoomManager._clientsInRoom
					.withArgs(this.client, this.doc_id)
					.onCall(0).returns(123);
				this.client.leave = sinon.stub();
				return this.RoomManager.leaveDoc(this.client, this.doc_id);
			});

			it("should leave the room using the id", function() {
				return this.client.leave.calledWithExactly(this.doc_id).should.equal(true);
			});

			return it("should not emit any events", function() {
				return this.RoomEvents.emit.called.should.equal(false);
			});
		});

		return describe("when the client is not in the doc room", function() {

			beforeEach(function() {
				this.RoomManager._clientAlreadyInRoom
					.withArgs(this.client, this.doc_id)
					.returns(false);
				this.RoomManager._clientsInRoom
					.withArgs(this.client, this.doc_id)
					.onCall(0).returns(0);
				this.client.leave = sinon.stub();
				return this.RoomManager.leaveDoc(this.client, this.doc_id);
			});

			it("should not leave the room", function() {
				return this.client.leave.called.should.equal(false);
			});

			return it("should not emit any events", function() {
				return this.RoomEvents.emit.called.should.equal(false);
			});
		});
	});


	return describe("leaveProjectAndDocs", () => describe("when the client is connected to the project and multiple docs", function() {

        beforeEach(function() {
            this.RoomManager._roomsClientIsIn = sinon.stub().returns([this.project_id, this.doc_id, this.other_doc_id]);
            this.client.join = sinon.stub();
            return this.client.leave = sinon.stub();
        });

        describe("when this is the only client connected", function() {

            beforeEach(function(done) {
                // first call is for the join,
                // second for the leave
                this.RoomManager._clientsInRoom
                    .withArgs(this.client, this.doc_id)
                    .onCall(0).returns(0)
                    .onCall(1).returns(0);
                this.RoomManager._clientsInRoom
                    .withArgs(this.client, this.other_doc_id)
                    .onCall(0).returns(0)
                    .onCall(1).returns(0);
                this.RoomManager._clientsInRoom
                    .withArgs(this.client, this.project_id)
                    .onCall(0).returns(0)
                    .onCall(1).returns(0);
                this.RoomManager._clientAlreadyInRoom
                    .withArgs(this.client, this.doc_id)
                    .returns(true)
                    .withArgs(this.client, this.other_doc_id)
                    .returns(true)
                    .withArgs(this.client, this.project_id)
                    .returns(true);
                this.RoomEvents.on('project-active', id => {
                    return setTimeout(() => {
                        return this.RoomEvents.emit(`project-subscribed-${id}`);
                    }
                    , 100);
                });
                this.RoomEvents.on('doc-active', id => {
                    return setTimeout(() => {
                        return this.RoomEvents.emit(`doc-subscribed-${id}`);
                    }
                    , 100);
                });
                // put the client in the rooms
                return this.RoomManager.joinProject(this.client, this.project_id, () => {
                    return this.RoomManager.joinDoc(this.client, this.doc_id, () => {
                        return this.RoomManager.joinDoc(this.client, this.other_doc_id, () => {
                            // now leave the project
                            this.RoomManager.leaveProjectAndDocs(this.client);
                            return done();
                        });
                    });
                });
            });

            it("should leave all the docs", function() {
                this.client.leave.calledWithExactly(this.doc_id).should.equal(true);
                return this.client.leave.calledWithExactly(this.other_doc_id).should.equal(true);
            });

            it("should leave the project", function() {
                return this.client.leave.calledWithExactly(this.project_id).should.equal(true);
            });

            it("should emit a 'doc-empty' event with the id for each doc", function() {
                this.RoomEvents.emit.calledWithExactly('doc-empty', this.doc_id).should.equal(true);
                return this.RoomEvents.emit.calledWithExactly('doc-empty', this.other_doc_id).should.equal(true);
            });

            return it("should emit a 'project-empty' event with the id for the project", function() {
                return this.RoomEvents.emit.calledWithExactly('project-empty', this.project_id).should.equal(true);
            });
        });

        return describe("when other clients are still connected", function() {

            beforeEach(function() {
                this.RoomManager._clientsInRoom
                    .withArgs(this.client, this.doc_id)
                    .onFirstCall().returns(123)
                    .onSecondCall().returns(122);
                this.RoomManager._clientsInRoom
                    .withArgs(this.client, this.other_doc_id)
                    .onFirstCall().returns(123)
                    .onSecondCall().returns(122);
                this.RoomManager._clientsInRoom
                    .withArgs(this.client, this.project_id)
                    .onFirstCall().returns(123)
                    .onSecondCall().returns(122);
                this.RoomManager._clientAlreadyInRoom
                    .withArgs(this.client, this.doc_id)
                    .returns(true)
                    .withArgs(this.client, this.other_doc_id)
                    .returns(true)
                    .withArgs(this.client, this.project_id)
                    .returns(true);
                return this.RoomManager.leaveProjectAndDocs(this.client);
            });

            it("should leave all the docs", function() {
                this.client.leave.calledWithExactly(this.doc_id).should.equal(true);
                return this.client.leave.calledWithExactly(this.other_doc_id).should.equal(true);
            });

            it("should leave the project", function() {
                return this.client.leave.calledWithExactly(this.project_id).should.equal(true);
            });

            return it("should not emit any events", function() {
                return this.RoomEvents.emit.called.should.equal(false);
            });
        });
    }));
});