const should = require('should');
const sinon = require('sinon');
const moment = require('moment');
const _ = require('lodash');
const bodyParser = require('body-parser');
const http = require('http');
const express = require('../../../../core/shared/express');
const SchedulingDefault = require('../../../../core/server/adapters/scheduling/SchedulingDefault');

describe('Scheduling Default Adapter', function () {
    const scope = {};

    beforeEach(function () {
        scope.adapter = new SchedulingDefault();
    });

    afterEach(function () {
        sinon.restore();
    });

    describe('success', function () {
        it('addJob (schedule)', function () {
            sinon.stub(scope.adapter, 'run');
            sinon.stub(scope.adapter, '_execute');

            const dates = [
                moment().add(1, 'day').subtract(30, 'seconds').toDate(),
                moment().add(7, 'minutes').toDate(),

                // over 10minutes offset
                moment().add(12, 'minutes').toDate(),
                moment().add(20, 'minutes').toDate(),
                moment().add(15, 'minutes').toDate(),
                moment().add(15, 'minutes').add(10, 'seconds').toDate(),
                moment().add(15, 'minutes').subtract(30, 'seconds').toDate(),
                moment().add(50, 'seconds').toDate()
            ];

            dates.forEach(function (time) {
                scope.adapter._addJob({
                    time: time,
                    url: 'something'
                });
            });

            // 2 jobs get immediately executed
            should.not.exist(scope.adapter.allJobs[moment(dates[1]).valueOf()]);
            should.not.exist(scope.adapter.allJobs[moment(dates[7]).valueOf()]);
            scope.adapter._execute.calledTwice.should.eql(true);

            Object.keys(scope.adapter.allJobs).length.should.eql(dates.length - 2);
            Object.keys(scope.adapter.allJobs).should.eql([
                moment(dates[2]).valueOf().toString(),
                moment(dates[6]).valueOf().toString(),
                moment(dates[4]).valueOf().toString(),
                moment(dates[5]).valueOf().toString(),
                moment(dates[3]).valueOf().toString(),
                moment(dates[0]).valueOf().toString()
            ]);
        });

        it('reschedule: default', function (done) {
            sinon.stub(scope.adapter, '_pingUrl');

            const time = moment().add(20, 'milliseconds').valueOf();

            scope.adapter.schedule({
                time: time,
                url: 'something',
                extra: {
                    oldTime: null,
                    method: 'PUT'
                }
            });

            /**Reschedule is now unschedule+schedule */
            scope.adapter.unschedule({
                time: time,
                url: 'something',
                extra: {
                    oldTime: time,
                    method: 'PUT'
                }
            });
            scope.adapter.schedule({
                time: time,
                url: 'something',
                extra: {
                    oldTime: null,
                    method: 'PUT'
                }
            });

            setTimeout(() => {
                scope.adapter._pingUrl.calledOnce.should.eql(true);
                done();
            }, 50);
        });

        it('reschedule: simulate restart', function (done) {
            sinon.stub(scope.adapter, '_pingUrl');

            const time = moment().add(20, 'milliseconds').valueOf();

            scope.adapter.unschedule({
                time: time,
                url: 'something',
                extra: {
                    oldTime: time,
                    method: 'PUT'
                }
            }, {bootstrap: true});

            scope.adapter.schedule({
                time: time,
                url: 'something',
                extra: {
                    oldTime: null,
                    method: 'PUT'
                }
            });

            setTimeout(() => {
                scope.adapter._pingUrl.calledOnce.should.eql(true);
                done();
            }, 50);
        });

        it('run', function (done) {
            // 1000 jobs, but only the number x are under 1 minute
            const timestamps = _.map(_.range(1000), function (i) {
                return moment().add(i, 'seconds').valueOf();
            });

            const allJobs = {};

            sinon.stub(scope.adapter, '_execute').callsFake(function (nextJobs) {
                Object.keys(nextJobs).length.should.eql(121);
                Object.keys(scope.adapter.allJobs).length.should.eql(1000 - 121);
                done();
            });

            timestamps.forEach(function (timestamp) {
                allJobs[timestamp] = [{url: 'xxx'}];
            });

            scope.adapter.allJobs = allJobs;
            scope.adapter.runTimeoutInMs = 100;
            scope.adapter.offsetInMinutes = 1;
            scope.adapter.run();
        });

        it('ensure recursive run works', function (done) {
            sinon.spy(scope.adapter, '_execute');

            scope.adapter.allJobs = {};
            scope.adapter.runTimeoutInMs = 10;
            scope.adapter.offsetInMinutes = 1;
            scope.adapter.run();

            setTimeout(function () {
                scope.adapter._execute.callCount.should.be.greaterThan(1);
                done();
            }, 30);
        });

        it('execute', function (done) {
            let pinged = 0;
            const jobs = 3;

            const timestamps = _.map(_.range(jobs), function (i) {
                return moment().add(i * 50, 'milliseconds').valueOf();
            });

            const nextJobs = {};

            sinon.stub(scope.adapter, 'run');
            sinon.stub(scope.adapter, '_pingUrl').callsFake(function () {
                pinged = pinged + 1;
            });

            timestamps.forEach(function (timestamp) {
                nextJobs[timestamp] = [{url: 'xxx'}];
            });

            scope.adapter._execute(nextJobs);

            (function retry() {
                if (pinged !== jobs) {
                    return setTimeout(retry, 50);
                }

                done();
            })();
        });

        it('delete job (unschedule)', function (done) {
            let pinged = 0;
            const jobsToDelete = {};
            const jobsToExecute = {};

            sinon.stub(scope.adapter, 'run');
            sinon.stub(scope.adapter, '_pingUrl').callsFake(function () {
                pinged = pinged + 1;
            });

            // add jobs to delete
            jobsToDelete[moment().add(10, 'milliseconds').valueOf()] = [{url: '/1', time: 1234}];
            jobsToDelete[moment().add(20, 'milliseconds').valueOf()] = [{url: '/2', time: 1235}];
            jobsToDelete[moment().add(30, 'milliseconds').valueOf()] = [{url: '/1', time: 1234}];
            jobsToDelete[moment().add(40, 'milliseconds').valueOf()] = [{url: '/3', time: 1236}];

            _.map(jobsToDelete, function (value) {
                scope.adapter._deleteJob(value[0]);
            });

            // add jobs, which will be pinged
            jobsToExecute[moment().add(50, 'milliseconds').valueOf()] = [{url: '/1', time: 1234}];
            jobsToExecute[moment().add(60, 'milliseconds').valueOf()] = [{url: '/1', time: 1234}];
            jobsToExecute[moment().add(70, 'milliseconds').valueOf()] = [{url: '/1', time: 1234}];
            jobsToExecute[moment().add(80, 'milliseconds').valueOf()] = [{url: '/4', time: 1237}];

            // simulate execute is called
            scope.adapter._execute(jobsToExecute);

            (function retry() {
                if (pinged !== 2) {
                    return setTimeout(retry, 50);
                }

                Object.keys(scope.adapter.deletedJobs).length.should.eql(2);
                pinged.should.eql(2);
                done();
            })();
        });

        it('delete job (unschedule): time is null', function () {
            scope.adapter._deleteJob({time: null, url: '/test'});
            Object.keys(scope.adapter.deletedJobs).length.should.eql(0);
        });

        it('pingUrl (PUT)', function (done) {
            const app = express();
            const server = http.createServer(app);
            let wasPinged = false;
            let reqBody;

            app.use(bodyParser.json());

            app.put('/ping', function (req, res) {
                wasPinged = true;
                reqBody = req.body;
                res.sendStatus(200);
            });

            server.listen(1111);

            scope.adapter._pingUrl({
                url: 'http://localhost:1111/ping',
                time: moment().add(1, 'second').valueOf(),
                extra: {
                    httpMethod: 'PUT'
                }
            });

            (function retry() {
                if (wasPinged) {
                    should.not.exist(reqBody.force);
                    return server.close(done);
                }

                setTimeout(retry, 100);
            })();
        });

        it('pingUrl (GET)', function (done) {
            const app = express();
            const server = http.createServer(app);
            let wasPinged = false;
            let reqQuery;

            app.get('/ping', function (req, res) {
                wasPinged = true;
                reqQuery = req.query;
                res.sendStatus(200);
            });

            server.listen(1111);

            scope.adapter._pingUrl({
                url: 'http://localhost:1111/ping',
                time: moment().add(1, 'second').valueOf(),
                extra: {
                    httpMethod: 'GET'
                }
            }).then(() => {
                wasPinged.should.be.true();
                should.not.exist(reqQuery.force);
                server.close(done);
            });
        });

        it('pingUrl (PUT, and detect publish in the past)', function (done) {
            const app = express();
            const server = http.createServer(app);
            let wasPinged = false;
            let reqBody;

            app.use(bodyParser.json());

            app.put('/ping', function (req, res) {
                wasPinged = true;
                reqBody = req.body;
                res.sendStatus(200);
            });

            server.listen(1111);

            scope.adapter._pingUrl({
                url: 'http://localhost:1111/ping',
                time: moment().subtract(10, 'minutes').valueOf(),
                extra: {
                    httpMethod: 'PUT'
                }
            }).then(() => {
                wasPinged.should.be.true();
                should.exist(reqBody.force);
                server.close(done);
            });
        });

        it('pingUrl (GET, and detect publish in the past)', function (done) {
            const app = express();
            const server = http.createServer(app);
            let wasPinged = false;
            let reqQuery;

            app.get('/ping', function (req, res) {
                wasPinged = true;
                reqQuery = req.query;
                res.sendStatus(200);
            });

            server.listen(1111);

            scope.adapter._pingUrl({
                url: 'http://localhost:1111/ping',
                time: moment().subtract(10, 'minutes').valueOf(),
                extra: {
                    httpMethod: 'GET'
                }
            }).then(() => {
                wasPinged.should.be.true();
                should.exist(reqQuery.force);
                server.close(done);
            });
        });

        it('pingUrl, but blog returns 503', function (done) {
            const app = express();
            const server = http.createServer(app);
            let returned500Count = 0;
            let returned200 = false;
            let reqBody;

            scope.adapter.retryTimeoutInMs = 10;

            app.use(bodyParser.json());
            app.put('/ping', function (req, res) {
                reqBody = req.body;

                if (returned500Count === 5) {
                    returned200 = true;
                    return res.sendStatus(200);
                }

                returned500Count = returned500Count + 1;
                res.sendStatus(503);
            });

            server.listen(1111);

            scope.adapter._pingUrl({
                url: 'http://localhost:1111/ping',
                time: moment().valueOf(),
                extra: {
                    httpMethod: 'PUT'
                }
            });

            (function retry() {
                if (returned200) {
                    should.exist(reqBody.force);
                    return server.close(done);
                }

                setTimeout(retry, 50);
            })();
        });
    });
});