/* jshint expr:true */
import sinon from 'sinon';
import {expect} from 'chai';
import {describe, it} from 'mocha';
import {setupComponentTest} from 'ember-mocha';
import hbs from 'htmlbars-inline-precompile';
import Pretender from 'pretender';
import wait from 'ember-test-helpers/wait';
import {createFile, fileUpload} from '../../helpers/file-upload';
import $ from 'jquery';
import run from 'ember-runloop';
import Service from 'ember-service';
import {UnsupportedMediaTypeError} from 'ghost-admin/services/ajax';

const keyCodes = {
    enter: 13
};

const configStub = Service.extend({
    fileStorage: true
});

const notificationsStub = Service.extend({
    showAPIError(/* error, options */) {
        // noop - to be stubbed
    }
});

const sessionStub = Service.extend({
    isAuthenticated: false,
    authorize(authorizer, block) {
        if (this.get('isAuthenticated')) {
            block('Authorization', 'Bearer token');
        }
    }
});

const stubSuccessfulUpload = function (server, delay = 0) {
    server.post('/ghost/api/v0.1/uploads/', function () {
        return [200, {'Content-Type': 'application/json'}, '"/content/images/test.png"'];
    }, delay);
};

const stubFailedUpload = function (server, code, error, delay = 0) {
    server.post('/ghost/api/v0.1/uploads/', function () {
        return [code, {'Content-Type': 'application/json'}, JSON.stringify({
            errors: [{
                errorType: error,
                message: `Error: ${error}`
            }]
        })];
    }, delay);
};

describe('Integration: Component: gh-image-uploader', function() {
    setupComponentTest('gh-image-upload', {
        integration: true
    });

    let server;

    beforeEach(function () {
        this.register('service:config', configStub);
        this.register('service:session', sessionStub);
        this.register('service:notifications', notificationsStub);
        this.inject.service('config', {as: 'configService'});
        this.inject.service('session', {as: 'sessionService'});
        this.inject.service('notifications', {as: 'notifications'});
        this.set('update', function () {});
        server = new Pretender();
    });

    afterEach(function () {
        server.shutdown();
    });

    it('renders', function() {
        this.set('image', 'http://example.com/test.png');
        this.render(hbs`{{gh-image-uploader image=image}}`);
        expect(this.$()).to.have.length(1);
    });

    it('defaults to upload form', function () {
        this.render(hbs`{{gh-image-uploader image=image}}`);
        expect(this.$('input[type="file"]').length).to.equal(1);
    });

    it('defaults to url form with no filestorage config', function () {
        this.set('configService.fileStorage', false);
        this.render(hbs`{{gh-image-uploader image=image}}`);
        expect(this.$('input[type="file"]').length).to.equal(0);
        expect(this.$('input[type="text"].url').length).to.equal(1);
    });

    it('can switch between form types', function () {
        this.render(hbs`{{gh-image-uploader image=image}}`);
        expect(this.$('input[type="file"]').length).to.equal(1);
        expect(this.$('input[type="text"].url').length).to.equal(0);

        this.$('a.image-url').click();

        expect(this.$('input[type="file"]').length, 'upload form is visible after switch to url form')
            .to.equal(0);
        expect(this.$('input[type="text"].url').length, 'url form is visible after switch to url form')
            .to.equal(1);

        this.$('a.image-upload').click();

        expect(this.$('input[type="file"]').length, 'upload form is visible after switch to upload form')
            .to.equal(1);
        expect(this.$('input[type="text"].url').length, 'url form is visible after switch to upload form')
            .to.equal(0);
    });

    it('triggers formChanged action when switching between forms', function () {
        let formChanged = sinon.spy();
        this.set('formChanged', formChanged);

        this.render(hbs`{{gh-image-uploader image=image formChanged=(action formChanged)}}`);

        this.$('a.image-url').click();
        this.$('a.image-upload').click();

        expect(formChanged.calledTwice).to.be.true;
        expect(formChanged.firstCall.args[0]).to.equal('url-input');
        expect(formChanged.secondCall.args[0]).to.equal('upload');
    });

    describe('file upload form', function () {
        it('renders form with supplied alt text', function () {
            this.render(hbs`{{gh-image-uploader image=image altText="text test"}}`);
            expect(this.$('.description').text().trim()).to.equal('Upload image of "text test"');
        });

        it('renders form with supplied text', function () {
            this.render(hbs`{{gh-image-uploader image=image text="text test"}}`);
            expect(this.$('.description').text().trim()).to.equal('text test');
        });

        it('generates request to correct endpoint', function (done) {
            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(server.handledRequests.length).to.equal(1);
                expect(server.handledRequests[0].url).to.equal('/ghost/api/v0.1/uploads/');
                expect(server.handledRequests[0].requestHeaders.Authorization).to.be.undefined;
                done();
            });
        });

        it('adds authentication headers to request', function (done) {
            stubSuccessfulUpload(server);

            this.get('sessionService').set('isAuthenticated', true);

            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                let [request] = server.handledRequests;
                expect(request.requestHeaders.Authorization).to.equal('Bearer token');
                done();
            });
        });

        it('fires update action on successful upload', function (done) {
            let update = sinon.spy();
            this.set('update', update);

            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(update.calledOnce).to.be.true;
                expect(update.firstCall.args[0]).to.equal('/content/images/test.png');
                done();
            });
        });

        it('doesn\'t fire update action on failed upload', function (done) {
            let update = sinon.spy();
            this.set('update', update);

            stubFailedUpload(server, 500);

            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(update.calledOnce).to.be.false;
                done();
            });
        });

        it('fires fileSelected action on file selection', function (done) {
            let fileSelected = sinon.spy();
            this.set('fileSelected', fileSelected);

            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader image=image fileSelected=(action fileSelected) update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(fileSelected.calledOnce).to.be.true;
                expect(fileSelected.args[0]).to.not.be.blank;
                done();
            });
        });

        it('fires uploadStarted action on upload start', function (done) {
            let uploadStarted = sinon.spy();
            this.set('uploadStarted', uploadStarted);

            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader image=image uploadStarted=(action uploadStarted) update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(uploadStarted.calledOnce).to.be.true;
                done();
            });
        });

        it('fires uploadFinished action on successful upload', function (done) {
            let uploadFinished = sinon.spy();
            this.set('uploadFinished', uploadFinished);

            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader image=image uploadFinished=(action uploadFinished) update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(uploadFinished.calledOnce).to.be.true;
                done();
            });
        });

        it('fires uploadFinished action on failed upload', function (done) {
            let uploadFinished = sinon.spy();
            this.set('uploadFinished', uploadFinished);

            stubFailedUpload(server);

            this.render(hbs`{{gh-image-uploader image=image uploadFinished=(action uploadFinished) update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(uploadFinished.calledOnce).to.be.true;
                done();
            });
        });

        it('displays invalid file type error', function (done) {
            stubFailedUpload(server, 415, 'UnsupportedMediaTypeError');
            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(this.$('.failed').length, 'error message is displayed').to.equal(1);
                expect(this.$('.failed').text()).to.match(/The image type you uploaded is not supported/);
                expect(this.$('.gh-btn-green').length, 'reset button is displayed').to.equal(1);
                expect(this.$('.gh-btn-green').text()).to.equal('Try Again');
                done();
            });
        });

        it('displays file too large for server error', function (done) {
            stubFailedUpload(server, 413, 'RequestEntityTooLargeError');
            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(this.$('.failed').length, 'error message is displayed').to.equal(1);
                expect(this.$('.failed').text()).to.match(/The image you uploaded was larger/);
                done();
            });
        });

        it('handles file too large error directly from the web server', function (done) {
            server.post('/ghost/api/v0.1/uploads/', function () {
                return [413, {}, ''];
            });
            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(this.$('.failed').length, 'error message is displayed').to.equal(1);
                expect(this.$('.failed').text()).to.match(/The image you uploaded was larger/);
                done();
            });
        });

        it('displays other server-side error with message', function (done) {
            stubFailedUpload(server, 400, 'UnknownError');
            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(this.$('.failed').length, 'error message is displayed').to.equal(1);
                expect(this.$('.failed').text()).to.match(/Error: UnknownError/);
                done();
            });
        });

        it('handles unknown failure', function (done) {
            server.post('/ghost/api/v0.1/uploads/', function () {
                return [500, {'Content-Type': 'application/json'}, ''];
            });
            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(this.$('.failed').length, 'error message is displayed').to.equal(1);
                expect(this.$('.failed').text()).to.match(/Something went wrong/);
                done();
            });
        });

        it('triggers notifications.showAPIError for VersionMismatchError', function (done) {
            let showAPIError = sinon.spy();
            this.set('notifications.showAPIError', showAPIError);

            stubFailedUpload(server, 400, 'VersionMismatchError');

            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(showAPIError.calledOnce).to.be.true;
                done();
            });
        });

        it('doesn\'t trigger notifications.showAPIError for other errors', function (done) {
            let showAPIError = sinon.spy();
            this.set('notifications.showAPIError', showAPIError);

            stubFailedUpload(server, 400, 'UnknownError');
            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(showAPIError.called).to.be.false;
                done();
            });
        });

        it('can be reset after a failed upload', function (done) {
            stubFailedUpload(server, 400, 'UnknownError');
            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {type: 'test.png'});

            wait().then(() => {
                run(() => {
                    this.$('.gh-btn-green').click();
                });
            });

            wait().then(() => {
                expect(this.$('input[type="file"]').length).to.equal(1);
                done();
            });
        });

        it('displays upload progress', function (done) {
            this.set('done', done);

            // pretender fires a progress event every 50ms
            stubSuccessfulUpload(server, 150);

            this.render(hbs`{{gh-image-uploader image=image uploadFinished=(action done) update=(action update)}}`);
            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            // after 75ms we should have had one progress event
            run.later(this, function () {
                expect(this.$('.progress .bar').length).to.equal(1);
                let [, percentageWidth] = this.$('.progress .bar').attr('style').match(/width: (\d+)%?/);
                expect(percentageWidth).to.be.above(0);
                expect(percentageWidth).to.be.below(100);
            }, 75);
        });

        it('handles drag over/leave', function () {
            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);

            run(() => {
                // eslint-disable-next-line new-cap
                let dragover = $.Event('dragover', {
                    dataTransfer: {
                        files: []
                    }
                });
                this.$('.gh-image-uploader').trigger(dragover);
            });

            expect(this.$('.gh-image-uploader').hasClass('-drag-over'), 'has drag-over class').to.be.true;

            run(() => {
                this.$('.gh-image-uploader').trigger('dragleave');
            });

            expect(this.$('.gh-image-uploader').hasClass('-drag-over'), 'has drag-over class').to.be.false;
        });

        it('triggers file upload on file drop', function (done) {
            let uploadSuccess = sinon.spy();
            // eslint-disable-next-line new-cap
            let drop = $.Event('drop', {
                dataTransfer: {
                    files: [createFile(['test'], {name: 'test.png'})]
                }
            });

            this.set('uploadSuccess', uploadSuccess);

            stubSuccessfulUpload(server);
            this.render(hbs`{{gh-image-uploader uploadSuccess=(action uploadSuccess)}}`);

            run(() => {
                this.$('.gh-image-uploader').trigger(drop);
            });

            wait().then(() => {
                expect(uploadSuccess.calledOnce).to.be.true;
                expect(uploadSuccess.firstCall.args[0]).to.equal('/content/images/test.png');
                done();
            });
        });

        it('validates extension by default', function (done) {
            let uploadSuccess = sinon.spy();
            let uploadFailed = sinon.spy();

            this.set('uploadSuccess', uploadSuccess);
            this.set('uploadFailed', uploadFailed);

            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader
                uploadSuccess=(action uploadSuccess)
                uploadFailed=(action uploadFailed)}}`);

            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.json'});

            wait().then(() => {
                expect(uploadSuccess.called).to.be.false;
                expect(uploadFailed.calledOnce).to.be.true;
                expect(this.$('.failed').length, 'error message is displayed').to.equal(1);
                expect(this.$('.failed').text()).to.match(/The image type you uploaded is not supported/);
                done();
            });
        });

        it('uploads if validate action supplied and returns true', function (done) {
            let validate = sinon.stub().returns(true);
            let uploadSuccess = sinon.spy();

            this.set('validate', validate);
            this.set('uploadSuccess', uploadSuccess);

            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader
                uploadSuccess=(action uploadSuccess)
                validate=(action validate)}}`);

            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.txt'});

            wait().then(() => {
                expect(validate.calledOnce).to.be.true;
                expect(uploadSuccess.calledOnce).to.be.true;
                done();
            });
        });

        it('skips upload and displays error if validate action supplied and doesn\'t return true', function (done) {
            let validate = sinon.stub().returns(new UnsupportedMediaTypeError());
            let uploadSuccess = sinon.spy();
            let uploadFailed = sinon.spy();

            this.set('validate', validate);
            this.set('uploadSuccess', uploadSuccess);
            this.set('uploadFailed', uploadFailed);

            stubSuccessfulUpload(server);

            this.render(hbs`{{gh-image-uploader
                uploadSuccess=(action uploadSuccess)
                uploadFailed=(action uploadFailed)
                validate=(action validate)}}`);

            fileUpload(this.$('input[type="file"]'), ['test'], {name: 'test.png'});

            wait().then(() => {
                expect(validate.calledOnce).to.be.true;
                expect(uploadSuccess.called).to.be.false;
                expect(uploadFailed.calledOnce).to.be.true;
                expect(this.$('.failed').length, 'error message is displayed').to.equal(1);
                expect(this.$('.failed').text()).to.match(/The image type you uploaded is not supported/);
                done();
            });
        });
    });

    describe('URL input form', function () {
        beforeEach(function () {
            this.set('configService.fileStorage', false);
        });

        it('displays save button by default', function () {
            this.set('image', 'http://example.com/test.png');
            this.render(hbs`{{gh-image-uploader image=image text="text test"}}`);
            expect(this.$('button').length).to.equal(1);
            expect(this.$('input[type="text"]').val()).to.equal('http://example.com/test.png');
        });

        it('can render without a save button', function () {
            this.render(hbs`{{gh-image-uploader image=image saveButton=false text="text test"}}`);
            expect(this.$('button').length).to.equal(0);
            expect(this.$('.description').text().trim()).to.equal('text test');
        });

        it('fires update action when save button clicked', function () {
            let update = sinon.spy();
            this.set('update', update);

            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);

            this.$('input[type="text"]').val('saved url');
            this.$('input[type="text"]').change();
            this.$('button.gh-btn-blue').click();

            expect(update.calledOnce).to.be.true;
            expect(update.firstCall.args[0]).to.equal('saved url');
        });

        it('fires onInput action when typing URL', function () {
            let onInput = sinon.spy();
            this.set('onInput', onInput);

            this.render(hbs`{{gh-image-uploader image=image onInput=(action onInput)}}`);

            this.$('input[type="text"]').val('input url');
            this.$('input[type="text"]').change();

            expect(onInput.calledOnce).to.be.true;
            expect(onInput.firstCall.args[0]).to.equal('input url');
        });

        it('saves on enter key', function () {
            let update = sinon.spy();
            this.set('update', update);

            this.render(hbs`{{gh-image-uploader image=image update=(action update)}}`);

            this.$('input[type="text"]').val('saved url');
            this.$('input[type="text"]').change();
            this.$('input[type="text"]').trigger(
                // eslint-disable-next-line new-cap
                $.Event('keyup', {keyCode: keyCodes.enter, which: keyCodes.enter})
            );

            expect(update.calledOnce).to.be.true;
            expect(update.firstCall.args[0]).to.equal('saved url');
        });
    });
});