import expect from 'unexpected';
import sinon from 'sinon';

import AuthFlow from 'services/authFlow/AuthFlow';

import RegisterState from 'services/authFlow/RegisterState';
import ActivationState from 'services/authFlow/ActivationState';
import ResendActivationState from 'services/authFlow/ResendActivationState';

describe('AuthFlow.functional', () => {
    let flow;
    let actions;
    let store;
    let state;
    let navigate;

    beforeEach(() => {
        actions = {};
        store = {
            getState: sinon.stub().named('store.getState'),
            dispatch: sinon.spy(({type, payload = {}}) => {
                if (type === '@@router/TRANSITION' && payload.method === 'push') {
                    // emulate redux-router
                    navigate(...payload.args);
                }
            }).named('store.dispatch')
        };

        state = {};

        flow = new AuthFlow(actions);
        flow.setStore(store);

        navigate = function navigate(path, extra = {}) { // emulates router behaviour
            if (navigate.lastUrl !== path) {
                navigate.lastUrl = path;
                flow.handleRequest({path, query: new URLSearchParams(), params: {}, ...extra}, navigate);
            }
        };

        sinon.stub(flow, 'run').named('flow.run');
        sinon.spy(flow, 'navigate').named('flow.navigate');
        store.getState.returns(state);
    });

    describe('guest', () => {
        beforeEach(() => {
            state.user = {
                isGuest: true
            };
            state.auth = {
                login: null
            };
        });

        it('should redirect guest / -> /login', () => {
            navigate('/');

            expect(flow.navigate, 'was called once');
            expect(flow.navigate, 'to have a call satisfying', ['/login']);
        });

        it('should redirect guest to /login after /login -> /', () => {
            // this is to ensure, that when AuthFlow is already on LoginState (on /login)
            // it will not allow user to go to / (which is forbidden for users) and will
            // always redirect to /login, so that enter condition of state is always satisfied

            navigate('/login');
            navigate('/');

            expect(flow.navigate, 'was called twice');
            expect(flow.navigate, 'to have a call satisfying', ['/login']);
        });
    });

    describe('oauth', () => {
        it('should oauth without any rendering if no acceptance required', () => {
            const expectedRedirect = 'foo';

            Object.assign(state, {
                user: {
                    isGuest: false,
                    isActive: true
                },

                auth: {
                    oauth: {
                        clientId: 123,
                        prompt: []
                    }
                }
            });

            flow.run.onCall(0).returns({then: (fn) => fn()});
            flow.run.onCall(1).returns({then: (fn) => fn({
                redirectUri: expectedRedirect
            })});

            navigate('/oauth2');

            expect(flow.run, 'to have calls satisfying', [
                ['oAuthValidate', {}],
                ['oAuthComplete', {}],
                ['redirect', expectedRedirect]
            ]);
        });
    });

    describe('/resend-activation #goBack()', () => {
        beforeEach(() => {
            state.user = {
                isGuest: true,
                isActive: false
            };
        });

        it('should goBack to /activation', () => {
            navigate('/activation');
            expect(flow.state, 'to be a', ActivationState);

            flow.state.reject(flow);
            expect(flow.state, 'to be a', ResendActivationState);

            flow.state.goBack(flow);
            expect(flow.state, 'to be a', ActivationState);
        });

        it('should goBack to /register', () => {
            navigate('/register');
            expect(flow.state, 'to be a', RegisterState);

            flow.state.reject(flow, {requestEmail: true});
            expect(flow.state, 'to be a', ResendActivationState);

            flow.state.goBack(flow);
            expect(flow.state, 'to be a', RegisterState);
        });
    });
});