/* eslint-disable no-unused-expressions */

const { expect } = require('chai');

const mongoMocker = require('mongo-mocker');

const {
    insertUser,
    modifyUser,
    deleteUser,
    getUsers,
    COLLECTION_USERS
} = require('server/modules/users');

describe('API - Users module', () => {
    let db = null;

    const testUsers = [
        { name: 'John Doe', email: 'john.doe@mubaloo.com' },
        { name: 'Jill Doe', email: 'jill.doe@mubaloo.com' }
    ];

    before(() => {
        db = mongoMocker('mongoDriver/path', {
            [COLLECTION_USERS]: testUsers
        });
    });

    beforeEach(async () => {
        const users = await db.collection(COLLECTION_USERS);

        await Promise.all(testUsers.map(user => users.insert(user)));
    });

    afterEach(() => {
        db.mock.clearAll();
    });

    describe('insertUser', () => {
        it('should insert an employee into the users collection', async () => {
            const users = await db.collection(COLLECTION_USERS);

            const testUser = {
                name: 'Jack Doe',
                email: 'jack.doe@mubaloo.com'
            };

            const rowsBefore = await users.find(testUser)
                .toArray();

            expect(rowsBefore).to.be.an('array').of.length(0);

            const newUserResult = await insertUser(db, testUser);

            const rowsAfter = await users.find(testUser)
                .toArray();

            expect(rowsAfter).to.be.an('array').of.length(1);

            expect(rowsAfter[0]).to.have.property('name', 'Jack Doe');
            expect(rowsAfter[0]).to.have.property('email', 'jack.doe@mubaloo.com');
            expect(rowsAfter[0]).to.have.property('_id');
            expect(rowsAfter[0]._id).to.be.an('object');

            expect(newUserResult).to.be.an('object');

            expect(newUserResult).to.have.property('name', 'Jack Doe');
            expect(newUserResult).to.have.property('email', 'jack.doe@mubaloo.com');
        });

        const badUsers = [
            {},
            { name: 'Some name' },
            { email: 'some.email@mubaloo.com' },
            { name: 'Some name', email: 'notanemail' }
        ];

        badUsers.forEach((user, index) => {
            it(`should throw an error if information is missing or invalid (${index + 1}/${badUsers.length})`, async () => {

                let errorThrown = false;

                try {
                    await insertUser(db, user);
                } catch (err) {
                    errorThrown = true;
                }

                if (!errorThrown) {
                    throw new Error('Did not throw an error');
                }
            });
        });
    });

    describe('modifyUser', () => {
        it('should modify a specific user', async () => {
            const users = await db.collection(COLLECTION_USERS);

            const user = await users.findOne({ name: 'John Doe' });

            const id = String(user._id);

            await modifyUser(db, id, {
                name: 'Jack Doe'
            });

            const modifiedUser = await users.findOne({ _id: user._id });

            expect(modifiedUser).to.have.property('name', 'Jack Doe');
            expect(modifiedUser).to.have.property('email', 'john.doe@mubaloo.com');
        });

        const badUsers = [
            { email: 'notanemail' }
        ];

        badUsers.forEach((user, index) => {
            it(`should throw an error if information is invalid (${index + 1}/${badUsers.length})`, async () => {

                const users = await db.collection(COLLECTION_USERS);

                const userResult = await users.findOne({ name: 'John Doe' });

                const id = String(userResult._id);

                let errorThrown = false;

                try {
                    await modifyUser(db, id, user);
                } catch (err) {
                    errorThrown = true;
                }

                if (!errorThrown) {
                    throw new Error('Did not throw an error');
                }
            });
        });
    });

    describe('deleteUser', () => {
        it('should delete a user', async () => {
            const users = await db.collection(COLLECTION_USERS);

            const existingUser = await users.findOne({ name: 'John Doe' });

            expect(existingUser).to.be.an('object');

            const id = String(existingUser._id);

            await deleteUser(db, id);

            const newQueryResult = await users.findOne({ name: 'John Doe' });

            expect(newQueryResult).to.be.undefined;
        });
    });

    describe('getUsers', () => {
        it('should get a complete list of users (employees) from the database', async () => {
            const result = await getUsers(db);

            expect(result).to.be.an('array').of.length(2);

            expect(result[0]).to.deep.include({
                name: 'John Doe',
                email: 'john.doe@mubaloo.com'
            });

            expect(result[1]).to.deep.include({
                name: 'Jill Doe',
                email: 'jill.doe@mubaloo.com'
            });

            expect(result[0]).to.have.property('id');
            expect(result[1]).to.have.property('id');

            expect(result[0].id).to.be.a('string');
            expect(result[1].id).to.be.a('string');
        });
    });
});