import { OrderService } from './order.service'

describe('Order maintainence', () => {
    let service: OrderService;
    beforeEach(() => { service = new OrderService(null, null); });

    it('Should add a product to the general list', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.addProduct(product)
        .subscribe(() => {
            expect(service.orderItems).toContain(product)
        })
    }),

    it('Should add a product to the ID list', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.addProduct(product)
        .subscribe(() => {
            expect(service.ids).toContain(product._id)
        })
    }),

    it('Should return true when adding a product to the list', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.addProduct(product)
        .subscribe((result) => {
            expect(result).toBe(true)
        })
    }),

    it('Should return false when adding a product which is already in the list', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.orderItems.push(product);
        service.ids.push(product._id)

        service.addProduct(product)
        .subscribe((result) => {
            expect(result).toBe(false)
        })
    })

    it('Should not add a product when adding a product which is already in the list', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.orderItems.push(product);
        service.ids.push(product._id)

        service.addProduct(product)
        .subscribe(() => {
            expect(service.orderItems.length).toBe(1)
            expect(service.ids.length).toBe(1)
        })
    }),

    it('Should clear the order when clearOrder() is called', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.orderItems.push(product);
        service.ids.push(product._id)
        service.clearOrder()

        expect(service.orderItems).toBeNull
        expect(service.ids).toBeNull
    }),

    it('Should return the order when getOrder() is called', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.orderItems.push(product);
        service.ids.push(product._id)
        service.getOrder()
        .subscribe((result) => {
            expect(result.length).toBe(1)
        })
    }),

    it('Should remove an item removeAt(pos) is called', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        const product2: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.orderItems.push(product);
        service.orderItems.push(product2);
        service.ids.push(product._id);
        service.ids.push(product2._id);
        service.removeAt(1)

        expect(service.orderItems.length).toBe(1)
        expect(service.ids.length).toBe(1)
    }),

    it('Should do nothing when removeAt(pos) is called with a pos that is out of bounds', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.orderItems.push(product);
        service.ids.push(product._id);
        service.removeAt(1)

        expect(service.orderItems.length).toBe(1)
        expect(service.ids.length).toBe(1)
    }),

    it('Should do nothing when removeAt(pos) is called with a negative pos', () => {
        const product: IProduct = {
            name: 'name',
            image: '/imageurl/image.jpg',
            price: 100,
            thumbnail: '/imageurl/thumbnail_image.jpg',
            _id: '_id'
        }

        service.orderItems.push(product);
        service.ids.push(product._id);
        service.removeAt(-1)

        expect(service.orderItems.length).toBe(1)
        expect(service.ids.length).toBe(1)
    })
})