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

const cinema = {
    showMovies: function (movieArr) {

        if (movieArr.length == 0) {
            return 'There are currently no movies to show.';
        } else {
            let result = movieArr.join(', ');
            return result;
        }

    },
    ticketPrice: function (projectionType) {

        const schedule = {
            "Premiere": 12.00,
            "Normal": 7.50,
            "Discount": 5.50
        }
        if (schedule.hasOwnProperty(projectionType)) {
            let price = schedule[projectionType];
            return price;
        } else {
            throw new Error('Invalid projection type.')
        }

    },
    swapSeatsInHall: function (firstPlace, secondPlace) {
        if (!Number.isInteger(firstPlace) || firstPlace <= 0 || firstPlace > 20 || !Number.isInteger(secondPlace) || secondPlace <= 0 || secondPlace > 20 || firstPlace === secondPlace) {
            return "Unsuccessful change of seats in the hall.";
        } else {
            return "Successful change of seats in the hall.";
        }

    }
};

describe('Cinema', () => {
    describe('Show movies', () => {
        it('Should fail if the given input array is empty', () => {
            expect(cinema.showMovies([])).to.be.equal('There are currently no movies to show.');
        });

        it('Should return joined array if the array is correct', () => {
            expect(cinema.showMovies(['BBB','CCC'])).to.be.equal('BBB, CCC');
        });
    });

    describe('ticketPrice', () => {
        it('Should pass if the projection type is available', () => {
            expect(cinema.ticketPrice('Premiere')).to.be.equal(12.00);
            expect(cinema.ticketPrice('Normal')).to.be.equal(7.50);
            expect(cinema.ticketPrice('Discount')).to.be.equal(5.50);


        });
        it('Should throw if the projection type is not correct', () => {
            expect(() => cinema.ticketPrice('Casual')).to.throw(Error, 'Invalid projection type.');
        });
    });

    describe('swapSeatsInHall', () => {
        it('Should fail if the input numbers are not integers', () => {
            expect(cinema.swapSeatsInHall(2.2, 3)).to.be.equal('Unsuccessful change of seats in the hall.');
            expect(cinema.swapSeatsInHall(2.2, 3.2)).to.be.equal('Unsuccessful change of seats in the hall.');
        });
        it('Should fail if one of the input numbers is greater than 20', () => {
            expect(cinema.swapSeatsInHall(25, 2)).to.be.equal('Unsuccessful change of seats in the hall.');
            expect(cinema.swapSeatsInHall(2, 30)).to.be.equal('Unsuccessful change of seats in the hall.');
        });
        it('Should fail if one of the input numbers is less or equal to 0', () => {
            expect(cinema.swapSeatsInHall(0, 2)).to.be.equal('Unsuccessful change of seats in the hall.');
            expect(cinema.swapSeatsInHall(2, -2)).to.be.equal('Unsuccessful change of seats in the hall.');
        });
        it('Should fail if one of the input numbers do not exist', () => {
            expect(cinema.swapSeatsInHall(2)).to.be.equal('Unsuccessful change of seats in the hall.');
        });
        it('Should fail if the input numbers are equal', () => {
            expect(cinema.swapSeatsInHall(2, 2)).to.be.equal('Unsuccessful change of seats in the hall.');
        });
        it('Should pass if the input numbers are correct', () => {
            expect(cinema.swapSeatsInHall(2, 3)).to.be.equal('Successful change of seats in the hall.');
        });
    });
});