task e2410 - 3

class Parking {
    capacity = 0;
    constructor(capacity) {
        this.capacity = Number(capacity);
        this.vehicles = [];
    }

    addCar(carModel, carNumber) {
        carModel = carModel + '';
        carNumber = carNumber + '';
        if (this.vehicles.length >= this.capacity) {
            throw new Error( 'Not enough parking space.');
        }
        let car = {carModel: carModel, carNumber: carNumber, payed: false};
        this.vehicles.push(car);
        this.capacity--;
        return `The ${carModel}, with a registration number ${carNumber}, parked.`;
    }

    removeCar(carNumber) {
        carNumber = carNumber + '';
        let foundCar = this.vehicles.find(c => c.carNumber === carNumber);
        if (!foundCar) {
            throw new Error('The car, you\'re looking for, is not found.')
        }
        if (foundCar.payed === false) {
            throw new Error(`${carNumber} needs to pay before leaving the parking lot.`);
        }
        this.vehicles = this.vehicles.filter(c => c.carNumber !== carNumber);
        this.capacity++;
        return `${carNumber} left the parking lot.`;
    }

    pay(carNumber) {
        carNumber = carNumber + '';
        let foundCar = this.vehicles.find(c => c.carNumber === carNumber);
        if (!foundCar) {
            throw new Error(`${carNumber} is not in the parking lot.`);
        }
        if (foundCar.payed === true) {
            throw new Error (`${carNumber}'s driver has already payed his ticket.`);
        }
        foundCar.payed = true;
        return `${carNumber}'s driver successfully payed for his stay.`;
    }

    getStatistics(carNumber) {
        let print = '';
        if (carNumber === undefined || carNumber === 'undefined' || carNumber === null || carNumber.trim() === '') {
            print += `The Parking Lot has ${this.capacity} empty spots left.\n`;
            let array1V = this.vehicles.sort((x, y) => x.carNumber - y.carNumber);
            for (const v of array1V) {
                if (v.payed === true) {
                    print += `${v.carModel} == ${v.carNumber} - Has payed\n`;
                } else {
                    print += `${v.carModel} == ${v.carNumber} - Not payed\n`;
                }
            }
        } else {
            let foundCar = this.vehicles.find(c => c.carNumber === carNumber);
            if (foundCar.payed === true) {
                print += `${foundCar.carModel} == ${foundCar.carNumber} - Has payed\n`;
            } else {
                print += `${foundCar.carModel} == ${foundCar.carNumber} - Not payed\n`;
            }
        }
        return print.trim();
    }
}

const parking = new Parking(12);
console.log(parking.addCar("Volvo t600", "TX3691CA"));
console.log(parking.getStatistics());
console.log(parking.pay("TX3691CA"));
console.log(parking.removeCar("TX3691CA"));