class Garden {
    constructor(spaceAvailable) {
        this.spaceAvailable = spaceAvailable;
        this.plants = [];
        this.storage = [];
    }
    addPlant(plantName, spaceRequired) {
        if (this.spaceAvailable - spaceRequired < 0) {

            throw new Error('Not enough space in the garden.');

        } else {

            this.spaceAvailable -= spaceRequired;

            let plant = {
                plantName: plantName,
                spaceRequired: spaceRequired,
                ripe: false,
                quantity: 0
            }
            this.plants.push(plant);
        }
        return this.addPlant;
    }
    ripenPlant(plantName, quantity) {

        if (plant.plantName !== plantName) {
            throw new Error(`There is no ${plantName} in the garden.`);
        }
        if (plant.ripe === true) {
            throw new Error(`The ${plantName} is already ripe.`);
        }
        if (plant.quantity <= 0) {
            throw new Error(`The quantity cannot be zero or negative.`);
        }

        return this.ripenPlant;

    }
}

const myGarden = new Garden(250)
console.log(myGarden.addPlant('apple', 20));
console.log(myGarden.addPlant('orange', 100));
console.log(myGarden.addPlant('cucumber', 30));
console.log(myGarden.ripenPlant('apple', 10));