class Park {
    constructor (name, builtYear, treesNum, area) {
        this.name = name;
        this.builtYear = builtYear;
        this.treesNum = treesNum;
        this.area = area;
    }

    treeDensity() {
        return (this.treesNum / this.area);
    }

    age() {
        const recentlyYear = new Date().getFullYear()
        return (recentlyYear - this.builtYear);
    }

}
class Street {
    constructor(name, builtYear, length) {
    this.name = name;
    this.builtYear = builtYear;
    this.length = length;
    }

    size() {
        var size = this.length;
        switch (true) {
            case size < 11:
                return 'tiny';
            case size > 10 && size < 16:
                return 'small';
            case size > 15 && size < 26:
                return 'normal';
            case size > 25 && size < 61:
                return 'big';
            case size > 60:
                return 'huge';
            default:
                return 'normal';
        }
    }
}


const parks = [
    new Park('Park Fikuśny', 1990, 1200, 5),
    new Park('Park Miłosza', 2005, 750, 2),
    new Park('Park Familijny', 2015, 2100, 10)
];

const streets = [
    new Street('Ułanów', 1988, 30),
    new Street('Podkarpacka', 1980, 92),
    new Street('Zamojska', 1999, 13),
    new Street('Kruświców', 1998, 5)
];

console.log(`--------PARKS REPORT--------`);
// 1. Tree density for each park

parks.forEach(park => {
    console.log(`${park.name} ma zageszczenie ${park.treeDensity()} drzew na kilometr kwadratowy`);
});

// 2. Avg age of each park (all ages/num parks)

var sumAgeParks, avgAgeParks;
sumAgeParks = 0;
for (i=0; i < parks.length; i++) {
    sumAgeParks += parks[i].age();
}
avgAgeParks = sumAgeParks / parks.length

console.log(`Nasze ${parks.length} parki, srednia maja ${avgAgeParks.toFixed(2)} lat.`)

// 3. Park over 1000 trees
var parksOver1000Arr, parksOver1000str;
parksOver1000Arr = [];
for (i=0; i < parks.length; i++) {
    if (parks[i].treesNum > 1000){
        parksOver1000Arr.push(parks[i].name);
    }
}
parksOver1000str = parksOver1000Arr.join(', ');
console.log(`Parki powyzej 1000 drzew to: ${parksOver1000str}.`)

console.log(`--------STREETS REPORT--------`);
// 4. Total and avg street lenght

var sumStreetLength, avgStreetLength;
sumStreetLength = 0;
for (i=0; i < streets.length; i++) {
    sumStreetLength += streets[i].length;
}
avgStreetLength = sumStreetLength / streets.length

console.log(`Nasze ${streets.length} ulice, srednia maja ${avgStreetLength.toFixed(2)}km dlugosci, a srednia dlugosc ulicy wynosi ${sumStreetLength}km`);

// 5. Size classf street: tiny/small/normal/bug/huge if size === unknown = def normal

streets.forEach(street => {
    console.log(`Ulica ${street.name}, zbudowana w ${street.builtYear} roku, jej rozmiar to: ${street.size()}`);
});