export class User {
  private name: string;

  constructor(name: string, private email: string) {
    this.name = name;
    this.email = email;
  }

  getInfo() {
    return `${this.name} (${this.email})`;
  }
}

const alice = new User('Alice', 'alice@mail.com');

console.log(alice.getInfo());

export class Admin extends User {
  constructor(name: string, email: string, public role: string) {
    super(name, email);
  }

  override getInfo(): string {
    return super.getInfo() + ', ' + this.role;
  }
}

const bob = new Admin('Bob', 'bob@mail.com', 'admin');
console.log(bob.getInfo());
console.log(bob.role);

class MyClass {
  public publicProperty: string = 'Public';
  private privateProperty: string = 'Private';
  protected protectedProperty: string = 'Proctected';

  getPrivatePropertyValue(): string {
    return this.privateProperty;
  }
}

class MySubClass extends MyClass {
  public getProtectedPropertyValue(): string {
    return this.protectedProperty;
  }
}

const myclass = new MyClass();
console.log(myclass.publicProperty);
console.log(myclass.getPrivatePropertyValue());

const mysubclass = new MySubClass();
console.log(mysubclass.getProtectedPropertyValue());

export class MathUtil {
  static PI: number = 3.14159;
  test = 'demo';

  static circleArea(radius: number): number {
    return this.PI * radius * radius;
  }
}

const mathUtil = new MathUtil();
mathUtil.test;

export class Person {
  private _age: number;
  constructor(age: number) {
    this._age = age;
  }

  get age(): number {
    return this._age;
  }

  set age(value: number) {
    if (value < 0) {
      throw new Error('Alter kann nicht negativ sein!');
    }

    this._age = value;
  }
}

const person = new Person(42);

console.log(person.age);
person.age = 43;
console.log(person.age);

export abstract class Animal {
  constructor(public name: string) {}

  abstract makeSound(): void;
}

class Dog extends Animal {
  override makeSound(): void {
    console.log('Wuff wuff');
  }
}

const dog = new Dog('Bello');
dog.makeSound();