const data = [
  { name: "Zara", score: 88 },
  { name: "Liam", score: 95 },
  { name: "Maya", score: 88 },
  { name: "Omar", score: 72 },
  { name: "Nina", score: 95 },
];

const sorted = [...data].sort((a, b) =>
  b.score !== a.score
    ? b.score - a.score
    : a.name.localeCompare(b.name)
);

console.log(sorted.map(p => `${p.name}:${p.score}`).join(", "));

class Session {
  #id;
  constructor(id) {
    this.#id = id;
  }
  getId() {
    return this.#id;
  }
}

const activeSessions = new WeakSet();

const s1 = new Session("alpha");
const s2 = new Session("beta");
let s3 = new Session("gamma");

activeSessions.add(s1);
activeSessions.add(s2);
activeSessions.add(s3);

console.log(activeSessions.has(s1));
console.log(activeSessions.has(s3));

activeSessions.delete(s2);
console.log(activeSessions.has(s2));

try {
  activeSessions.add("invalid");
} catch (e) {
  console.log(e instanceof TypeError);
}

console.log(activeSessions.has(s1));

const tag = (strings, ...values) => {
  return strings.reduce((result, str, i) => {
    const val = values[i - 1];
    const transformed =
      typeof val === "number" ? `[${val ** 2}]` : `{${val?.toUpperCase()}}`;
    return result + transformed + str;
  });
};

const name = "nova";
const level = 3;
const score = 97;

const output = tag`Player: ${name} | Level: ${level} | Score: ${score}`;
console.log(output);

const handler = {
  get(target, prop, receiver) {
    if (prop in target) {
      return Reflect.get(target, prop, receiver) * 2;
    }
    return Reflect.get(target, prop, receiver);
  },
  set(target, prop, value, receiver) {
    if (typeof value !== "number") return false;
    return Reflect.set(target, prop, value * 3, receiver);
  },
  has(target, prop) {
    return prop.startsWith("x") && Reflect.has(target, prop);
  },
};

const obj = new Proxy({ x1: 10, y1: 20 }, handler);
obj.x2 = 15;
obj.y2 = 40;

console.log(obj.x1);
console.log(obj.x2);
console.log("x1" in obj);
console.log("y1" in obj);
console.log(obj.y2);

const compose = (...fns) => x => fns.reduceRight((acc, fn) => fn(acc), x);
const pipe = (...fns) => x => fns.reduce((acc, fn) => fn(acc), x);

const double = x => x * 2;
const addTen = x => x + 10;
const square = x => x ** 2;
const negate = x => -x;

const transform1 = compose(negate, square, addTen, double);
const transform2 = pipe(negate, square, addTen, double);

console.log(transform1(3));
console.log(transform2(3));

function* range(start, end) {
  while (start < end) {
    yield start++;
  }
}

function* labeled(prefix, gen) {
  for (const val of gen) {
    yield `${prefix}:${val}`;
  }
}

function* pipeline() {
  yield* labeled("A", range(1, 4));
  yield* labeled("B", range(10, 12));
}

const results = [...pipeline()];
console.log(results.length, results[0], results[results.length - 1]);

function Vehicle(make, model, year) {
  this.make = make;
  this.model = model;
  this.year = year;
  this.describe = function () {
    return `${this.year} ${this.make} ${this.model}`;
  };
}

Vehicle.prototype.age = function (currentYear) {
  return currentYear - this.year;
};

const car = new Vehicle("Toyota", "Supra", 1998);
const truck = new Vehicle("Ford", "Raptor", 2021);

console.log(car.describe());
console.log(truck.age(2025));
console.log(car.constructor === Vehicle);
console.log(Object.getPrototypeOf(car) === Vehicle.prototype);

const balance = 9007199254740991n; // Number.MAX_SAFE_INTEGER as BigInt
const fee = 1n;
const multiplier = 2n;

const total = (balance + fee) * multiplier;
const asNumber = Number(total);

const isSafe = Number.isSafeInteger(asNumber);
const isExact = BigInt(asNumber) === total;

console.log(`${total}n | safe: ${isSafe} | exact: ${isExact}`);

console.log('1: start');

setTimeout(() => console.log('2: setTimeout'), 0);

Promise.resolve()
  .then(() => {
    console.log('3: promise 1');
    return Promise.resolve('chained');
  })
  .then((val) => console.log(`4: ${val}`));

queueMicrotask(() => console.log('5: microtask'));

new Promise((resolve) => {
  console.log('6: executor');
  resolve();
}).then(() => console.log('7: promise 2'));

console.log('8: end');