// sample-main.mts: a TypeScript ES module that imports another one.
// Free sample from 99helpers.com/file-types/ts
// Run:    node sample-main.mts          (Node.js 22.18+ or 23.6+)
// Check:  npx tsc --noEmit --allowImportingTsExtensions sample-main.mts

// A type-only import. Node.js needs the `type` keyword: types are erased,
// so without it Node.js would look for a value called Shape and fail.
import type { Shape } from "./sample-shapes.mts";

// A value import. The file extension is written out, as Node.js requires.
import { area, UNIT } from "./sample-shapes.mts";

const shapes: Shape[] = [
  { kind: "circle", centre: { x: 0, y: 0 }, radius: 1 },
  { kind: "rectangle", corner: { x: 2, y: 2 }, width: 3, height: 4 },
];

// Top-level await: allowed because this file is a module.
const total: number = await Promise.resolve(
  shapes.reduce((sum, shape) => sum + area(shape), 0),
);

for (const shape of shapes) {
  console.log(`${shape.kind}: ${area(shape).toFixed(2)} ${UNIT}²`);
}
console.log(`total: ${total.toFixed(2)} ${UNIT}²`);
console.log(`loaded from: ${import.meta.url}`);