const NUMBER_FORMAT_OPTIONS_ALIASES = [
	//
	'temperature',
] as const;

export type NumberFormatAlias = (typeof NUMBER_FORMAT_OPTIONS_ALIASES)[number];


export const createNumberFormatOptionsFor = (
	alias: NumberFormatAlias
): Intl.NumberFormatOptions => {
	if (!NUMBER_FORMAT_OPTIONS_ALIASES.includes(alias)) {
		const these = NUMBER_FORMAT_OPTIONS_ALIASES.join(', ');
		const message = `Unsupported alias "${alias}", we only support ${these}`;
		throw new Error(message);
	}
	let out: Intl.NumberFormatOptions = {};
	const _real: Intl.NumberFormatOptions = {};

	const createRequiredKeyProxyHandler = (keyPath: string) => () =>
		new Error(`Mising argument for "${keyPath}" in NumberFormatOptions`);

	/**
	 * OK, gotta research more than quick experiment
	 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
	 */
	const handler: ProxyHandler<Intl.NumberFormatOptions> = {
		get(target, prop, receiver) {

		},
	};

	switch (true) {
		case alias === 'temperature':
			{
				Object.assign(_real, {
					style: 'unit',
					unit: createRequiredKeyProxyHandler('unit'),
				});
				out = new Proxy(out, handler);
			}
			break;
	}

	return out;
};