import { ITerminalIO, ITerminalSize } from '../common/types.ts';

/**
 * Wrap the runtime-specific hook into stdin
 */
export async function* inputLoop() {
	for await (const chunk of Deno.stdin.readable) {
		yield chunk;
	}
}

export async function write(s: string): Promise<void> {
	const buffer = new TextEncoder().encode(s);

	const stdout = Deno.stdout.writable.getWriter();
	await stdout.write(buffer);
	stdout.releaseLock();
}

export function getSize(): ITerminalSize {
	const size: { rows: number; columns: number } = Deno.consoleSize();

	return {
		rows: size.rows,
		cols: size.columns,
	};
}

const DenoTerminalIO: ITerminalIO = {
	inputLoop,
	getSize,
	write,
};

export default DenoTerminalIO;