import jamp3 from "jamp3";
import { readFileSync } from "node:fs";

async function run() {
	const id3v2 = new jamp3.ID3v2();
	const filename = "demo.mp3";

	// Read the existing tag
	const existingTag = await id3v2.read(filename);

	// Initialize the builder from the existing tag to preserve all frames
	const builder = new jamp3.ID3V24TagBuilder();
	if (existingTag) {
		builder.loadTag(existingTag);
	}

	// Single-value frames (title, artist, …) are replaced by their setter.
	// Multi-value frames (picture, comment, …) are appended — use the
	// matching clear…() method first when you want to replace them.
	const coverBuffer = readFileSync("cover.jpg");
	builder
		.title("Updated title")
		.artist("Updated artist")
		.clearPictures() // remove existing artwork
		.picture(3, "", "image/jpeg", coverBuffer); // attach new artwork

	const options = {
		keepBackup: true, // keep a filename.mp3.bak copy of the original file
		paddingSize: 10 // add padding zeros between id3v2 and the audio (in bytes)
	};
	await id3v2.writeBuilder(filename, builder, options);
	console.log("id3v2.4 updated");
}

run().catch(console.error);