import type { Instrument } from './types.ts';
import { builtinInstruments } from './builtins.ts';

// The instrument registry. Custom instruments (a GPU physical model, a
// sampler, anything implementing Instrument) are added with
// registerInstrument, typically at startup; tracks refer to instruments by
// id, so an unknown id falls back to the first builtin rather than
// failing.

const instruments = new Map<string, Instrument>();
for (const ins of builtinInstruments) instruments.set(ins.id, ins);

export function registerInstrument(ins: Instrument): void {
  instruments.set(ins.id, ins);
}

export function unregisterInstrument(id: string): void {
  instruments.delete(id);
}

export function getInstrument(id: string): Instrument {
  return instruments.get(id) ?? builtinInstruments[0];
}

export function listInstruments(): Instrument[] {
  return [...instruments.values()];
}