import { Pattern, getPlayableNoteValue, noteToMidi } from '@strudel/core';

import { getAudioContext, registerSound } from '@strudel/webaudio';

import { loadSoundfont as _loadSoundfont, startPresetNote } from 'sfumato';

Pattern.prototype.soundfont = function (sf, n = 0) {

  return this.onTrigger((h, ct, cps, targetTime) => {

    const ctx = getAudioContext();

    const note = getPlayableNoteValue(h);

    const preset = sf.presets[n % sf.presets.length];

    const deadline = targetTime;

    const args = [ctx, preset, noteToMidi(note), deadline];

    const stop = startPresetNote(...args);

    stop(deadline + h.duration);

  });

};

const soundfontCache = new Map();

export function loadSoundfont(url) {

  if (soundfontCache.get(url)) {

    return soundfontCache.get(url);

  }

  const sf = _loadSoundfont(url);

  soundfontCache.set(url, sf);

  /*sf.then((font) => {

    font.presets.forEach((preset) => {

      console.log('preset', preset.header.name);

      registerSound(

        preset.header.name.replaceAll(' ', '_'),

        (time, value, onended) => {

          const ctx = getAudioContext();

          let { note } = value; // freq ?

          const p = font.presets.find((p) => p.header.name === preset.header.name);

          if (!p) {

            throw new Error('preset not found');

          }

          const deadline = time; // - ctx.currentTime;

          const args = [ctx, p, noteToMidi(note), deadline];

          const stop = startPresetNote(...args);

          return { node: undefined, stop };

        },

        { type: 'soundfont' },

      );

    });

    //console.log('f', f);

  });*/

  return sf;

}