// SPDX-License-Identifier: GPL-3.0-or-later
export const EQ_FREQUENCIES = [25,40,63,100,160,250,400,630,1000,1600,2500,4000,6300,10000,16000];
export const COMP_FREQUENCIES = [95,200,400,800,1600,3400,7500];
export const EFFECTS = ['eq','compressor','bass','stereo','reverb','crossfeed','tube','convolver','liveprog','ddc','arbitrary'];
export const PARAMS = {
  bypass:[0,1,0], gain:[-24,12,0],
  'limiter.threshold':[-24,0,-0.1], 'limiter.release':[10,1000,100],
  'eq.mode':[0,5,1], 'eq.interpolation':[0,1,0],
  'compressor.time':[0.01,2,0.1], 'compressor.mode':[0,3,3], 'compressor.granularity':[0,4,0],
  'bass.boost':[0,12,6], 'stereo.mix':[0,1,0.5], 'reverb.preset':[0,18,0],
  'crossfeed.mode':[0,5,0], 'tube.drive':[-12,12,0],
};
for (const effect of EFFECTS) PARAMS[`${effect}.enabled`] = [0,1,0];
EQ_FREQUENCIES.forEach((_, i) => PARAMS[`eq.band${i}`] = [-12,12,0]);
COMP_FREQUENCIES.forEach((_, i) => PARAMS[`compressor.band${i}`] = [-12,12,0]);
export const DEFAULT_PARAMS = Object.fromEntries(Object.entries(PARAMS).map(([k,v])=>[k,v[2]]));
export function validateParam(name, value) {
  const spec=PARAMS[name];
  if (!spec || typeof value!=='number' || !Number.isFinite(value) || value<spec[0] || value>spec[1]) throw new RangeError(`Invalid parameter ${name}: ${value}`);
  if ((name.endsWith('.enabled') || /mode|preset|granularity|interpolation|bypass/.test(name)) && !Number.isInteger(value)) throw new RangeError(`${name} requires an integer`);
}
export const PRESETS = {
  Flat: {},
  'Warm lows': {'eq.band0':4,'eq.band1':4,'eq.band2':3,'eq.band3':2,'eq.enabled':1,'gain':-3},
  'Headphones': {'crossfeed.enabled':1,'crossfeed.mode':1,'eq.band8':-2,'eq.enabled':1},
  'Small room': {'reverb.preset':7,'reverb.enabled':1,'gain':-3},
};