/**
 * Klangdateien (Kenney, CC0) und Abspieloptionen je Effekt.
 *
 * Mehrere Dateien pro Effekt werden zufällig abgewechselt, damit Dauerfeuer nicht
 * monoton klingt. Fehlt eine Datei oder kann der Browser OGG nicht dekodieren,
 * springt der Synthesizer in `Synth.js` ein.
 * @module systems/AudioAssets
 */

/** Pfad relativ zu `static/assets/`. */
export const AUDIO_PATH = 'kenney/audio/';

/** @type {Readonly<Record<string, readonly string[]>>} */
export const SOUND_FILES = Object.freeze({
  'shot-carbine': ['laserSmall_000.ogg', 'laserSmall_001.ogg', 'laserSmall_002.ogg'],
  'shot-shotgun': ['laserLarge_000.ogg', 'laserLarge_001.ogg'],
  'shot-pistol': ['laserRetro_000.ogg', 'laserRetro_001.ogg'],
  'turret-shot': ['laserRetro_002.ogg'],
  'enemy-shot': ['laserSmall_003.ogg', 'laserSmall_004.ogg'],
  'hit-flesh': ['impactSoft_medium_000.ogg', 'impactSoft_medium_001.ogg', 'impactSoft_medium_002.ogg'],
  'hit-metal': ['impactMetal_light_000.ogg', 'impactMetal_light_001.ogg', 'impactMetal_light_002.ogg'],
  'death-swarm': ['slime_000.ogg', 'slime_001.ogg'],
  'death-legion': ['explosionCrunch_000.ogg', 'explosionCrunch_001.ogg'],
  'explosion-small': ['explosionCrunch_002.ogg', 'explosionCrunch_003.ogg'],
  'explosion-big': ['lowFrequency_explosion_000.ogg'],
  'player-hit': ['impactPunch_heavy_000.ogg', 'impactPunch_heavy_001.ogg'],
  'player-death': ['lowFrequency_explosion_001.ogg'],
  reload: ['impactPlate_light_000.ogg'],
  'reload-done': ['click_001.ogg'],
  switch: ['select_001.ogg'],
  'combo-step': ['tick_001.ogg'],
  'combo-fail': ['error_001.ogg'],
  'orbital-call': ['confirmation_001.ogg'],
  pickup: ['maximize_001.ogg'],
  brood: ['slime_001.ogg'],
  'ui-click': ['click_001.ogg'],
  'ui-confirm': ['confirmation_002.ogg'],
  'wave-start': ['jingles_HIT15.ogg'],
  'wave-cleared': ['jingles_STEEL07.ogg'],
  alarm: ['jingles_HIT11.ogg'],
  'game-over': ['jingles_PIZZI07.ogg'],
  // Nur synthetisch (kein passendes kurzes Sample): Ausweichrolle, Mörserpfeifen.
  dodge: [],
  mortar: [],
});

/**
 * Lautstärke (0..1), Tonhöhe (1 = original) und Tonhöhenstreuung je Effekt.
 * Jingles laufen über den Musikkanal, damit „Musik leiser“ auch sie betrifft.
 * @type {Readonly<Record<string, {volume?: number, rate?: number, spread?: number, channel?: 'sfx'|'music'}>>}
 */
export const SOUND_OPTIONS = Object.freeze({
  'shot-carbine': { volume: 0.35, spread: 0.08 },
  'shot-shotgun': { volume: 0.5, rate: 0.8, spread: 0.06 },
  'shot-pistol': { volume: 0.4, spread: 0.06 },
  'turret-shot': { volume: 0.22, rate: 1.4, spread: 0.1 },
  'enemy-shot': { volume: 0.22, rate: 0.7, spread: 0.1 },
  'hit-flesh': { volume: 0.35, spread: 0.15 },
  'hit-metal': { volume: 0.3, spread: 0.15 },
  'death-swarm': { volume: 0.5, spread: 0.15 },
  'death-legion': { volume: 0.4, rate: 1.2, spread: 0.1 },
  'explosion-small': { volume: 0.6, spread: 0.1 },
  'explosion-big': { volume: 1 },
  'player-hit': { volume: 0.6, spread: 0.1 },
  'player-death': { volume: 1, rate: 0.8 },
  reload: { volume: 0.45 },
  'reload-done': { volume: 0.4 },
  switch: { volume: 0.4 },
  'combo-step': { volume: 0.5 },
  'combo-fail': { volume: 0.5 },
  'orbital-call': { volume: 0.6 },
  pickup: { volume: 0.6 },
  brood: { volume: 0.5, rate: 0.7 },
  'ui-click': { volume: 0.4 },
  'ui-confirm': { volume: 0.5 },
  'wave-start': { volume: 0.8, channel: 'music' },
  'wave-cleared': { volume: 0.8, channel: 'music' },
  alarm: { volume: 0.8, channel: 'music' },
  'game-over': { volume: 0.9, channel: 'music' },
  dodge: { volume: 0.35 },
  mortar: { volume: 0.3 },
});

/** @returns {string[]} Alle benötigten Dateien ohne Duplikate. */
export function allSoundFiles() {
  return [...new Set(Object.values(SOUND_FILES).flat())];
}