import { Howl, Howler } from 'howler'

let unlocked = false

export function isAudioUnlocked(): boolean {
  return unlocked
}

/**
 * Call within a real user interaction (click / keydown).
 * Unlocks the Howler global AudioContext so all subsequent
 * playback works without further interaction.
 */
export async function unlockAudio(): Promise<void> {
  if (unlocked) return

  // 1. Resume Howler's global AudioContext
  const ctx = Howler.ctx
  if (ctx && ctx.state === 'suspended') {
    await ctx.resume()
  }

  // 2. Play a silent WAV to force-activate (iOS Safari compat)
  const silentHowl = new Howl({
    src: ['data:audio/wav;base64,UklGRiQAAABXQVZFZm10IBAAAAABAAEAQB8AAIA+AAACABAAZGF0YQAAAAA='],
    volume: 0,
    html5: true,
  })
  silentHowl.play()
  silentHowl.once('end', () => silentHowl.unload())

  unlocked = true
}