let hoverAudio = null
let clickAudio = null
let unlocked = false
let unlockListenerAdded = false

function getHoverAudio() {
  if (!hoverAudio) {
    hoverAudio = uni.createInnerAudioContext()
    hoverAudio.src = '/static/sounds/hover.mp3'
  }
  return hoverAudio
}

function getClickAudio() {
  if (!clickAudio) {
    clickAudio = uni.createInnerAudioContext()
    clickAudio.src = '/static/sounds/click.mp3'
  }
  return clickAudio
}

/** 安全播放，吞掉 autoplay 策略导致的 Promise  rejection */
function safePlay(audio) {
  try {
    audio.stop()
    const ret = audio.play()
    if (ret && typeof ret.then === 'function') {
      ret.catch(() => {})
    }
  } catch (e) {}
}

/** 首次用户点击/触摸后解锁音频（hover 不算用户手势） */
function primeAudio() {
  ;[getHoverAudio(), getClickAudio()].forEach(audio => {
    try {
      audio.volume = 0
      const ret = audio.play()
      const finish = () => {
        audio.stop()
        audio.volume = 1
      }
      if (ret && typeof ret.then === 'function') {
        ret.then(finish).catch(() => { audio.volume = 1 })
      } else {
        setTimeout(finish, 30)
      }
    } catch (e) {
      audio.volume = 1
    }
  })
}

export function setupSoundUnlock() {
  if (unlockListenerAdded || typeof document === 'undefined') return
  unlockListenerAdded = true
  const onUnlock = () => {
    if (unlocked) return
    unlocked = true
    primeAudio()
    document.removeEventListener('click', onUnlock, true)
    document.removeEventListener('touchstart', onUnlock, true)
    document.removeEventListener('keydown', onUnlock, true)
  }
  document.addEventListener('click', onUnlock, true)
  document.addEventListener('touchstart', onUnlock, true)
  document.addEventListener('keydown', onUnlock, true)
}

function ensureUnlocked() {
  if (!unlocked) {
    unlocked = true
    primeAudio()
  }
}

export function playHoverSound() {
  if (!unlocked) return
  safePlay(getHoverAudio())
}

export function playClickSound() {
  ensureUnlocked()
  safePlay(getClickAudio())
}

setupSoundUnlock()