/**
 * 音效系统
 * Phase 3 UI美化 - 音效支持
 *
 * 注意：uni-app的音频功能有限，不同平台支持情况不同
 * H5端：使用Web Audio API
 * 小程序端：使用 wx.createInnerAudioContext()
 * App端：使用 plus.audio
 */

/**
 * 音效类型枚举
 */
export const SOUND_TYPES = {
  // UI音效
  CLICK: 'click',
  OPEN: 'open',
  CLOSE: 'close',
  TOGGLE: 'toggle',

  // 游戏音效
  COMBAT_START: 'combat_start',
  COMBAT_HIT: 'combat_hit',
  COMBAT_HIT_PLAYER: 'combat_hit_player',
  COMBAT_VICTORY: 'combat_victory',
  COMBAT_DEFEAT: 'combat_defeat',

  // 奖励音效
  REWARD: 'reward',
  LEVEL_UP: 'level_up',
  SKILL_UP: 'skill_up',

  // 错误音效
  ERROR: 'error',
  WARNING: 'warning',

  // 系统音效
  NOTIFICATION: 'notification',
  MESSAGE: 'message'
}

/**
 * 音效配置
 */
const SOUND_CONFIG = {
  // 是否启用音效
  enabled: true,
  // 音量 (0-1)
  volume: 0.5,
  // 音效文件路径配置 (需要实际文件)
  soundPaths: {
    [SOUND_TYPES.CLICK]: '/static/sounds/click.mp3',
    [SOUND_TYPES.OPEN]: '/static/sounds/open.mp3',
    [SOUND_TYPES.CLOSE]: '/static/sounds/close.mp3',
    [SOUND_TYPES.TOGGLE]: '/static/sounds/toggle.mp3',
    [SOUND_TYPES.COMBAT_START]: '/static/sounds/combat_start.mp3',
    [SOUND_TYPES.COMBAT_HIT]: '/static/sounds/combat_hit.mp3',
    [SOUND_TYPES.COMBAT_HIT_PLAYER]: '/static/sounds/combat_hit_player.mp3',
    [SOUND_TYPES.COMBAT_VICTORY]: '/static/sounds/combat_victory.mp3',
    [SOUND_TYPES.COMBAT_DEFEAT]: '/static/sounds/combat_defeat.mp3',
    [SOUND_TYPES.REWARD]: '/static/sounds/reward.mp3',
    [SOUND_TYPES.LEVEL_UP]: '/static/sounds/level_up.mp3',
    [SOUND_TYPES.SKILL_UP]: '/static/sounds/skill_up.mp3',
    [SOUND_TYPES.ERROR]: '/static/sounds/error.mp3',
    [SOUND_TYPES.WARNING]: '/static/sounds/warning.mp3',
    [SOUND_TYPES.NOTIFICATION]: '/static/sounds/notification.mp3',
    [SOUND_TYPES.MESSAGE]: '/static/sounds/message.mp3'
  }
}

/**
 * 音频上下文缓存
 */
let audioContext = null
let audioCache = {}

/**
 * 初始化音频系统
 */
export function initSoundSystem() {
  // #ifdef H5
  try {
    audioContext = new (window.AudioContext || window.webkitAudioContext)()
  } catch (e) {
    console.warn('Web Audio API not supported:', e)
  }
  // #endif

  // #ifdef MP-WEIXIN
  // 小程序端使用微信音频API
  // #endif

  // 从本地存储加载音效设置
  loadSoundSettings()
}

/**
 * 播放音效
 * @param {String} soundType - 音效类型
 * @param {Object} options - 选项 { volume, speed }
 */
export function playSound(soundType, options = {}) {
  if (!SOUND_CONFIG.enabled) {
    return { success: false, message: '音效已禁用' }
  }

  const volume = options.volume !== undefined ? options.volume : SOUND_CONFIG.volume

  // #ifdef H5
  return playSoundH5(soundType, volume)
  // #endif

  // #ifdef MP-WEIXIN
  return playSoundWeixin(soundType, volume)
  // #endif

  // #ifdef APP-PLUS
  return playSoundApp(soundType, volume)
  // #endif

  return { success: false, message: '当前平台不支持音效' }
}

/**
 * H5端播放音效 (使用Web Audio API合成简单音效)
 */
function playSoundH5(soundType, volume) {
  if (!audioContext) {
    initSoundSystem()
    if (!audioContext) {
      return { success: false, message: '音频上下文初始化失败' }
    }
  }

  // 恢复音频上下文（某些浏览器需要用户交互后才能恢复）
  if (audioContext.state === 'suspended') {
    audioContext.resume()
  }

  try {
    // 创建振荡器生成简单音效
    const oscillator = audioContext.createOscillator()
    const gainNode = audioContext.createGain()

    oscillator.connect(gainNode)
    gainNode.connect(audioContext.destination)

    // 根据音效类型设置不同的频率和包络
    const soundParams = getSoundParameters(soundType)
    oscillator.type = soundParams.type || 'sine'
    oscillator.frequency.setValueAtTime(soundParams.frequency, audioContext.currentTime)

    // 设置音量包络
    const now = audioContext.currentTime
    gainNode.gain.setValueAtTime(0, now)
    gainNode.gain.linearRampToValueAtTime(volume * 0.3, now + 0.01)
    gainNode.gain.exponentialRampToValueAtTime(0.001, now + soundParams.duration)

    oscillator.start(now)
    oscillator.stop(now + soundParams.duration)

    return { success: true }
  } catch (e) {
    console.warn('播放音效失败:', e)
    return { success: false, message: e.message }
  }
}

/**
 * 获取音效参数 (用于合成音效)
 */
function getSoundParameters(soundType) {
  const params = {
    // 点击音效 - 短促的高音
    [SOUND_TYPES.CLICK]: { type: 'sine', frequency: 800, duration: 0.05 },
    // 打开音效 - 上升音调
    [SOUND_TYPES.OPEN]: { type: 'sine', frequency: 400, duration: 0.15 },
    // 关闭音效 - 下降音调
    [SOUND_TYPES.CLOSE]: { type: 'sine', frequency: 300, duration: 0.1 },
    // 切换音效
    [SOUND_TYPES.TOGGLE]: { type: 'square', frequency: 500, duration: 0.08 },
    // 战斗开始 - 低沉
    [SOUND_TYPES.COMBAT_START]: { type: 'sawtooth', frequency: 150, duration: 0.3 },
    // 命中敌人 - 尖锐
    [SOUND_TYPES.COMBAT_HIT]: { type: 'square', frequency: 1200, duration: 0.08 },
    // 被命中 - 低频
    [SOUND_TYPES.COMBAT_HIT_PLAYER]: { type: 'sawtooth', frequency: 200, duration: 0.15 },
    // 胜利 - 上升音阶
    [SOUND_TYPES.COMBAT_VICTORY]: { type: 'sine', frequency: 523, duration: 0.4 },
    // 失败 - 下降音
    [SOUND_TYPES.COMBAT_DEFEAT]: { type: 'sawtooth', frequency: 100, duration: 0.4 },
    // 奖励 - 悦耳的高音
    [SOUND_TYPES.REWARD]: { type: 'sine', frequency: 880, duration: 0.2 },
    // 升级 - 双音
    [SOUND_TYPES.LEVEL_UP]: { type: 'sine', frequency: 659, duration: 0.3 },
    // 技能升级
    [SOUND_TYPES.SKILL_UP]: { type: 'sine', frequency: 784, duration: 0.25 },
    // 错误 - 低频嗡鸣
    [SOUND_TYPES.ERROR]: { type: 'sawtooth', frequency: 100, duration: 0.2 },
    // 警告
    [SOUND_TYPES.WARNING]: { type: 'square', frequency: 440, duration: 0.15 },
    // 通知
    [SOUND_TYPES.NOTIFICATION]: { type: 'sine', frequency: 660, duration: 0.2 },
    // 消息
    [SOUND_TYPES.MESSAGE]: { type: 'sine', frequency: 587, duration: 0.15 }
  }

  return params[soundType] || { type: 'sine', frequency: 440, duration: 0.1 }
}

/**
 * 微信小程序端播放音效
 */
function playSoundWeixin(soundType, volume) {
  // #ifdef MP-WEIXIN
  const soundPath = SOUND_CONFIG.soundPaths[soundType]
  if (!soundPath) {
    return { success: false, message: '音效文件未配置' }
  }

  try {
    const audio = uni.createInnerAudioContext()
    audio.src = soundPath
    audio.volume = volume
    audio.play()
    return { success: true }
  } catch (e) {
    return { success: false, message: e.message }
  }
  // #endif

  return { success: false, message: '非微信小程序环境' }
}

/**
 * App端播放音效
 */
function playSoundApp(soundType, volume) {
  // #ifdef APP-PLUS
  const soundPath = SOUND_CONFIG.soundPaths[soundType]
  if (!soundPath) {
    return { success: false, message: '音效文件未配置' }
  }

  try {
    const player = plus.audio.createPlayer(soundPath)
    player.setVolume(volume * 100)
    player.play()
    return { success: true }
  } catch (e) {
    return { success: false, message: e.message }
  }
  // #endif

  return { success: false, message: '非App环境' }
}

/**
 * 设置音效开关
 * @param {Boolean} enabled - 是否启用音效
 */
export function setSoundEnabled(enabled) {
  SOUND_CONFIG.enabled = enabled
  saveSoundSettings()
}

/**
 * 设置音量
 * @param {Number} volume - 音量 (0-1)
 */
export function setSoundVolume(volume) {
  SOUND_CONFIG.volume = Math.max(0, Math.min(1, volume))
  saveSoundSettings()
}

/**
 * 获取音效设置
 * @returns {Object} { enabled, volume }
 */
export function getSoundSettings() {
  return {
    enabled: SOUND_CONFIG.enabled,
    volume: SOUND_CONFIG.volume
  }
}

/**
 * 保存音效设置到本地存储
 */
function saveSoundSettings() {
  try {
    uni.setStorageSync('soundSettings', JSON.stringify({
      enabled: SOUND_CONFIG.enabled,
      volume: SOUND_CONFIG.volume
    }))
  } catch (e) {
    console.warn('保存音效设置失败:', e)
  }
}

/**
 * 从本地存储加载音效设置
 */
function loadSoundSettings() {
  try {
    const settings = uni.getStorageSync('soundSettings')
    if (settings) {
      const parsed = JSON.parse(settings)
      SOUND_CONFIG.enabled = parsed.enabled !== undefined ? parsed.enabled : true
      SOUND_CONFIG.volume = parsed.volume !== undefined ? parsed.volume : 0.5
    }
  } catch (e) {
    console.warn('加载音效设置失败:', e)
  }
}

/**
 * 快捷音效播放函数
 */
export const playClick = () => playSound(SOUND_TYPES.CLICK)
export const playOpen = () => playSound(SOUND_TYPES.OPEN)
export const playClose = () => playSound(SOUND_TYPES.CLOSE)
export const playCombatStart = () => playSound(SOUND_TYPES.COMBAT_START)
export const playCombatHit = () => playSound(SOUND_TYPES.COMBAT_HIT)
export const playCombatVictory = () => playSound(SOUND_TYPES.COMBAT_VICTORY)
export const playCombatDefeat = () => playSound(SOUND_TYPES.COMBAT_DEFEAT)
export const playReward = () => playSound(SOUND_TYPES.REWARD)
export const playLevelUp = () => playSound(SOUND_TYPES.LEVEL_UP)
export const playSkillUp = () => playSound(SOUND_TYPES.SKILL_UP)
export const playError = () => playSound(SOUND_TYPES.ERROR)
export const playWarning = () => playSound(SOUND_TYPES.WARNING)

// 初始化音效系统
initSoundSystem()