// Midway后端API
// 使用相对路径，通过Vite代理转发到后端
const BASE_URL = ''

async function request(path, options = {}) {
  // 使用相对路径，Vite会通过代理转发到后端
  const url = path.startsWith('/') ? path : `/${path}`
  const { method = 'GET', body, params = {} } = options
  
  // 构建URL，添加查询参数
  let requestUrl = url
  if (method === 'GET' && params && Object.keys(params).length > 0) {
    const searchParams = new URLSearchParams()
    Object.entries(params).forEach(([k, v]) => {
      if (v !== undefined && v !== null && v !== '') {
        searchParams.append(k, v)
      }
    })
    const queryString = searchParams.toString()
    if (queryString) {
      requestUrl += `?${queryString}`
    }
  }
  
  const config = {
    method,
    headers: {
      'Content-Type': 'application/json',
    },
  }
  
  if (body && method !== 'GET') {
    config.body = JSON.stringify(body)
  }
  
  const res = await fetch(requestUrl, config)
  if (!res.ok) throw new Error(`HTTP ${res.status}`)
  const data = await res.json()
  
  if (!data.success) {
    throw new Error(data.message || '请求失败')
  }
  
  return data.data
}

/**
 * 搜索歌曲
 */
export async function searchSongs(keywords, limit = 20) {
  return await request('/api/music/search', {
    method: 'GET',
    params: { keywords, limit }
  })
}

/**
 * 获取歌曲详情
 */
export async function getSongDetail(id) {
  return await request(`/api/music/song/${id}/detail`, {
    method: 'GET'
  })
}

/**
 * 获取歌曲播放URL
 */
export async function getSongUrlV1(id, level = 'standard') {
  const data = await request(`/api/music/song/${id}/url`, {
    method: 'GET',
    params: { level }
  })
  return data.url || ''
}

/**
 * 获取播放队列
 */
export async function getQueue() {
  return await request('/api/music/queue', {
    method: 'GET'
  })
}

/**
 * 添加到播放队列
 */
export async function addToQueue(song) {
  const result = await request('/api/music/queue/add', {
    method: 'POST',
    body: { song }
  })
  return result
}

/**
 * 播放下一首
 */
export async function playNext() {
  const result = await request('/api/music/queue/play-next', {
    method: 'POST'
  })
  return result
}

/**
 * 清空队列
 */
export async function clearQueue() {
  return await request('/api/music/queue/clear', {
    method: 'POST'
  })
}

/**
 * 从队列移除歌曲
 */
export async function removeFromQueue(songId) {
  return await request('/api/music/queue/remove', {
    method: 'POST',
    body: { songId }
  })
}

/**
 * 获取歌词
 */
export async function getLyric(id) {
  const data = await request(`/api/music/song/${id}/lyric`, {
    method: 'GET'
  })
  return data || { raw: '', tlyric: '' }
}

/**
 * 设置当前播放歌曲
 */
export async function setPlaybackSong(songId) {
  return await request('/api/music/playback/set-song', {
    method: 'POST',
    body: { songId }
  })
}

/**
 * 播放控制 - 播放
 */
export async function play() {
  return await request('/api/music/playback/play', {
    method: 'POST'
  })
}

/**
 * 播放控制 - 暂停
 */
export async function pause() {
  return await request('/api/music/playback/pause', {
    method: 'POST'
  })
}

/**
 * 播放控制 - 跳转时间
 */
export async function seek(time) {
  return await request('/api/music/playback/seek', {
    method: 'POST',
    body: { time }
  })
}

/**
 * 获取当前播放状态
 */
export async function getPlaybackState() {
  return await request('/api/music/playback/state', {
    method: 'GET'
  })
}

export function getBaseUrl() {
  // 返回空字符串，使用相对路径通过代理
  return ''
}