// API 基地址：Tauri 生产环境使用绝对路径，浏览器环境使用相对路径
// 导出供 SSE、媒体文件等非 fetch 场景使用
const BASE = window.location.protocol === 'http:' || window.location.protocol === 'https:'
  ? ''  // 浏览器环境 — 同源请求
  : 'http://localhost:10801';  // Tauri 生产环境 (tauri://)
export const API_BASE = BASE;

async function request(url, options = {}) {
  const res = await fetch(`${BASE}${url}`, {
    headers: { 'Content-Type': 'application/json' },
    ...options,
  });
  return res.json();
}

function formEncode(data) {
  return Object.entries(data)
    .map(([k, v]) => `${encodeURIComponent(k)}=${encodeURIComponent(v)}`)
    .join('&');
}

// ============ Auth ============
export async function login(username, password) {
  const res = await fetch(`${BASE}/api/login`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    body: formEncode({ username, password }),
  });
  return res.json();
}

// ============ Settings ============
export async function getSettings() {
  const res = await fetch(`${BASE}/api/settings`);
  return res.json();
}

export async function updateSettings(data) {
  return request('/api/settings', {
    method: 'POST',
    body: JSON.stringify(data),
  });
}

// ============ Media Files ============
export async function getMediaFiles() {
  const res = await fetch(`${BASE}/media`);
  return res.json();
}

export async function uploadFiles(files) {
  for (const file of files) {
    const fd = new FormData();
    fd.append('file', file);
    await fetch(`${BASE}/upload`, { method: 'POST', body: fd });
  }
}

export async function addUrlMedia(url) {
  return request('/api/media/add-url', {
    method: 'POST',
    body: JSON.stringify({ url }),
  });
}

export async function deleteMedia(path) {
  return request('/api/delete', {
    method: 'POST',
    body: JSON.stringify({ path }),
  });
}

// ============ Playlist ============
export async function getPlaylist() {
  const res = await fetch(`${BASE}/api/playlist`);
  return res.json();
}

export async function addToPlaylist(path) {
  return request('/api/playlist/add', {
    method: 'POST',
    body: JSON.stringify({ path }),
  });
}

export async function removeFromPlaylist(path) {
  return request('/api/playlist/remove', {
    method: 'POST',
    body: JSON.stringify({ path }),
  });
}

// ============ Playback Control ============
export async function sendControl(action) {
  return request('/api/control', {
    method: 'POST',
    body: JSON.stringify({ action }),
  });
}

export async function getState() {
  const res = await fetch(`${BASE}/api/state`);
  return res.json();
}

export async function updateState(state) {
  return request('/api/state', {
    method: 'POST',
    body: JSON.stringify({ state }),
  });
}