// API 基地址 —— 独立 FastAPI 后端（配置见 src/config.js，可用 window.__DPM_API__ 覆盖）
import { API_BASE as BASE } from '../config';

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);
    const res = await fetch(`${BASE}/upload`, { method: 'POST', body: fd });
    if (!res.ok) throw new Error(`上传失败 (${res.status})`);
  }
}

export async function uploadFilesWithProgress(files, onProgress) {
  for (let i = 0; i < files.length; i++) {
    const file = files[i];
    await new Promise((resolve, reject) => {
      const xhr = new XMLHttpRequest();
      xhr.open('POST', `${BASE}/upload`);

      xhr.upload.onprogress = (e) => {
        if (e.lengthComputable) {
          onProgress({
            percent: Math.round((e.loaded / e.total) * 100),
            loaded: e.loaded,
            total: e.total,
            fileName: file.name,
            current: i + 1,
            total: files.length,
          });
        }
      };

      xhr.onload = () => {
        if (xhr.status >= 200 && xhr.status < 300) {
          resolve();
        } else {
          reject(new Error(`上传失败 (${xhr.status})`));
        }
      };

      xhr.onerror = () => reject(new Error('网络错误，请检查连接'));
      xhr.ontimeout = () => reject(new Error('上传超时'));

      const fd = new FormData();
      fd.append('file', file);
      xhr.send(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 }),
  });
}

// ============ Display Commands ============
export async function sendDisplayCommand(action) {
  return request('/api/display-command', {
    method: 'POST',
    body: JSON.stringify({ action }),
  });
}