// 使用 fetch 和 FormData 上传文件的示例代码

// 示例 1: 使用 File 对象上传
async function uploadFileUsingFileObject(file: File) {
  const formData = new FormData();
  formData.append('file', file);
  // 可以添加其他字段
  formData.append('filename', file.name);
  formData.append('description', '文件描述');
  formData.append('appKey', 'test');
  formData.append('version', '1.0.0');

  try {
    const response = await fetch('http://localhost:51516/client/router', {
      method: 'POST',
      body: formData,
      // 注意：使用 FormData 时不需要手动设置 Content-Type，
      // 浏览器会自动设置正确的 multipart/form-data 边界
    });

    if (!response.ok) {
      throw new Error(`上传失败: ${response.status} ${response.statusText}`);
    }

    const result = await response.json();
    console.log('上传成功:', result);
    return result;
  } catch (error) {
    console.error('上传出错:', error);
    throw error;
  }
}

// 示例 2: 使用 FileList（如 input[type="file"]）上传
async function uploadFilesUsingFileList(files: FileList) {
  const formData = new FormData();

  // 多个文件使用相同的字段名
  for (let i = 0; i < files.length; i++) {
    formData.append('files', files[i]);
  }

  try {
    const response = await fetch('http://localhost:51516/client/router', {
      method: 'POST',
      body: formData,
    });

    if (!response.ok) {
      throw new Error(`上传失败: ${response.status} ${response.statusText}`);
    }

    const result = await response.json();
    console.log('上传成功:', result);
    return result;
  } catch (error) {
    console.error('上传出错:', error);
    throw error;
  }
}

// 示例 3: 从路径读取文件上传（Node.js 环境，使用 fs 和 Blob）
import fs from 'fs';

async function uploadFileFromPath(fileList: string[]) {

  const formData = new FormData();
  for (let m of fileList) {
    const buffer = fs.readFileSync(m);
    const file = new File([buffer], m.split('/').pop()!, {
      type: 'application/octet-stream',
    });
    formData.append('file', file);
  }
  formData.append('appKey', 'test');
  formData.append('version', '1.0.0');

  let token = 'st_n9ycynd4m7wdyw3lejb8plnkyi62uejd'; // 如果需要身份验证，添加令牌
  try {
    const response = await fetch('http://localhost:51516/client/upload' + `?token=${token}`, {
      method: 'POST',
      body: formData,
    });

    if (!response.ok) {
      throw new Error(`上传失败: ${response.status} ${response.statusText}`);
    }

    const result = await response.json();
    console.log('上传成功:', JSON.stringify(result, null, 2));
    return result;
  } catch (error) {
    console.error('上传出错:', error);
    throw error;
  }
}

uploadFileFromPath(['./src/test/remote-app.ts', './src/test/upload-file.ts']);
// 示例 4: 完整的 HTML 使用示例（浏览器环境）
/*
// HTML
// <input type="file" id="fileInput" multiple>
// <button onclick="handleUpload()">上传</button>

async function handleUpload() {
  const fileInput = document.getElementById('fileInput') as HTMLInputElement;
  const files = fileInput.files;

  if (!files || files.length === 0) {
    alert('请选择文件');
    return;
  }

  const formData = new FormData();

  for (let i = 0; i < files.length; i++) {
    formData.append('files', files[i]);
  }

  // 添加额外数据
  formData.append('userId', '12345');
  formData.append('timestamp', Date.now().toString());

  try {
    const response = await fetch('http://localhost:51516/client/router', {
      method: 'POST',
      body: formData,
    });

    if (!response.ok) {
      throw new Error(`上传失败: ${response.status}`);
    }

    const result = await response.json();
    alert('上传成功: ' + JSON.stringify(result));
  } catch (error) {
    alert('上传出错: ' + error);
  }
}
*/

// 示例 5: 带进度监控的上传（浏览器环境）
/*
async function uploadWithProgress(file: File, onProgress: (percent: number) => void) {
  return new Promise((resolve, reject) => {
    const xhr = new XMLHttpRequest();
    const formData = new FormData();
    formData.append('file', file);

    xhr.upload.addEventListener('progress', (e) => {
      if (e.lengthComputable) {
        const percent = (e.loaded / e.total) * 100;
        onProgress(percent);
      }
    });

    xhr.addEventListener('load', () => {
      if (xhr.status === 200) {
        resolve(JSON.parse(xhr.responseText));
      } else {
        reject(new Error(`上传失败: ${xhr.status}`));
      }
    });

    xhr.addEventListener('error', () => reject(new Error('网络错误')));
    xhr.addEventListener('abort', () => reject(new Error('上传被取消')));

    xhr.open('POST', 'http://localhost:51516/client/router');
    xhr.send(formData);
  });
}

// 使用
// const file = fileInput.files[0];
// uploadWithProgress(file, (percent) => {
//   console.log(`上传进度: ${percent.toFixed(1)}%`);
// }).then(result => console.log('完成', result));
*/