const fetch = require('node-fetch');

module.exports = async function wget(params) {
  const { url } = params;
  if (!url) throw new Error('missing url');
  const res = await fetch(url);
  const buffer = await res.buffer();
  const filename = url.split('/').filter(Boolean).pop() || 'index.html';
  const content = buffer.slice(0, 500).toString('utf8');
  return { filename, content };
};

// metadata for the tool runner
module.exports.meta = {
  type: 'function',
  name: 'wget',
  description: 'Download URL to filesystem',
  strict: true,
  parameters: {
    type: 'object',
    required: ['url'],
    additionalProperties: false,
    properties: {
      url: { type: 'string', description: 'The url to get.' }
    }
  }
};