/**
 * Replaces React Native's default Metro landing page ("Welcome to React Native")
 * with EventBuzz Checkins instructions. Runs before `npm start` and on postinstall.
 */
const fs = require('fs');
const path = require('path');

const source = path.join(__dirname, '../dev-server/metro-index.html');
const target = path.join(
  __dirname,
  '../node_modules/@react-native-community/cli-server-api/build/index.html',
);

if (!fs.existsSync(source)) {
  console.warn('[patch-metro-index] Source HTML missing:', source);
  process.exit(0);
}

if (!fs.existsSync(path.dirname(target))) {
  console.warn(
    '[patch-metro-index] cli-server-api not installed yet; skip until after npm install.',
  );
  process.exit(0);
}

fs.copyFileSync(source, target);