#!/usr/bin/env node
var fs = require('fs');
var path = require('path');

console.log('Running hook...');

// TARGET is the variable that you have to specify
// If you run TARGET=prod cordova build
// The hook will look for a file named prod.js inside the config directory
if (process.env.TARGET) {
  var srcFile = path.join('config', process.env.TARGET + '.js');

  // Specify the files you would like to replace.
  // NOTE: The android path is for Cordova 7.
  // If you're running an older version, the path is:
  // "platforms/android/assets/www/index.html"
  var configFilesToReplace = {
    android: 'platforms/android/app/src/main/assets/www/js/defaults.js',
    ios: 'platforms/ios/www/js/defaults.js',
  };

  for (var platform in configFilesToReplace) {
    console.log(
      'Modifying config for platform ' +
        platform +
        ', TARGET=' +
        process.env.TARGET
    );
    var destFile = path.join(configFilesToReplace[platform]);

    if (!fs.existsSync(srcFile)) {
      // Throw an error if the file does not exist
      throw 'Missing config file: ' + srcFile;
    } else {
      console.log('copying ' + srcFile + ' to ' + destFile);
      // The command that replaces the contents of the file
      fs.createReadStream(srcFile).pipe(fs.createWriteStream(destFile));
    }
  }
} else {
  // If not target was specified, do nothing.
  console.log('TARGET environment variable is not set.  Using default values.');
}