#!/usr/bin/env node
'use strict';

/**
 * Dependencies
 */
const {argv} = require('yargs');
const replace = require('../lib/replace-in-file');
const loadConfig = require('../lib/helpers/load-config');
const combineConfig = require('../lib/helpers/combine-config');
const errorHandler = require('../lib/helpers/error-handler');
const successHandler = require('../lib/helpers/success-handler');

//Extract parameters
const {configFile} = argv;

//Verify arguments
if (argv._.length < 3 && !configFile) {
  errorHandler('Replace in file needs at least 3 arguments');
}

//Load config and combine with passed arguments
const config = loadConfig(configFile);
const options = combineConfig(config, argv);

//Extract settings
const {from, to, files, isRegex, verbose, quiet} = options;

//Single star globs already get expanded in the command line
options.files = files.reduce((files, file) => {
  return files.concat(file.split(','));
}, []);

//If the isRegex flag is passed, convert the from parameter to a RegExp object
if (isRegex) {
  const flags = from.replace(/.*\/([gimyus]*)$/, '$1');
  const pattern = from.replace(new RegExp(`^/(.*?)/${flags}$`), '$1');
  try {
    options.from = new RegExp(pattern, flags);
  }
  catch (error) {
    errorHandler(error, 'Error creating RegExp from `from` parameter');
  }
}

//Log
if (!quiet) {
  console.log(`Replacing '${from}' with '${to}'`);
}

//Replace
try {
  const results = replace.sync(options);
  if (!quiet) {
    successHandler(results, verbose);
  }
}
catch (error) {
  errorHandler(error);
}