#!/usr/bin/env node
// -*- mode: js -*-
// vim: set ft=javascript :
"use strict";

var babel = require('babel-core');

var constants = require('../vendor/constants')(babel);

require("commoner").version(
  require("../package.json").version
).resolve(function(id) {
  var context = this;

  // Note that the result of context.getProvidedP() is cached for the
  // duration of the build, so it is both consistent and cheap to
  // evaluate multiple times.
  return context.getProvidedP().then(function(idToPath) {
    // If a module declares its own identifier using @providesModule
    // then that identifier will be a key in the idToPath object.
    if (idToPath.hasOwnProperty(id)) {
      return context.readFileP(idToPath[id]);
    }

    // Otherwise assume the identifier maps directly to a path in the
    // filesystem.
    return context.readModuleP(id);
  });

}).process(function(id, source) {
  var context = this;

  // This is where JSX, ES6, etc. desugaring happens.
  source = babel.transform(source, {
    blacklist: ['spec.functionName', 'validation.react'],
    plugins: [constants],
    filename: id
  }).code;

  if (context.config.mocking) {
    // Make sure there is exactly one newline at the end of the module.
    source = source.replace(/\s+$/m, "\n");

    return context.getProvidedP().then(function(idToPath) {
      if (id !== "mock-modules" &&
          id !== "mocks" &&
          id !== "test/all" &&
          idToPath.hasOwnProperty("mock-modules")) {
        return source + '\nrequire("mock-modules").register(' +
          JSON.stringify(id) + ', module);\n';
      }

      return source;
    });
  }

  return source;
});