/* eslint key-spacing:0 spaced-comment:0 */
import path from "path";
import _debug from "debug";
import { argv } from "yargs";
import ip from "ip";

const localip = ip.address();
const debug = _debug("app:config");
debug("Creating default configuration.");

// ========================================================
// Default Configuration
// ========================================================
const config = {
  env: process.env.NODE_ENV || "production",

  // ----------------------------------
  // Project Structure
  // ----------------------------------
  path_base: path.resolve(__dirname, ".."),
  dir_client: "src",
  dir_dist: "dist",
  dir_server: "server",
  dir_test: "tests",

  // ----------------------------------
  // Server Configuration
  // ----------------------------------
  server_host: process.env.FRONTEND_HOST || localip, // use string 'localhost' to prevent exposure on local network
  server_port: process.env.PORT || 3000,

  // ----------------------------------
  // Compiler Configuration
  // ----------------------------------
  compiler_css_modules: true,
  compiler_devtool: "source-map",
  compiler_hash_type: "hash",
  compiler_fail_on_warning: false,
  compiler_quiet: false,
  compiler_public_path: "/",
  compiler_stats: {
    chunks: false,
    chunkModules: false,
    colors: true,
  },
  compiler_vendor: [
    "babel-polyfill",
    "history",
    "react",
    "react-redux",
    "react-router",
    "react-router-redux",
    "redux",
  ],

  // ----------------------------------
  // Test Configuration
  // ----------------------------------
  coverage_reporters: [
    { type: "text-summary" },
    { type: "lcov", dir: "coverage" },
  ],
};

/************************************************
-------------------------------------------------

All Internal Configuration Below
Edit at Your Own Risk

-------------------------------------------------
************************************************/

// ------------------------------------
// Environment
// ------------------------------------
// N.B.: globals added here must _also_ be added to .eslintrc
config.globals = {
  "process.env": {
    NODE_ENV: JSON.stringify(config.env),
  },
  NODE_ENV: config.env,
  __DEV__: config.env === "development",
  __PROD__: config.env === "production",
  __TEST__: config.env === "test",
  __DEBUG__: config.env === "development" && !argv.no_debug,
  __COVERAGE__: !argv.watch && config.env === "test",
  __BASENAME__: JSON.stringify(process.env.BASENAME || ""),
};

// ------------------------------------
// Validate Vendor Dependencies
// ------------------------------------
const pkg = require("../package.json");

config.compiler_vendor = config.compiler_vendor.filter((dep) => {
  if (pkg.dependencies[dep]) return true;

  debug(
    `Package "${dep}" was not found as an npm dependency in package.json; ` +
      `it won't be included in the webpack vendor bundle.
       Consider removing it from vendor_dependencies in ~/config/index.js`
  );
});

// ------------------------------------
// Utilities
// ------------------------------------
const resolve = path.resolve;
const base = (...args) =>
  Reflect.apply(resolve, null, [config.path_base, ...args]);

config.utils_paths = {
  base: base,
  client: base.bind(null, config.dir_client),
  dist: base.bind(null, config.dir_dist),
};

// ========================================================
// Environment Configuration
// ========================================================
debug(`Looking for environment overrides for NODE_ENV "${config.env}".`);
const environments = require("./environments").default;
const overrides = environments[config.env];
if (overrides) {
  debug("Found overrides, applying to default configuration.");
  Object.assign(config, overrides(config));
} else {
  debug("No environment overrides found, defaults will be used.");
}

export default config;