import {
  FuseBox, EnvPlugin, QuantumPlugin, WebIndexPlugin, CSSPlugin,
  JSONPlugin, Sparky, File, CopyPlugin, WorkFlowContext, BabelPlugin
} from "fuse-box";
import {BuildOptions, getCommonBuildOptions, getEnvironments, NodeEnv, OcastEnv} from "./BuildOptions";

/**
 * Sets up a FuseBox ready to either run a development server or produce builds.
 * All required configuration is already hardcoded in this function.
 * You may however choose to pass in additional options to customize your dev or build experience to your liking.
 *
 * NOTE: Running this function only sets up and configures the Bundle and FuseBox interfaces.
 * You will have to interact with these interfaces to proceed with serving or building.
 * See fuse-box docs for more information.
 *
 * @returns {{vendor: Bundle; app: Bundle; fuse: FuseBox}}
 */
function setupFuse (ocastEnv: OcastEnv, nodeEnv: NodeEnv, options: BuildOptions = {}) {
  const fuse = FuseBox.init({
    homeDir: "app",
    sourceMaps: {project: options.sourceMaps, vendor: false},
    hash: options.hashFilenames,
    modulesFolder: "app",
    alias: {
      src: "~/src/",
      config: "~/config/"
    },
    target: "browser",
    output: `${options.outputFolder}/$name.js`,
    warnings: true,
    cache: options.hmr, // fuse-box requires cache to be on to support hmr
    log: options.log,
    debug: options.debug,
    tsConfig: "tsconfig.json",
    useTypescriptCompiler: false,
    plugins: [
      EnvPlugin({
        NODE_ENV: JSON.stringify(nodeEnv),
        OCAST_CONFIG: JSON.stringify(ocastEnv)
      }),
      BabelPlugin({
        test: /\.jsx?$/,
        extensions: [".jsx", ".js"],
        config: {
          sourceMaps: options.sourceMaps,
          presets: ["flow", "react", "stage-0"]
        }
      }),
      WebIndexPlugin({title: "Ocast", path: "."}),
      CopyPlugin({files: ["*.png", "*.jpg", "*.ogg"], dest: "assets", useDefault: false}),
      CSSPlugin(),
      JSONPlugin(),
      options.minify ?
        QuantumPlugin({
          treeshake: true,
          uglify: true
        }) : undefined
    ]
  });

  const vendor = fuse.bundle("vendor");
    //.instructions(`~ src/client.js`);

  const app = fuse.bundle("app")
    .instructions(`!> [src/client.js]`);

  if (options.hmr) {
    app.hmr();
  }

  return {vendor, app, fuse};
}

/**
 * An extension of `setupFuse()` that also reads the ocast and node environment settings
 * from the system environment variables and defaults BuildOptions to options
 * common for the environments found (See  `getCommonBuildOptions()`).
 * You can extend these options using `additionalOptions`.
 */
function autoSetupFuse (additionalOptions: BuildOptions = {}) {
  const {ocastEnv, nodeEnv} = getEnvironments();
  const options = {
    ...getCommonBuildOptions(ocastEnv, nodeEnv),
    ...additionalOptions
  };

  return {
    ...setupFuse(ocastEnv, nodeEnv, options),
    options
  };
}


/**
 * Serves ocast through the fuse-box development server.
 */
Sparky.task("dev-server", () => {
  const {fuse, app} = autoSetupFuse();
  app.watch();
  fuse.dev();
  return fuse.run();
});

/**
 * Builds ocast to the configured output folder
 */
Sparky.task("build", () => {
  const {fuse, options} = autoSetupFuse();
  Sparky.src(options.outputFolder).clean(options.outputFolder);
  return fuse.run();
});