import * as plugins from './tsbundle.plugins';
import { logger } from './tsbundle.logging';

export class TsBundleProcess {
  /**
   * the basic default options for rollup
   */
  public getBaseOptions(
    fromArg: string = `ts_web/index.ts`,
    toArg: string = 'dist_bundle/bundle.js'
  ) {
    logger.log('info', `from: ${fromArg}`);
    logger.log('info', `to: ${toArg}`);

    const baseOptions: plugins.rollup.RollupOptions = {
      input: fromArg,
      output: {
        name: 'tsbundle',
        file: toArg,
        format: 'iife',
        sourcemap: true,
      },
      // Indicate here external modules you don't wanna include in your bundle (i.e.: 'lodash')
      external: [],
      watch: {
        include: ['src/**'],
      },
      plugins: [
        // Compile TypeScript files
        plugins.rollupTypescript({
          include: plugins.path.parse(fromArg).dir
            ? plugins.path.parse(fromArg).dir + '/**/*.ts'
            : '**/*.ts',
          declaration: false,
          emitDecoratorMetadata: true,
          experimentalDecorators: true,
          inlineSourceMap: true,
          noEmitOnError: true,
          lib: ['esnext', 'dom', 'es2017.object'],
          noImplicitAny: false,
          target: 'es2018',
          allowSyntheticDefaultImports: true,
          importsNotUsedAsValues: 'preserve',
        }),
        plugins.rollupJson(),
        // Allow node_modules resolution, so you can use 'external' to control
        // which external modules to include in the bundle
        // https://github.com/rollup/rollup-plugin-node-resolve#usage
        plugins.rollupResolve(),
        plugins.rollupCommonjs({}),

        // Resolve source maps to the original source
        plugins.rollupSourceMaps(),
        /*plugins.rollupBabel({
          runtimeHelpers: true,
          extensions: ['.js', '.jsx', '.ts', '.tsx'],
          babelrc: false,
          presets: [
            [
              '@babel/preset-env',
              {
                modules: false,
                targets: {
                  chrome: '41'
                }
              }
            ]
          ],
          plugins: [
            [
              '@babel/plugin-transform-runtime',
              {
                regenerator: true
              }
            ]
          ]
        })*/
      ],
    };
    return baseOptions;
  }

  public getOptionsTest(fromArg: string, toArg: string): plugins.rollup.RollupOptions {
    return this.getBaseOptions(fromArg, toArg);
  }

  public getOptionsProduction(fromArg: string, toArg: string): plugins.rollup.RollupOptions {
    const productionOptions = this.getBaseOptions(fromArg, toArg);
    productionOptions.plugins.push(
      plugins.rollupTerser({
        compress: true,
        mangle: true
      })
    );
    return productionOptions;
  }

  constructor() {
    // Nothing here
  }

  /**
   * creates a bundle for the test enviroment
   */
  public async buildTest(
    fromArg: string,
    toArg: string,
    bundlerArg: 'rollup' | 'parcel' = 'rollup'
  ) {
    // create a bundle
    switch (bundlerArg) {
      case 'rollup':
        logger.log('info', `bundling for TEST!`);
        const buildOptions = this.getOptionsTest(fromArg, toArg);
        const bundle = await plugins.rollup.rollup(buildOptions);
        bundle.generate(buildOptions.output as plugins.rollup.OutputOptions);
        await bundle.write(buildOptions.output as plugins.rollup.OutputOptions);
        logger.log('ok', `Successfully bundled files!`);
        process.exit(0);
      case 'parcel':
        const parsedPath = plugins.path.parse(toArg);
        const parcelInstance = new plugins.smartparcel.Parcel(fromArg, parsedPath.dir, parsedPath.base);
        await parcelInstance.build();
    }
  }

  /**
   * creates a bundle for the production environment
   */
  public async buildProduction(fromArg: string, toArg: string) {
    // create a bundle
    logger.log('info', `bundling for PRODUCTION!`);
    const buildOptions = this.getOptionsProduction(fromArg, toArg);
    const bundle = await plugins.rollup.rollup(buildOptions);
    bundle.generate(buildOptions.output as plugins.rollup.OutputOptions);
    await bundle.write(buildOptions.output as plugins.rollup.OutputOptions);
    logger.log('ok', `Successfully bundled files!`);
    process.exit(0);
  }
}

const run = async () => {
  console.log('running spawned compilation process');
  console.log(`cwd: ${process.env.tsbundleCwd}`);
  console.log(`from: ${process.env.tsbundleFrom}`);
  console.log(`to: ${process.env.tsbundleTo}`);
  console.log(`mode: ${process.env.tsbundleMode}`);
  process.chdir(process.env.tsbundleCwd);
  console.log(`switched to ${process.cwd()}`)
  const tsbundleProcessInstance = new TsBundleProcess();
  if (process.env.tsbundleMode === 'test') {
    tsbundleProcessInstance.buildTest(process.env.tsbundleFrom, process.env.tsbundleTo, process.env.tsbundleBundler as 'rollup' | 'parcel');
  } else {
    tsbundleProcessInstance.buildProduction(process.env.tsbundleFrom, process.env.tsbundleTo);
  }
}

run();