import { resolve as pathResolve } from 'path';
import * as fs from 'fs';
import { logger } from '@spine/logger';
import { cliAnalyzeHook } from '../hooks';
import { getBuildPath } from '@erect/core/paths';
import { config } from '@erect/core/config';
import { webpackConfigFactory } from '../webpack/configFactory';
import { createBuildOptions } from '../webpack/createBuildOptions';
import { exec } from '../utils';

export const log = logger('erect:analyze');


cliAnalyzeHook.addAction('default', () => {
  const anaylzeFilePath = pathResolve(
    getBuildPath(),
    config.bundles.client.buildOutputDir,
    '__analyze__.json',
  );

  const webpackFactory = webpackConfigFactory(
    createBuildOptions({
      target: 'client',
      optimize: true,
    }),
    log,
  );

  const clientCompiler = webpackFactory.compile();

  clientCompiler.run((err, stats) => {
    if (err != null) {
      console.error(err);
    } else {
      // Write out the json stats file.
      fs.writeFileSync(
        anaylzeFilePath,
        JSON.stringify(stats.toJson('verbose'), null, 4)
      );

      // Run the bundle analyzer against the stats file.
      const cmd = `webpack-bundle-analyzer ${anaylzeFilePath} ${config.bundles.client.buildOutputDir}`;
      exec(cmd);
    }
  });
}, { priority: 50 });