import chalk from 'chalk';
import path from 'node:path';
import * as esbuild from 'esbuild';
import { TopLevelDirectoryName, CodeDirectoryName } from '../domain/file-names';
import { existsAsync, rmAsync } from '../helpers/fs-helpers';
import { symbols } from '../helpers/symbols';
import { runWithSpinner } from '../helpers/spinner';

const ENTRY_FILE = 'index.ts';
const OUTPUT_FILE = 'index.js';

export const tsBuild = async () => {
  const directory = path.join('./');
  const srcPath = path.join(directory, TopLevelDirectoryName.Code, CodeDirectoryName.Src);
  const buildDirPath = path.join(directory, TopLevelDirectoryName.Code, CodeDirectoryName.Build);

  const entryPoint = path.join(srcPath, ENTRY_FILE);
  if (!(await existsAsync(entryPoint))) {
    throw new Error(`Entry file '${TopLevelDirectoryName.Code}/${CodeDirectoryName.Src}/${ENTRY_FILE}' not found.`);
  }

  await rmAsync(buildDirPath, { recursive: true, force: true });

  await runWithSpinner(`Bundling from ${TopLevelDirectoryName.Code}/${CodeDirectoryName.Src}/${ENTRY_FILE}...`, () =>
    esbuild.build({
      entryPoints: [entryPoint],
      bundle: true,
      outfile: path.join(buildDirPath, OUTPUT_FILE),
      platform: 'node',
      target: 'es2022',
      format: 'cjs',
      sourcemap: 'inline',
    }),
  );

  console.log(chalk.green(`  ${symbols.success}${OUTPUT_FILE}`));
  console.log(
    chalk.green(
      `\nBuild complete. Output written to ${TopLevelDirectoryName.Code}/${CodeDirectoryName.Build}/${OUTPUT_FILE}`,
    ),
  );
};