import resolve from '@rollup/plugin-node-resolve';
import typescript from 'rollup-plugin-typescript2';
import peerDepsExternal from 'rollup-plugin-peer-deps-external';
import postcss from 'rollup-plugin-postcss';
import commonjs from '@rollup/plugin-commonjs';
import babel from '@rollup/plugin-babel';
import { terser } from 'rollup-plugin-terser';

const extensions = ['.js', '.jsx', '.ts', '.tsx', '.css'];

function setUpRollup({ input, output }) {
  return {
    input,
    output,
    watch: {
      include: '*',
      exclude: 'node_modules/**',
    },
    plugins: [
      peerDepsExternal(),
      resolve({ extensions }),
      commonjs({
        include: /node_modules/,
      }),
      typescript({ useTsconfigDeclarationDir: true, module: 'esnext' }),
      postcss({
        extract: true,
        modules: true,
        sourceMap: true,
        config: {
          path: './postcss.config.js',
        },
      }),
      babel({
        babelHelpers: 'bundled',
        presets: ['@babel/preset-env', '@babel/preset-react', '@babel/preset-typescript'],
        extensions: ['.js', '.jsx', '.ts', '.tsx'],
      }),
      terser(),
    ],
    external: ['react', 'react-dom'],
  };
}

export default [
  setUpRollup({
    input: 'index.tsx',
    output: {
      file: 'dist/cjs.js',
      sourcemap: true,
      format: 'cjs',
      assetFileNames: '[name]-[hash][extname]',
    },
  }),
  setUpRollup({
    input: 'index.tsx',
    output: {
      file: 'dist/esm.js',
      sourcemap: true,
      format: 'esm',
      assetFileNames: '[name]-[hash][extname]',
    },
  }),
  setUpRollup({
    input: './styles/globals.css',
    output: {
      file: 'dist/global.css',
      sourcemap: true,
      format: 'esm',
    },
  }),
];