import path from 'path';
import nodeResolve from 'rollup-plugin-node-resolve';
import babel from 'rollup-plugin-babel';
import replace from 'rollup-plugin-replace';
import commonjs from 'rollup-plugin-commonjs';
import filesize from 'rollup-plugin-filesize';
import visualizer from 'rollup-plugin-visualizer';
import { terser } from 'rollup-plugin-terser';
import banner from 'rollup-plugin-banner';

import pkg from './package.json';

const BANNER = `
  @license
	xxx - xxx.js - ${pkg.version}
	Released under the ISC License!.
`;

const SOURCE_DIR = path.resolve(__dirname, 'src');
const DIST_DIR = path.resolve(__dirname, 'dist');
const BUILD_NAME = 'gergr';

const baseConfig = {
  input: `${SOURCE_DIR}/index.js`,
  plugins: [
    replace({ 'process.env.NODE_ENV': JSON.stringify('production') }),
    nodeResolve({
      jsnext: true
    }),
    babel({
      exclude: '**/node_modules/**'
    }),
    banner(BANNER),
    filesize()
  ]
};

const esConfig = Object.assign({}, baseConfig, {
  output: {
    file: `${DIST_DIR}/${BUILD_NAME}.es.js`,
    format: 'esm',
    sourcemap: true
  },
  external: [...Object.keys(pkg.peerDependencies), ...Object.keys(pkg.dependencies)]
});

const cjsConfig = Object.assign({}, esConfig, {
  output: {
    file: `${DIST_DIR}/${BUILD_NAME}.cjs.js`,
    format: 'cjs',
    sourcemap: true
  },
  plugins: [
    ...esConfig.plugins,
    visualizer({
      filename: './stats/stats.html',
      title: 'gregreger - Stats'
    })
  ]
});

const globals = {
  react: 'React',
  'react-dom': 'ReactDom',
  'styled-components': 'styled'
};

const umdConfig = Object.assign({}, baseConfig, {
  output: {
    name: 'gergerg',
    file: `${DIST_DIR}/${BUILD_NAME}.js`,
    exports: 'named',
    sourcemap: false,
    format: 'umd',
    globals
  },
  external: Object.keys(globals),
  plugins: [...baseConfig.plugins, nodeResolve({ browser: true }), commonjs()]
});

const minConfig = Object.assign({}, umdConfig, {
  output: {
    ...umdConfig.output,
    sourcemap: true,
    file: `${DIST_DIR}/${BUILD_NAME}.min.js`
  },
  plugins: [
    terser({
      ie8: true,
      safari10: true,
      numWorkers: 1,
      compress: {
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
        warnings: false
      },
      output: {
        comments(node, comment) {
          const { type, value } = comment;
          if (type === 'comment2') return /@preserve|@license|@cc_on/i.test(value);
          return false;
        }
      }
    }),
    ...umdConfig.plugins
  ]
});

export default [esConfig, cjsConfig, umdConfig, minConfig];

import banner from 'rollup-plugin-banner';

export default {
  input: 'src/index.js',
  output: {
    file: 'dist/index.js',
    format: 'cjs',
    sourcemap: true
  },
  plugins: [
    // Declare shebang
    banner('#/usr/bin/env node')
  ]
};