import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
import sourceMaps from 'rollup-plugin-sourcemaps'
import camelCase from 'lodash.camelcase'

const pkg = require('./package.json')

const libraryName = 'ht-utility'

var globals = {
  "date-fns": 'dateFns',
  "underscore": "_",
  "jstz": "jstz"
};

export default {
  input: `dist/es/${libraryName}.js`,
  output: [
    { file: pkg.main, name: camelCase(libraryName), format: 'umd', globals },
    { file: pkg.module, format: 'es', globals },
  ],
  sourcemap: true,
  // Indicate here external modules you don't wanna include in your bundle (i.e.: 'lodash')
  external: Object.keys(globals),
  globals,
  watch: {
    include: 'dist/es/**',
  },
  plugins: [
    {
      name: 'replace moment imports',
      transform: code =>
        ({
          code: code.replace(/import\s*\*\s*as\s*moment/g, 'import moment'),
          map: { mappings: '' }
        })
    },
    // Allow bundling cjs modules (unlike webpack, rollup doesn't understand cjs)
    commonjs(),
    // 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
    resolve(),

    // Resolve source maps to the original source
    // sourceMaps(),
  ],
}