const { resolve, relative, extname } = require('path');
const { readdirSync } = require('fs');
const typescript = require('@rollup/plugin-typescript');
const { default: alias } = require('@rollup/plugin-alias');

/**
 * @type {import('rollup').RollupOptions}
 */
const config = {
  external: ['jl-graphic'],
  input: getEntryPoints('src/packages', 'src'),
  output: {
    dir: 'components',
    format: 'esm',
    preserveModules: true,
  },
  plugins: [
    alias({
      entries: [{ find: 'common', replacement: 'src/common' }],
    }),
    typescript({
      tsconfig: './tsconfig.json',
      compilerOptions: {
        declaration: true,
        declarationDir: 'components',
      },
    }),
  ],
};
module.exports = config;

function getEntryPoints(dir, root) {
  let entries = {};
  const items = readdirSync(dir, { withFileTypes: true });
  for (const item of items) {
    const fullPath = resolve(dir, item.name);
    const relativePath = relative(root, fullPath);
    const relativeName = relativePath.replace(extname(item.name), '');
    if (item.isDirectory()) {
      const subentries = getEntryPoints(fullPath, root);
      entries = { ...entries, ...subentries };
    } else {
      entries[relativeName] = fullPath;
    }
  }
  return entries;
}