import fs from 'node:fs/promises'
import { fileURLToPath } from 'node:url'
import { defineConfig } from 'rollup'
import esbuild from 'rollup-plugin-esbuild'
import { dts } from 'rollup-plugin-dts'
import fg from 'fast-glob'

const cwd = fileURLToPath(new URL('.', import.meta.url))
const pkg = JSON.parse(await fs.readFile(new URL('./package.json', import.meta.url), 'utf-8'))

const rulesEntry = await fg('./src/**/*.ts', {
  cwd,
  onlyFiles: true,
  ignore: [
    '**/index.ts',
    '**/*.test.ts',
    '**/*.d.ts',
  ],
})

const tsEntry = await fg('./src/**/*.d.ts', {
  cwd,
  onlyFiles: true,
  ignore: [
    '**/index.ts',
    '**/index.test.ts',
  ],
})

const input = [
  './src/index.ts',
  ...rulesEntry.filter(i => !i.includes('.d.ts')),
]

export default defineConfig([
  {
    input,
    output: [
      {
        generatedCode: 'es2015',
        dir: 'dist',
        format: 'es',
        manualChunks(id) {
          if (id.includes('src/index')) {
            return '.'
          }
        },
        chunkFileNames: '[name].js',
      },
    ],
    plugins: [
      esbuild(),
    ],
    external: [
      ...Object.keys(pkg.dependencies || []),
      ...Object.keys(pkg.peerDependencies || []),
    ],
  },
  {
    input: tsEntry,
    output: [
      {
        dir: 'dist/types',
      },
    ],
    plugins: [
      dts(),
    ],
  },
])