import { readFileSync } from 'node:fs'
import { dirname, join } from 'node:path'
import { fileURLToPath } from 'node:url'

import terser from '@rollup/plugin-terser'
import browserslistToEsbuild from 'browserslist-to-esbuild'
import { defineConfig } from 'vite'
import dts from 'vite-plugin-dts'

const __dirname = dirname(fileURLToPath(import.meta.url))
const pkg = JSON.parse(readFileSync(join(__dirname, 'package.json'), 'utf8')) as {
  peerDependencies?: Record<string, string>
}
const peerDeps = Object.keys(pkg.peerDependencies || {})

export default defineConfig({
  build: {
    target: browserslistToEsbuild(),
    lib: {
      entry: 'src/index.ts',
      formats: ['es', 'cjs'],
      fileName: 'index',
    },
    rolldownOptions: {
      external: ['node:path', 'node:fs', ...peerDeps],
      plugins: [terser()],
    },
  },
  plugins: [
    dts({
      entryRoot: './src',
    }),
  ],
})