// tsup.config.ts
import { defineConfig } from 'tsup'
import fs from 'node:fs'
import path from 'node:path'

// --- 0) Atualiza package.json antes do build (determinístico) ---
const pkgPath = path.resolve('package.json')
const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf8'))

// Define os campos ao estilo “dayjs-like”: 1 entry CJS + 1 bundle global
const nextPkg = {
  ...pkg,
  main: 'dist/index.cjs',           // Node / SSR (require)
  types: 'dist/index.d.ts',         // Tipos
  // NÃO usar "module" aqui (muitos bundlers esperam ESM) — deixa sem.
  browser: 'dist/index.global.js',  // Browser sem bundler (<script>)
  unpkg: 'dist/index.global.js',    // CDN unpkg
  jsdelivr: 'dist/index.global.js', // CDN jsDelivr
  // Remove conflitos:
  type: undefined as unknown as string,
  exports: undefined as unknown as Record<string, unknown>,
}
// Remove chaves undefined de fato
Object.keys(nextPkg).forEach((k) => {
  // @ts-ignore
  if (nextPkg[k] === undefined) delete (nextPkg as any)[k]
})
fs.writeFileSync(pkgPath, JSON.stringify(nextPkg, null, 2) + '\n')

// --- 1) Externals automáticos (não embutir deps/peerDeps) ---
const external = [
  ...Object.keys(pkg.dependencies ?? {}),
  ...Object.keys(pkg.peerDependencies ?? {}),
]

// --- 2) Configuração tsup: CJS + IIFE (global) ---
export default defineConfig([
  // 2.1) Bundle CJS para Node/SSR (gera dist/index.cjs + dist/index.d.ts)
  {
    entry: { index: 'src/index.ts' },
    outDir: 'dist',
    format: ['cjs'],
    dts: true,                    // tipos aqui (um só lugar)
    platform: 'neutral',          // evita polyfills de node
    target: 'es2018',
    treeshake: true,
    sourcemap: false,
    minify: true,
    clean: true,                  // limpa dist apenas nesta job
    external,
    skipNodeModulesBundle: true,
    outExtension: () => ({ js: '.cjs' }),
  },

  // 2.2) Bundle global para browser (IIFE) → dist/index.global.js
  {
    entry: { index: 'src/index.ts' },
    outDir: 'dist',
    format: ['iife'],
    dts: false,                   // tipos já emitidos na primeira
    platform: 'browser',
    target: 'es2015',
    globalName: 'PComuns',        // expõe window.PComuns
    treeshake: true,
    sourcemap: false,
    minify: true,
    clean: false,
    external,                     // mantém deps externas se houver
    skipNodeModulesBundle: true,
    outExtension: () => ({ js: '.global.js' }),
  },
])