// Bundle the files Orca ships for components panels into resources/plugins/declarative/:
// the guest `orca` module, the `orca/testing` kit, and the Node hooks `orca plugin test` runs with.
// `--check` fails when a checked-in file is stale instead of rewriting it.
import { readFileSync, writeFileSync } from 'node:fs'
import path from 'node:path'
import { build } from 'esbuild'

const ROOT = path.resolve(import.meta.dirname, '../../..', '..')
const OUTPUT_DIR = path.join(ROOT, 'resources', 'plugins', 'declarative')
const DECLARATIVE = path.join(ROOT, 'src', 'shared', 'plugins', 'declarative')
const TESTING = path.join(ROOT, 'src', 'main', 'plugins', 'testing')

export const DECLARATIVE_RUNTIME_OUTPUT = path.join(OUTPUT_DIR, 'orca-runtime.mjs')

/** The kit and the panel must share one runtime instance, so the kit imports the shipped file. */
const runtimeAsSibling = {
  name: 'orca-runtime-as-sibling',
  setup(builder) {
    builder.onResolve({ filter: /runtime\/orca-module$/ }, () => ({
      path: './orca-runtime.mjs',
      external: true
    }))
  }
}

const BUNDLES = [
  {
    file: 'orca-runtime.mjs',
    entry: path.join(DECLARATIVE, 'runtime', 'orca-module.ts'),
    source: 'src/shared/plugins/declarative/runtime/',
    platform: 'browser'
  },
  {
    file: 'orca-testing.mjs',
    entry: path.join(DECLARATIVE, 'testing', 'orca-testing.ts'),
    source: 'src/shared/plugins/declarative/testing/',
    platform: 'node',
    plugins: [runtimeAsSibling]
  },
  {
    file: 'orca-test-hooks.mjs',
    entry: path.join(TESTING, 'plugin-test-hooks.ts'),
    source: 'src/main/plugins/testing/',
    platform: 'node'
  },
  {
    file: 'orca-test-register.mjs',
    entry: path.join(TESTING, 'plugin-test-register.ts'),
    source: 'src/main/plugins/testing/',
    platform: 'node'
  }
]

async function bundle({ file, entry, source, platform, plugins = [] }) {
  const result = await build({
    entryPoints: [entry],
    bundle: true,
    format: 'esm',
    platform,
    target: platform === 'node' ? 'node20' : 'es2022',
    charset: 'utf8',
    legalComments: 'none',
    // The Node files bundle zod and sucrase; minified they stay small in Git and on disk.
    minify: platform === 'node',
    plugins,
    banner: {
      js:
        `// Generated by config/scripts/plugin-build/declarative-runtime/build-plugin-declarative-runtime.mjs from\n` +
        `// ${source}. Do not edit.`
    },
    write: false,
    logLevel: 'silent'
  })
  return { output: path.join(OUTPUT_DIR, file), text: result.outputFiles[0].text }
}

/** Every shipped bundle, as `{ output, text }`. */
export function bundleDeclarativeFiles() {
  return Promise.all(BUNDLES.map(bundle))
}

export async function bundleDeclarativeRuntime() {
  return (await bundle(BUNDLES[0])).text
}

async function main() {
  const bundles = await bundleDeclarativeFiles()
  const check = process.argv.includes('--check')
  for (const { output, text } of bundles) {
    const relativeOutput = path.relative(ROOT, output)
    if (!check) {
      writeFileSync(output, text)
      console.log(`wrote ${relativeOutput}`)
    } else if (readFileSync(output, 'utf8') !== text) {
      console.error(`${relativeOutput} is stale; run pnpm generate:plugin-declarative-runtime`)
      process.exitCode = 1
    }
  }
}

if (process.argv[1] && path.resolve(process.argv[1]) === import.meta.filename) {
  await main()
}