// Code copied from [Rome](https://github.com/rome/tools/blob/lsp/v0.28.0/npm/rome/scripts/generate-packages.mjs)

import * as fs from 'node:fs';
import { resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

const OXLINT_BIN_NAME = 'oxlint';
const OXLS_BIN_NAME = 'oxc_language_server';
const OXLINT_ROOT = resolve(fileURLToPath(import.meta.url), '../..');
const PACKAGES_ROOT = resolve(OXLINT_ROOT, '..');
const REPO_ROOT = resolve(PACKAGES_ROOT, '..');
const MANIFEST_PATH = resolve(OXLINT_ROOT, 'package.json');

const rootManifest = JSON.parse(
  fs.readFileSync(MANIFEST_PATH).toString('utf-8'),
);

const LIBC_MAPPING = {
  'gnu': 'glibc',
  'musl': 'musl',
};

function generateNativePackage(target) {
  const packageName = `@${OXLINT_BIN_NAME}/${target}`;
  const packageRoot = resolve(PACKAGES_ROOT, `${OXLINT_BIN_NAME}-${target}`);

  // Remove the directory just in case it already exists (it's autogenerated
  // so there shouldn't be anything important there anyway)
  fs.rmSync(packageRoot, { recursive: true, force: true });

  // Create the package directory
  console.log(`Create directory ${packageRoot}`);
  fs.mkdirSync(packageRoot);

  // Generate the package.json manifest
  const { version, author, license, homepage, bugs, repository } = rootManifest;

  const triple = target.split('-');
  const platform = triple[0];
  const arch = triple[1];
  const libc = triple[2] && { libc: [LIBC_MAPPING[triple[2]]] };
  const manifest = {
    name: packageName,
    version,
    author,
    license,
    homepage,
    bugs,
    repository,
    os: [platform],
    cpu: [arch],
    ...libc,
    publishConfig: {
      executableFiles: [
        'oxlint',
        'oxc_language_server',
      ],
    },
  };

  const manifestPath = resolve(packageRoot, 'package.json');
  console.log(`Create manifest ${manifestPath}`);
  fs.writeFileSync(manifestPath, JSON.stringify(manifest));

  // Copy the binary
  const ext = platform === 'win32' ? '.exe' : '';

  const oxlintBinSource = resolve(REPO_ROOT, `${OXLINT_BIN_NAME}-${target}${ext}`);
  const oxlintBinTarget = resolve(packageRoot, `${OXLINT_BIN_NAME}${ext}`);

  const oxlsBinSource = resolve(REPO_ROOT, `${OXLS_BIN_NAME}-${target}${ext}`);
  const oxlsBinTarget = resolve(packageRoot, `${OXLS_BIN_NAME}${ext}`);

  console.log(`Copy linter binary ${oxlintBinSource}`);
  fs.copyFileSync(oxlintBinSource, oxlintBinTarget);
  fs.chmodSync(oxlintBinTarget, 0o755);

  console.log(`Copy language server binary ${oxlsBinSource}`);
  fs.copyFileSync(oxlsBinSource, oxlsBinTarget);
  fs.chmodSync(oxlsBinTarget, 0o755);
}

function writeManifest() {
  const manifestPath = resolve(PACKAGES_ROOT, OXLINT_BIN_NAME, 'package.json');

  const manifestData = JSON.parse(
    fs.readFileSync(manifestPath).toString('utf-8'),
  );

  const nativePackages = TARGETS.map((target) => [
    `@${OXLINT_BIN_NAME}/${target}`,
    rootManifest.version,
  ]);

  manifestData['version'] = rootManifest.version;
  manifestData['optionalDependencies'] = Object.fromEntries(nativePackages);

  console.log(`Update manifest ${manifestPath}`);
  const content = JSON.stringify(manifestData);
  fs.writeFileSync(manifestPath, content);
}

// NOTE: Must update npm/oxlint/bin/oxlint
// and npm/oxlint/bin/oxc_language_server
const TARGETS = [
  'win32-x64',
  'win32-arm64',
  'linux-x64-gnu',
  'linux-arm64-gnu',
  'linux-x64-musl',
  'linux-arm64-musl',
  'darwin-x64',
  'darwin-arm64',
];

for (const target of TARGETS) {
  generateNativePackage(target);
}

writeManifest();