/**
 * @license
 * Copyright 2025 Qwen
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * Prepares the bundled CLI package for npm publishing
 * This script adds publishing metadata (package.json, README, LICENSE) to dist/
 * All runtime assets (cli.js, vendor/, *.sb) are already in dist/ from the bundle step
 */

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

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const defaultRootDir = path.resolve(__dirname, '..');

export function preparePackage({ rootDir = defaultRootDir } = {}) {
  const distDir = path.join(rootDir, 'dist');

  verifyBundleArtifacts(rootDir, distDir);
  copyDocumentationFiles(rootDir, distDir);
  copyLocales(rootDir, distDir);
  copyExtensionExamples(rootDir, distDir);
  writeDistPackageJson(rootDir, distDir);
  printPackageStructure(distDir);
}

if (isDirectRun()) {
  preparePackage();
}

function isDirectRun() {
  return process.argv[1]
    ? fileURLToPath(import.meta.url) === path.resolve(process.argv[1])
    : false;
}

function verifyBundleArtifacts(rootDir, distDir) {
  const requiredPaths = [
    path.join(distDir, 'cli.js'),
    path.join(distDir, 'vendor'),
    path.join(distDir, 'bundled', 'qc-helper', 'docs'),
  ];

  if (!fs.existsSync(distDir)) {
    console.error('Error: dist/ directory not found');
    console.error('Please run "npm run bundle" first');
    process.exit(1);
  }

  for (const requiredPath of requiredPaths) {
    if (!fs.existsSync(requiredPath)) {
      console.error(
        `Error: Required package artifact not found: ${requiredPath}`,
      );
      console.error('Please run "npm run bundle" first');
      process.exit(1);
    }
  }
}

function copyDocumentationFiles(rootDir, distDir) {
  console.log('Copying documentation files...');
  const filesToCopy = ['README.md', 'LICENSE'];
  for (const file of filesToCopy) {
    const sourcePath = path.join(rootDir, file);
    const destPath = path.join(distDir, file);
    if (fs.existsSync(sourcePath)) {
      fs.copyFileSync(sourcePath, destPath);
      console.log(`Copied ${file}`);
    } else {
      console.warn(`Warning: ${file} not found at ${sourcePath}`);
    }
  }
}

function copyLocales(rootDir, distDir) {
  console.log('Copying locales folder...');
  const localesSourceDir = path.join(
    rootDir,
    'packages',
    'cli',
    'src',
    'i18n',
    'locales',
  );
  const localesDestDir = path.join(distDir, 'locales');

  if (fs.existsSync(localesSourceDir)) {
    copyRecursiveSync(localesSourceDir, localesDestDir);
    console.log('Copied locales folder');
  } else {
    console.warn(`Warning: locales folder not found at ${localesSourceDir}`);
  }
}

function copyExtensionExamples(rootDir, distDir) {
  console.log('Copying extension examples folder...');
  const extensionExamplesDir = path.join(
    rootDir,
    'packages',
    'cli',
    'src',
    'commands',
    'extensions',
    'examples',
  );
  const extensionExamplesDestDir = path.join(distDir, 'examples');

  if (fs.existsSync(extensionExamplesDir)) {
    copyRecursiveSync(extensionExamplesDir, extensionExamplesDestDir);
    console.log('Copied extension examples folder');
  } else {
    console.warn(
      `Warning: extension examples folder not found at ${extensionExamplesDir}`,
    );
  }
}

function writeDistPackageJson(rootDir, distDir) {
  console.log('Creating package.json for distribution...');
  const rootPackageJson = JSON.parse(
    fs.readFileSync(path.join(rootDir, 'package.json'), 'utf-8'),
  );

  const distPackageJson = {
    name: rootPackageJson.name,
    version: rootPackageJson.version,
    description:
      rootPackageJson.description || 'Qwen Code - AI-powered coding assistant',
    repository: rootPackageJson.repository,
    type: 'module',
    main: 'cli.js',
    bin: {
      qwen: 'cli.js',
    },
    files: [
      'cli.js',
      // Worker thread entry loaded by FzfWorkerHandle at runtime via
      // `resolveBundleDir(import.meta.url)` + `path.join(dir, 'fzfWorker.js')`.
      // Must ship in the tarball or the @-picker silently falls back to the
      // in-thread AsyncFzf path on big workspaces in npm-installed CLIs.
      'fzfWorker.js',
      'chunks',
      'vendor',
      '*.sb',
      'README.md',
      'LICENSE',
      'locales',
      'examples',
      'bundled',
    ],
    config: rootPackageJson.config,
    dependencies: {},
    optionalDependencies: {
      '@lydell/node-pty': '1.2.0-beta.10',
      '@lydell/node-pty-darwin-arm64': '1.2.0-beta.10',
      '@lydell/node-pty-darwin-x64': '1.2.0-beta.10',
      '@lydell/node-pty-linux-x64': '1.2.0-beta.10',
      '@lydell/node-pty-win32-arm64': '1.2.0-beta.10',
      '@lydell/node-pty-win32-x64': '1.2.0-beta.10',
      '@teddyzhu/clipboard': '0.0.5',
      '@teddyzhu/clipboard-darwin-arm64': '0.0.5',
      '@teddyzhu/clipboard-darwin-x64': '0.0.5',
      '@teddyzhu/clipboard-linux-x64-gnu': '0.0.5',
      '@teddyzhu/clipboard-linux-arm64-gnu': '0.0.5',
      '@teddyzhu/clipboard-win32-x64-msvc': '0.0.5',
      '@teddyzhu/clipboard-win32-arm64-msvc': '0.0.5',
    },
    engines: rootPackageJson.engines,
  };

  fs.writeFileSync(
    path.join(distDir, 'package.json'),
    JSON.stringify(distPackageJson, null, 2) + '\n',
  );
}

function printPackageStructure(distDir) {
  console.log('\n✅ Package prepared for publishing at dist/');
  console.log('\nPackage structure:');
  // Use Node.js to list directory contents (cross-platform)
  const distFiles = fs.readdirSync(distDir);
  for (const file of distFiles) {
    const filePath = path.join(distDir, file);
    const stats = fs.statSync(filePath);
    const size = stats.isDirectory() ? '<DIR>' : formatBytes(stats.size);
    console.log(`  ${size.padEnd(12)} ${file}`);
  }
}

function copyRecursiveSync(src, dest) {
  const stats = fs.statSync(src);
  if (stats.isDirectory()) {
    if (!fs.existsSync(dest)) {
      fs.mkdirSync(dest, { recursive: true });
    }
    const entries = fs.readdirSync(src);
    for (const entry of entries) {
      const srcPath = path.join(src, entry);
      const destPath = path.join(dest, entry);
      copyRecursiveSync(srcPath, destPath);
    }
  } else {
    fs.copyFileSync(src, dest);
  }
}

function formatBytes(bytes) {
  if (bytes < 1024) return `${bytes}B`;
  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)}KB`;
  return `${(bytes / (1024 * 1024)).toFixed(1)}MB`;
}