import { existsSync, readdirSync, rmSync } from 'node:fs';
import { homedir } from 'node:os';
import { join } from 'node:path';

function fsPath(filePath: string): string {
  if (process.platform !== 'win32') return filePath;
  if (!filePath) return filePath;
  if (filePath.startsWith('\\\\?\\')) return filePath;
  return `\\\\?\\${filePath.replace(/\//g, '\\')}`;
}

function removeClipboardPackagesFromScope(scopeDir: string): number {
  if (!existsSync(fsPath(scopeDir))) return 0;

  let removed = 0;
  let entries: string[] = [];
  try {
    entries = readdirSync(fsPath(scopeDir));
  } catch {
    return 0;
  }

  for (const entry of entries) {
    if (entry !== 'clipboard' && !entry.startsWith('clipboard-')) continue;
    try {
      rmSync(fsPath(join(scopeDir, entry)), { recursive: true, force: true });
      removed += 1;
    } catch {
      // Best-effort cleanup only.
    }
  }

  return removed;
}

function cleanupNodeModules(nodeModulesDir: string): number {
  return removeClipboardPackagesFromScope(join(nodeModulesDir, '@mariozechner'));
}

function cleanupNodeModulesChildren(rootDir: string): number {
  if (!existsSync(fsPath(rootDir))) return 0;

  let removed = 0;
  let entries: Array<{ name: string; isDirectory: () => boolean }> = [];
  try {
    entries = readdirSync(fsPath(rootDir), { withFileTypes: true }) as typeof entries;
  } catch {
    return 0;
  }

  for (const entry of entries) {
    if (!entry.isDirectory()) continue;
    removed += cleanupNodeModules(join(rootDir, entry.name, 'node_modules'));
  }

  return removed;
}

export function cleanupOpenClawRuntimeNativeClipboard(openclawDir: string): number {
  return cleanupNodeModules(join(openclawDir, 'node_modules'));
}

export function cleanupOpenClawUserNativeClipboard(): number {
  const openclawHome = join(homedir(), '.openclaw');
  let removed = 0;

  removed += cleanupNodeModules(join(openclawHome, 'runtime', 'openclaw', 'node_modules'));
  removed += cleanupNodeModules(join(openclawHome, 'npm', 'node_modules'));
  removed += cleanupNodeModules(join(openclawHome, 'node_modules'));
  removed += cleanupNodeModulesChildren(join(openclawHome, 'extensions'));
  removed += cleanupNodeModulesChildren(join(openclawHome, 'plugin-runtime-deps'));

  return removed;
}