#!/usr/bin/env node
/**
 * Pre-commit type check for staged TS files.
 *
 * Writes a temp tsconfig that extends the project root and pins
 * `files` to whatever lint-staged passed in. `tsc -p` then compiles
 * the whole dep graph from those entrypoints — catches errors in
 * the staged code AND in anything it imports — while still skipping
 * the 22s full-project pass.
 *
 * Replaces `tsc-files` (npm), which silently fails under pnpm because
 * its tsc-resolution path (typescript/../.bin/tsc) doesn't exist in
 * pnpm's virtual store layout.
 */

import { spawnSync } from 'node:child_process';
import { mkdtempSync, rmSync, writeFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join, relative, resolve } from 'node:path';

const cwd = process.cwd();
const args = process.argv.slice(2);
const files = args.filter((a) => /\.(ts|tsx)$/.test(a));

if (files.length === 0) {
  process.exit(0);
}

const tmpDir = mkdtempSync(join(tmpdir(), 'tsc-staged-'));
const tmpConfig = join(tmpDir, 'tsconfig.json');

const relFiles = files.map((f) => relative(tmpDir, resolve(cwd, f)));

writeFileSync(
  tmpConfig,
  JSON.stringify(
    {
      extends: relative(tmpDir, join(cwd, 'tsconfig.json')),
      compilerOptions: { noEmit: true, skipLibCheck: true },
      files: relFiles,
      include: [],
    },
    null,
    2,
  ),
);

const tsc = spawnSync('pnpm', ['exec', 'tsc', '-p', tmpConfig, '--pretty'], {
  cwd,
  stdio: 'inherit',
});

rmSync(tmpDir, { recursive: true, force: true });

process.exit(tsc.status ?? 1);