import { describe,it,expect } from 'vitest';
import path from 'node:path';
import { resolvePython,describeSpawnError } from './python-runtime';

const root='/repo',venv=path.join(root,'pierzainer_ground','.venv');
const has=(...files:string[])=>(file:string)=>files.includes(file);

describe('resolvePython',()=>{
 it('uses the Windows venv on win32',()=>{
  const exe=path.join(venv,'Scripts','python.exe');
  expect(resolvePython(root,'win32',has(exe),{})).toBe(exe);
 });
 it('uses the POSIX venv on Linux/WSL',()=>{
  const bin=path.join(venv,'bin','python');
  expect(resolvePython(root,'linux',has(bin),{})).toBe(bin);
 });
 it('falls back to PIERZAINER_PYTHON, then python3 / python',()=>{
  expect(resolvePython(root,'linux',has(),{PIERZAINER_PYTHON:'/opt/py'})).toBe('/opt/py');
  expect(resolvePython(root,'linux',has(),{})).toBe('python3');
  expect(resolvePython(root,'win32',has(),{})).toBe('python');
 });
 it('explains ENOENT instead of the raw spawn message',()=>{
  const error=Object.assign(new Error('spawn python ENOENT'),{code:'ENOENT'});
  expect(describeSpawnError(error,'python')).toContain('Python 실행 파일을 찾지 못했습니다');
 });
});