import assert from 'node:assert/strict'
import path from 'node:path'
import test from 'node:test'

import { resolvePythonExecutable, runPythonCommand } from '../scripts/python-runtime.mjs'

test('显式 PYTHON 配置优先于所有自动发现路径', () => {
  const selected = resolvePythonExecutable({
    pipelineDirectory: 'C:\\repo\\design-pipeline',
    environment: {
      PYTHON: 'D:\\tools\\python.exe',
      LOCALAPPDATA: 'C:\\Users\\tester\\AppData\\Local',
    },
    platform: 'win32',
    pathExists: () => true,
    canRun: candidate => candidate === 'D:\\tools\\python.exe',
  })

  assert.equal(selected, 'D:\\tools\\python.exe')
})

test('Windows 环境在虚拟环境缺失时选择 Python Manager 的真实入口', () => {
  const managerPython = path.win32.join(
    'C:\\Users\\tester\\AppData\\Local',
    'Python',
    'bin',
    'python.exe',
  )
  const selected = resolvePythonExecutable({
    pipelineDirectory: 'C:\\repo\\design-pipeline',
    environment: { LOCALAPPDATA: 'C:\\Users\\tester\\AppData\\Local' },
    platform: 'win32',
    pathExists: candidate => candidate === managerPython,
    canRun: candidate => candidate === managerPython,
  })

  assert.equal(selected, managerPython)
})

test('所有候选解释器均不可用时给出可执行的中文修复指引', () => {
  assert.throws(
    () => resolvePythonExecutable({
      pipelineDirectory: 'C:\\repo\\design-pipeline',
      environment: {},
      platform: 'win32',
      pathExists: () => false,
      canRun: () => false,
    }),
    /未找到可用的 Python.*PYTHON.*\.venv/s,
  )
})

test('统一执行器始终把禁止字节码缓存参数放在首位', () => {
  let invocation
  runPythonCommand({
    executable: 'python-test',
    args: ['script.py', '--flag'],
    cwd: 'C:\\repo',
    spawn: (command, args, options) => {
      invocation = { command, args, options }
      return { status: 0 }
    },
  })

  assert.equal(invocation.command, 'python-test')
  assert.deepEqual(invocation.args, ['-B', 'script.py', '--flag'])
  assert.equal(invocation.options.cwd, 'C:\\repo')
})