import { test, afterEach } from 'node:test'
import assert from 'node:assert/strict'
import {
  separator,
  section,
  info,
  success,
  warn,
  fail,
  failError,
} from '../logger.js'

const realWrite = process.stderr.write
const realStdoutWrite = process.stdout.write

afterEach(() => {
  process.stderr.write = realWrite
  process.stdout.write = realStdoutWrite
})

// 攔截寫入 stdout 的內容
function captureStdout(fn) {
  const chunks = []
  process.stdout.write = (chunk) => {
    chunks.push(String(chunk))
    return true
  }
  try {
    fn()
  } finally {
    process.stdout.write = realStdoutWrite
  }
  return chunks.join('')
}

test('info/success/warn 以正確前綴寫入 stdout', () => {
  assert.equal(captureStdout(() => info('hi')), '[INFO] hi\n')
  assert.equal(captureStdout(() => success('ok')), '[OK]   ok\n')
  assert.equal(captureStdout(() => warn('careful')), '[WARN] careful\n')
})

test('separator 輸出等號分隔線', () => {
  const out = captureStdout(() => separator())
  assert.match(out, /^\n={50}\n$/)
})

test('section 輸出分隔線、標題與虛線', () => {
  const out = captureStdout(() => section('參數檢查'))
  assert.match(out, /={50}\n參數檢查\n-{50}\n/)
})

test('fail 寫入 stderr 而非 stdout', () => {
  const stdout = captureStdout(() => {
    const chunks = []
    process.stderr.write = (chunk) => {
      chunks.push(String(chunk))
      return true
    }
    fail('boom')
    assert.equal(chunks.join(''), '[ERR]  boom\n')
  })
  assert.equal(stdout, '') // fail 不應寫入 stdout
})

// 攔截寫入 stderr 的內容
function captureStderr(fn) {
  const chunks = []
  process.stderr.write = (chunk) => {
    chunks.push(String(chunk))
    return true
  }
  try {
    fn()
  } finally {
    process.stderr.write = realWrite
  }
  return chunks.join('')
}

test('failError 對 Error 物件輸出名稱、訊息與堆疊', () => {
  const out = captureStderr(() => failError(new TypeError('boom')))
  assert.match(out, /\[ERR\]  TypeError: boom/)
  assert.match(out, /at /) // 堆疊內容
})

test('failError 對非 Error 值輸出其字串形式', () => {
  const out = captureStderr(() => failError('plain failure'))
  assert.match(out, /\[ERR\]  plain failure/)
})