import { test, afterEach } from 'node:test'
import assert from 'node:assert/strict'
import { spawnSync } from 'node:child_process'
import { fileURLToPath } from 'node:url'
import { main } from '../index.js'

const realFetch = globalThis.fetch
const savedEnv = { ...process.env }

afterEach(() => {
  globalThis.fetch = realFetch
  process.env = { ...savedEnv }
})

function setEnv(env) {
  for (const key of ['GITEA_SERVER_URL', 'GITEA_REPOSITORY', 'KEEP_COUNT', 'GITEA_TOKEN']) {
    delete process.env[key]
  }
  Object.assign(process.env, env)
}

test('main 在環境變數有效且 API 正常時順利完成', async () => {
  setEnv({
    GITEA_SERVER_URL: 'https://gitea.example.com',
    GITEA_REPOSITORY: 'owner/repo',
    KEEP_COUNT: '2',
  })
  // 所有清單端點皆回空陣列(無 release、無 tag)
  globalThis.fetch = async () => ({
    ok: true,
    status: 200,
    headers: { get: () => 'application/json' },
    json: async () => [],
  })

  await main() // 不應拋出
})

test('main 在必填環境變數缺失時 reject(供整合層級驗證錯誤處理)', async () => {
  setEnv({
    GITEA_REPOSITORY: 'owner/repo',
    KEEP_COUNT: '2',
  })
  await assert.rejects(() => main(), /GITEA_SERVER_URL is required/)
})

test('直接執行 index.js 在設定錯誤時以非零狀態碼結束', () => {
  const indexPath = fileURLToPath(new URL('../index.js', import.meta.url))
  // 僅帶 PATH,不提供任何必填環境變數,使 main 拋錯並觸發 process.exit(1)
  const result = spawnSync(process.execPath, [indexPath], {
    env: { PATH: process.env.PATH },
    encoding: 'utf8',
  })
  assert.equal(result.status, 1)
  assert.match(result.stderr, /GITEA_SERVER_URL is required/)
})