import { test } from 'node:test'
import assert from 'node:assert/strict'
import { loadConfig } from '../config.js'

const base = {
  GITEA_SERVER_URL: 'https://gitea.example.com',
  GITEA_REPOSITORY: 'owner/repo',
  KEEP_COUNT: '2',
}

test('loadConfig 在缺少 GITEA_SERVER_URL 時丟出', () => {
  assert.throws(
    () => loadConfig({ GITEA_REPOSITORY: 'owner/repo', KEEP_COUNT: '2' }),
    /GITEA_SERVER_URL is required/,
  )
})

test('loadConfig 在 KEEP_COUNT 非整數時丟出', () => {
  assert.throws(
    () => loadConfig({ ...base, KEEP_COUNT: 'abc' }),
    /non-negative integer/,
  )
})

test('loadConfig 在 GITEA_SERVER_URL 非合法 URL 時丟出', () => {
  assert.throws(
    () => loadConfig({ ...base, GITEA_SERVER_URL: 'not a url' }),
    /must be a valid URL/,
  )
})

test('loadConfig 在 GITEA_REPOSITORY 含路徑穿越時丟出', () => {
  assert.throws(
    () => loadConfig({ ...base, GITEA_REPOSITORY: '../evil' }),
    /owner\/repo without path traversal/,
  )
})

test('loadConfig 在有效輸入時回傳完整設定物件', () => {
  const cfg = loadConfig(base)
  assert.equal(cfg.serverUrl, 'https://gitea.example.com')
  assert.equal(cfg.repository, 'owner/repo')
  assert.equal(cfg.token, null)
  assert.equal(cfg.keepCount, 2)
  assert.equal(
    cfg.releaseApiUrl,
    'https://gitea.example.com/api/v1/repos/owner/repo/releases',
  )
  assert.equal(
    cfg.tagApiUrl,
    'https://gitea.example.com/api/v1/repos/owner/repo/tags',
  )
})

test('loadConfig 去除 GITEA_SERVER_URL 結尾斜線,避免 API 路徑出現雙斜線', () => {
  const cfg = loadConfig({ ...base, GITEA_SERVER_URL: 'https://gitea.example.com/' })
  assert.equal(cfg.serverUrl, 'https://gitea.example.com')
  assert.equal(
    cfg.releaseApiUrl,
    'https://gitea.example.com/api/v1/repos/owner/repo/releases',
  )
})

test('loadConfig 在提供 token 時保留 token 值', () => {
  const cfg = loadConfig({ ...base, GITEA_TOKEN: 'secret' })
  assert.equal(cfg.token, 'secret')
})

test('loadConfig 在 GITEA_TOKEN 為空字串時視為匿名(token 為 null)', () => {
  const cfg = loadConfig({ ...base, GITEA_TOKEN: '' })
  assert.equal(cfg.token, null)
})

test('loadConfig 接受極短與極長的 GITEA_TOKEN', () => {
  const short = loadConfig({ ...base, GITEA_TOKEN: 'x' })
  assert.equal(short.token, 'x')

  const longToken = 'a'.repeat(1000)
  const long = loadConfig({ ...base, GITEA_TOKEN: longToken })
  assert.equal(long.token, longToken)
})