import { test } from 'node:test'
import assert from 'node:assert/strict'
import {
  TASK_POLL_BACKOFF_MAX_MS,
  TASK_POLL_BACKOFF_FACTOR,
  getTaskPollBackoffMaxMs,
  getTaskPollBackoffFactor,
  configureTaskPolling,
  resetTaskPollingConfig,
} from '../src/shared/task-progress-config.ts'

test('test_backoff_max_default', () => {
  resetTaskPollingConfig()
  assert.equal(getTaskPollBackoffMaxMs(), 10000)
  assert.equal(getTaskPollBackoffMaxMs(), TASK_POLL_BACKOFF_MAX_MS)
})

test('test_backoff_factor_default', () => {
  resetTaskPollingConfig()
  assert.equal(getTaskPollBackoffFactor(), 2)
  assert.equal(getTaskPollBackoffFactor(), TASK_POLL_BACKOFF_FACTOR)
})

test('test_backoff_max_override', () => {
  resetTaskPollingConfig()
  configureTaskPolling({ backoffMaxMs: 8000 })
  assert.equal(getTaskPollBackoffMaxMs(), 8000)
  resetTaskPollingConfig()
  assert.equal(getTaskPollBackoffMaxMs(), 10000, 'reset 后恢复默认')
})

test('test_backoff_max_positive', () => {
  resetTaskPollingConfig()
  assert.throws(() => configureTaskPolling({ backoffMaxMs: 0 }), /退避上限必须为正数/)
  assert.throws(() => configureTaskPolling({ backoffMaxMs: -100 }), /退避上限必须为正数/)
  // 拒绝后 getter 仍返回正值，非正配置不可观察
  assert.ok(getTaskPollBackoffMaxMs() > 0)
  assert.equal(getTaskPollBackoffMaxMs(), TASK_POLL_BACKOFF_MAX_MS)
})

test('test_backoff_factor_min_one', () => {
  resetTaskPollingConfig()
  // factor <1 钳制为 1（不抛错）
  configureTaskPolling({ backoffFactor: 0.5 })
  assert.equal(getTaskPollBackoffFactor(), 1)
  configureTaskPolling({ backoffFactor: 0 })
  assert.equal(getTaskPollBackoffFactor(), 1)
  resetTaskPollingConfig()
  assert.equal(getTaskPollBackoffFactor(), 2)
})

test('test_backoff_config_isolated', () => {
  resetTaskPollingConfig()
  configureTaskPolling({ backoffMaxMs: 7000, backoffFactor: 3 })
  assert.equal(getTaskPollBackoffMaxMs(), 7000)
  assert.equal(getTaskPollBackoffFactor(), 3)
  resetTaskPollingConfig()
  assert.equal(getTaskPollBackoffMaxMs(), 10000, '不串到其他用例')
  assert.equal(getTaskPollBackoffFactor(), 2)
})

test('test_backoff_max_freeze', () => {
  resetTaskPollingConfig()
  assert.equal(TASK_POLL_BACKOFF_MAX_MS, 10000, '默认值快照')
  assert.equal(getTaskPollBackoffMaxMs(), TASK_POLL_BACKOFF_MAX_MS)
})

test('test_backoff_factor_freeze', () => {
  resetTaskPollingConfig()
  assert.equal(TASK_POLL_BACKOFF_FACTOR, 2, 'factor 快照')
  assert.equal(getTaskPollBackoffFactor(), TASK_POLL_BACKOFF_FACTOR)
})