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

import {
  CHUNK_RELOAD_GUARD_MS,
  isChunkLoadError,
  shouldAutoReloadChunkFailure,
} from '../src/utils/chunk-load-error.ts'

function createStorage(initial: Record<string, string> = {}) {
  const values = new Map(Object.entries(initial))
  return {
    getItem(key: string) {
      return values.get(key) ?? null
    },
    setItem(key: string, value: string) {
      values.set(key, String(value))
    },
  }
}

test('识别浏览器动态 import 失败文案', () => {
  assert.equal(
    isChunkLoadError(
      new TypeError(
        'Failed to fetch dynamically imported module: https://worker.khhao.com/assets/WorkerConsignmentPage-abc.js',
      ),
    ),
    true,
  )
  assert.equal(isChunkLoadError(new Error('Importing a module script failed.')), true)
  assert.equal(isChunkLoadError(new Error('Load failed')), true)
  assert.equal(
    isChunkLoadError({ name: 'ChunkLoadError', message: 'Loading chunk 12 failed' }),
    true,
  )
})

test('不把普通业务错误当成分片失败', () => {
  assert.equal(isChunkLoadError(new Error('接口请求失败')), false)
  assert.equal(isChunkLoadError(null), false)
  assert.equal(isChunkLoadError(undefined), false)
})

test('首次分片失败允许自动刷新，窗口内再次失败不再刷新', () => {
  const storage = createStorage()
  const now = 1_700_000_000_000
  assert.equal(shouldAutoReloadChunkFailure(storage, now), true)
  assert.equal(shouldAutoReloadChunkFailure(storage, now + 1_000), false)
  assert.equal(shouldAutoReloadChunkFailure(storage, now + CHUNK_RELOAD_GUARD_MS - 1), false)
})

test('超过防抖窗口后允许再次自动刷新', () => {
  const storage = createStorage()
  const now = 1_700_000_000_000
  assert.equal(shouldAutoReloadChunkFailure(storage, now), true)
  assert.equal(shouldAutoReloadChunkFailure(storage, now + CHUNK_RELOAD_GUARD_MS), true)
})

test('存储不可用时不做自动刷新，避免无限循环', () => {
  const storage = {
    getItem() {
      throw new Error('denied')
    },
    setItem() {
      throw new Error('denied')
    },
  }
  assert.equal(shouldAutoReloadChunkFailure(storage), false)
  assert.equal(shouldAutoReloadChunkFailure(null), false)
})