import { test } from 'node:test'
import assert from 'node:assert/strict'
import { useTaskProgressLoop } from '../src/shared/composables/useTaskProgressLoop.ts'

function setupWindow() {
  const storage = new Map<string, string>()
  ;(globalThis as Record<string, unknown>).window = {
    localStorage: {
      getItem: (k: string) => storage.get(k) ?? null,
      setItem: (k: string, v: string) => { storage.set(k, v) },
      removeItem: (k: string) => { storage.delete(k) },
    },
    setTimeout: (fn: () => void, ms: number) => globalThis.setTimeout(fn, ms),
    clearTimeout: (id: unknown) => globalThis.clearTimeout(id as number),
    setInterval: (fn: () => void, ms: number) => globalThis.setInterval(fn, ms),
    clearInterval: (id: unknown) => globalThis.clearInterval(id as number),
  }
}

let scopeCounter = 0

function httpError(status: number, data?: unknown): Error {
  const err = new Error(`Request failed with status code ${status}`) as Error & {
    isAxiosError?: boolean
    response?: { status: number; data?: unknown }
  }
  err.isAxiosError = true
  err.response = { status, data }
  return err
}

interface Harness {
  loop: ReturnType<typeof useTaskProgressLoop<{ taskId?: number; status?: string }>>
  terminalCalls: Array<{ taskId: number; status: string }>
  errorCalls: unknown[]
}

async function makeLoop(impl: () => Promise<{ items: unknown[] }>): Promise<Harness> {
  const terminalCalls: Array<{ taskId: number; status: string }> = []
  const errorCalls: unknown[] = []
  const loop = useTaskProgressLoop<{ taskId?: number; status?: string }>({
    scope: `http-err-${scopeCounter++}`,
    fetchProgress: async () => impl(),
    extractTaskId: (d) => d?.taskId,
    extractStatus: (d) => d?.status,
    getIntervalMs: () => 60000,
    onTerminal: (taskId, _d, status) => { terminalCalls.push({ taskId, status }) },
    onError: (e) => { errorCalls.push(e) },
  })
  loop.reset([1])
  await new Promise<void>((r) => globalThis.setTimeout(r, 0))
  return { loop, terminalCalls, errorCalls }
}

test('test_4xx_on_error', async () => {
  setupWindow()
  const h = await makeLoop(async () => { throw httpError(404) })
  await h.loop.refreshOnce()
  assert.equal(h.errorCalls.length, 2, '4xx 记 onError')
  h.loop.dispose()
})

test('test_5xx_on_error', async () => {
  setupWindow()
  const h = await makeLoop(async () => { throw httpError(500) })
  await h.loop.refreshOnce()
  assert.equal(h.errorCalls.length, 2, '5xx 记 onError')
  h.loop.dispose()
})

test('test_5xx_no_terminal_failed', async () => {
  setupWindow()
  const h = await makeLoop(async () => { throw httpError(503, { message: 'upstream down' }) })
  await h.loop.refreshOnce()
  assert.equal(h.terminalCalls.length, 0, '5xx 且无法解析明细时不误判 FAILED')
  h.loop.dispose()
})

test('test_5xx_backoff', async () => {
  setupWindow()
  const h = await makeLoop(async () => { throw httpError(500) })
  const before = h.errorCalls.length
  await new Promise<void>((r) => globalThis.setTimeout(r, 50))
  assert.equal(h.errorCalls.length, before, '5xx 后不立即自动重试（退避）')
  h.loop.dispose()
})

test('test_5xx_unknown_status_untouched', async () => {
  setupWindow()
  let fail = true
  const h = await makeLoop(async () => {
    if (fail) throw httpError(500)
    return { items: [{ taskId: 1, status: 'WEIRD_STATE' }] }
  })
  fail = false
  await h.loop.refreshOnce()
  assert.equal(h.loop.taskStatuses.value[1], 'WEIRD_STATE', '恢复后未知状态照常落地')
  assert.equal(h.terminalCalls.length, 0, '未知状态不触发终态')
  h.loop.dispose()
})

test('test_4xx_recovery', async () => {
  setupWindow()
  let fail = true
  const h = await makeLoop(async () => {
    if (fail) throw httpError(400)
    return { items: [{ taskId: 1, status: 'RUNNING' }] }
  })
  await h.loop.refreshOnce()
  fail = false
  await h.loop.refreshOnce()
  assert.equal(h.loop.taskStatuses.value[1], 'RUNNING', '4xx 后恢复继续轮询')
  h.loop.dispose()
})

test('test_status_500_partial_items', async () => {
  setupWindow()
  let fail = true
  const h = await makeLoop(async () => {
    if (fail) throw httpError(500)
    return { items: [{ taskId: 1, status: 'SUCCESS' }, { taskId: 2, status: 'RUNNING' }] }
  })
  fail = false
  await h.loop.refreshOnce()
  assert.equal(h.terminalCalls.length, 1, '5xx 恢复后部分 items 仍处理')
  assert.equal(h.terminalCalls[0].taskId, 1)
  assert.equal(h.loop.taskStatuses.value[2], 'RUNNING')
  h.loop.dispose()
})

test('test_5xx_no_status_wipe', async () => {
  setupWindow()
  const h = await makeLoop(async () => { throw httpError(500) })
  // 先正常落地一个状态，再出现 5xx
  const loop2 = h.loop
  const original = loop2.taskStatuses
  original.value = { 1: 'RUNNING' }
  await loop2.refreshOnce()
  assert.equal(loop2.taskStatuses.value[1], 'RUNNING', '5xx 不清空已有状态')
  loop2.dispose()
})