/**
 * 提交按钮防连点（shared/utils/submit-guard）行为测试。
 *
 * 背景（2026-09-17 上架事故）：前端「开始上架 / 启动任务」按钮在提交完成后立刻
 * 恢复可点，手快连点会重复创建任务；同一店铺并存多个任务后，客户端并发打开
 * 同一店铺时全部失败。这里把冷却逻辑抽成纯函数以便单测。
 */

import { test } from 'node:test'
import assert from 'node:assert/strict'
import {
  createClickGate,
  installSubmitGuard,
  DEFAULT_SUBMIT_COOLDOWN_MS,
  SUBMIT_BUTTON_SELECTOR,
} from '../src/shared/utils/submit-guard.ts'

function fakeClock(start = 1_000) {
  let current = start
  return {
    now: () => current,
    advance: (ms: number) => {
      current += ms
    },
  }
}

test('默认冷却时长是正数秒级', () => {
  assert.ok(DEFAULT_SUBMIT_COOLDOWN_MS >= 1000, '冷却至少 1 秒，否则挡不住连点')
})

test('默认选择器覆盖各工具页的主按钮', () => {
  assert.equal(SUBMIT_BUTTON_SELECTOR, '.btn-run')
})

test('首次点击放行', () => {
  const clock = fakeClock()
  const gate = createClickGate(1500, clock.now)
  assert.equal(gate.shouldBlock({}), false)
})

test('冷却期内重复点击被拦截', () => {
  const clock = fakeClock()
  const gate = createClickGate(1500, clock.now)
  const button = {}

  assert.equal(gate.shouldBlock(button), false)
  clock.advance(100)
  assert.equal(gate.shouldBlock(button), true)
  clock.advance(1399)
  assert.equal(gate.shouldBlock(button), true)
})

test('冷却结束时（边界）放行', () => {
  const clock = fakeClock()
  const gate = createClickGate(1500, clock.now)
  const button = {}

  assert.equal(gate.shouldBlock(button), false)
  clock.advance(1500)
  assert.equal(gate.shouldBlock(button), false, '恰好到达冷却终点应放行')
})

test('不同按钮互不影响', () => {
  const clock = fakeClock()
  const gate = createClickGate(1500, clock.now)
  const startButton = {}
  const matchButton = {}

  assert.equal(gate.shouldBlock(startButton), false)
  assert.equal(gate.shouldBlock(matchButton), false, '另一个按钮不该被前一个的冷却波及')
  clock.advance(100)
  assert.equal(gate.shouldBlock(startButton), true)
})

test('自定义冷却时长生效', () => {
  const clock = fakeClock()
  const gate = createClickGate(300, clock.now)
  const button = {}

  assert.equal(gate.shouldBlock(button), false)
  clock.advance(299)
  assert.equal(gate.shouldBlock(button), true)
  clock.advance(2)
  assert.equal(gate.shouldBlock(button), false)
})

test('被拦截的点击不会延长冷却', () => {
  const clock = fakeClock()
  const gate = createClickGate(1000, clock.now)
  const button = {}

  assert.equal(gate.shouldBlock(button), false)
  for (let i = 0; i < 5; i += 1) {
    clock.advance(100)
    assert.equal(gate.shouldBlock(button), true)
  }
  // 从首次点击起算 1000ms 后就该放行，而不是被连点拖长
  clock.advance(500)
  assert.equal(gate.shouldBlock(button), false)
})

test('同一时刻的两次点击只有第一次放行', () => {
  const clock = fakeClock()
  const gate = createClickGate(1500, clock.now)
  const button = {}

  assert.equal(gate.shouldBlock(button), false)
  assert.equal(gate.shouldBlock(button), true, '同一 tick 的第二次点击必须被拦')
})

test('reset 后立即放行', () => {
  const clock = fakeClock()
  const gate = createClickGate(1500, clock.now)
  const button = {}

  assert.equal(gate.shouldBlock(button), false)
  assert.equal(gate.shouldBlock(button), true)
  gate.reset(button)
  assert.equal(gate.shouldBlock(button), false)
})

test('非法冷却时长回落到默认值', () => {
  const clock = fakeClock()
  const gate = createClickGate(Number.NaN, clock.now)
  const button = {}

  assert.equal(gate.shouldBlock(button), false)
  clock.advance(DEFAULT_SUBMIT_COOLDOWN_MS - 1)
  assert.equal(gate.shouldBlock(button), true, 'NaN 应回落为默认冷却而不是立刻放行')
})

test('全局安装：捕获阶段注册且可卸载', () => {
  const registered: Array<{ type: string; handler: unknown; capture: boolean }> = []
  const removed: string[] = []
  const originalDocument = (globalThis as Record<string, unknown>).document
  ;(globalThis as Record<string, unknown>).document = {
    addEventListener: (type: string, handler: unknown, capture: boolean) => {
      registered.push({ type, handler, capture })
    },
    removeEventListener: (type: string) => {
      removed.push(type)
    },
  }

  try {
    const uninstall = installSubmitGuard({ cooldownMs: 1000, now: () => 0 })
    assert.equal(registered.length, 1)
    assert.equal(registered[0].type, 'click')
    assert.equal(registered[0].capture, true, '必须捕获阶段，否则 Vue 的 @click 已先执行')
    uninstall()
    assert.deepEqual(removed, ['click'])
  } finally {
    ;(globalThis as Record<string, unknown>).document = originalDocument
  }
})

test('全局安装：只拦 .btn-run 的连点，且第二次点击阻断冒泡', () => {
  const registered: Array<{ handler: (event: unknown) => void }> = []
  const originalDocument = (globalThis as Record<string, unknown>).document
  ;(globalThis as Record<string, unknown>).document = {
    addEventListener: (_type: string, handler: (event: unknown) => void) => {
      registered.push({ handler })
    },
    removeEventListener: () => undefined,
  }

  try {
    installSubmitGuard({ cooldownMs: 1000, now: () => 5000 })
    const handler = registered[0].handler

    const button = { closest: (selector: string) => (selector === '.btn-run' ? button : null) }
    const elsewhere = { closest: () => null }
    const makeEvent = (target: unknown) => {
      const calls: string[] = []
      return {
        calls,
        target,
        stopImmediatePropagation: () => calls.push('stop'),
        preventDefault: () => calls.push('prevent'),
      }
    }

    const first = makeEvent(button)
    handler(first)
    assert.deepEqual(first.calls, [], '首次点击不应被拦')

    const second = makeEvent(button)
    handler(second)
    assert.deepEqual(second.calls, ['stop', 'prevent'], '连点必须被拦下')

    const other = makeEvent(elsewhere)
    handler(other)
    assert.deepEqual(other.calls, [], '非提交按钮的点击不受影响')
  } finally {
    ;(globalThis as Record<string, unknown>).document = originalDocument
  }
})