/**
 * T16 数据新鲜度与过期状态 纯逻辑检查（票 16）。
 *
 * 零依赖 node 断言脚本（仓库没配测试运行器，约定见 t01-panel-catalog.mjs）。
 * 运行：node .scratch/cockpit-shell-panel-layout/verify/t16-freshness.mjs
 *
 * 七段（每条对着票 16 的验收原句）：
 *   A 验收 1：显示最近一次成功更新时间（缺失显示占位符，**不是** 00:00:00）
 *   B 验收 2：新鲜 / 过期 / 不可用 / 部分失败**四态可区分**，文案各不相同
 *   C 验收 3：**连续两个**配置周期未成功更新 → 过期或不可用（连续，不是累计）
 *   D 验收 4：过期数据**保留**最后已知值并带过期标识（不伪装成实时）
 *   E 验收 5：缺失指标显示占位符，**不显示虚假零值**（0 是有效值，null 才是缺失）
 *   F 验收 6：刷新周期（前端轮询 + WS 断线也算失败周期）真的按周期跑、能停干净
 *   G 静态守卫：组件/store 不自己拼文案与色键；domain 纯函数；周期来自配置
 *
 * 口径来源（维护者 2026-09-24 定）：前端轮询 + WS 断线也算失败周期；
 * 「过期/不可用」复用票 05 的分区状态词汇；四态演示用注入式时钟 + mock 开关。
 */
import { readFileSync } from 'node:fs'
import { createPinia, setActivePinia } from 'pinia'
import {
    EXPIRED_AFTER_FAILURES,
    FRESHNESS_PLACEHOLDER,
    FRESHNESS_VIEW,
    clockText,
    emptyFreshness,
    freshnessOf,
    freshnessText,
    freshnessView,
    isRetained,
    markFailure,
    markSuccess,
    overallFreshness,
    overallFreshnessText,
    sectionStateOf,
    sectionStateOfFreshnessView,
    sinceSuccessText,
    toMillis,
    viewFromBackendFreshness,
    viewFromSectionState,
} from '../../../src/modules/cockpit/domain/freshnessModel.js'
import { EXPIRED_MISSED_CYCLES, FRESHNESS, dataAgeText, isExpired } from '../../../src/modules/cockpit/domain/freshness.js'
import {
    DEFAULT_REFRESH_SECONDS,
    getFreshnessState,
    isPolling,
    resetFreshness,
    runCycle,
    startPolling,
    stopPolling,
} from '../../../src/modules/cockpit/services/freshnessService.js'
import { useRuntimeStore } from '../../../src/modules/cockpit/stores/runtimeStore.js'
import { normalizeConfig } from '../../../src/modules/cockpit/services/cockpitConfig.js'

const checks = []
function check(name, pass, evidence) {
    checks.push({ name, pass })
    console.log(`${pass ? 'PASS' : 'FAIL'}  ${name}${evidence ? `  — ${evidence}` : ''}`)
}

const moduleRoot = new URL('../../../src/modules/cockpit/', import.meta.url)
const read = (relative) => readFileSync(new URL(relative, moduleRoot), 'utf8')
const code = (text) => text.replace(/\/\*[\s\S]*?\*\//g, '').replace(/(^|[^:])\/\/.*$/gm, '$1')
const readCode = (relative) => code(read(relative))
const codeVue = (text) => code(text.replace(/<!--[\s\S]*?-->/g, ''))
const readVueCode = (relative) => codeVue(read(relative))

setActivePinia(createPinia())

/** 假定时器：把「两个周期」变成同步可控，不真的等 60 秒。 */
function fakeTimers() {
    const tasks = []
    return {
        setTimeout: (fn, ms) => {
            const id = { fn, ms }
            tasks.push(id)
            return id
        },
        clearTimeout: (id) => {
            const index = tasks.indexOf(id)
            if (index >= 0) tasks.splice(index, 1)
        },
        async step() {
            const next = tasks.shift()
            if (!next) return false
            next.fn()
            await Promise.resolve()
            return true
        },
        pending: () => tasks.length,
    }
}

const T0 = Date.parse('2026-09-24T10:00:00+08:00')

// ================================================================ A 最近成功更新时间

{
    const fresh = markSuccess(emptyFreshness(), T0)
    const view = freshnessView(fresh, T0 + 5000)
    check(
        'A1-shows-last-success-clock',
        /^\d{2}:\d{2}:\d{2}$/.test(view.lastSuccessClock) && view.sinceSuccess === '5 秒前',
        `最近一次成功更新 ${view.lastSuccessClock}（${view.sinceSuccess}）`,
    )

    // 缺失必须是占位符，**不是** 00:00:00 —— 后者看起来像一个真实时刻。
    const none = freshnessView(emptyFreshness(), T0)
    check(
        'A2-missing-time-is-placeholder',
        none.lastSuccessClock === FRESHNESS_PLACEHOLDER &&
            none.sinceSuccess === FRESHNESS_PLACEHOLDER &&
            clockText(null) === FRESHNESS_PLACEHOLDER &&
            clockText('not-a-time') === FRESHNESS_PLACEHOLDER &&
            clockText('') === FRESHNESS_PLACEHOLDER,
        `没有成功过时显示「${none.lastSuccessClock}」（不编一个 00:00:00）`,
    )
    check(
        'A3-accepts-iso-and-epoch',
        clockText(T0) === clockText(new Date(T0).toISOString()) && toMillis('2026-09-24T10:00:00+08:00') === T0,
        '毫秒时间戳与 ISO 串（后端 updatedAt 的形状）都认，解析不出回 null',
    )
    check(
        'A4-age-text-scales',
        sinceSuccessText(markSuccess(emptyFreshness(), T0), T0 + 90_000) === '2 分钟前' &&
            sinceSuccessText(markSuccess(emptyFreshness(), T0), T0 + 7200_000) === '2 小时前',
        '「多久之前」随量级换单位（秒/分钟/小时）',
    )
}

// ================================================================ B 四态可区分

{
    const never = emptyFreshness()
    const current = markSuccess(never, T0)
    let stale = current
    stale = markFailure(stale, T0 + 1000, '取数失败')
    stale = markFailure(stale, T0 + 2000, '取数失败')
    let unavailable = never
    unavailable = markFailure(unavailable, T0 + 1000, '取数失败')

    const views = [freshnessOf(current), freshnessOf(stale), freshnessOf(unavailable), freshnessOf(never)]
    check(
        'B1-four-states-distinct',
        freshnessOf(current) === FRESHNESS_VIEW.CURRENT &&
            freshnessOf(stale) === FRESHNESS_VIEW.STALE &&
            freshnessOf(unavailable) === FRESHNESS_VIEW.UNAVAILABLE &&
            freshnessOf(never) === FRESHNESS_VIEW.EMPTY,
        `四态：${views.join(' / ')}（新鲜 / 过期 / 不可用 / 尚未取数）`,
    )

    const texts = views.map((view) => freshnessText(view))
    check(
        'B2-four-texts-distinct',
        new Set(texts).size === 4 && freshnessText(FRESHNESS_VIEW.STALE).includes('过期') && !freshnessText(FRESHNESS_VIEW.STALE).includes('不可用'),
        `四句文案互不相同，且过期与不可用**说得不一样**：${texts.join(' | ')}`,
    )
    check(
        'B3-partial-is-its-own-state',
        overallFreshness([FRESHNESS_VIEW.CURRENT, FRESHNESS_VIEW.UNAVAILABLE]) === 'partial' &&
            overallFreshness([FRESHNESS_VIEW.UNAVAILABLE, FRESHNESS_VIEW.UNAVAILABLE]) === FRESHNESS_VIEW.UNAVAILABLE &&
            /部分/.test(overallFreshnessText('partial')),
        `部分失败是独立状态：「${overallFreshnessText('partial')}」（一对一全坏才算整体不可用）`,
    )
    check(
        'B4-maps-to-section-vocabulary',
        sectionStateOfFreshnessView(FRESHNESS_VIEW.STALE) === 'stale' &&
            sectionStateOfFreshnessView(FRESHNESS_VIEW.UNAVAILABLE) === 'unavailable' &&
            sectionStateOfFreshnessView(FRESHNESS_VIEW.CURRENT) === 'success',
        '四态映射到票 05 的分区状态词汇（不新造第二套状态词）',
    )
    check(
        'B5-bridges-backend-conclusion',
        viewFromBackendFreshness(FRESHNESS.EXPIRED) === FRESHNESS_VIEW.STALE &&
            viewFromBackendFreshness(FRESHNESS.EMPTY) === FRESHNESS_VIEW.EMPTY &&
            viewFromBackendFreshness('WHATEVER') === '',
        '后端给了结论时能桥接过来（认不出的回空串，不猜）',
    )
}

// ================================================================ C 连续两个周期

{
    check('C1-two-cycles-is-the-bar', EXPIRED_AFTER_FAILURES === 2 && EXPIRED_MISSED_CYCLES === 2, `判定阈值 = ${EXPIRED_AFTER_FAILURES}（与票 05 的 EXPIRED_MISSED_CYCLES 一致）`)

    // 一个周期失败：还不算过期（这正是"连续两个"的意思）。
    let state = markSuccess(emptyFreshness(), T0)
    state = markFailure(state, T0 + 1000)
    check(
        'C2-one-failure-not-yet-stale',
        freshnessOf(state) === FRESHNESS_VIEW.CURRENT && state.consecutiveFailures === 1,
        `第 1 个周期失败：连续失败 ${state.consecutiveFailures}，仍是「${freshnessText(freshnessOf(state))}」`,
    )

    // 第二个周期失败：过期。
    state = markFailure(state, T0 + 2000)
    check(
        'C3-two-consecutive-failures-stale',
        freshnessOf(state) === FRESHNESS_VIEW.STALE,
        `第 2 个周期失败：连续失败 ${state.consecutiveFailures} → 「${freshnessText(freshnessOf(state))}」`,
    )

    // **连续性**是关键：中间成功一次就清零，不能累计。
    let resumed = markFailure(markSuccess(emptyFreshness(), T0), T0 + 1000)
    resumed = markSuccess(resumed, T0 + 2000)
    resumed = markFailure(resumed, T0 + 3000)
    check(
        'C4-success-resets-streak',
        freshnessOf(resumed) === FRESHNESS_VIEW.CURRENT && resumed.consecutiveFailures === 1,
        `失败→成功→失败：连续失败回到 ${resumed.consecutiveFailures}（不是累计 2），仍是「${freshnessText(freshnessOf(resumed))}」`,
    )

    // 从未成功过 + 两个周期失败 → 不可用（没有旧值可留，与过期分开）。
    let never = emptyFreshness()
    never = markFailure(never, T0 + 1000)
    never = markFailure(never, T0 + 2000)
    check(
        'C5-never-succeeded-is-unavailable',
        freshnessOf(never) === FRESHNESS_VIEW.UNAVAILABLE,
        `从未取到值又连续失败 ${never.consecutiveFailures} 次 → 「${freshnessText(freshnessOf(never))}」（与"过期"分开：没有旧值可留）`,
    )
}

// ================================================================ D 过期保留旧值

{
    const succeeded = markSuccess(emptyFreshness(), T0)
    let stale = markFailure(markFailure(succeeded, T0 + 1000), T0 + 2000)
    check(
        'D1-stale-keeps-last-success',
        stale.lastSuccessAt === T0 && isRetained(stale) === true,
        `过期后 lastSuccessAt 仍是第一次成功那一刻（${clockText(stale.lastSuccessAt)}）—— 保留最后已知值，界面上带过期标识`,
    )
    check(
        'D2-failure-does-not-erase-success-time',
        markFailure(succeeded, T0 + 1000).lastSuccessAt === T0 && stale.successes === 1,
        '失败**不覆盖**"最后一次成功是什么时候"（否则值班人员就查不到旧值有多旧）',
    )
    check(
        'D3-retained-only-for-stale',
        isRetained(succeeded) === false && isRetained(emptyFreshness()) === false,
        '只有「过期」带保留标识；新鲜与尚未取数都不带',
    )
    check(
        'D4-view-carries-retained-flag',
        freshnessView(stale, T0 + 3000).retained === true && freshnessView(stale, T0 + 3000).failures === 2,
        '视图对象把 retained / failures 一并交给界面（组件不自己算）',
    )
}

// ================================================================ E 不显示虚假零值

{
    const missing = { dataAgeSeconds: null, updatedAt: null }
    check(
        'E1-age-missing-is-placeholder',
        dataAgeText(missing) === '—' && dataAgeText({ dataAgeSeconds: undefined }) === '—',
        `年龄缺失显示「${dataAgeText(missing)}」，**不是**「0 秒前」（那会被读成刚更新过）`,
    )
    check(
        'E2-real-zero-is-valid',
        dataAgeText({ dataAgeSeconds: 0 }) === '0 秒前' && clockText(T0) !== FRESHNESS_PLACEHOLDER,
        `后端真给 0 是有效数据：${dataAgeText({ dataAgeSeconds: 0 })}（照实显示，不当缺失）`,
    )
    check(
        'E3-missed-cycles-drives-expiry',
        isExpired({ freshness: '', missedCycles: 2 }) === true &&
            isExpired({ freshness: '', missedCycles: 1 }) === false &&
            isExpired({ freshness: FRESHNESS.CURRENT, missedCycles: 5 }) === false,
        '后端只给 missedCycles 时按 >= 2 兜底；给了 freshness 结论则以它为准（前端不推翻后端）',
    )
    check(
        'E4-no-zero-fabrication-on-empty',
        freshnessView(emptyFreshness(), T0).lastSuccessAt === null,
        '从未成功时不编一个时间戳出来（字段保持 null，界面显示占位符）',
    )

    // 变异测试暴露的缺口：`sinceSuccessText` 的"缺失回占位符"此前没有断言，
    // 把占位符改成「0 秒前」时闸门仍全绿（假的通过）。这里补上，两个入口都要守。
    check(
        'E5-since-success-missing-is-placeholder',
        sinceSuccessText(emptyFreshness(), T0) === FRESHNESS_PLACEHOLDER &&
            sinceSuccessText({ lastSuccessAt: null }, T0) === FRESHNESS_PLACEHOLDER &&
            sinceSuccessText({ lastSuccessAt: 'garbage' }, T0) === FRESHNESS_PLACEHOLDER &&
            sinceSuccessText({ lastSuccessAt: T0 }, NaN) === FRESHNESS_PLACEHOLDER &&
            // 真给 0（刚刚更新）照实说 0 秒前，不混淆成缺失。
            sinceSuccessText({ lastSuccessAt: T0 }, T0) === '0 秒前',
        `两个年龄入口在缺失时都给「${FRESHNESS_PLACEHOLDER}」（不编「0 秒前」），而真的 0 秒照实显示`,
    )
}

// ================================================================ F 刷新周期（轮询）

{
    // 周期真的按配置跑；注入时钟让"两个周期"同步可测。
    resetFreshness()
    const timers = fakeTimers()
    let clock = T0
    let pushLive = true
    let ticks = 0
    const states = []

    startPolling({
        refreshSeconds: 10,
        tick: () => {
            ticks += 1
            return { ok: true }
        },
        isPushLive: () => pushLive,
        now: () => clock,
        setTimeout: timers.setTimeout,
        clearTimeout: timers.clearTimeout,
        onState: (state) => states.push(freshnessOf(state)),
    })

    check(
        'F1-first-cycle-runs-immediately',
        ticks === 1 && isPolling() && timers.pending() === 1,
        '启动即跑一轮（否则首屏要空等一个周期），并排好下一次',
    )
    check('F2-not-polling-before-start', DEFAULT_REFRESH_SECONDS === 30, `默认周期 ${DEFAULT_REFRESH_SECONDS} 秒（配置 runtime.refreshSeconds 可覆盖）`)

    // 推进两个周期（每周期取数成功）→ 一直新鲜。
    clock += 10_000
    await timers.step()
    clock += 10_000
    await timers.step()
    check(
        'F3-successful-cycles-stay-current',
        ticks === 3 && freshnessOf(getFreshnessState()) === FRESHNESS_VIEW.CURRENT,
        `${ticks} 个周期都成功 → 仍是「${freshnessText(freshnessOf(getFreshnessState()))}」`,
    )

    // WS 断线：**也算这一周期失败**（维护者口径），取数成功也不改变结论。
    pushLive = false
    clock += 10_000
    await timers.step()
    const afterOne = getFreshnessState()
    clock += 10_000
    await timers.step()
    const afterTwo = getFreshnessState()
    check(
        'F4-push-down-counts-as-failure',
        afterOne.consecutiveFailures === 1 &&
            freshnessOf(afterOne) === FRESHNESS_VIEW.CURRENT &&
            freshnessOf(afterTwo) === FRESHNESS_VIEW.STALE &&
            /状态推送未连接/.test(afterTwo.lastFailureReason),
        `WS 断线两个周期（REST 仍取数成功）→ 第 1 个周期仍是新鲜、第 2 个转「${freshnessText(freshnessOf(afterTwo))}」，原因是「${afterTwo.lastFailureReason}」`,
    )

    // 恢复推送 + 取数成功 → 回到新鲜（失败清零）。
    pushLive = true
    clock += 10_000
    await timers.step()
    check(
        'F5-recovery-clears-failures',
        freshnessOf(getFreshnessState()) === FRESHNESS_VIEW.CURRENT && getFreshnessState().consecutiveFailures === 0,
        `链路恢复后回到「${freshnessText(freshnessOf(getFreshnessState()))}」（连续失败清零）`,
    )

    check(
        'F6-tick-failure-counts',
        await (async () => {
            resetFreshness()
            const t2 = fakeTimers()
            let now2 = T0
            startPolling({
                refreshSeconds: 5,
                tick: () => false,
                isPushLive: () => true,
                now: () => now2,
                setTimeout: t2.setTimeout,
                clearTimeout: t2.clearTimeout,
            })
            // 启动即跑一轮（失败），再推进一个周期 → 连续 2 次失败。
            now2 += 5000
            await t2.step()
            const state = getFreshnessState()
            stopPolling()
            return state.consecutiveFailures === 2
        })(),
        '`tick` 返回 false 也算失败周期（取数失败与 WS 断线两条路都进同一本账）',
    )

    // 停止必须清干净（票 15 刚在"漏取消定时器"上栽过）。
    stopPolling()
    check(
        'F7-stop-clears-timer',
        isPolling() === false && timers.pending() === 0,
        `stopPolling 后定时器剩 ${timers.pending()} 个、isPolling=${isPolling()}`,
    )
    check(
        'F8-tick-throw-is-failure',
        (() => {
            resetFreshness()
            const t3 = fakeTimers()
            startPolling({
                refreshSeconds: 5,
                tick: () => {
                    throw new Error('boom')
                },
                isPushLive: () => true,
                now: () => T0,
                setTimeout: t3.setTimeout,
                clearTimeout: t3.clearTimeout,
            })
            const state = getFreshnessState()
            stopPolling()
            return state.consecutiveFailures === 1 && /boom/.test(state.lastFailureReason)
        })(),
        '`tick` 抛错也收成失败周期（不把异常冒成页面级报错）',
    )
    resetFreshness()
}

// ================================================================ F9 store 接线（推送到达 = 链路活着）

{
    const runtimeStore = useRuntimeStore()
    runtimeStore.reset()
    runtimeStore.startFreshness({
        refreshSeconds: 10,
        tick: () => ({ ok: true }),
        now: () => T0,
    })
    runtimeStore.stopFreshness()
    // 没有连接时 WS 不可用 → 启动那一轮**算失败**（这正是维护者口径：断线也算失败周期）。
    const beforeFailures = runtimeStore.freshnessState.consecutiveFailures
    const beforeSuccesses = runtimeStore.freshnessState.successes

    // 推送到达 → 连续失败清零并记一次成功（否则安静的推送周期会被误判成过期）。
    runtimeStore.ingest({ deviceCode: 'EQ-1', monitoringPointCode: 'MP-1', status: 'ALARM', serverUpdatedAt: '2026-09-24T10:00:05+08:00' })
    check(
        'F9-push-arrival-counts-as-live',
        beforeFailures >= 1 &&
            runtimeStore.freshnessState.consecutiveFailures === 0 &&
            runtimeStore.freshnessState.successes > beforeSuccesses,
        `WS 未连时启动那轮先记失败（${beforeFailures} 次）；推送到达后连续失败清零、成功数 ${beforeSuccesses} → ${runtimeStore.freshnessState.successes}`,
    )
    check(
        'F10-store-exposes-view-for-ui',
        typeof runtimeStore.freshness.view === 'string' &&
            typeof runtimeStore.freshness.text === 'string' &&
            typeof runtimeStore.retained === 'boolean',
        `store 给出视图对象（view=${runtimeStore.freshness.view}、text=「${runtimeStore.freshness.text}」）供组件直接消费`,
    )
    runtimeStore.reset()
}

// ================================================================ G 静态守卫

{
    const shellCode = readVueCode('CockpitShell.vue')
    check(
        'G1-shell-shows-freshness',
        /data-freshness/.test(shellCode) && /runtimeStore\.freshness/.test(shellCode),
        '外壳把新鲜度画出来（data-freshness / data-freshness-at 是走查断言面）',
    )
    check(
        'G2-shell-does-not-own-wording',
        !/数据已过期|数据不可用（尚未/.test(shellCode),
        '外壳不自己拼状态文案（文案只在 domain/freshnessModel.js 一份）',
    )
    check(
        'G3-shell-stops-polling-on-unmount',
        /stopFreshness\(\)/.test(readVueCode('CockpitShell.vue')),
        '离开外壳必须停轮询（定时器不跟着页面跑下去）',
    )
    check(
        'G4-domain-pure-and-no-timer',
        !/\bfetch\s*\(|XMLHttpRequest|setTimeout|setInterval/.test(read('domain/freshnessModel.js')) &&
            !/from '\.\.\/services\//.test(read('domain/freshnessModel.js')),
        'domain/freshnessModel.js 是纯函数（不发请求、不 import service、不自己起定时器）',
    )
    check(
        'G5-service-timers-are-injectable',
        /config\.setTimeout \|\|/.test(readCode('services/freshnessService.js')) &&
            /config\.clearTimeout \|\|/.test(readCode('services/freshnessService.js')),
        '轮询服务的定时器可注入（单测与走查用假定时器演示两个周期）',
    )
    check(
        'G6-period-comes-from-config',
        (() => {
            const { config, issues } = normalizeConfig({ runtime: { refreshSeconds: 15 } })
            const bad = normalizeConfig({ runtime: { refreshSeconds: 0 } })
            return config.runtime.refreshSeconds === 15 && bad.config.runtime.refreshSeconds === 30 && bad.issues.length > 0
        })(),
        '周期来自配置 runtime.refreshSeconds；0/负数被拒并退回默认（否则"两个周期"永远不成立）',
    )
    check(
        'G7-no-credential-in-freshness-modules',
        !/Authorization|Bearer|api\.token|ws\.token/.test(read('domain/freshnessModel.js')) &&
            !/Authorization|Bearer/.test(readCode('services/freshnessService.js')),
        '新鲜度两层都不碰凭据',
    )
    check(
        'G8-store-owns-the-accounting',
        /recordExternal/.test(readCode('stores/runtimeStore.js')) && /isPushLive: \(\) => live\.value/.test(readCode('stores/runtimeStore.js')),
        'WS 可用性取自 store 的连接状态（方向不反：service 不认识 store）',
    )

    // 「部分失败」必须真的被界面消费 —— 变异测试暴露过：纯函数写了却没人用（死代码），
    // 验收第 2 条会因此名存实亡。
    check(
        'G9-partial-state-is-consumed-by-ui',
        /overallFreshness\(/.test(shellCode) &&
            /overallFreshnessText\(/.test(shellCode) &&
            /data-freshness-partial/.test(shellCode),
        '「部分失败」被外壳真的画出来（data-freshness-partial），不是只写在 domain 里',
    )
    check(
        'G10-bridges-section-to-freshness',
        viewFromSectionState('stale') === FRESHNESS_VIEW.STALE &&
            viewFromSectionState('failed') === FRESHNESS_VIEW.UNAVAILABLE &&
            viewFromSectionState('') === '' &&
            sectionStateOf({ state: 'success' }) === 'success' &&
            sectionStateOf(null) === '',
        '分区状态与新鲜度四态之间有唯一一处显式翻译（界面不自己数数）',
    )
}

const failed = checks.filter((item) => !item.pass)
console.log('')
console.log(`T16 数据新鲜度检查：${checks.length - failed.length}/${checks.length} 项通过。`)
if (failed.length) {
    console.log('未通过：')
    for (const item of failed) console.log(`  · ${item.name}`)
    process.exit(1)
}
console.log('T16 数据新鲜度全部通过。')