/**
 * 票 33 离线回归：30s 刷新触发全管线重同步的抽搐修复（不联网、不起 dev server）。
 *
 * 对应 [票 33](../issues/33-33-jitter-fix.md) 验收第 1 条（离线逻辑闸门）：
 *   1. `syncPipeLayer` 输入内容不变 → **零属性重赋值**（引用身份断言 + unchanged 计数有牙）；
 *   2. 输入真变化 → 差量正确：**增 / 删 / 改各至少一例**（管段与构件两条路径都覆盖）；
 *   3. `modeLayerPlan` 引用记忆：输入引用不变 → 计划输出**同一数组引用**（不再 slice 新数组）；
 *   4. 源码闸门：`syncPointMarkers` 差量化（函数体内不得再 `removeAll`）、
 *      `MapCanvas` 的 applyMarkers 批间合并、清层时索引作废——这三处在 Vue/引擎模块里，
 *      Node 下不便整模块加载，按 t25 的先例用源码断言锁定。
 *
 * 真机回归（验收第 2 条，票 26 探针判据）不在本脚本范围：需要 dev server + real 后端，
 * 按项目规则不自动运行。
 */
import assert from 'node:assert/strict'
import { register } from 'node:module'
import { readFileSync } from 'node:fs'
import { fileURLToPath } from 'node:url'
import { dirname, join } from 'node:path'

const here = dirname(fileURLToPath(import.meta.url))
register('./t33-cesium-stub-loader.mjs', new URL('file:///' + here.replace(/\\/g, '/') + '/').href)

// register 之后再动态 import：静态 import 会先于钩子注册求值。
const { syncPipeLayer, clearPipeLayer } = await import('../../../src/modules/cockpit/services/cesiumPipeLayer.js')
const { planModeLayers } = await import('../../../src/modules/cockpit/domain/modeLayerPlan.js')

let failed = 0
const checks = []
function check(name, action) {
    checks.push({ name, action })
}

// ---- 夹具：与 domain/pipeNetwork.js 输出同形的领域行 ----
const pipe = (code, overrides = {}) => ({
    code,
    industry: 'GAS',
    diameter: 200,
    material: 'PE',
    name: `管段${code}`,
    positions: [[110.39, 28.44], [110.40, 28.45]],
    ...overrides,
})
const component = (code, overrides = {}) => ({
    code,
    kind: 'valve',
    position: [110.395, 28.445],
    industry: 'GAS',
    networkId: 'P-1',
    label: '阀门',
    ...overrides,
})

function fakeViewer() {
    const sources = []
    return {
        sources,
        dataSources: {
            getByName: (name) => sources.filter((s) => s.name === name),
            add: async (s) => { sources.push(s); return s },
        },
    }
}

/** 抓当前图层里每个实体的渲染属性**引用**，供「零重赋值」身份比对。 */
function snapshotRefs(source) {
    return new Map(source.entities.values.map((e) => [e.id, {
        position: e.position, polyline: e.polyline, point: e.point, label: e.label, properties: e.properties,
    }]))
}

function assertNoReassign(source, before, exceptIds = []) {
    for (const [id, refs] of before) {
        const entity = source.entities.values.find((e) => e.id === id)
        assert.ok(entity, `${id} 应仍在图上`)
        for (const key of Object.keys(refs)) {
            if (exceptIds.includes(id)) continue
            assert.strictEqual(entity[key], refs[key], `${id}.${key} 被重赋值（应零写入）`)
        }
    }
}

const viewer = fakeViewer()
const sourceRef = () => viewer.sources[0]

const baseNetwork = () => ({
    pipes: [pipe('P-1'), pipe('P-2', { diameter: 400 }), pipe('P-3', { industry: 'DRAINAGE' })],
    components: [component('C-1'), component('C-2', { kind: 'elbow', label: '角管道' })],
})

/** 变化类用例各自从已知基线出发：图层先清空再灌满 baseNetwork（用例间不得互相污染）。 */
async function rebaseline() {
    await clearPipeLayer(viewer)
    await syncPipeLayer(viewer, baseNetwork())
}

// ---- 1. 首次全量 + 内容不变 → 零属性重赋值 ----
check('A1 首次同步全量上图，计数如实', async () => {
    const r1 = await syncPipeLayer(viewer, baseNetwork())
    assert.equal(r1.pipes, 3)
    assert.equal(r1.components, 2)
    assert.equal(r1.added, 5)
    assert.equal(r1.unchanged, 0)
    assert.equal(r1.rendered, true)
})

check('A2 输入内容不变：零属性重赋值，unchanged 计数有牙', async () => {
    const before = snapshotRefs(sourceRef())
    const r2 = await syncPipeLayer(viewer, baseNetwork())
    assert.equal(r2.added, 0, '内容不变不得再新增实体')
    assert.equal(r2.updated, 0, '内容不变不得有任何 upsert 写入')
    assert.equal(r2.unchanged, 5, 'unchanged 计数必须如实反映跳过数')
    assert.equal(r2.removed, 0)
    assertNoReassign(sourceRef(), before)
})

// ---- 2. 改：只动被改的那一个 ----
check('B1 改管径：只有该管段被重赋值，其余引用原样', async () => {
    await rebaseline()
    const before = snapshotRefs(sourceRef())
    const network = baseNetwork()
    network.pipes[1].diameter = 800
    const r = await syncPipeLayer(viewer, network)
    assert.equal(r.updated, 1)
    assert.equal(r.unchanged, 4)
    const p2 = sourceRef().entities.values.find((e) => e.id === 'pipe:P-2')
    assert.notStrictEqual(p2.polyline, before.get('pipe:P-2').polyline, '被改的管段 polyline 必须换新')
    assertNoReassign(sourceRef(), before, ['pipe:P-2'])
})

check('B2 只改名称/材质这类渲染字段也要被看见（指纹不许漏字段）', async () => {
    await rebaseline()
    const network = baseNetwork()
    network.pipes[1].name = '改名后的管段'
    const r = await syncPipeLayer(viewer, network)
    assert.equal(r.updated, 1, '名称变了却判「未变」＝指纹漏字段')
})

check('B3 改构件：位置变化走构件路径差量', async () => {
    await rebaseline()
    const before = snapshotRefs(sourceRef())
    const network = baseNetwork()
    network.components[0].position = [110.41, 28.46]
    const r = await syncPipeLayer(viewer, network)
    assert.equal(r.updated, 1)
    const c1 = sourceRef().entities.values.find((e) => e.id === 'component:C-1')
    assert.notStrictEqual(c1.position, before.get('component:C-1').position)
})

// ---- 3. 删 ----
check('C1 删管段：精确撤下那一个', async () => {
    await rebaseline()
    const network = baseNetwork()
    network.pipes = network.pipes.filter((p) => p.code !== 'P-1')
    const r = await syncPipeLayer(viewer, network)
    assert.equal(r.removed, 1)
    assert.ok(!sourceRef().entities.values.some((e) => e.id === 'pipe:P-1'), '被删管段不得留在图上')
    assert.equal(sourceRef().entities.values.length, 4)
})

check('C2 删构件：同一条差量路径', async () => {
    await rebaseline()
    const network = baseNetwork()
    network.components = network.components.filter((c) => c.code !== 'C-2')
    const r = await syncPipeLayer(viewer, network)
    assert.equal(r.removed, 1)
    assert.ok(!sourceRef().entities.values.some((e) => e.id === 'component:C-2'))
})

// ---- 4. 增 ----
check('D1 增管段/构件：只 add 新的，存量不动', async () => {
    await rebaseline()
    const before = snapshotRefs(sourceRef())
    const network = baseNetwork()
    network.pipes.push(pipe('P-9', { industry: 'WATER_SUPPLY' }))
    network.components.push(component('C-9', { kind: 'branch', label: '支管管道' }))
    const r = await syncPipeLayer(viewer, network)
    assert.equal(r.added, 2)
    assert.equal(r.unchanged, sourceRef().entities.values.length - 2)
    assertNoReassign(sourceRef(), before)
})

// ---- 5. 计划层引用记忆（modeLayerPlan）----
check('E1 输入引用不变：计划输出同一数组引用（不再 slice 新数组）', () => {
    const facilities = [component('C-1')]
    const pipelines = [pipe('P-1')]
    const args = { mode: 'infrastructure', objects: [], facilities, pipelines }
    const p1 = planModeLayers(args)
    const p2 = planModeLayers(args)
    assert.strictEqual(p2.pipelines, pipelines, 'pipelines 必须原样引用')
    assert.strictEqual(p2.facilities, facilities, 'facilities 必须原样引用')
    assert.strictEqual(p2.pipelines, p1.pipelines)
})

check('E2 隐藏模式的空数组语义不变（hidden → []，自动撤下）', () => {
    const plan = planModeLayers({ mode: 'monitoring', objects: [], facilities: [component('C-1')], pipelines: [pipe('P-1')] })
    assert.deepEqual(plan.facilities, [])
})

check('E3 未就绪降级语义不变（null 仍 → [] + degradedNotes）', () => {
    const plan = planModeLayers({ mode: 'infrastructure', objects: [], facilities: null, pipelines: null })
    assert.deepEqual(plan.pipelines, [])
    assert.deepEqual(plan.facilities, [])
    const keys = plan.degradedNotes.map((n) => n.key)
    assert.ok(keys.includes('pipelines-unready'), '管线未就绪说明必须还在')
    assert.ok(keys.includes('facilities-unready'), '设施未就绪说明必须还在')
})

// ---- 6. 源码闸门：Node 下不便整模块加载的三处，按 t25 先例用源码断言 ----
const engineSource = readFileSync(join(here, '../../../src/modules/cockpit/services/cesiumEngine.js'), 'utf8')
const canvasSource = readFileSync(join(here, '../../../src/modules/cockpit/components/MapCanvas.vue'), 'utf8')

function functionBody(source, signature) {
    const start = source.indexOf(signature)
    assert.ok(start !== -1, `源码里找不到 ${signature}`)
    const bodyStart = source.indexOf('{', start)
    let depth = 0
    for (let i = bodyStart; i < source.length; i += 1) {
        if (source[i] === '{') depth += 1
        if (source[i] === '}') {
            depth -= 1
            if (depth === 0) {
                // 剥掉注释再交给断言：注释里的词（比如解释「废止 removeAll」）不是代码。
                return source.slice(bodyStart, i + 1)
                    .replace(/\/\*[\s\S]*?\*\//g, '')
                    .replace(/^\s*\/\/.*$/gm, '')
            }
        }
    }
    throw new Error('函数体未闭合')
}

check('F1 syncPointMarkers 函数体内不得再有 removeAll（整层重建废止）', () => {
    const body = functionBody(engineSource, 'export function syncPointMarkers(')
    assert.doesNotMatch(body, /removeAll/, 'syncPointMarkers 必须差量同步')
    assert.match(body, /markerEntityIndex/, '必须带差量索引')
    assert.match(body, /markerFingerprint/, '必须按内容指纹判「未变」')
})

check('F2 clearPointMarkers 清层时必须作废差量索引', () => {
    const body = functionBody(engineSource, 'export function clearPointMarkers(')
    assert.match(body, /markerEntityIndex\.delete/, '留指纹会把下次同步误判成「未变」')
})

check('F3 MapCanvas：watch 走 applyMarkersMerged，且落尾定时器在卸载时清掉', () => {
    assert.match(canvasSource, /APPLY_MERGE_MS\s*=\s*120/, '合并窗口必须与 auto-batch 间隔同值')
    assert.match(canvasSource, /=> applyMarkersMerged\(\)/, 'marker watch 必须走合并入口')
    assert.match(canvasSource, /pendingApplyTimer[\s\S]{0,200}clearTimeout/, '卸载时必须清落尾定时器')
})

check('F4 modeLayerPlan：不再 slice() 出新数组', () => {
    const source = readFileSync(join(here, '../../../src/modules/cockpit/domain/modeLayerPlan.js'), 'utf8')
    assert.doesNotMatch(source, /facilities\.slice\(\)/)
    assert.doesNotMatch(source, /pipelines\.slice\(\)/)
})

for (const { name, action } of checks) {
    try {
        await action()
        console.log(`PASS ${name}`)
    } catch (error) {
        failed += 1
        console.error(`FAIL ${name}: ${String(error.message).split('\n')[0]}`)
    }
}

console.log(`T33 抽搐修复: ${failed ? 'FAILED' : 'passed'}`)
process.exitCode = failed ? 1 : 0