// Real render regression using the application engine and an entirely buried red 3D Tiles cube.
// Run with COCKPIT_BASE and OCCLUSION_TERRAIN=local|ellipsoid; /gis/model-review mounts this directory.
import assert from 'node:assert/strict'
import { mkdirSync, writeFileSync } from 'node:fs'
import { resolve } from 'node:path'
import { PNG } from 'pngjs'
import { Cartesian3, Transforms, Matrix4 } from 'cesium'
const BASE = process.env.MODEL_REVIEW_BASE || 'http://127.0.0.1:8092'
const USE_DEM = process.env.OCCLUSION_TERRAIN === 'local'
const OUT = resolve('.scratch/cockpit-shell-panel-layout/verify/artifacts/t35/occlusion' + (USE_DEM ? '-dem' : ''))
const FIXTURE = resolve('tools/city-massing/district/occlusion-fixture')
mkdirSync(OUT, { recursive: true })
mkdirSync(FIXTURE, { recursive: true })
const p = [
    -40, -110, -40, 40, -110, -40, 40, -30, -40, -40, -30, -40, -40, -110, 40, 40, -110, 40, 40, -30, 40, -40, -30, 40,
]
const ix = [0, 1, 2, 0, 2, 3, 4, 6, 5, 4, 7, 6, 0, 4, 5, 0, 5, 1, 3, 2, 6, 3, 6, 7, 0, 3, 7, 0, 7, 4, 1, 5, 6, 1, 6, 2]
const bin = Buffer.concat([Buffer.from(new Float32Array(p).buffer), Buffer.from(new Uint16Array(ix).buffer)])
const doc = {
    asset: { version: '2.0' },
    scene: 0,
    scenes: [{ nodes: [0] }],
    nodes: [{ mesh: 0 }],
    meshes: [{ primitives: [{ attributes: { POSITION: 0 }, indices: 1, material: 0 }] }],
    materials: [
        {
            extensions: { KHR_materials_unlit: {} },
            pbrMetallicRoughness: { baseColorFactor: [1, 0, 0, 1] },
            doubleSided: true,
        },
    ],
    extensionsUsed: ['KHR_materials_unlit'],
    buffers: [{ byteLength: bin.length }],
    bufferViews: [
        { buffer: 0, byteOffset: 0, byteLength: 96 },
        { buffer: 0, byteOffset: 96, byteLength: 72 },
    ],
    accessors: [
        { bufferView: 0, componentType: 5126, count: 8, type: 'VEC3', min: [-40, -110, -40], max: [40, -30, 40] },
        { bufferView: 1, componentType: 5123, count: 36, type: 'SCALAR' },
    ],
}
const txt = Buffer.from(JSON.stringify(doc))
const js = Buffer.concat([txt, Buffer.alloc((4 - (txt.length % 4)) % 4, 32)])
const header = Buffer.alloc(20)
header.write('glTF')
header.writeUInt32LE(2, 4)
header.writeUInt32LE(28 + js.length + bin.length, 8)
header.writeUInt32LE(js.length, 12)
header.write('JSON', 16)
const bh = Buffer.alloc(8)
bh.writeUInt32LE(bin.length)
bh.write('BIN\0', 4)
writeFileSync(resolve(FIXTURE, 'red.glb'), Buffer.concat([header, js, bh, bin]))
writeFileSync(
    resolve(FIXTURE, 'tileset.json'),
    JSON.stringify({
        asset: { version: '1.1' },
        geometricError: 1000,
        root: {
            transform: Matrix4.toArray(
                Transforms.eastNorthUpToFixedFrame(Cartesian3.fromDegrees(110.39028164, 28.4436787))
            ),
            boundingVolume: { box: [0, 0, -70, 40, 0, 0, 0, 40, 0, 0, 0, 40] },
            geometricError: 0,
            content: { uri: 'red.glb' },
        },
    })
)
const puppeteer = (
    await import(
        'file:///C:/Users/ASUS/.dsh/profiles/desktop/node_modules/puppeteer-core/lib/puppeteer/puppeteer-core.js'
    )
).default
const browser = await puppeteer.launch({
    executablePath: 'C:/Program Files/Google/Chrome/Application/chrome.exe',
    headless: true,
    defaultViewport: { width: 600, height: 600 },
    args: ['--no-sandbox'],
})
const results = []
try {
    const page = await browser.newPage()
    await page.goto(BASE + '/preview.html#automation', { waitUntil: 'domcontentloaded' })
    await page.waitForFunction(() => typeof window.startPreview === 'function')
    await page.evaluate(
        (dem) =>
            window.startPreview({
                model: '/review-assets/district/occlusion-fixture/tileset.json',
                terrain: dem,
                imagery: false,
            }),
        USE_DEM
    )
    await page.evaluate(() => {
        const { v, C } = window.scene35
        v.camera.setView({
            destination: C.Cartesian3.fromDegrees(110.39028164, 28.4436787, 750),
            orientation: { heading: 0, pitch: -Math.PI / 2, roll: 0 },
        })
        document.querySelector('#caption').style.display = 'none'
    })
    await page.waitForFunction(() => window.scene35.v.scene.globe._surface._tilesToRender.length > 0, {
        timeout: 45000,
    })
    async function capture(name, mode) {
        const state = await page.evaluate((mode) => {
            const { v, E, tiles } = window.scene35
            if (mode === 'off') v.scene.globe.depthTestAgainstTerrain = false
            if (mode === 'on') v.scene.globe.depthTestAgainstTerrain = true
            if (mode === 'ground') E.applyViewModeLayers(v, tiles, { mode: 'ground', terrainAlpha: 1, tilesetAlpha: 1 })
            if (mode === 'pipeline')
                E.applyViewModeLayers(v, tiles, { mode: 'pipeline', terrainAlpha: 0.45, tilesetAlpha: 0.4 })
            return { depth: v.scene.globe.depthTestAgainstTerrain, translucent: v.scene.globe.translucency.enabled }
        }, mode)
        await page.waitForFunction(() => window.scene35.tiles[0].root.content != null, { timeout: 30000 })
        const frames = await page.evaluate(() => window.frameCount)
        await page.waitForFunction((f) => window.frameCount > f + 40, {}, frames)
        const im = PNG.sync.read(Buffer.from(await page.screenshot({ path: resolve(OUT, name + '.png') })))
        let red = 0
        for (let y = 190; y < 410; y++)
            for (let x = 190; x < 410; x++) {
                const i = (y * im.width + x) * 4
                if (im.data[i] > 100 && im.data[i] > im.data[i + 1] * 1.8 && im.data[i] > im.data[i + 2] * 1.8) red++
            }
        const row = { name, ...state, redPixels: red }
        results.push(row)
        console.log(JSON.stringify(row))
        return red
    }
    const initial = await capture('01-actual-initial', 'initial')
    const off = await capture('02-control-depth-off', 'off')
    const on = await capture('03-control-depth-on', 'on')
    const pipe = await capture('04-pipeline', 'pipeline')
    const ground = await capture('05-ground-return', 'ground')
    writeFileSync(
        resolve(OUT, 'report.json'),
        JSON.stringify({ terrain: USE_DEM ? 'local-dem' : 'ellipsoid', results }, null, 2)
    )
    assert(off > 100, 'Positive control must show buried model with depth off')
    assert(on < 5, 'Depth-on must hide buried model')
    assert(initial < 5, 'Actual createViewer must not see through terrain')
    assert(pipe > 100, 'Explicit pipeline translucency must permit viewing below ground')
    assert(ground < 5, 'Ground mode must restore terrain occlusion')
    console.log('PASS actual terrain depth, negative control, pipeline and return')
} finally {
    await browser.close()
}