/** Node + Pillow CPU fixture check. Does not launch or emulate browser/GPU QA. */
import assert from 'node:assert/strict';
import {readFile,readdir,mkdtemp} from 'node:fs/promises';
import {tmpdir} from 'node:os';
import {join} from 'node:path';
import {spawnSync} from 'node:child_process';
import {createHash} from 'node:crypto';
import {loadTypescript} from './support/load-typescript.mjs';
const root=await mkdtemp(join(tmpdir(),'behind-glass-photo-fixtures-'));
const python=(...args)=>{const r=spawnSync('python',['scripts/support/photo-fixtures.py',...args],{encoding:'utf8'});if(r.status)throw new Error(r.stderr);return JSON.parse(r.stdout);};
python('generate',root);
const {createPhotoSnapshot}=await loadTypescript(new URL('../src/input/PhotoSnapshot.ts',import.meta.url));
const {readPhotoMetadata}=await loadTypescript(new URL('../src/input/PhotoMetadata.ts',import.meta.url));
const rows=[];let closes=0;
globalThis.createImageBitmap=async(file,options)=>{assert.ok(options.resizeWidth<=1024&&options.resizeHeight<=1024,'all real fixture headers must enable first-decode bounds');const result=python('inspect',file.fixturePath,String(options.resizeWidth),String(options.resizeHeight));return{...result,close(){closes++;}};};
for(const name of await readdir(root)){
  const path=join(root,name),bytes=await readFile(path),hash=createHash('sha256').update(bytes).digest('hex');
  const blob=new Blob([bytes]);blob.fixturePath=path;
  const metadata=await readPhotoMetadata(blob),snapshot=await createPhotoSnapshot(blob,rows.length,new AbortController().signal),decoded=snapshot.bitmap;
  assert.equal(snapshot.width,metadata.width<=metadata.height?Math.round(1024*metadata.width/metadata.height):1024);
  assert.equal(snapshot.height,metadata.height<=metadata.width?Math.round(1024*metadata.height/metadata.width):1024);
  assert.equal(decoded.sha256,hash,'original bytes untouched');
  assert.equal(createHash('sha256').update(await readFile(path)).digest('hex'),hash);
  if(name.includes('alpha-rotated'))assert.deepEqual(decoded.corners.map(x=>x[3]),[64,255,0,192]);
  if(name.includes('alpha-mirrored'))assert.deepEqual(decoded.corners.map(x=>x[3]),[64,0,255,192]);
  if(name.includes('48mp'))assert.deepEqual(decoded.alphaExtrema,[128,128]);
  snapshot.bitmap.close();
  const {close,...values}=decoded;
  rows.push({file:name,...values,pixelReductionPercent:100*(1-values.workingRGBABytes/values.sourceRGBABytes)});
}
assert.equal(closes,rows.length);
console.log(JSON.stringify({verification:'CPU Pillow decoder behind a test double for createImageBitmap; actual TypeScript header/resize pipeline and real JPEG/PNG/WebP fixture bytes. Not browser-native decode, WebGL upload, device memory or FPS.',fixtureDirectory:root,rows},null,2));