export const PERFORMANCE_BUDGETS = Object.freeze({
  initialHtmlCriticalCss: 100 * 1024,
  initialApplicationJs: 120 * 1024,
  heroPoster: 220 * 1024,
  initialFonts: 120 * 1024,
  firstLiveScene: 650 * 1024,
  projectVideo: 2.5 * 1024 * 1024,
  projectVideoDurationSeconds: 10,
  projectVideoWidth: 1280,
  projectVideoHeight: 720,
  projectStill: 400 * 1024,
  chart: 100 * 1024,
  deferredProjectVisuals: 2.5 * 1024 * 1024,
  highTierExtras: 750 * 1024,
  deferredNonVideo: 3.5 * 1024 * 1024,
  imageSceneConcurrency: 2,
  videoConcurrency: 1,
  mobileTextureDimension: 2048,
  lowTierGpuEstimate: 96 * 1024 * 1024,
  highTierGpuEstimate: 192 * 1024 * 1024,
});

export const classifyArtifact = (path, source = '') => {
  if (path === 'index.html') return 'initial-html';
  if (/^assets\/index-[^/]+\.css$/u.test(path)) return 'critical-css';
  if (/^assets\/index-[^/]+\.js$/u.test(path) && /import\(/u.test(source)) return 'initial-application-js';
  if (/^assets\/environment-[^/]+\.js$/u.test(path)) return 'first-live-scene';
  if (/\.(?:woff2?|ttf|otf)$/u.test(path)) return 'initial-fonts';
  if (/^assets\/hero-[^/]+\.(?:avif|webp|png|jpe?g)$/u.test(path)) return 'hero-poster';
  if (/^assets\/project-[^/]+\.(?:webm|mp4)$/u.test(path)) return 'project-video';
  if (/^assets\/project-[^/]*chart[^/]*\.(?:avif|webp|png|jpe?g)$/u.test(path)) return 'chart';
  if (/^assets\/project-[^/]+\.(?:avif|webp|png|jpe?g|svg)$/u.test(path)) return 'project-still';
  if (/^(?:robots\.txt|sitemap\.xml|_headers\.example|_redirects\.example)$/u.test(path)) return 'release-metadata';
  throw new Error(`Artifact is unclassified: ${path}`);
};

const thresholdByTotal = Object.freeze({
  initialHtmlCriticalCss: PERFORMANCE_BUDGETS.initialHtmlCriticalCss,
  initialApplicationJs: PERFORMANCE_BUDGETS.initialApplicationJs,
  heroPoster: PERFORMANCE_BUDGETS.heroPoster,
  initialFonts: PERFORMANCE_BUDGETS.initialFonts,
  firstLiveScene: PERFORMANCE_BUDGETS.firstLiveScene,
  deferredProjectVisuals: PERFORMANCE_BUDGETS.deferredProjectVisuals,
  deferredNonVideo: PERFORMANCE_BUDGETS.deferredNonVideo,
});

export const evaluateBudgetTotals = (totals) => ({
  violations: Object.entries(thresholdByTotal)
    .filter(([budget, threshold]) => (totals[budget] ?? 0) > threshold)
    .map(([budget, threshold]) => ({ budget, actual: totals[budget], threshold })),
});