const ANTIPATTERNS = [
  // ── AI slop: tells that something was AI-generated ──
  {
    id: 'side-tab',
    category: 'slop',
    name: 'Side-tab accent border',
    description:
      'Thick colored border on one side of a card — the most recognizable tell of AI-generated UIs. Use a subtler accent or remove it entirely.',
    skillSection: 'Visual Details',
    skillGuideline: 'colored accent stripe',
  },
  {
    id: 'border-accent-on-rounded',
    category: 'slop',
    name: 'Border accent on rounded element',
    description:
      'Thick accent border on a rounded card — the border clashes with the rounded corners. Remove the border or the border-radius.',
    skillSection: 'Visual Details',
    skillGuideline: 'colored accent stripe',
  },
  {
    id: 'overused-font',
    category: 'slop',
    name: 'Overused font',
    description:
      'Inter, Roboto, Fraunces, Geist, Plus Jakarta Sans, and Space Grotesk are used on so many sites they no longer feel distinctive. Each new wave of AI-generated UIs converges on the same handful of faces. Choose a face that gives your interface personality.',
    skillSection: 'Typography',
    skillGuideline: 'overused fonts like Inter',
  },
  {
    id: 'single-font',
    category: 'slop',
    name: 'Single font for everything',
    description:
      'Only one font family is used for the entire page. Pair a distinctive display font with a refined body font to create typographic hierarchy.',
    skillSection: 'Typography',
    skillGuideline: 'only one font family for the entire page',
  },
  {
    id: 'flat-type-hierarchy',
    category: 'slop',
    name: 'Flat type hierarchy',
    description:
      'Font sizes are too close together — no clear visual hierarchy. Use fewer sizes with more contrast (aim for at least a 1.25 ratio between steps).',
    skillSection: 'Typography',
    skillGuideline: 'flat type hierarchy',
  },
  {
    id: 'gradient-text',
    category: 'slop',
    name: 'Gradient text',
    description:
      'Gradient text is decorative rather than meaningful — a common AI tell, especially on headings and metrics. Use solid colors for text.',
    skillSection: 'Color & Contrast',
    skillGuideline: 'gradient text for',
  },
  {
    id: 'ai-color-palette',
    category: 'slop',
    name: 'AI color palette',
    description:
      'Purple/violet gradients and cyan-on-dark are the most recognizable tells of AI-generated UIs. Choose a distinctive, intentional palette.',
    skillSection: 'Color & Contrast',
    skillGuideline: 'AI color palette',
  },
  {
    id: 'nested-cards',
    category: 'slop',
    name: 'Nested cards',
    description:
      'Cards inside cards create visual noise and excessive depth. Flatten the hierarchy — use spacing, typography, and dividers instead of nesting containers.',
    skillSection: 'Layout & Space',
    skillGuideline: 'Nest cards inside cards',
  },
  {
    id: 'monotonous-spacing',
    category: 'slop',
    name: 'Monotonous spacing',
    description:
      'The same spacing value used everywhere — no rhythm, no variation. Use tight groupings for related items and generous separations between sections.',
    skillSection: 'Layout & Space',
    skillGuideline: 'same spacing everywhere',
  },
  {
    id: 'everything-centered',
    category: 'slop',
    name: 'Everything centered',
    description:
      'Every text element is center-aligned. Left-aligned text with asymmetric layouts feels more designed. Center only hero sections and CTAs.',
    skillSection: 'Layout & Space',
    skillGuideline: 'Center everything',
  },
  {
    id: 'bounce-easing',
    category: 'slop',
    name: 'Bounce or elastic easing',
    description:
      'Bounce and elastic easing feel dated and tacky. Real objects decelerate smoothly — use exponential easing (ease-out-quart/quint/expo) instead.',
    skillSection: 'Motion',
    skillGuideline: 'bounce or elastic easing',
  },
  {
    id: 'dark-glow',
    category: 'slop',
    name: 'Dark mode with glowing accents',
    description:
      'Dark backgrounds with colored box-shadow glows are the default "cool" look of AI-generated UIs. Use subtle, purposeful lighting instead — or skip the dark theme entirely.',
    skillSection: 'Color & Contrast',
    skillGuideline: 'dark mode with glowing accents',
  },
  {
    id: 'icon-tile-stack',
    category: 'slop',
    name: 'Icon tile stacked above heading',
    description:
      'A small rounded-square icon container above a heading is the universal AI feature-card template — every generator outputs this exact shape. Try a side-by-side icon and heading, or let the icon sit in flow without its own container.',
    skillSection: 'Typography',
    skillGuideline: 'large icons with rounded corners above every heading',
  },
  {
    id: 'italic-serif-display',
    category: 'slop',
    name: 'Italic serif display headline',
    description:
      'Oversized italic serif (Fraunces, Recoleta, Playfair, Newsreader-italic) as the primary hero headline reads as taste in isolation but has become the universal AI-startup landing page hero. Set roman, or move to a non-serif display face. Editorial / magazine register may legitimately want this — judge by context.',
    skillSection: 'Typography',
    skillGuideline: 'oversized italic serif as the hero headline',
  },
  {
    id: 'hero-eyebrow-chip',
    category: 'slop',
    name: 'Hero eyebrow / pill chip',
    description:
      'A tiny uppercase letter-spaced label sitting immediately above an oversized hero headline — or the same shape rendered as a pill chip — is now the default AI SaaS hero. Drop the eyebrow, integrate the kicker into the headline, or run it as a navigation breadcrumb instead.',
    skillSection: 'Typography',
    skillGuideline: 'tiny uppercase tracked label above the hero headline',
  },
  {
    id: 'repeated-section-kickers',
    category: 'slop',
    severity: 'advisory',
    name: 'Repeated section kicker labels',
    description:
      'Repeating tiny uppercase tracked labels above section headings turns a brand page into AI editorial scaffolding. Replace them with stronger structure, artifacts, imagery, or a deliberate brand system.',
    skillSection: 'Typography',
    skillGuideline: 'repeated eyebrow or kicker labels as section scaffolding',
  },

  // ── Quality: general design and accessibility issues ──
  {
    id: 'pure-black-white',
    category: 'quality',
    name: 'Pure black background',
    description:
      'Pure #000000 as a background color looks harsh and unnatural. Tint it slightly toward your brand hue (e.g., oklch(12% 0.01 250)) for a more refined feel.',
    skillSection: 'Color & Contrast',
    skillGuideline: 'pure black (#000)',
  },
  {
    id: 'gray-on-color',
    category: 'quality',
    name: 'Gray text on colored background',
    description:
      'Gray text looks washed out on colored backgrounds. Use a darker shade of the background color instead, or white/near-white for contrast.',
    skillSection: 'Color & Contrast',
    skillGuideline: 'gray text on colored backgrounds',
  },
  {
    id: 'low-contrast',
    category: 'quality',
    name: 'Low contrast text',
    description:
      'Text does not meet WCAG AA contrast requirements (4.5:1 for body, 3:1 for large text). Increase the contrast between text and background.',
  },
  {
    id: 'layout-transition',
    category: 'quality',
    name: 'Layout property animation',
    description:
      'Animating width, height, padding, or margin causes layout thrash and janky performance. Use transform and opacity instead, or grid-template-rows for height animations.',
    skillSection: 'Motion',
    skillGuideline: 'Animate layout properties',
  },
  {
    id: 'line-length',
    category: 'quality',
    name: 'Line length too long',
    description:
      'Text lines wider than ~80 characters are hard to read. The eye loses its place tracking back to the start of the next line. Add a max-width (65ch to 75ch) to text containers.',
    skillSection: 'Layout & Space',
    skillGuideline: 'wrap beyond ~80 characters',
  },
  {
    id: 'cramped-padding',
    category: 'quality',
    name: 'Cramped padding',
    description:
      'Text is too close to the edge of its container. Add at least 8px (ideally 12-16px) of padding inside bordered or colored containers.',
  },
  {
    id: 'body-text-viewport-edge',
    category: 'quality',
    name: 'Body text touching viewport edge',
    description:
      'Body paragraphs render flush against the left or right viewport edge with no container providing horizontal padding. Wrap content in a container with at least 16px (ideally 24-32px) of horizontal padding, or apply max-width with mx-auto.',
  },
  {
    id: 'tight-leading',
    category: 'quality',
    name: 'Tight line height',
    description:
      'Line height below 1.3x the font size makes multi-line text hard to read. Use 1.5 to 1.7 for body text so lines have room to breathe.',
  },
  {
    id: 'skipped-heading',
    category: 'quality',
    name: 'Skipped heading level',
    description:
      'Heading levels should not skip (e.g. h1 then h3 with no h2). Screen readers use heading hierarchy for navigation. Skipping levels breaks the document outline.',
  },
  {
    id: 'justified-text',
    category: 'quality',
    name: 'Justified text',
    description:
      'Justified text without hyphenation creates uneven word spacing ("rivers of white"). Use text-align: left for body text, or enable hyphens: auto if you must justify.',
  },
  {
    id: 'tiny-text',
    category: 'quality',
    name: 'Tiny body text',
    description:
      'Body text below 12px is hard to read, especially on high-DPI screens. Use at least 14px for body content, 16px is ideal.',
  },
  {
    id: 'all-caps-body',
    category: 'quality',
    name: 'All-caps body text',
    description:
      'Long passages in uppercase are hard to read. We recognize words by shape (ascenders and descenders), which all-caps removes. Reserve uppercase for short labels and headings.',
    skillSection: 'Typography',
    skillGuideline: 'long body passages in uppercase',
  },
  {
    id: 'wide-tracking',
    category: 'quality',
    name: 'Wide letter spacing on body text',
    description:
      'Letter spacing above 0.05em on body text disrupts natural character groupings and slows reading. Reserve wide tracking for short uppercase labels only.',
  },
];

const RULE_ENGINE_SUPPORT = {
  regex: new Set(['source', 'page-analyzer']),
  'static-html': new Set(['element', 'page']),
  browser: new Set(['element', 'page', 'layout']),
  visual: new Set(['visual-contrast']),
};

function getAntipattern(id) {
  return ANTIPATTERNS.find(rule => rule.id === id);
}

function getRulesForCategory(category) {
  return ANTIPATTERNS.filter(rule => rule.category === category);
}

function getRuleEngineSupport(engine) {
  return RULE_ENGINE_SUPPORT[engine] || new Set();
}

export {
  ANTIPATTERNS,
  RULE_ENGINE_SUPPORT,
  getAntipattern,
  getRulesForCategory,
  getRuleEngineSupport,
};