'use client'

import { useEffect, useState } from 'react'

// Concept dry-table (scenes 9/10): borderless table straight on the panel,
// uppercase hairline heads, 13px rows, hover-revealed row controls. Shared by
// the verifikat list and the transaction inbox so the two read as the same
// instrument. Keep these in sync with .claude/rules/design.md; page-specific
// tweaks belong at the call site via cn(), not here.
export const TH_CLASS =
  'px-4 py-2.5 text-left text-[11px] font-medium uppercase tracking-[0.07em] text-muted-foreground border-b border-border whitespace-nowrap'
export const TD_CLASS = 'px-4 py-[11px] border-b border-border align-top'
export const VTH_CLASS =
  'py-2 pr-4 text-left text-[10.5px] font-medium uppercase tracking-[0.07em] text-muted-foreground border-b border-border'
export const VTD_CLASS = 'py-[7px] pr-4 border-b border-border/60 align-top'
export const QUIET_LINK_CLASS =
  'text-[12.5px] text-muted-foreground underline decoration-border underline-offset-4 transition-colors duration-150 hover:text-foreground'

// Row controls that stay out of the way until the row is hovered. Coarse
// pointers never fire hover, so without pointer-coarse: the control would be
// permanently invisible and the action unreachable on touch. Always use this
// constant instead of hand-rolling `opacity-0 group-hover:opacity-100`.
//
// focus-within is what makes this safe on a WRAPPER: focus-visible only matches
// the element itself, so a non-focusable <span> holding the buttons would stay
// transparent while a keyboard user tabbed through the controls inside it.
export const HOVER_REVEAL_CLASS =
  'opacity-0 transition-opacity group-hover:opacity-100 focus-visible:opacity-100 focus-within:opacity-100 pointer-coarse:opacity-100'

// Animated row expansion (concept vwrap/vinner): grid-rows 0fr -> 1fr on
// mount; the global reduced-motion rule collapses the transition.
export function RowFoldout({ children }: { children: React.ReactNode }) {
  const [open, setOpen] = useState(false)
  useEffect(() => {
    const raf = requestAnimationFrame(() => setOpen(true))
    return () => cancelAnimationFrame(raf)
  }, [])
  return (
    <div
      className="grid transition-[grid-template-rows] duration-300 ease-out"
      style={{ gridTemplateRows: open ? '1fr' : '0fr' }}
    >
      <div className="min-h-0 overflow-hidden">{children}</div>
    </div>
  )
}