Split collapsibles

"use client"

import * as React from "react"
import { ChevronDown } from "lucide-react"
import { AnimatePresence, motion, useReducedMotion } from "motion/react"

import { cn } from "@/lib/utils"

/* Split collapsible family: 5 collapsibles with the title on the left and the
   chevron on the right inside a pill/badge. Each export is a complete
   collapsible: a single trigger + a single expanding body, a button with
   aria-expanded, and a framer height auto animation. Works controlled
   (open/onOpenChange) and uncontrolled (defaultOpen). The difference is on the
   right-hand BADGE: its shape and fill change (Pill, Square, Ghost, Outline,
   Filled). Color comes ONLY from tokens. Alpha via color-mix. No transform under
   reduced-motion. Size = padding + text scale. */

export type StyledSize = "sm" | "md" | "lg" | "xl"

interface StyledCollapsibleProps {
  className?: string
  size?: StyledSize
  title?: React.ReactNode
  children?: React.ReactNode
  open?: boolean
  defaultOpen?: boolean
  onOpenChange?: (o: boolean) => void
}

const headerPad: Record<StyledSize, string> = {
  sm: "px-3 py-2.5 text-sm",
  md: "px-4 py-3 text-sm",
  lg: "px-5 py-4 text-base",
  xl: "px-6 py-5 text-lg",
}

const bodyPad: Record<StyledSize, string> = {
  sm: "px-3 pb-2.5 text-sm",
  md: "px-4 pb-3 text-sm",
  lg: "px-5 pb-4 text-base",
  xl: "px-6 pb-5 text-base",
}

const iconSize: Record<StyledSize, string> = {
  sm: "size-4",
  md: "size-4",
  lg: "size-5",
  xl: "size-5",
}

const badgeSize: Record<StyledSize, string> = {
  sm: "size-6",
  md: "size-7",
  lg: "size-8",
  xl: "size-9",
}

const headerBase =
  "flex w-full items-center justify-between gap-3 text-left font-medium outline-none transition-colors focus-visible:ring-[3px] focus-visible:ring-ring/50"

const defaultTitle = "What is included?"

const defaultChildren =
  "Every plan ships the full component library, semantic tokens, and lifetime updates for the tier you own. Add any component with a single CLI command and keep the files fully editable."

/* Controlled and uncontrolled open state in a single hook. */
function useControllableOpen({
  open,
  defaultOpen,
  onOpenChange,
}: {
  open?: boolean
  defaultOpen?: boolean
  onOpenChange?: (o: boolean) => void
}) {
  const isControlled = open !== undefined
  const [internal, setInternal] = React.useState<boolean>(defaultOpen ?? false)
  const current = isControlled ? (open as boolean) : internal
  const toggle = React.useCallback(() => {
    const next = !current
    if (!isControlled) setInternal(next)
    onOpenChange?.(next)
  }, [current, isControlled, onOpenChange])
  return { isOpen: current, toggle }
}

function Panel({
  isOpen,
  size,
  children,
}: {
  isOpen: boolean
  size: StyledSize
  children: React.ReactNode
}) {
  const reduce = useReducedMotion()
  return (
    <AnimatePresence initial={false}>
      {isOpen && (
        <motion.div
          key="panel"
          initial={reduce ? false : { height: 0, opacity: 0 }}
          animate={{ height: "auto", opacity: 1 }}
          exit={{ height: 0, opacity: 0 }}
          transition={
            reduce ? { duration: 0 } : { duration: 0.25, ease: [0.4, 0, 0.2, 1] }
          }
          className="overflow-hidden"
        >
          <div className={cn(bodyPad[size], "text-muted-foreground")}>{children}</div>
        </motion.div>
      )}
    </AnimatePresence>
  )
}

/* Shared shell: the title on the left, a badge carrying a chevron on the right. badgeClass carries each variant's shape and fill technique. */
function SplitShell({
  props,
  badge,
  chevronColor,
}: {
  props: StyledCollapsibleProps
  badge: string
  chevronColor: string
}) {
  const { className, size = "md", title = defaultTitle, children = defaultChildren } = props
  const { isOpen, toggle } = useControllableOpen(props)
  const reduce = useReducedMotion()
  return (
    <div
      data-slot="styled-collapsible"
      className={cn(
        "overflow-hidden rounded-xl border border-border bg-background",
        className
      )}
    >
      <button
        type="button"
        aria-expanded={isOpen}
        onClick={toggle}
        className={cn(
          headerBase,
          headerPad[size],
          "hover:bg-[color-mix(in_oklab,var(--color-foreground)_4%,transparent)]"
        )}
      >
        <span className="min-w-0 flex-1 truncate">{title}</span>
        <span
          aria-hidden
          className={cn(
            "inline-flex shrink-0 items-center justify-center transition-colors",
            badgeSize[size],
            badge
          )}
        >
          <motion.span
            className={cn("inline-flex", chevronColor)}
            animate={reduce ? undefined : { rotate: isOpen ? 180 : 0 }}
            transition={reduce ? { duration: 0 } : { type: "spring" as const, stiffness: 300, damping: 24 }}
          >
            <ChevronDown className={iconSize[size]} />
          </motion.span>
        </span>
      </button>
      <Panel isOpen={isOpen} size={size}>
        {children}
      </Panel>
    </div>
  )
}

/* Pill: tam yuvarlak yumusak yuzey. */
export function PillCollapsible(props: StyledCollapsibleProps) {
  return (
    <SplitShell
      props={props}
      badge="rounded-full bg-[color-mix(in_oklab,var(--color-foreground)_8%,transparent)]"
      chevronColor="text-foreground"
    />
  )
}

/* Square: yumusak koseli kare yuzey. */
export function SquareCollapsible(props: StyledCollapsibleProps) {
  return (
    <SplitShell
      props={props}
      badge="rounded-md bg-[color-mix(in_oklab,var(--color-foreground)_8%,transparent)]"
      chevronColor="text-foreground"
    />
  )
}

/* Ghost: no surface, only a chevron; a muted tone. */
export function GhostCollapsible(props: StyledCollapsibleProps) {
  return (
    <SplitShell props={props} badge="rounded-full" chevronColor="text-muted-foreground" />
  )
}

/* Outline: seffaf, ince kenarli pill. */
export function OutlineCollapsible(props: StyledCollapsibleProps) {
  return (
    <SplitShell
      props={props}
      badge="rounded-full border border-border"
      chevronColor="text-foreground"
    />
  )
}

/* Filled: dolu primary pill, primary-foreground chevron. */
export function FilledCollapsible(props: StyledCollapsibleProps) {
  return (
    <SplitShell
      props={props}
      badge="rounded-full bg-primary"
      chevronColor="text-primary-foreground"
    />
  )
}