import * as React from "react"
import { cva, type VariantProps } from "class-variance-authority"
import { Slot } from "radix-ui"

import { cn } from "@/lib/utils"
import { Separator } from "./separator"

function ItemGroup({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      role="list"
      data-slot="item-group"
      className={cn("group/item-group flex flex-col", className)}
      {...props}
    />
  )
}

function ItemSeparator({
  className,
  ...props
}: React.ComponentProps<typeof Separator>) {
  return (
    <Separator
      data-slot="item-separator"
      orientation="horizontal"
      className={cn("my-0", className)}
      {...props}
    />
  )
}

const itemVariants = cva(
  "group/item flex flex-wrap items-center rounded-md border border-transparent text-sm transition-colors duration-100 outline-none focus-visible:border-primary-border focus-visible:ring-[3px] focus-visible:ring-primary-border/50 [a]:transition-colors [a]:hover:bg-fill-secondary/50",
  {
    variants: {
      variant: {
        default: "bg-transparent",
        outline: "border-border",
        muted: "bg-fill-tertiary/50",
      },
      size: {
        default: "gap-4 p-4",
        sm: "gap-2.5 px-4 py-3",
      },
    },
    defaultVariants: {
      variant: "default",
      size: "default",
    },
  }
)

function Item({
  className,
  variant = "default",
  size = "default",
  asChild = false,
  ...props
}: React.ComponentProps<"div"> &
  VariantProps<typeof itemVariants> & { asChild?: boolean }) {
  const Comp = asChild ? Slot.Root : "div"
  return (
    <Comp
      data-slot="item"
      data-variant={variant}
      data-size={size}
      className={cn(itemVariants({ variant, size, className }))}
      {...props}
    />
  )
}

const itemMediaVariants = cva(
  "flex shrink-0 items-center justify-center gap-2 group-has-[[data-slot=item-description]]/item:translate-y-0.5 group-has-[[data-slot=item-description]]/item:self-start [&_svg]:pointer-events-none",
  {
    variants: {
      variant: {
        default: "bg-transparent",
        icon: "size-8 rounded-sm border bg-fill-tertiary [&_svg:not([class*='size-'])]:size-4",
        image:
          "size-10 overflow-hidden rounded-sm [&_img]:size-full [&_img]:object-cover",
      },
    },
    defaultVariants: {
      variant: "default",
    },
  }
)

function ItemMedia({
  className,
  variant = "default",
  ...props
}: React.ComponentProps<"div"> & VariantProps<typeof itemMediaVariants>) {
  return (
    <div
      data-slot="item-media"
      data-variant={variant}
      className={cn(itemMediaVariants({ variant, className }))}
      {...props}
    />
  )
}

function ItemContent({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="item-content"
      className={cn(
        "flex flex-1 flex-col gap-1 [&+[data-slot=item-content]]:flex-none",
        className
      )}
      {...props}
    />
  )
}

function ItemTitle({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="item-title"
      className={cn(
        "flex w-fit items-center gap-2 text-sm leading-snug font-medium",
        className
      )}
      {...props}
    />
  )
}

function ItemDescription({ className, ...props }: React.ComponentProps<"p">) {
  return (
    <p
      data-slot="item-description"
      className={cn(
        "line-clamp-2 text-sm leading-normal font-normal text-balance text-text-tertiary",
        "[&>a]:underline [&>a]:underline-offset-4 [&>a:hover]:text-primary",
        className
      )}
      {...props}
    />
  )
}

function ItemActions({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="item-actions"
      className={cn("flex items-center gap-2", className)}
      {...props}
    />
  )
}

function ItemHeader({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="item-header"
      className={cn(
        "flex basis-full items-center justify-between gap-2",
        className
      )}
      {...props}
    />
  )
}

function ItemFooter({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="item-footer"
      className={cn(
        "flex basis-full items-center justify-between gap-2",
        className
      )}
      {...props}
    />
  )
}

export {
  Item,
  ItemMedia,
  ItemContent,
  ItemActions,
  ItemGroup,
  ItemSeparator,
  ItemTitle,
  ItemDescription,
  ItemHeader,
  ItemFooter,
}
/**
 * [WHO]: Item layout primitives for list rows, media slots, and metadata.
 * [FROM]: React, registry/basic/separator, registry/lib/utils.
 * [TO]: sparkdesign package consumers; Showcase; CLI registry copies.
 * [HERE]: registry/basic/item.tsx — tokenized shadcn-derived item primitive.
 *
 * [PROTOCOL]:
 * 1. Keep this P3 header in sync when the public contract changes.
 * 2. Update module AGENTS.md (P2) and root AGENTS.md (P1) when boundaries change.
 * 3. Follow design tokens and explicit type exports.
 */