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

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

const badgeVariants = cva(
  "group/badge inline-flex w-fit shrink-0 items-center justify-center gap-1 overflow-hidden rounded-4xl border border-transparent px-2 py-1 text-xs font-medium leading-none whitespace-nowrap transition-[color,background-color,border-color,box-shadow] duration-150 ease-out focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 has-data-[icon=inline-end]:pe-1.5 has-data-[icon=inline-start]:ps-1.5 aria-invalid:border-destructive aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 [&>svg]:pointer-events-none [&>svg]:size-3!",
  {
    variants: {
      variant: {
        default: "bg-primary text-primary-foreground [a]:hover:bg-primary/80",
        secondary:
          "bg-secondary text-secondary-foreground [a]:hover:bg-secondary/80",
        destructive:
          "bg-destructive/10 text-[var(--chip-destructive)] focus-visible:ring-destructive/20 dark:bg-destructive/20 dark:text-red-100 dark:focus-visible:ring-destructive/40 [a]:hover:bg-destructive/20",
        outline:
          "border-border text-foreground [a]:hover:bg-interactive-hover [a]:hover:text-muted-foreground",
        ghost:
          "hover:bg-interactive-hover hover:text-muted-foreground dark:hover:bg-interactive-hover-subtle",
        link: "text-primary underline-offset-4 hover:underline",
        /** Leo / Ask prompt chips — readable on light, dark, and HC canvas backgrounds. */
        prompt:
          [
            "h-auto min-h-8 max-w-full items-stretch whitespace-normal rounded-full border-border bg-muted p-0 font-normal text-foreground shadow-sm",
            "[&_button]:text-foreground [&_button]:hover:text-foreground [&_span]:text-foreground",
            "hc:!border-foreground hc:!bg-background hc:!font-normal hc:!text-foreground hc:shadow-none hc:[&_button]:!text-foreground hc:[&_span]:!text-foreground",
            "forced-colors:border-[CanvasText] forced-colors:bg-[Canvas] forced-colors:text-[CanvasText] forced-colors:[&_*]:text-[CanvasText]",
          ].join(" "),
        /** Numeric count only — solid destructive fill for selection counts and bulk bars. */
        count:
          "min-w-6 justify-center rounded-md border-transparent bg-destructive px-1.5 py-0.5 text-xs font-semibold text-destructive-foreground tabular-nums [a]:hover:bg-destructive/90",
      },
    },
    defaultVariants: {
      variant: "default",
    },
  }
)

function Badge({
  className,
  variant = "default",
  asChild = false,
  ...props
}: React.ComponentProps<"span"> &
  VariantProps<typeof badgeVariants> & { asChild?: boolean }) {
  const Comp = asChild ? Slot.Root : "span"

  return (
    <Comp
      data-slot="badge"
      data-variant={variant}
      className={cn(badgeVariants({ variant }), className)}
      {...props}
    />
  )
}

export interface BadgeCountProps
  extends Omit<React.ComponentProps<typeof Badge>, "variant" | "children"> {
  count: number
  /** Caps display at `max+` (default 99). */
  max?: number
}

/** Red count-only chip — bulk action bar, selection tallies, inline numeric emphasis. */
function BadgeCount({ count, max = 99, className, ...props }: BadgeCountProps) {
  const display = count > max ? `${max}+` : count
  return (
    <Badge variant="count" className={className} {...props}>
      {display}
    </Badge>
  )
}

/** Uppercase Leo / AI affordance — WCAG-safe on light, dark, and HC surfaces. */
function BadgeAi({ className, ...props }: Omit<React.ComponentProps<"span">, "children">) {
  return (
    <span
      data-slot="badge-ai"
      className={cn(
        "inline-flex shrink-0 items-center rounded-full border border-border bg-muted px-1.5 py-px text-2xs font-bold uppercase tracking-wider text-foreground",
        "dark:bg-muted hc:bg-background hc:text-foreground",
        className,
      )}
      {...props}
    >
      AI
    </span>
  )
}

export { Badge, BadgeCount, BadgeAi, badgeVariants }