Empty state

import type { ComponentProps, ReactNode } from "react";

export interface EmptyStateProps extends Omit<ComponentProps<"div">, "title"> {
  /** A mark above the title: an icon, an illustration. */
  icon?: ReactNode;
  title: ReactNode;
  description?: ReactNode;
}

/** What goes where content will be, before there is any. The children are the actions. */
export function EmptyState({ icon, title, description, className, children, ...props }: EmptyStateProps) {
  return (
    <div
      data-slot="empty-state"
      {...props}
      className={[
        "flex flex-col items-center gap-(--tui-empty-state-gap) rounded-(--tui-empty-state-radius) border-(length:--tui-empty-state-border-width) border-(--tui-empty-state-border) bg-(--tui-empty-state-bg) p-(--tui-empty-state-padding) text-center font-(family-name:--tui-font) [border-style:var(--tui-empty-state-border-style)]",
        className,
      ]
        .filter(Boolean)
        .join(" ")}
    >
      {icon && <div className="flex size-(--tui-empty-state-icon-size) items-center justify-center rounded-(--tui-empty-state-icon-radius) bg-(--tui-empty-state-icon-bg) text-(--tui-empty-state-icon-fg)">{icon}</div>}
      <div className="flex flex-col gap-1">
        <div className="text-(length:--tui-empty-state-title-size) leading-tight font-(--tui-empty-state-title-weight) text-(--tui-empty-state-fg)">{title}</div>
        {description && <div className="max-w-[36ch] text-(length:--tui-text) leading-normal text-(--tui-empty-state-muted)">{description}</div>}
      </div>
      {children && <div className="flex flex-wrap items-center justify-center gap-2">{children}</div>}
    </div>
  );
}

:root {
  color-scheme: light;
  --tui-bg: #ffffff;
  --tui-fg: #0a0a0a;
  --tui-muted: #f5f5f5;
  --tui-muted-fg: #737373;
  --tui-border: #e5e5e5;
  --tui-primary: #171717;
  --tui-primary-fg: #fafafa;
  --tui-ring: #a3a3a3;
  --tui-success: #16a34a;
  --tui-warning: #d97706;
  --tui-danger: #dc2626;
  --tui-radius: 8px;
  --tui-border-width: 1px;
  --tui-space: 4px;
  --tui-shadow: none;
  --tui-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --tui-text: 14px;
  --tui-duration: 150ms;

  /* Empty state */
  --tui-empty-state-padding: calc(var(--tui-space) * 8);
  --tui-empty-state-gap: calc(var(--tui-space) * 4);
  --tui-empty-state-icon-size: calc(var(--tui-space) * 11);
  --tui-empty-state-radius: calc(var(--tui-radius) * 1.5);
  --tui-empty-state-icon-radius: var(--tui-radius);
  --tui-empty-state-border-width: var(--tui-border-width);
  --tui-empty-state-border-style: dashed;
  --tui-empty-state-title-size: 16px;
  --tui-empty-state-title-weight: 600;
  --tui-empty-state-bg: transparent;
  --tui-empty-state-fg: var(--tui-fg);
  --tui-empty-state-muted: var(--tui-muted-fg);
  --tui-empty-state-border: var(--tui-border);
  --tui-empty-state-icon-bg: var(--tui-muted);
  --tui-empty-state-icon-fg: var(--tui-muted-fg);
}

.dark,
[data-theme="dark"] {
  color-scheme: dark;
  --tui-bg: #0a0a0a;
  --tui-fg: #fafafa;
  --tui-muted: #1c1c1c;
  --tui-muted-fg: #a3a3a3;
  --tui-border: #2a2a2a;
  --tui-primary: #fafafa;
  --tui-primary-fg: #171717;
  --tui-ring: #737373;
  --tui-success: #22c55e;
  --tui-warning: #f59e0b;
  --tui-danger: #ef4444;
}