import type { ReactNode } from 'react';
import { ChevronRight } from 'lucide-react';

// Shared visual language for the /soulseek grouped views (search results + downloads). Each top-level
// grouping (a peer/user) is an almost-black Card; each folder within it is a lifted SubCard. Kept here
// so search and downloads stay pixel-identical — change the look in one place.

export const Card = ({ children }: { children: ReactNode }) => (
  <div className="overflow-hidden rounded-xl border border-border bg-card shadow-sm">{children}</div>
);

// Supply exactly one of `title` (inert text — the whole row becomes the collapse toggle) or `titleMenu`
// (an interactive node such as the peer dropdown). A trigger can't live inside the toggle button, so with
// `titleMenu` the row splits: the chevron and the empty space after the node toggle, the node itself doesn't.
type CardHeaderProps = {
  open: boolean;
  onToggle: () => void;
  title?: ReactNode;
  meta?: ReactNode;
  titleMenu?: ReactNode;
};
export const CardHeader = ({ open, onToggle, title, meta, titleMenu }: CardHeaderProps) => {
  const chevron = (
    <ChevronRight className={`h-4 w-4 shrink-0 text-muted-foreground transition-transform ${open ? 'rotate-90' : ''}`} />
  );
  const metaBlock = meta && <div className="flex shrink-0 items-center gap-2 text-xs text-muted-foreground">{meta}</div>;

  if (!titleMenu)
    return (
      <button
        type="button"
        onClick={onToggle}
        className="flex w-full items-center gap-2.5 px-3 py-2.5 text-left transition-colors hover:bg-muted"
      >
        {chevron}
        <span className="min-w-0 flex-1 truncate text-sm font-medium text-foreground">{title}</span>
        {metaBlock}
      </button>
    );

  return (
    <div className="flex w-full items-center gap-2.5 px-3 py-2.5 transition-colors hover:bg-muted">
      <button
        type="button"
        onClick={onToggle}
        aria-expanded={open}
        aria-label={open ? 'Collapse' : 'Expand'}
        className="flex shrink-0 items-center"
      >
        {chevron}
      </button>
      {titleMenu}
      <button type="button" onClick={onToggle} tabIndex={-1} aria-hidden className="h-6 min-w-0 flex-1" />
      {metaBlock}
    </div>
  );
};

export const CardBody = ({ children }: { children: ReactNode }) => (
  <div className="flex flex-col gap-1.5 border-t border-border bg-muted/30 p-2">{children}</div>
);

export const SubCard = ({ children }: { children: ReactNode }) => (
  <div className="overflow-hidden rounded-lg border border-border/50 bg-muted/20">{children}</div>
);

// A folder header. When `onToggle` is supplied it becomes a collapse control (chevron + clickable
// label); `action` stays a sibling so it never nests inside the toggle button.
type SubCardHeaderProps = {
  icon?: ReactNode;
  label: ReactNode;
  title?: string;
  meta?: ReactNode;
  action?: ReactNode;
  open?: boolean;
  onToggle?: () => void;
};
export const SubCardHeader = ({ icon, label, title, meta, action, open, onToggle }: SubCardHeaderProps) => {
  const inner = (
    <>
      {onToggle && (
        <ChevronRight className={`h-3 w-3 shrink-0 text-muted-foreground transition-transform ${open ? 'rotate-90' : ''}`} />
      )}
      {icon}
      <span className="min-w-0 flex-1 truncate text-xs text-muted-foreground" title={title}>
        {label}
      </span>
      {meta && <span className="shrink-0 text-xs text-muted-foreground">{meta}</span>}
    </>
  );
  return (
    <div className="flex items-center gap-2 bg-muted/30 px-2.5 py-1.5">
      {onToggle ? (
        <button
          type="button"
          onClick={onToggle}
          className="flex min-w-0 flex-1 items-center gap-2 text-left transition-colors hover:text-foreground"
        >
          {inner}
        </button>
      ) : (
        inner
      )}
      {action}
    </div>
  );
};

// File rows inside a SubCard, hairline-divided.
export const RowList = ({ children }: { children: ReactNode }) => (
  <div className="divide-y divide-border/50">{children}</div>
);

type PillProps = { active: boolean; onClick: () => void; children: ReactNode };
export const Pill = ({ active, onClick, children }: PillProps) => (
  <button
    type="button"
    onClick={onClick}
    className={`inline-flex items-center gap-1 rounded-full border px-2.5 py-1 text-xs transition ${
      active
        ? 'border-primary/40 bg-primary/10 text-primary'
        : 'border-border bg-muted/20 text-muted-foreground hover:bg-muted hover:text-foreground'
    }`}
  >
    {children}
  </button>
);