// The ecomm UI kit — React faces of the app.css primitives, matching the Claude Design
// export (ui/designs/ecomm-login-and-create-storefront-designs, hf-kit). Presentation
// only: no business rules live here (§6.2 — the SPA renders what the BFF returns).
import { useId } from "react";
import type { ReactNode } from "react";

export function Screen({
  children,
  horizon = false,
  plain = false,
}: {
  children: ReactNode;
  horizon?: boolean;
  plain?: boolean;
}) {
  const cls = plain ? "screen screen--plain" : horizon ? "screen screen--horizon" : "screen";
  return <div className={cls}>{children}</div>;
}

export function TopBar({ left, right }: { left: ReactNode; right?: ReactNode }) {
  return (
    <header className="topbar">
      <div className="topbar__side">{left}</div>
      <div className="topbar__side">{right}</div>
    </header>
  );
}

export function Wordmark({ size = 26 }: { size?: number }) {
  return (
    <span className="wordmark">
      <img src="/brand/mark-tile.svg" width={size} height={size} alt="" />
      <span className="wordmark__name" style={{ fontSize: size * 0.86 }}>
        ecomm
      </span>
    </span>
  );
}

export function Footer() {
  return (
    <footer className="footer">
      <span className="footer__id">
        <img src="/brand/mark-mono-gold.svg" width={16} height={16} alt="" />
        ecomm · a Wiggleverse line
      </span>
    </footer>
  );
}

export function AuthCard({ children }: { children: ReactNode }) {
  return <div className="card">{children}</div>;
}

export function Eyebrow({ children }: { children: ReactNode }) {
  return <p className="eyebrow">{children}</p>;
}

export function Banner({
  tone = "attn",
  title,
  children,
}: {
  tone?: "attn" | "info";
  title?: string;
  children: ReactNode;
}) {
  return (
    <div className={`banner banner--${tone}`} role={tone === "attn" ? "alert" : "status"}>
      <span className="banner__icon" aria-hidden="true">
        {tone === "attn" ? "◆" : "◇"}
      </span>
      <div>
        {title && <div className="banner__title">{title}</div>}
        {children}
      </div>
    </div>
  );
}

export function PrimaryButton({
  children,
  busy = false,
  disabled = false,
  type = "submit",
  onClick,
}: {
  children: ReactNode;
  busy?: boolean;
  disabled?: boolean;
  type?: "submit" | "button";
  onClick?: () => void;
}) {
  return (
    <button className="btn-primary" type={type} disabled={disabled || busy} onClick={onClick}>
      {children}
    </button>
  );
}

export function Field({
  label,
  optional = false,
  error,
  helper,
  inputProps,
}: {
  label: string;
  optional?: boolean;
  error?: string | null;
  helper?: string;
  inputProps: React.InputHTMLAttributes<HTMLInputElement>;
}) {
  const id = useId();
  return (
    <div className="field">
      <label className="field__label" htmlFor={id}>
        <span>{label}</span>
        {optional && <span className="field__optional">optional</span>}
      </label>
      <input
        id={id}
        className={`field__input${error ? " field__input--error" : ""}`}
        aria-invalid={!!error}
        {...inputProps}
      />
      {error && (
        <p className="note note--attn" role="alert">
          {error}
        </p>
      )}
      {helper && !error && <p className="note">{helper}</p>}
    </div>
  );
}

export function AccountChip({ email, onSignOut }: { email: string; onSignOut: () => void }) {
  return (
    <div className="chip">
      <span className="chip__avatar" aria-hidden="true">
        {email[0]?.toUpperCase()}
      </span>
      <span className="chip__email">{email}</span>
      <span className="chip__divider" aria-hidden="true" />
      <button type="button" className="signout" onClick={onSignOut}>
        Sign out
      </button>
    </div>
  );
}