import { cn } from "@/lib/utils";

/**
 * UI-Basisbausteine (Craftvia-CD): PageHead (Crumb/Titel/Sub + Aktionen), KPI-Kapsel,
 * Tag-Chip, Owner-Chip, Status-Pille. Farbe nie als einziges Statussignal — Pillen
 * tragen immer Text.
 */

export function PageHead({
  crumb,
  title,
  sub,
  actions,
}: {
  crumb: string;
  title: string;
  sub?: string;
  actions?: React.ReactNode;
}) {
  return (
    <div className="mb-4.5 flex flex-wrap items-end justify-between gap-4">
      <div>
        <div className="text-xs text-muted-foreground">{crumb}</div>
        <h1 className="text-[22px]">{title}</h1>
        {sub && <div className="mt-1 text-[13px] text-muted-foreground">{sub}</div>}
      </div>
      {actions && <div className="flex gap-2">{actions}</div>}
    </div>
  );
}

export function KpiCard({
  label,
  value,
  trend,
  trendColor = "muted",
}: {
  label: string;
  value: React.ReactNode;
  trend?: string;
  trendColor?: "muted" | "risk" | "warn" | "ok";
}) {
  const trendColors = {
    muted: "text-muted-foreground",
    risk: "text-[var(--risk)]",
    warn: "text-[var(--warn)]",
    ok: "text-[var(--ok)]",
  };
  return (
    <div className="shadow-card rounded-xl border bg-card p-4">
      <div className="text-[12.5px] font-semibold text-muted-foreground">{label}</div>
      <div className="mt-1.5 mb-0.5 font-heading text-3xl font-bold leading-none">{value}</div>
      {trend && <div className={cn("mt-1 text-xs font-semibold", trendColors[trendColor])}>{trend}</div>}
    </div>
  );
}

export function Tag({ children }: { children: React.ReactNode }) {
  return (
    <span className="inline-block rounded-md bg-[var(--muted)] px-2 py-0.5 text-[11px] font-bold text-muted-foreground">
      {children}
    </span>
  );
}

export function OwnerChip({ name, noOwnerLabel }: { name?: string | null; noOwnerLabel: string }) {
  if (!name) return <Pill tone="risk">{noOwnerLabel}</Pill>;
  const initials = name
    .split(/\s+/)
    .map((p) => p[0])
    .slice(0, 2)
    .join("")
    .toUpperCase();
  return (
    <span className="inline-flex items-center gap-2">
      <span className="grid size-6.5 place-items-center rounded-full bg-[var(--sidebar-accent)] font-heading text-[11px] font-bold text-[var(--primary)]">
        {initials}
      </span>
      {name}
    </span>
  );
}

// Status-Chips: ~12 % Alpha der Funktionsfarbe auf hellem Grund (Brandbook §11.4).
const PILL_TONES = {
  ok: "bg-[rgba(35,132,93,0.12)] text-[var(--ok)]",
  warn: "bg-[rgba(200,121,18,0.12)] text-[var(--warn)]",
  orange: "bg-[rgba(255,106,0,0.12)] text-[#b34a00]",
  risk: "bg-[rgba(198,66,66,0.12)] text-[var(--risk)]",
  info: "bg-[rgba(47,111,163,0.12)] text-[var(--info)]",
  mut: "bg-[rgba(102,114,125,0.12)] text-muted-foreground",
  violet: "bg-[rgba(8,46,91,0.1)] text-[var(--primary)]",
} as const;

export function Pill({
  tone,
  children,
}: {
  tone: keyof typeof PILL_TONES;
  children: React.ReactNode;
}) {
  return (
    <span
      className={cn(
        "inline-flex items-center gap-1.5 rounded-full px-2.5 py-[3px] text-[11.5px] font-bold whitespace-nowrap",
        PILL_TONES[tone]
      )}
    >
      {children}
    </span>
  );
}

export function SectTitle({ title, sub }: { title: string; sub?: string }) {
  return (
    <div>
      <div className="font-heading text-[15px] font-semibold">{title}</div>
      {sub && <div className="mt-0.5 text-[12.5px] text-muted-foreground">{sub}</div>}
    </div>
  );
}