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

function num(v: number | string | null | undefined): number | null {
  if (v == null || v === "") return null;
  const n = typeof v === "string" ? Number(v) : v;
  return Number.isFinite(n) ? n : null;
}

function pct(v: number | string | null | undefined): number {
  const n = num(v);
  if (n == null) return 0;
  return Math.max(0, Math.min(5, n)) / 5 * 100;
}

export function MiniBars({
  usefulness,
  usability,
  className,
}: {
  usefulness: number | string | null | undefined;
  usability: number | string | null | undefined;
  className?: string;
}) {
  const rows = [
    { label: "Usefulness", value: usefulness },
    { label: "Usability", value: usability },
  ];
  return (
    <div className={cn("space-y-1 w-full", className)}>
      {rows.map(({ label, value }) => {
        const n = num(value);
        return (
          <div
            key={label}
            className="flex items-center gap-2"
            title={`${label}: ${n != null ? n.toFixed(1) : "N/A"} / 5`}
          >
            <span className="text-[10px] uppercase tracking-wide text-muted-foreground w-[3.5rem] shrink-0">
              {label}
            </span>
            <div className="flex-1 h-1.5 rounded-full bg-foreground/5 overflow-hidden">
              <div
                className="neon-bar h-full rounded-full"
                style={{ width: `${pct(value)}%` }}
              />
            </div>
            <span className="text-[10px] text-muted-foreground tabular-nums w-7 text-right shrink-0">
              {n != null ? n.toFixed(1) : "–"}
            </span>
          </div>
        );
      })}
    </div>
  );
}

export function MiniBarStack({
  usefulness,
  usability,
  className,
}: {
  usefulness: number | string | null | undefined;
  usability: number | string | null | undefined;
  className?: string;
}) {
  const u = num(usefulness);
  const a = num(usability);
  return (
    <div
      className={cn("h-1.5 w-16 rounded-full bg-foreground/5 overflow-hidden flex", className)}
      title={`Usefulness ${u != null ? u.toFixed(1) : "N/A"} / Usability ${
        a != null ? a.toFixed(1) : "N/A"
      } (of 5)`}
    >
      <div
        className="neon-bar h-full"
        style={{ width: `${pct(usefulness)}%` }}
      />
      <div
        className="neon-bar h-full opacity-60"
        style={{ width: `${pct(usability)}%` }}
      />
    </div>
  );
}