import { Meter, type MeterTone } from "@/components/base/meter/meter";
import { formatUsd } from "@/app/lib/units";

/** Success under 85%, warning up to 100%, error over budget. */
function budgetTone(spent: number, budget: number): { tone: MeterTone; text: string; label: string } {
  const ratio = budget > 0 ? spent / budget : 0;
  if (ratio > 1) return { tone: "error", text: "text-status-danger", label: "Over budget" };
  if (ratio > 0.85) return { tone: "warning", text: "text-status-warn", label: "Close to budget" };
  return { tone: "success", text: "text-status-ok", label: "Under budget" };
}

interface BudgetMeterProps {
  spent: number;
  budget: number;
  compact?: boolean;
}

export function BudgetMeter({ spent, budget, compact = false }: BudgetMeterProps) {
  const tone = budgetTone(spent, budget);

  return (
    <div className={compact ? "w-full" : "w-full min-w-48"}>
      <div className="flex items-baseline justify-between gap-2">
        <span className={`text-body-medium tabular-nums ${tone.text}`}>{formatUsd(spent)}</span>
        <span className="text-caption-1-medium text-text-secondary tabular-nums">/ {formatUsd(budget)}</span>
      </div>
      <Meter
        className="mt-1.5"
        aria-label="Budget used"
        tone={tone.tone}
        minValue={0}
        maxValue={budget > 0 ? budget : 1}
        value={Math.min(spent, budget > 0 ? budget : 0)}
        valueLabel={`${formatUsd(spent)} of ${formatUsd(budget)}, ${tone.label.toLowerCase()}`}
      />
    </div>
  );
}