export function formatTokens(count: number | null | undefined): string {
	if (count === null || count === undefined || !Number.isFinite(count)) return "?";
	const abs = Math.abs(count);
	if (abs < 1000) return `${Math.round(count)}`;
	if (abs < 10_000) return `${(count / 1000).toFixed(1)}k`;
	if (abs < 1_000_000) return `${Math.round(count / 1000)}k`;
	if (abs < 10_000_000) return `${(count / 1_000_000).toFixed(1)}M`;
	return `${Math.round(count / 1_000_000)}M`;
}

export function formatPercent(percent: number | null | undefined): string {
	if (percent === null || percent === undefined || !Number.isFinite(percent)) return "?";
	return percent >= 10 ? `${percent.toFixed(0)}%` : `${percent.toFixed(1)}%`;
}

export function formatCost(cost: number): string {
	if (!Number.isFinite(cost) || cost <= 0) return "$0.000";
	if (cost < 0.001) return "<$0.001";
	if (cost < 1) return `$${cost.toFixed(3)}`;
	if (cost < 10) return `$${cost.toFixed(2)}`;
	return `$${cost.toFixed(1)}`;
}