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

export interface ProgressProps {
  /** 0 to 100. Omitted, the bar runs indeterminate. */
  value?: number;
  /** Shows the percentage above the bar. Ignored when indeterminate. Default false. */
  showValue?: boolean;
  className?: string;
}

/** A progress bar that fills with scale, not width, so it stays cheap to animate. */
export function Progress({ value, showValue = false, className }: ProgressProps) {
  const clamped = value === undefined ? undefined : Math.min(100, Math.max(0, value));

  return (
    <div className={cn("flex flex-col gap-1.5", className)}>
      {showValue && clamped !== undefined ? (
        <span className="text-right text-xs tabular-nums text-muted-foreground">
          {Math.round(clamped)}%
        </span>
      ) : null}
      <div
        role="progressbar"
        aria-valuenow={clamped}
        aria-valuemin={0}
        aria-valuemax={100}
        className="h-2 w-full overflow-hidden rounded-full bg-muted shadow-[0_0_0_1px_var(--border)]"
      >
        <div
          className={cn(
            "h-full w-full origin-left rounded-full bg-foreground",
            clamped === undefined
              ? "scale-x-[0.4] animate-progress-indeterminate motion-reduce:animate-none"
              : "transition-transform duration-300 ease-out motion-reduce:transition-none",
          )}
          style={clamped === undefined ? undefined : { transform: `scaleX(${clamped / 100})` }}
        />
      </div>
    </div>
  );
}