/* ── Settings Page Helpers ── */

import type { PortalSettings } from "@/lib/storage";

export function formatStorageMB(mb: number): string {
  if (mb >= 1024) return (mb / 1024).toFixed(0) + " GB";
  return mb + " MB";
}

export function inputCls(field: string, validation: Record<string, string | null>): string {
  return `w-full rounded-lg bg-surface-900 border ${
    validation[field] ? "border-accent-rose/50" : "border-surface-700"
  } px-3 py-2 text-sm text-surface-200 placeholder:text-surface-500 focus:outline-none focus:border-brand-500 focus:ring-1 focus:ring-brand-500 transition-colors`;
}

export function validateSettings(
  form: PortalSettings,
): { valid: boolean; errors: Record<string, string | null> } {
  const errors: Record<string, string | null> = {};
  let valid = true;

  if (!form.gatewayUrl.startsWith("http://") && !form.gatewayUrl.startsWith("https://")) {
    errors.gatewayUrl = "Must start with http:// or https://";
    valid = false;
  }
  if (form.gatewayUrl.length > 500) {
    errors.gatewayUrl = "Too long (max 500 chars)";
    valid = false;
  }
  if (form.apiEndpoint && !form.apiEndpoint.startsWith("/") && !form.apiEndpoint.startsWith("http")) {
    errors.apiEndpoint = "Must be empty, a path (/…), or a URL";
    valid = false;
  }
  if (form.storageMax < 1 || form.storageMax > 102400) {
    errors.storageMax = "Must be 1–102400 MB";
    valid = false;
  }
  if (form.refreshInterval < 5 || form.refreshInterval > 300) {
    errors.refreshInterval = "Must be 5–300 seconds";
    valid = false;
  }

  return { valid, errors };
}