import "server-only";
import { prisma } from "@/lib/db";
import { getEffectivePlan } from "@/lib/billing/subscription";

export interface ActiveBranding {
  brandName: string | null;
  logoUrl: string | null;
  primaryColor: string | null; // hex (#rrggbb)
  removePoweredBy: boolean;
}

/**
 * Resolve the white-label branding that should apply to the current request.
 * Only returns branding when an organization is active AND its plan includes
 * the `custom_branding` feature AND a branding row exists. Otherwise null
 * (the default Podcast Distribution AI look).
 */
export async function getActiveBranding(
  userId: string,
  activeOrgId?: string | null
): Promise<ActiveBranding | null> {
  if (!activeOrgId) return null;
  const { plan } = await getEffectivePlan(userId, activeOrgId);
  if (!plan.features.includes("custom_branding")) return null;

  const b = await prisma.orgBranding.findUnique({ where: { organizationId: activeOrgId } });
  if (!b) return null;
  return {
    brandName: b.brandName,
    logoUrl: b.logoUrl,
    primaryColor: b.primaryColor,
    removePoweredBy: b.removePoweredBy,
  };
}

/**
 * Convert a #rrggbb hex color to an `"H S% L%"` triplet for the `--brand` CSS
 * variable (the app's accent is consumed as `hsl(var(--brand))`). Returns null
 * for anything that isn't a valid 6-digit hex.
 */
export function hexToHslTriplet(hex: string | null | undefined): string | null {
  if (!hex) return null;
  const m = /^#?([0-9a-fA-F]{6})$/.exec(hex.trim());
  if (!m) return null;
  const int = parseInt(m[1], 16);
  const r = ((int >> 16) & 255) / 255;
  const g = ((int >> 8) & 255) / 255;
  const b = (int & 255) / 255;

  const max = Math.max(r, g, b);
  const min = Math.min(r, g, b);
  const l = (max + min) / 2;
  let h = 0;
  let s = 0;
  if (max !== min) {
    const d = max - min;
    s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
    switch (max) {
      case r:
        h = (g - b) / d + (g < b ? 6 : 0);
        break;
      case g:
        h = (b - r) / d + 2;
        break;
      default:
        h = (r - g) / d + 4;
    }
    h /= 6;
  }
  return `${Math.round(h * 360)} ${Math.round(s * 100)}% ${Math.round(l * 100)}%`;
}