import type { Metadata } from "next";

interface MetaProps {
  title?: string;
  description?: string;
  keywords?: string;
  image?: string;
  url?: string;
  type?: string;
}

export function generateMetadata({
  title = "Confessions of Grace",
  description = "A blog dedicated to exploring the doctrines of grace and Reformed theology.",
  keywords = "reformed theology, doctrines of grace, christianity, calvinism, theology",
  image = "/images/og-default.jpg",
  url = "https://confessionsofgrace.com",
  type = "website",
}: MetaProps = {}): Metadata {
  const siteTitle =
    title === "Confessions of Grace"
      ? "Confessions of Grace | Confessing Christ. Rejoicing in Grace."
      : `${title} | Confessions of Grace`;

  const fullImageUrl = image.startsWith("http")
    ? image
    : `https://confessionsofgrace.com${image}`;

  return {
    title: siteTitle,
    description,
    keywords,
    openGraph: {
      type: type as any,
      url,
      title: siteTitle,
      description,
      images: [
        {
          url: fullImageUrl,
          alt: title || "Confessions of Grace",
        },
      ],
      locale: "en_US",
      siteName: "Confessions of Grace",
    },
    twitter: {
      card: "summary_large_image",
      title: siteTitle,
      description,
      images: [fullImageUrl],
    },
    alternates: {
      canonical: url,
    },
  };
}

// Default metadata for the site
export const defaultMetadata: Metadata = generateMetadata();

// Helper function for pages that need custom metadata
export function createPageMetadata(props: MetaProps): Metadata {
  return generateMetadata(props);
}