import type { Metadata } from "next";
import { siteConfig } from "@/data/site-content";

type PageMetadataInput = {
  title: string;
  description: string;
  path: string;
  image?: string;
};

type FaqEntry = {
  question: string;
  answer: string;
};

type ItemListEntry = {
  name: string;
  path?: string;
};

export function buildMetadataBase() {
  const rawUrl = process.env.NEXT_PUBLIC_SITE_URL || siteConfig.siteUrl;

  return new URL(rawUrl.endsWith("/") ? rawUrl : `${rawUrl}/`);
}

export function buildAbsoluteUrl(path: string) {
  return new URL(path, buildMetadataBase()).toString();
}

export function buildPageMetadata({
  title,
  description,
  path,
  image = siteConfig.defaultOgImage,
}: PageMetadataInput): Metadata {
  return {
    title,
    description,
    alternates: {
      canonical: path,
    },
    openGraph: {
      title,
      description,
      url: path,
      images: [
        {
          url: image,
          alt: title,
        },
      ],
    },
    twitter: {
      card: "summary_large_image",
      title,
      description,
      images: [image],
    },
  };
}

export function websiteSchema() {
  return {
    "@type": "WebSite",
    name: siteConfig.name,
    url: buildAbsoluteUrl("/"),
  };
}

export function businessSchema() {
  return {
    "@type": "LocalBusiness",
    name: siteConfig.name,
    url: buildAbsoluteUrl("/"),
    description: siteConfig.description,
    logo: buildAbsoluteUrl(siteConfig.brand.primaryLogo),
    image: buildAbsoluteUrl(siteConfig.defaultOgImage),
    telephone: siteConfig.phoneDisplay,
    address: {
      "@type": "PostalAddress",
      streetAddress: siteConfig.address.street,
      addressLocality: "Corpus Christi",
      addressRegion: "TX",
      postalCode: "78405",
      addressCountry: "US",
    },
    sameAs: siteConfig.socials.map((social) => social.href),
    contactPoint: [
      {
        "@type": "ContactPoint",
        telephone: siteConfig.phoneDisplay,
        contactType: "customer service",
        areaServed: "Corpus Christi, TX",
      },
    ],
    openingHoursSpecification: [
      {
        "@type": "OpeningHoursSpecification",
        dayOfWeek: ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"],
        opens: "08:00",
        closes: "17:00",
      },
    ],
  };
}

export function localBusinessSchema() {
  return {
    "@context": "https://schema.org",
    ...businessSchema(),
  };
}

export function breadcrumbSchema(items: { name: string; path: string }[]) {
  return {
    "@context": "https://schema.org",
    "@type": "BreadcrumbList",
    itemListElement: items.map((item, index) => ({
      "@type": "ListItem",
      position: index + 1,
      name: item.name,
      item: buildAbsoluteUrl(item.path),
    })),
  };
}

export function faqPageSchema(items: FaqEntry[]) {
  return {
    "@context": "https://schema.org",
    "@type": "FAQPage",
    mainEntity: items.map((item) => ({
      "@type": "Question",
      name: item.question,
      acceptedAnswer: {
        "@type": "Answer",
        text: item.answer,
      },
    })),
  };
}

export function itemListSchema({
  name,
  path,
  items,
}: {
  name: string;
  path: string;
  items: ItemListEntry[];
}) {
  return {
    "@context": "https://schema.org",
    "@type": "ItemList",
    name,
    url: buildAbsoluteUrl(path),
    numberOfItems: items.length,
    itemListOrder: "https://schema.org/ItemListOrderAscending",
    itemListElement: items.map((item, index) => ({
      "@type": "ListItem",
      position: index + 1,
      name: item.name,
      url: item.path ? buildAbsoluteUrl(item.path) : undefined,
    })),
  };
}