import type { Metadata } from "next";
import { englishPortfolioContent, getPortfolioContent, sharedProfile, type Language } from "@/data/portfolio";
import { absoluteUrl, siteName } from "@/data/site-config";

const primaryEnglishName = sharedProfile.founderNameEn;
const fullEnglishName = sharedProfile.fullNameEn;
const englishAlternateNames = sharedProfile.alternateNamesEn;
const arabicName = sharedProfile.founderNameAr;

const sharedKeywords = [
  "Grace Salmoun",
  "Grace Butrus Salmoun",
  "Grace Salamoun",
  "architecture portfolio",
  "architectural engineer",
  "architectural design",
  "urban rehabilitation",
  "landscape design",
  "shop drawings",
  "architectural visualization",
  "Damascus architect",
];

const localizedKeywords: Record<Language, string[]> = {
  en: ["portfolio architect", "presentation boards", "mixed-use towers", "hospitality design"],
  ar: ["بورتفوليو معماري", "مهندسة معمارية", "تصميم معماري", "إعادة تأهيل عمراني"],
};

function getLocale(language: Language) {
  return language === "ar" ? "ar_SY" : "en_US";
}

function getAlternateLocales(language: Language) {
  return language === "ar" ? ["en_US"] : ["ar_SY"];
}

function getHomePath(language: Language) {
  return language === "ar" ? "/ar" : "/";
}

function getResumePath(language: Language) {
  return language === "ar" ? "/ar/resume" : "/resume";
}

function getOgImage(language: Language) {
  return {
    url: absoluteUrl(sharedProfile.heroImage),
    alt:
      language === "ar"
        ? "معاينة بورتفوليو غريس سلمون"
        : "Portfolio preview for Grace Salmoun",
  };
}

function buildMetadata({
  language,
  title,
  description,
  canonicalPath,
  pageType,
}: {
  language: Language;
  title: string;
  description: string;
  canonicalPath: string;
  pageType: "website" | "profile";
}): Metadata {
  const ogImage = getOgImage(language);

  return {
    title,
    description,
    keywords: [...sharedKeywords, ...localizedKeywords[language]],
    authors: [{ name: primaryEnglishName }],
    creator: primaryEnglishName,
    publisher: primaryEnglishName,
    category: "architecture portfolio",
    alternates: {
      canonical: canonicalPath,
      languages: {
        en: canonicalPath.includes("/resume") ? "/resume" : "/",
        ar: canonicalPath.includes("/resume") ? "/ar/resume" : "/ar",
        "x-default": "/",
      },
    },
    robots: {
      index: true,
      follow: true,
      googleBot: {
        index: true,
        follow: true,
        "max-image-preview": "large",
        "max-snippet": -1,
        "max-video-preview": -1,
      },
    },
    openGraph: {
      title,
      description,
      url: absoluteUrl(canonicalPath),
      siteName,
      locale: getLocale(language),
      alternateLocale: getAlternateLocales(language),
      type: pageType,
      images: [ogImage],
    },
    twitter: {
      card: "summary_large_image",
      title,
      description,
      images: [ogImage.url],
    },
  };
}

export function getDefaultSeoMetadata(): Metadata {
  const title = englishPortfolioContent.meta.title;
  const description = englishPortfolioContent.meta.description;
  const ogImage = getOgImage("en");

  return {
    title,
    description,
    applicationName: siteName,
    authors: [{ name: primaryEnglishName }],
    creator: primaryEnglishName,
    publisher: primaryEnglishName,
    keywords: [...sharedKeywords, ...localizedKeywords.en],
    category: "architecture portfolio",
    referrer: "origin-when-cross-origin",
    robots: {
      index: true,
      follow: true,
      googleBot: {
        index: true,
        follow: true,
        "max-image-preview": "large",
        "max-snippet": -1,
        "max-video-preview": -1,
      },
    },
    openGraph: {
      title,
      description,
      url: absoluteUrl("/"),
      siteName,
      locale: "en_US",
      alternateLocale: ["ar_SY"],
      type: "website",
      images: [ogImage],
    },
    twitter: {
      card: "summary_large_image",
      title,
      description,
      images: [ogImage.url],
    },
  };
}

export function getHomeMetadata(language: Language): Metadata {
  const t = getPortfolioContent(language);

  return buildMetadata({
    language,
    title: t.meta.title,
    description: t.meta.description,
    canonicalPath: getHomePath(language),
    pageType: "website",
  });
}

export function getResumeMetadata(language: Language): Metadata {
  const t = getPortfolioContent(language);
  const title = language === "ar" ? `السيرة الذاتية | ${t.meta.title}` : `Resume | ${t.meta.title}`;

  return buildMetadata({
    language,
    title,
    description: t.resume.description,
    canonicalPath: getResumePath(language),
    pageType: "profile",
  });
}

export function getHomeStructuredData(language: Language) {
  const t = getPortfolioContent(language);
  const name = language === "ar" ? sharedProfile.founderNameAr : sharedProfile.founderNameEn;
  const address = language === "ar" ? sharedProfile.addressAr : sharedProfile.address;

  return [
    {
      "@context": "https://schema.org",
      "@type": "WebSite",
      name: siteName,
      alternateName: [`${fullEnglishName} Portfolio`, "Grace Salamoun Portfolio"],
      url: absoluteUrl("/"),
      inLanguage: ["en", "ar"],
    },
    {
      "@context": "https://schema.org",
      "@type": "Person",
      name,
      givenName: "Grace",
      additionalName: "Butrus",
      familyName: "Salmoun",
      alternateName: language === "ar" ? [primaryEnglishName, fullEnglishName, ...englishAlternateNames] : [fullEnglishName, arabicName, ...englishAlternateNames],
      url: absoluteUrl(getHomePath(language)),
      image: absoluteUrl(sharedProfile.heroImage),
      jobTitle: t.ui.architectureEngineer,
      description: t.meta.description,
      email: sharedProfile.email,
      telephone: sharedProfile.phone,
      address: {
        "@type": "PostalAddress",
        addressLocality: address,
        addressCountry: "SY",
      },
      sameAs: [sharedProfile.facebookHref],
      knowsAbout: [...t.craft.skills.slice(0, 4), ...t.sectors.categories.slice(0, 4)],
    },
    {
      "@context": "https://schema.org",
      "@type": "CollectionPage",
      name: t.meta.title,
      description: t.meta.description,
      url: absoluteUrl(getHomePath(language)),
      inLanguage: language,
      isPartOf: {
        "@type": "WebSite",
        name: siteName,
        url: absoluteUrl("/"),
      },
      about: {
        "@type": "Person",
        name,
      },
    },
  ];
}

export function getResumeStructuredData(language: Language) {
  const t = getPortfolioContent(language);
  const name = language === "ar" ? sharedProfile.founderNameAr : sharedProfile.founderNameEn;
  const title = language === "ar" ? `السيرة الذاتية | ${name}` : `Resume | ${name}`;

  const person = {
    "@context": "https://schema.org",
    "@type": "Person",
    name,
    givenName: "Grace",
    additionalName: "Butrus",
    familyName: "Salmoun",
    alternateName:
      language === "ar"
        ? [primaryEnglishName, fullEnglishName, ...englishAlternateNames]
        : [fullEnglishName, arabicName, ...englishAlternateNames],
    url: absoluteUrl(getHomePath(language)),
    email: sharedProfile.email,
    telephone: sharedProfile.phone,
    image: absoluteUrl(sharedProfile.heroImage),
    jobTitle: t.ui.architectureEngineer,
    sameAs: [sharedProfile.facebookHref],
  };

  return [
    person,
    {
      "@context": "https://schema.org",
      "@type": "ProfilePage",
      name: title,
      description: t.resume.description,
      url: absoluteUrl(getResumePath(language)),
      inLanguage: language,
      isPartOf: {
        "@type": "WebSite",
        name: siteName,
        url: absoluteUrl("/"),
      },
      mainEntity: person,
      about: person,
    },
  ];
}