// i18n.jsx — Locale detection, dictionaries, slug routing for Saloria.
// Loaded before every other Saloria script. Exposes window.SaloriaI18n.
//
// Locale is detected from the URL path: /it/, /es/, /fr/, /en/, /pt/.
// Fallback is 'it' (Italian source). Each helper accepts an optional locale.

(function () {
  const LOCALES = ["it", "es", "fr", "en", "pt"];
  const DEFAULT_LOCALE = "it";

  function detectLocale() {
    if (typeof window === "undefined") return DEFAULT_LOCALE;
    const m = window.location.pathname.match(/^\/(it|es|fr|en|pt)(\/|$)/i);
    return m ? m[1].toLowerCase() : DEFAULT_LOCALE;
  }

  // ── Page slug map ────────────────────────────────────────────────────────
  // Each main page has a localized slug per locale. Keys are stable IDs.
  const PAGE_SLUGS = {
    home:          { it: "",                  es: "",                   fr: "",                   en: "",                  pt: "" },
    pricing:       { it: "pricing",           es: "precios",            fr: "tarifs",             en: "pricing",           pt: "precos" },
    salesFlow:     { it: "inizia-subito",     es: "empezar-ahora",      fr: "commencer",          en: "start-now",         pt: "comecar-agora" },
    contact:       { it: "contatti",          es: "contacto",           fr: "contact",            en: "contact",           pt: "contato" },
    howItWorks:    { it: "come-funziona",     es: "como-funciona",      fr: "comment-ca-marche",  en: "how-it-works",      pt: "como-funciona" },
    aiAnalysis:    { it: "analisi-ai",        es: "analisis-ai",        fr: "analyse-ai",         en: "ai-analysis",       pt: "analise-ai" },
    capabilities:  { it: "capabilities",      es: "funcionalidades",    fr: "fonctionnalites",    en: "capabilities",      pt: "funcionalidades" },
    blog:          { it: "blog",              es: "blog",               fr: "blog",               en: "blog",              pt: "blog" },
    login:         { it: "login",             es: "login",              fr: "login",              en: "login",             pt: "login" },
    resourcesHub:  { it: "risorse/",          es: "recursos/",          fr: "ressources/",        en: "resources/",        pt: "recursos/" },
  };

  const RESOURCES_FOLDER = {
    it: "risorse", es: "recursos", fr: "ressources", en: "resources", pt: "recursos",
  };

  // ── UI labels (header, footer, buttons, breadcrumbs) ─────────────────────
  const UI = {
    nav: {
      home:        { it: "Home",           es: "Inicio",         fr: "Accueil",         en: "Home",          pt: "Início" },
      aiAnalysis:  { it: "Analisi AI",     es: "Análisis IA",    fr: "Analyse IA",      en: "AI Analysis",   pt: "Análise IA" },
      howItWorks:  { it: "Come funziona",  es: "Cómo funciona",  fr: "Comment ça marche", en: "How it works", pt: "Como funciona" },
      pricing:     { it: "Pricing",        es: "Precios",        fr: "Tarifs",          en: "Pricing",       pt: "Preços" },
      contact:     { it: "Contatti",       es: "Contacto",       fr: "Contact",         en: "Contact",       pt: "Contato" },
      bookDemo:    { it: "Prenota una demo", es: "Reserva una demo", fr: "Réserver une démo", en: "Book a demo", pt: "Agendar uma demo" },
    },
    footer: {
      tagline:     {
        it: "L'AI Beauty Advisor per saloni d'autore. Made in Italy.",
        es: "El AI Beauty Advisor para salones de autor. Made in Italy.",
        fr: "L'AI Beauty Advisor pour salons d'auteur. Made in Italy.",
        en: "The AI Beauty Advisor for signature salons. Made in Italy.",
        pt: "O AI Beauty Advisor para salões autorais. Made in Italy.",
      },
      product:     { it: "Prodotto", es: "Producto", fr: "Produit", en: "Product", pt: "Produto" },
      salon:       { it: "Salone",   es: "Salón",    fr: "Salon",   en: "Salon",   pt: "Salão" },
      contact:     { it: "Contatti", es: "Contacto", fr: "Contact", en: "Contact", pt: "Contato" },
      resources:   { it: "Risorse",  es: "Recursos", fr: "Ressources", en: "Resources", pt: "Recursos" },
      bookDemo:    { it: "Prenota demo", es: "Reserva demo", fr: "Réserver une démo", en: "Book demo", pt: "Agendar demo" },
      partnerLogin:{ it: "Login partner", es: "Login partner", fr: "Login partenaire", en: "Partner login", pt: "Login parceiro" },
      onboarding:  { it: "Onboarding", es: "Onboarding", fr: "Onboarding", en: "Onboarding", pt: "Onboarding" },
      systemStatus:{ it: "Stato sistema", es: "Estado del sistema", fr: "État du système", en: "System status", pt: "Status do sistema" },
      requestDemo: { it: "Richiedi demo", es: "Solicitar demo", fr: "Demander une démo", en: "Request a demo", pt: "Solicitar demo" },
      salonSupport:{ it: "Supporto saloni", es: "Soporte a salones", fr: "Support salons", en: "Salon support", pt: "Suporte a salões" },
      copyright:   {
        it: "© SALORIA 2025 · TUTTI I DIRITTI RISERVATI",
        es: "© SALORIA 2025 · TODOS LOS DERECHOS RESERVADOS",
        fr: "© SALORIA 2025 · TOUS DROITS RÉSERVÉS",
        en: "© SALORIA 2025 · ALL RIGHTS RESERVED",
        pt: "© SALORIA 2025 · TODOS OS DIREITOS RESERVADOS",
      },
      vatLine:     {
        it: "P.IVA 12867410969 · SALORIA CLOUD",
        es: "P.IVA 12867410969 · SALORIA CLOUD",
        fr: "P.IVA 12867410969 · SALORIA CLOUD",
        en: "VAT 12867410969 · SALORIA CLOUD",
        pt: "NIF 12867410969 · SALORIA CLOUD",
      },
    },
    languageSwitcher: {
      label: { it: "Lingua", es: "Idioma", fr: "Langue", en: "Language", pt: "Idioma" },
      flags: {
        it: { code: "IT", name: "Italiano" },
        es: { code: "ES", name: "Español"  },
        fr: { code: "FR", name: "Français" },
        en: { code: "EN", name: "English"  },
        pt: { code: "PT", name: "Português" },
      },
    },
    common: {
      readMore:    { it: "Continua a leggere", es: "Sigue leyendo",     fr: "Lire la suite",      en: "Read more", pt: "Continuar lendo" },
      backToHome:  { it: "Torna alla home",    es: "Volver al inicio",  fr: "Retour à l'accueil", en: "Back to home", pt: "Voltar ao início" },
      backToHub:   { it: "Torna alle risorse", es: "Volver a recursos", fr: "Retour aux ressources", en: "Back to resources", pt: "Voltar aos recursos" },
      bookDemo:    { it: "Prenota una demo",   es: "Reserva una demo",  fr: "Réserver une démo",  en: "Book a demo", pt: "Agendar uma demo" },
      newsletter:  { it: "Newsletter",         es: "Newsletter",         fr: "Newsletter",          en: "Newsletter", pt: "Newsletter" },
    },
  };

  // ── HTML lang attribute / OG locale / JSON-LD inLanguage ─────────────────
  const META_LANG = {
    htmlLang:    { it: "it",     es: "es",     fr: "fr",     en: "en",     pt: "pt-BR" },
    inLanguage:  { it: "it-IT",  es: "es-ES",  fr: "fr-FR",  en: "en-US",  pt: "pt-BR" },
    ogLocale:    { it: "it_IT",  es: "es_ES",  fr: "fr_FR",  en: "en_US",  pt: "pt_BR" },
  };

  // ── Helpers ──────────────────────────────────────────────────────────────
  function t(dict, locale) {
    locale = locale || detectLocale();
    if (!dict) return "";
    return dict[locale] || dict[DEFAULT_LOCALE] || "";
  }

  // Build absolute URL for a logical page in a given locale.
  // pageKey: 'home' | 'pricing' | 'contact' | ...
  function pageHref(pageKey, locale) {
    locale = locale || detectLocale();
    const slug = (PAGE_SLUGS[pageKey] || {})[locale];
    if (slug == null) return "/" + locale + "/";
    return "/" + locale + "/" + slug;
  }

  // Build absolute URL for a resource article. articleSlug is locale-specific.
  function articleHref(articleSlug, locale) {
    locale = locale || detectLocale();
    return "/" + locale + "/" + RESOURCES_FOLDER[locale] + "/" + String(articleSlug || "");
  }

  function resourcesHubHref(locale) {
    locale = locale || detectLocale();
    return "/" + locale + "/" + RESOURCES_FOLDER[locale] + "/";
  }

  // Switch the *current* URL to the equivalent URL in another locale.
  // For main pages we recognise the slug and map it across locales.
  function switchLocaleHref(targetLocale) {
    if (typeof window === "undefined") return "/" + targetLocale + "/";
    const path = window.location.pathname;
    const current = detectLocale();
    // Main page detection: /xx/<slug>
    const m = path.match(/^\/(it|es|fr|en|pt)\/([^/]*)$/i);
    if (m) {
      const file = m[2];
      // find which pageKey produced this slug for the current locale
      for (const key of Object.keys(PAGE_SLUGS)) {
        if ((PAGE_SLUGS[key][current] || "") === file) {
          return pageHref(key, targetLocale);
        }
      }
      // unknown file → fall through to locale root
      return "/" + targetLocale + "/";
    }
    // Resource hub: /xx/<folder>/
    const hub = path.match(/^\/(it|es|fr|en|pt)\/(risorse|recursos|ressources|resources)\/?$/i);
    if (hub) return resourcesHubHref(targetLocale);
    // Resource article: /xx/<folder>/<slug>
    const art = path.match(/^\/(it|es|fr|en|pt)\/(risorse|recursos|ressources|resources)\/([^/]+?)$/i);
    if (art) {
      // We don't have a synchronous slug map for 168 articles here.
      // Fallback: send to localized resources hub. Article-level cross-links
      // are rendered with hreflang <link> in each article's <head> so search
      // engines still discover the localized equivalents.
      return resourcesHubHref(targetLocale);
    }
    return "/" + targetLocale + "/";
  }

  const SaloriaI18n = {
    LOCALES, DEFAULT_LOCALE, PAGE_SLUGS, RESOURCES_FOLDER, UI, META_LANG,
    detectLocale, t, pageHref, articleHref, resourcesHubHref, switchLocaleHref,
  };

  if (typeof window !== "undefined") {
    window.SaloriaI18n = SaloriaI18n;
    // Persist the current locale so /Nginx and the Accept-Language fallback
    // respect the user's last-visited locale on their next hit to "/".
    try {
      const locale = detectLocale();
      document.cookie = "saloria_locale=" + locale + "; path=/; max-age=31536000; SameSite=Lax";
    } catch (_) {}
  }
})();