import { Footer } from '@/components/layout/Footer';
import { Header } from '@/components/layout/Header';
import JsonLd from '@/components/JsonLd';
import SkipLink from '@/components/SkipLink';
import AnalyticsShell from '@/components/analytics/AnalyticsShell';
import { Metadata, Viewport } from 'next';
import { NextIntlClientProvider } from 'next-intl';
import { getMessages } from 'next-intl/server';
import '../../styles/globals.css';
import { SITE_URL } from '@/lib/schema';
import FeedbackClientWrapper from '@/components/FeedbackClientWrapper';

import { setRequestLocale } from 'next-intl/server';
import { Inter } from 'next/font/google';
import { mapFileSlugToTranslated } from '@/lib/slugs';
import { cookies } from 'next/headers';

import { TransitionProvider } from '@/components/providers/TransitionProvider';

import { DynamicInitialLoader as InitialLoader } from '@/components/providers/DynamicInitialLoader';
import { DynamicMobileBottomNav as MobileBottomNav } from '@/components/layout/DynamicMobileBottomNav';

import { DynamicCorporateBackground as CorporateBackground } from '@/components/decorations/DynamicCorporateBackground';
const corporateBackground = null; // Removed to prevent line shifting

const inter = Inter({
  subsets: ['latin'],
  display: 'swap',
  variable: '--font-inter',
});

export async function generateMetadata(props: {
  params: Promise<{ locale: string }>;
}): Promise<Metadata> {
  const params = await props.params;
  const { locale } = params;

  const baseUrl = SITE_URL;

  return {
    title: {
      template: '%s | E-TIB',
      default: 'E-TIB | Die Experten für Kabelnetzbau',
    },
    description: 'Ihr Partner für Kabelleitungsnetzbau, Horizontalspülbohrungen, Planung und Vermessung in Guben und überregional.',
    metadataBase: new URL(baseUrl),
    manifest: '/manifest.webmanifest',
    alternates: {
      canonical: `/${locale}`,
      languages: {
        'de': `/de`,
        'en': `/en`,
        'x-default': `/de`,
      },
    },
  };
}

export const viewport: Viewport = {
  width: 'device-width',
  initialScale: 1,
  maximumScale: 5,
  userScalable: true,
  viewportFit: 'cover',
  themeColor: '#117c61',
};

export async function generateStaticParams() {
  return [{ locale: 'de' }, { locale: 'en' }];
}

export default async function Layout(props: {
  children: React.ReactNode;
  params: Promise<{ locale: string }>;
}) {
  const params = await props.params;
  const { locale } = params;
  const { children } = props;
  const supportedLocales = ['en', 'de'];
  const localeStr = (typeof locale === 'string' ? locale : '').trim();
  const safeLocale = supportedLocales.includes(localeStr) ? localeStr : 'en';

  setRequestLocale(safeLocale);
 
  let messages: Record<string, any> = {};
  try {
    messages = await getMessages();
  } catch (err) {
    console.error('[Layout] Failed to load messages:', err);
    messages = {};
  }
 
  const navLinks = [
    { 
      label: safeLocale === 'de' ? 'Kompetenzen' : 'Competencies', 
      url: `/${safeLocale}/${await mapFileSlugToTranslated('kompetenzen', safeLocale)}` 
    },
    { 
      label: safeLocale === 'de' ? 'Über uns' : 'About Us', 
      url: `/${safeLocale}/${await mapFileSlugToTranslated('ueber-uns', safeLocale)}`,
      children: [
        { label: safeLocale === 'de' ? 'Firma' : 'Company', url: `/${safeLocale}/${await mapFileSlugToTranslated('ueber-uns', safeLocale)}` },
        { label: safeLocale === 'de' ? 'Unser Team' : 'Our Team', url: `/${safeLocale}/team` },
        { label: safeLocale === 'de' ? 'Zertifikate' : 'Certificates', url: `/${safeLocale}/zertifikate` },
        { label: safeLocale === 'de' ? 'Standorte' : 'Locations', url: `/${safeLocale}/standorte` }
      ]
    },
    {
      label: safeLocale === 'de' ? 'Referenzen' : 'References',
      url: `/${safeLocale}/referenzen`
    },
    { 
      label: safeLocale === 'de' ? 'Karriere' : 'Career', 
      url: `/${safeLocale}/${safeLocale === 'de' ? 'karriere' : 'career'}` 
    },
    { 
      label: safeLocale === 'de' ? 'Messen' : 'Events', 
      url: `/${safeLocale}/${await mapFileSlugToTranslated('messen', safeLocale)}` 
    }
  ];
 
  const companyInfo = {
    contactEmail: 'info@e-tib.com',
    contactPhone: '+49 (0) 3561 / 68577 33',
    address: 'Gewerbestraße 22\n03172 Guben'
  };

  // Pick only the namespaces required by client components to reduce the hydration payload size
  const clientKeys = [
    'Footer',
    'Navigation',
    'Contact',
    'Products',
    'Team',
    'Home',
    'Error',
    'StandardPage',
    'Brochure',
    'JobListingBlock',
    'CallToAction',
    'InteractiveGermanyMap',
    'ReferencesSlider',
    'CompanyTimeline',
    'TeamGrid',
    'AISearch',
    'GrowthChart',
  ];
  const clientMessages: Record<string, any> = {};
  for (const key of clientKeys) {
    if (messages[key]) {
      clientMessages[key] = messages[key];
    }
  }

  const { getServerAppServices } = await import('@/lib/services/create-services.server');
  const serverServices = getServerAppServices();

  try {
    // Disable analytics in CI to prevent console noise/score penalties
    if (process.env.NEXT_PUBLIC_CI === 'true') {
      // Skip setting server context for analytics in CI
    }

    // Server-side analytics tracking removed to prevent duplicate/empty events.
    // Client-side AnalyticsProvider handles all pageviews.
  } catch {
    if (process.env.NODE_ENV !== 'production' || !process.env.CI) {
      console.warn(
        '[Layout] Static generation detected or headers unavailable, skipping server-side analytics context',
      );
    }
  }

  // Read directly from process.env — bypasses all abstraction to guarantee correctness
  const feedbackEnabled = process.env.NEXT_PUBLIC_FEEDBACK_ENABLED === 'true';
  const hasSeenLoader = true; // Disabled to allow static generation and instant LCP (Lighthouse 100)

  return (
    <html
      lang={safeLocale}
      className={`scroll-smooth overflow-x-hidden ${inter.variable}`}
      data-scroll-behavior="smooth"
      suppressHydrationWarning
    >
      <head>
        <link rel="icon" href="/favicon.ico" sizes="any" />
        <link rel="apple-touch-icon" href="/apple-icon.png" sizes="180x180" />

      </head>
      <body className="relative flex flex-col min-h-screen font-sans antialiased overflow-x-hidden selection:bg-primary/90 selection:text-white" suppressHydrationWarning>
        <NextIntlClientProvider messages={clientMessages} locale={safeLocale}>
          <TransitionProvider>
            <CorporateBackground />
            {!hasSeenLoader && <InitialLoader shouldShowLoader={!hasSeenLoader} />}
            {/* PageTransitionShutter loaded dynamically in TransitionProvider */}
            <SkipLink />
            <Header navLinks={navLinks} />
            <MobileBottomNav navLinks={navLinks} currentLocale={safeLocale} />
            
            <main
              id="main-content"
              className="flex-grow overflow-visible"
              tabIndex={-1}
            >
              {children}
            </main>

            <Footer companyInfo={companyInfo} />
            <JsonLd />
            <AnalyticsShell />

            <FeedbackClientWrapper />
          </TransitionProvider>
        </NextIntlClientProvider>
      </body>
    </html>
  );
}