import { notFound, redirect } from 'next/navigation';
import { Container, Badge, Heading } from '@/components/ui';
import { getTranslations, setRequestLocale } from 'next-intl/server';
import { Metadata } from 'next';
import { getPageBySlug } from '@/lib/pages';
import { mapSlugToFileSlug, mapFileSlugToTranslated } from '@/lib/slugs';
import { MDXRemote } from 'next-mdx-remote/rsc';
import { SITE_URL } from '@/lib/schema';
import TrackedLink from '@/components/analytics/TrackedLink';
import { getButtonClasses, ButtonOverlay } from '@/components/ui/Button';
import { getAllReferences } from '@/lib/references';
import { defaultLocations, minorLocations } from '@/lib/map-data';

// Import components used in MDX
import { HeroVideo as HomeHero } from '@/components/blocks/HeroVideo';
import { SubCompanyTiles as HomeSubCompanyTiles } from '@/components/blocks/SubCompanyTiles';
import { CompetenceBentoGrid as HomeCompetenceBentoGrid } from '@/components/blocks/CompetenceBentoGrid';
import { ReferencesSlider as HomeReferencesSlider } from '@/components/blocks/ReferencesSlider';
import { CompanyTimeline } from '@/components/blocks/CompanyTimeline';
import { JobListingBlock } from '@/components/blocks/JobListingBlock';
import { CallToAction } from '@/components/blocks/CallToAction';
import { ServiceDetailGrid } from '@/components/blocks/ServiceDetailGrid';
import { BenefitGrid } from '@/components/blocks/BenefitGrid';
import { InteractiveGermanyMap } from '@/components/blocks/InteractiveGermanyMap';
import { FaqBlock } from '@/components/blocks/FaqBlock';
import { CertificatesBlock } from '@/components/blocks/CertificatesBlock';
import { HeroSection } from '@/components/blocks/HeroSection';
import { TeamGrid } from '@/components/blocks/TeamGrid';
import { DeepDrillAnimation } from '@/components/blocks/DeepDrillAnimation';
import { DataGridPulse } from '@/components/blocks/DataGridPulse';
import { GrowthChart } from '@/components/blocks/GrowthChart';
import JsonLd from '@/components/JsonLd';
import { Button } from '@/components/ui/Button';
import { AnimatedCounter } from '@/components/ui';


const mdxComponents = {
  HomeHero,
  HomeSubCompanyTiles,
  HomeCompetenceBentoGrid,
  HomeReferencesSlider,
  CompanyTimeline,
  JobListingBlock,
  CallToAction,
  ServiceDetailGrid,
  BenefitGrid,
  InteractiveGermanyMap,
  FaqBlock,
  CertificatesBlock,
  HeroSection,
  TeamGrid,
  JsonLd,
  Button,
  AnimatedCounter,
  GrowthChart,
  DeepDrillAnimation,
  DataGridPulse,
  // Standard HTML element mapping for consistent E-TIB typography
  h1: (props: any) => <Heading level={1} size="2" className="hidden" {...props} />, // Hidden because Hero handles H1
  h2: (props: any) => <Heading level={2} size="3" className="mt-16 mb-6 border-b border-neutral-100 pb-4" {...props} />,
  h3: (props: any) => <Heading level={3} size="4" className="mt-12 mb-4 text-primary" {...props} />,
  h4: (props: any) => <Heading level={4} size="5" className="mt-8 mb-4 uppercase tracking-widest text-neutral-500" {...props} />,
  p: (props: any) => <p className="text-base md:text-lg text-text-secondary leading-[1.8] mb-6 font-medium max-w-3xl" {...props} />,
  ul: (props: any) => <ul className="list-none mb-8 space-y-3 text-base md:text-lg text-text-secondary font-medium max-w-3xl" {...props} />,
  ol: (props: any) => <ol className="list-decimal pl-6 mb-8 space-y-3 text-base md:text-lg text-text-secondary font-medium max-w-3xl" {...props} />,
  li: (props: any) => (
    <li className="relative pl-6 before:content-[''] before:absolute before:left-0 before:top-[0.6em] before:w-2 before:h-2 before:bg-primary/50 before:rounded-sm" {...props} />
  ),
  a: (props: any) => <a className="text-primary hover:text-primary-dark underline decoration-primary/30 underline-offset-4 hover:decoration-primary transition-all font-bold" {...props} />,
  strong: (props: any) => <strong className="font-bold text-neutral-900" {...props} />,
  blockquote: (props: any) => (
    <blockquote className="border-l-4 border-primary pl-6 py-3 my-10 italic bg-neutral-50 rounded-r-2xl text-neutral-700 font-medium max-w-3xl shadow-sm" {...props} />
  ),
  hr: (props: any) => <hr className="my-16 border-t-2 border-neutral-100 max-w-3xl" {...props} />,
  img: (props: any) => <img className="rounded-2xl shadow-2xl my-12 max-w-full h-auto border border-neutral-100" {...props} />,
};

interface PageProps {
  params: Promise<{
    locale: string;
    slug: string;
  }>;
}

export async function generateMetadata({ params }: PageProps): Promise<Metadata> {
  const { locale, slug } = await params;
  
  // Guard against invalid locales
  if (locale !== 'de' && locale !== 'en') return {};

  const pageData = await getPageBySlug(slug, locale);

  if (!pageData) return {};

  const fileSlug = await mapSlugToFileSlug(pageData.slug || slug, locale);
  const deSlug = await mapFileSlugToTranslated(fileSlug, 'de');
  const enSlug = await mapFileSlugToTranslated(fileSlug, 'en');

  // Determine correct localized slug based on current locale
  const currentLocaleSlug = locale === 'de' ? deSlug : enSlug;

  return {
    title: pageData.frontmatter.title,
    description: pageData.frontmatter.excerpt || '',
    alternates: {
      canonical: `${SITE_URL}/${locale}/${currentLocaleSlug}`,
      languages: {
        de: `${SITE_URL}/de/${deSlug}`,
        en: `${SITE_URL}/en/${enSlug}`,
        'x-default': `${SITE_URL}/en/${enSlug}`,
      },
    },
    openGraph: {
      title: `${pageData.frontmatter.title} | E-TIB`,
      description: pageData.frontmatter.excerpt || '',
      url: `${SITE_URL}/${locale}/${currentLocaleSlug}`,
    },
    twitter: {
      card: 'summary_large_image',
      title: `${pageData.frontmatter.title} | E-TIB`,
      description: pageData.frontmatter.excerpt || '',
    },
  };
}

export default async function Page(props: { params: Promise<{ locale: string; slug: string }> }) {
  const { locale, slug } = await props.params;
  
  // Guard against invalid locales (e.g. favicon.ico) hitting the DB
  if (locale !== 'de' && locale !== 'en') {
    notFound();
  }
  
  setRequestLocale(locale);
  const pageData = await getPageBySlug(slug, locale);
  const t = await getTranslations('StandardPage');

  if (!pageData) {
    notFound();
  }

  // Redirect logic removed to simplify for now, as slugs match file names
  /*
  const fileSlug = await mapSlugToFileSlug(pageData.slug || slug, locale);
  const correctSlug = await mapFileSlugToTranslated(fileSlug, locale);
  if (correctSlug && correctSlug !== slug) {
    redirect(`/${locale}/${correctSlug}`);
  }
  */

  // Determine layout type
  const isFullBleed = pageData.frontmatter.layout === 'fullBleed';

  // Fetch references to enrich the map if it's used
  const references = await getAllReferences(locale);
  const allLocations = [...defaultLocations, ...minorLocations];
  const enrichedLocations = allLocations.map(loc => {
    if (loc.type === 'project') {
      const ref = references.find(r => r.slug === loc.id);
      if (ref) {
        return {
          ...loc,
          featuredImage: ref.frontmatter.featuredImage,
          details: [
            ref.frontmatter.client || t('client'),
            ref.frontmatter.dateString || new Date(ref.frontmatter.date).getFullYear().toString(),
          ],
        };
      }
    }
    return loc;
  });

  const pageMdxComponents = {
    ...mdxComponents,
    InteractiveGermanyMap: (props: any) => <InteractiveGermanyMap locations={enrichedLocations} {...props} />,
    HomeReferencesSlider: (props: any) => <HomeReferencesSlider {...props} references={references.map(r => ({
      id: r.slug,
      slug: r.slug,
      title: r.frontmatter.title,
      category: Array.isArray(r.frontmatter.category) ? r.frontmatter.category[0] : (r.frontmatter.category || 'Projekt'),
      image: r.frontmatter.featuredImage
    }))} />,
  };

  return (
    <div className={`flex flex-col min-h-screen ${isFullBleed ? '' : 'bg-white'}`}>
      {/* Generic Hero Section (only for standard pages) */}
      {!isFullBleed && (
        <section className="bg-primary-dark text-white pt-40 pb-12 md:pt-56 md:pb-16 min-h-[40vh] md:min-h-[45vh] flex flex-col justify-end relative overflow-hidden">
          <div className="absolute inset-0 opacity-20 pointer-events-none">
            <div className="absolute top-0 left-0 w-full h-full bg-[radial-gradient(circle_at_center,_var(--tw-gradient-stops))] from-accent/50 via-transparent to-transparent" />
          </div>
          <Container className="relative z-10">
            <div className="max-w-4xl">
              <Badge variant="accent" className="mb-4 md:mb-6 shadow-sm">
                {t('badge')}
              </Badge>
              <Heading level={1} variant="white" className="mb-0 drop-shadow-sm">
                {pageData.frontmatter.title}
              </Heading>
            </div>
          </Container>
        </section>
      )}

      {/* Main Content Area */}
      {isFullBleed ? (
        <div className="w-full">
          <MDXRemote source={pageData.content} components={pageMdxComponents} />
        </div>
      ) : (
        <Container className="py-16 md:py-24">
          {/* Excerpt/Lead paragraph if available */}
          {pageData.frontmatter.excerpt && (
            <div className="mb-16 max-w-4xl mx-auto">
              <p className="text-xl md:text-2xl text-text-primary leading-relaxed font-medium border-l-4 border-primary pl-8 py-2 italic">
                {pageData.frontmatter.excerpt}
              </p>
            </div>
          )}

          {/* Main content */}
          <div className="max-w-4xl mx-auto">
            <div className="prose prose-lg md:prose-xl prose-neutral max-w-none prose-headings:font-heading prose-headings:font-bold prose-headings:tracking-tight prose-h1:text-4xl prose-h2:text-3xl prose-h2:mt-12 prose-h2:border-b prose-h2:border-neutral-200 prose-h2:pb-4 prose-h3:text-2xl prose-p:text-text-secondary prose-p:leading-relaxed prose-a:text-primary prose-a:font-medium prose-a:underline prose-a:underline-offset-4 prose-a:decoration-primary/30 hover:prose-a:decoration-primary prose-strong:text-text-primary prose-strong:font-semibold prose-li:text-text-secondary prose-ul:list-disc prose-ol:list-decimal">
              <MDXRemote source={pageData.content} components={pageMdxComponents} />
            </div>
          </div>
        </Container>
      )}

      {/* Support Section */}
      <Container>
        <div className="mt-24 mb-24 p-8 md:p-12 bg-primary-dark rounded-3xl text-white shadow-2xl relative overflow-hidden group animate-slight-fade-in-from-bottom">
          <div className="absolute top-0 right-0 w-64 h-full bg-accent/5 -skew-x-12 translate-x-1/2 transition-transform group-hover:translate-x-1/3" />
          <div className="relative z-10 max-w-2xl">
            <h3 className="text-2xl md:text-3xl font-bold mb-4">{t('needHelp')}</h3>
            <p className="text-lg text-white/70 mb-8">{t('supportTeamAvailable')}</p>
            <TrackedLink
              href={`/${locale}/${locale === 'de' ? 'kontakt' : 'contact'}`}
              className={getButtonClasses('accent', 'lg')}
              eventProperties={{
                location: 'generic_page_support_cta',
                page_slug: slug,
              }}
            >
              <span className="relative z-10 flex items-center justify-center gap-2 transition-colors duration-500 group-hover/btn:text-primary-dark">
                {t('contactUs')}
                <span className="ml-2 transition-transform group-hover/btn:translate-x-1">
                  &rarr;
                </span>
              </span>
              <ButtonOverlay variant="accent" />
            </TrackedLink>
          </div>
        </div>
      </Container>
    </div>
  );
}