import { useQuery } from '@tanstack/react-query';
import { Link, useLocation } from 'wouter';
import { ArrowLeft, ChevronLeft, ChevronRight, Menu, X } from 'lucide-react';
import VideoCard from '@/components/video-card';
import BunnyVideoModal from '@/components/bunny-video-modal';
import { Button } from '@/components/ui/button';
import { useState, useEffect } from 'react';
import type { Video } from '@shared/schema';
import { Input } from '@/components/ui/input';
import { Search } from 'lucide-react';

export default function GeschichteLiedPage() {
  const [selectedVideo, setSelectedVideo] = useState<Video | null>(null);
  const [isModalOpen, setIsModalOpen] = useState(false);
  const [currentPage, setCurrentPage] = useState(1);
  const [isMobileMenuOpen, setIsMobileMenuOpen] = useState(false);
  const [searchQuery, setSearchQuery] = useState("");
  const [viewMode, setViewMode] = useState<"grid" | "list">("grid");
  const [, setLocation] = useLocation();
  const [touchStart, setTouchStart] = useState<number>(0);
  const [touchEnd, setTouchEnd] = useState<number>(0);
  const itemsPerPage = 10;

  const { data, isLoading } = useQuery<{videos: Video[], total: number}>({
    queryKey: ['/api/videos?limit=200'],
    select: (response) => response || { videos: [], total: 0 }
  });

  const videos = data?.videos || [];

  // Filter all Die Geschichte des Liedes videos
  const geschichteVideos = videos.filter(video => 
    video.title.includes("Die Geschichte des Liedes") || 
    video.title.includes("Geschichte des Liedes") ||
    video.title.includes("GESCHICHTE DES LIEDES")
  );

  // Pagination logic
  const totalPages = Math.ceil(geschichteVideos.length / itemsPerPage);
  const startIndex = (currentPage - 1) * itemsPerPage;
  const endIndex = startIndex + itemsPerPage;
  const currentVideos = geschichteVideos.slice(startIndex, endIndex);

  const handleVideoClick = (video: Video) => {
    // Navigate to individual video page instead of modal
    const shortId = video.id.replace(/-/g, '').substring(0, 8);
    setLocation(`/video/${shortId}`);
  };

  const handleCloseModal = () => {
    setIsModalOpen(false);
    setSelectedVideo(null);
  };

  // Touch handlers for swipe navigation
  const handleTouchStart = (e: React.TouchEvent) => {
    setTouchEnd(0);
    setTouchStart(e.targetTouches[0].clientX);
  };

  const handleTouchMove = (e: React.TouchEvent) => {
    e.preventDefault();
    setTouchEnd(e.targetTouches[0].clientX);
  };

  const handleTouchEnd = () => {
    if (!touchStart || !touchEnd) return;
    
    const distance = touchStart - touchEnd;
    const isLeftSwipe = distance > 30;
    const isRightSwipe = distance < -30;
    
    if (isLeftSwipe && currentPage < totalPages) {
      setCurrentPage(currentPage + 1);
    }
    if (isRightSwipe && currentPage > 1) {
      setCurrentPage(currentPage - 1);
    }
  };

  if (isLoading) {
    return (
      <div className="min-h-screen bg-bunny-dark flex items-center justify-center">
        <div className="text-center">
          <div className="w-16 h-16 bg-[#da234d] rounded-lg flex items-center justify-center shadow-lg animate-pulse mb-4 mx-auto">
            <div className="w-0 h-0 border-l-[12px] border-l-white border-y-[9px] border-y-transparent ml-1"></div>
          </div>
          <h3 className="text-white text-xl font-bold mb-2">video.folx.tv</h3>
          <p className="text-bunny-light">Loading GESCHICHTE DES LIEDES...</p>
        </div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-bunny-dark text-white has-fixed-header">
      {/* Header */}
      <div className="header-sticky bg-transparent overflow-hidden">
        <div className="container py-6">
          <div className="flex items-center justify-between">
            {/* Left side - Logo */}
            <div className="flex items-center space-x-6 flex-1">
              <Link href="/" className="flex items-center space-x-3 hover:opacity-80 transition-opacity py-4">
                <div className="w-10 h-10 bg-[#da234d] rounded-lg flex items-center justify-center shadow-lg">
                  <div className="w-0 h-0 border-l-[11px] border-l-white border-y-[8px] border-y-transparent ml-1"></div>
                </div>
                <h1 className="text-2xl font-bold text-white tracking-wide">video.folx.tv</h1>
              </Link>
            </div>

            {/* Right side - Navigation + Search */}
            <div className="flex items-center gap-4">
              {/* Desktop navigation */}
              <div className="hidden md:flex items-center space-x-6">
                <nav className="flex space-x-6">
                  <Link href="/" className="relative text-bunny-light hover:text-white transition-colors group">
                    Startseite
                    <span className="absolute bottom-0 left-0 w-0 h-0.5 bg-[#da234d] transition-all duration-300 group-hover:w-full"></span>
                  </Link>
                  <Link href="/folx-stadl" className="relative text-bunny-light hover:text-white transition-colors group">
                    FOLX STADL
                    <span className="absolute bottom-0 left-0 w-0 h-0.5 bg-[#da234d] transition-all duration-300 group-hover:w-full"></span>
                  </Link>
                  <Link href="/geschichte-lied" className="relative text-bunny-light hover:text-white transition-colors group">
                    DIE GESCHICHTE DES LIEDES
                    <span className="absolute bottom-0 left-0 w-0 h-0.5 bg-[#da234d] transition-all duration-300 group-hover:w-full"></span>
                  </Link>
                  <Link href="/gipfelstammtisch" className="relative text-bunny-light hover:text-white transition-colors group">
                    GIPFELSTAMMTISCH
                    <span className="absolute bottom-0 left-0 w-0 h-0.5 bg-[#da234d] transition-all duration-300 group-hover:w-full"></span>
                  </Link>
                </nav>
                
                <div className="relative">
                  <Input
                    type="search"
                    placeholder="Suchen..."
                    value={searchQuery}
                    onChange={(e) => setSearchQuery(e.target.value)}
                    className="bg-white border border-gray-300 rounded-lg px-4 py-1.5 pl-10 text-sm text-gray-900 placeholder-gray-500 focus:outline-none focus:border-[#da234d] transition-colors w-56"
                  />
                  <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400 w-4 h-4" />
                </div>
              </div>

              {/* Mobile menu button */}
              <button
                onClick={() => setIsMobileMenuOpen(!isMobileMenuOpen)}
                className="md:hidden p-2 rounded-lg bg-white/10 hover:bg-white/20 transition-colors"
                data-testid="button-mobile-menu"
              >
                {isMobileMenuOpen ? (
                  <X className="w-6 h-6 text-white" />
                ) : (
                  <Menu className="w-6 h-6 text-white" />
                )}
              </button>
            </div>
          </div>
        </div>

        {/* Mobile menu dropdown */}
        {isMobileMenuOpen && (
          <div className="md:hidden border-t border-white/20 bg-bunny-dark/95 backdrop-blur-md">
            <div className="px-6 py-4">
              {/* Navigation Section */}
              <div className="mb-6">
                <h3 className="text-white text-xs font-semibold uppercase tracking-wider mb-3 opacity-70">Navigation</h3>
                <nav className="flex flex-col space-y-4">
                  <Link 
                    href="/" 
                    className="text-bunny-light hover:text-white transition-colors font-medium py-1 border-l-2 border-transparent hover:border-[#da234d] pl-3"
                    onClick={() => setIsMobileMenuOpen(false)}
                  >
                    Startseite
                  </Link>
                  <Link 
                    href="/folx-stadl" 
                    className="text-bunny-light hover:text-white transition-colors font-medium py-1 border-l-2 border-transparent hover:border-[#da234d] pl-3"
                    onClick={() => setIsMobileMenuOpen(false)}
                  >
                    FOLX STADL
                  </Link>
                  <Link 
                    href="/geschichte-lied" 
                    className="text-bunny-light hover:text-white transition-colors font-medium py-1 border-l-2 border-transparent hover:border-[#da234d] pl-3"
                    onClick={() => setIsMobileMenuOpen(false)}
                  >
                    DIE GESCHICHTE DES LIEDES
                  </Link>
                  <Link 
                    href="/gipfelstammtisch" 
                    className="text-bunny-light hover:text-white transition-colors font-medium py-1 border-l-2 border-transparent hover:border-[#da234d] pl-3"
                    onClick={() => setIsMobileMenuOpen(false)}
                  >
                    GIPFELSTAMMTISCH
                  </Link>
                </nav>
              </div>
              
              {/* Separator */}
              <div className="border-t border-white/10 mb-4"></div>
              
              {/* Search Section */}
              <div>
                <h3 className="text-white text-xs font-semibold uppercase tracking-wider mb-3 opacity-70">Suchen</h3>
                <div className="relative">
                  <Input
                    type="search"
                    placeholder="Suchen..."
                    value={searchQuery}
                    onChange={(e) => setSearchQuery(e.target.value)}
                    className="bg-white/10 border border-white/20 rounded-lg px-4 py-2.5 pl-10 text-sm text-white placeholder-white/60 focus:outline-none focus:border-[#da234d] focus:bg-white/15 transition-all w-full"
                  />
                  <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-white/60 w-4 h-4" />
                </div>
              </div>
            </div>
          </div>
        )}
      </div>

      {/* Main Content */}
      <div 
        className="container pt-8 pb-8"
        onTouchStart={handleTouchStart}
        onTouchMove={handleTouchMove}
        onTouchEnd={handleTouchEnd}
      >

        {/* Video List with Descriptions */}
        <div className="space-y-6">
          {currentVideos.map((video, index) => (
            <div key={video.id} className="bg-black/20 backdrop-blur-sm rounded-lg p-4">
              <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
                {/* Video Card */}
                <div className="md:col-span-1">
                  <VideoCard
                    video={video}
                    onClick={handleVideoClick}
                    className="w-full hover:scale-102 transition-all duration-300 rounded-lg overflow-hidden"
                    hideOverlay={true}
                  />
                </div>
                
                {/* Video Description */}
                <div className="md:col-span-2 space-y-3">
                  <h3 className="text-xl font-bold text-white">{video.title}</h3>
                  <p className="text-bunny-light text-sm leading-relaxed">
                    {video.description || "Keine Beschreibung für diese Sendung verfügbar."}
                  </p>
                  <div className="flex items-center gap-4 text-xs text-bunny-muted">
                    <span>{Math.floor(video.duration / 60)}:{(video.duration % 60).toString().padStart(2, '0')} min</span>
                    <span>{video.views} Aufrufe</span>
                  </div>
                </div>
              </div>
            </div>
          ))}

          {geschichteVideos.length === 0 && (
            <div className="text-center py-16">
              <p className="text-bunny-muted text-lg">Keine "Die Geschichte des Liedes" Videos gefunden</p>
            </div>
          )}
        </div>

        {/* Bottom Pagination */}
        {totalPages > 1 && (
          <div className="mt-8 flex justify-center gap-1 px-4 overflow-x-auto">
            {Array.from({ length: Math.min(totalPages, 5) }, (_, i) => {
                let pageNum;
                if (totalPages <= 5) {
                  pageNum = i + 1;
                } else if (currentPage <= 3) {
                  pageNum = i + 1;
                } else if (currentPage >= totalPages - 2) {
                  pageNum = totalPages - 4 + i;
                } else {
                  pageNum = currentPage - 2 + i;
                }
                
                return (
                  <Button
                    key={pageNum}
                    variant={currentPage === pageNum ? "default" : "outline"}
                    size="sm"
                    onClick={() => setCurrentPage(pageNum)}
                    className={currentPage === pageNum 
                      ? "bg-[#da234d] text-white border-none shadow-lg h-10 w-10 p-0 flex items-center justify-center" 
                      : "border-white/20 text-white hover:bg-white/10 h-10 w-10 p-0 flex items-center justify-center"
                    }
                  >
                    {pageNum}
                  </Button>
                );
              })}
          </div>
        )}
      </div>

      {/* Footer */}
      <footer className="bg-bunny-dark/90 border-t border-white/10 py-8 mt-12">
        <div className="container">
          <div className="flex flex-col items-center justify-center space-y-4">
            {/* Logo */}
            <div className="flex items-center space-x-2">
              <div className="w-8 h-8 bg-[#da234d] rounded-lg flex items-center justify-center shadow-lg">
                <div className="w-0 h-0 border-l-[8px] border-l-white border-y-[6px] border-y-transparent ml-1 drop-shadow-sm"></div>
              </div>
              <h3 className="text-xl font-bold text-white">video.folx.tv</h3>
            </div>
            
            {/* Legal Links */}
            <div className="flex items-center space-x-6 text-sm">
              <Link href="/impressum" className="text-bunny-muted hover:text-white transition-colors">
                Impressum
              </Link>
              <Link href="/privacy" className="text-bunny-muted hover:text-white transition-colors">
                Datenschutz
              </Link>
              <Link href="/terms" className="text-bunny-muted hover:text-white transition-colors">
                Nutzungsbedingungen
              </Link>
            </div>
            
            {/* Copyright */}
            <p className="text-bunny-muted text-sm text-center">
              © 2025 video.folx.tv. Alle Rechte vorbehalten.
            </p>
          </div>
        </div>
      </footer>

      {/* Video Modal */}
      {selectedVideo && (
        <BunnyVideoModal
          video={selectedVideo}
          isOpen={isModalOpen}
          onClose={handleCloseModal}
        />
      )}
    </div>
  );
}