frontend/src/components/ContentRow.tsx

import React, { useState, useRef, useEffect } from 'react';
import ContentCard from './ContentCard';
import { ChevronLeft, ChevronRight } from 'lucide-react';

interface ContentItem {
  type: 'movie' | 'tvshow';
  title: string;
  image: string;
  description?: string;
  genre?: string[];
  year?: number | string;
}

interface ContentRowProps {
  title: string;
  items: ContentItem[];
}

const ContentRow: React.FC<ContentRowProps> = ({ title, items }) => {
  const rowRef = useRef<HTMLDivElement>(null);
  const [showLeftButton, setShowLeftButton] = useState(false);
  const [showRightButton, setShowRightButton] = useState(true);
  
  // Handle scroll events to show/hide buttons
  const handleScroll = () => {
    if (rowRef.current) {
      const { scrollLeft, scrollWidth, clientWidth } = rowRef.current;
      setShowLeftButton(scrollLeft > 20);
      setShowRightButton(scrollLeft < scrollWidth - clientWidth - 20);
    }
  };

  // Set up scroll listeners and initial state
  useEffect(() => {
    handleScroll();
    window.addEventListener('resize', handleScroll);
    return () => window.removeEventListener('resize', handleScroll);
  }, [items]);
  
  const scroll = (direction: 'left' | 'right') => {
    if (rowRef.current) {
      const card = rowRef.current.querySelector('.card-hover');
      const cardWidth = card ? card.clientWidth + 16 : 280; // Card width + margin
      const scrollAmount = direction === 'left' ? -cardWidth * 3 : cardWidth * 3;
      rowRef.current.scrollBy({ left: scrollAmount, behavior: 'smooth' });
    }
  };

  // Don't render the row if there are no items
  if (items.length === 0) {
    return null;
  }

  return (
    <div className="content-row mb-8">
      <h2 className="text-xl font-bold px-4 md:px-8 mb-4">{title}</h2>
      
      <div className="relative group">
        {/* Left scroll button */}
        <button 
          onClick={() => scroll('left')}
          className={`absolute left-2 top-1/2 transform -translate-y-1/2 z-30 
            bg-black/40 hover:bg-black/60 rounded-full p-2 transition-all duration-200
            ${showLeftButton ? 'opacity-100' : 'opacity-0 pointer-events-none'}`}
          aria-label="Scroll left"
        >
          <ChevronLeft className="w-6 h-6 text-white" />
        </button>
        
        {/* Content row */}
        <div 
          ref={rowRef}
          onScroll={handleScroll}
          className="flex gap-4 overflow-x-auto py-4 px-4 md:px-8 scrollbar-none scroll-smooth"
          style={{ scrollbarWidth: 'none' }}
        >
          {items.map((item, index) => (
            <div key={`${item.title}-${index}`} className="flex-shrink-0">
              <ContentCard 
                type={item.type}
                title={item.title}
                image={item.image}
                description={item.description}
                genre={item.genre}
                year={item.year}
              />
            </div>
          ))}
        </div>
        
        {/* Right scroll button */}
        <button 
          onClick={() => scroll('right')}
          className={`absolute right-2 top-1/2 transform -translate-y-1/2 z-30 
            bg-black/40 hover:bg-black/60 rounded-full p-2 transition-all duration-200
            ${showRightButton ? 'opacity-100' : 'opacity-0 pointer-events-none'}`}
          aria-label="Scroll right"
        >
          <ChevronRight className="w-6 h-6 text-white" />
        </button>
      </div>
    </div>
  );
};

export default ContentRow;