import React, { useState, useRef } from 'react';
import { Post, CurrentView } from '../types';
import { PlayIcon, PauseIcon } from './icons';
import { UI_TEXTS } from '../constants';
import { ViewMode } from './FilterSortBar';

interface PostCardProps {
  post: Post;
  isFeatured?: boolean;
  setCurrentView: (view: CurrentView) => void;
  setSelectedItemId: (id: string | null) => void;
  viewMode?: ViewMode;
}

const PostCard: React.FC<PostCardProps> = ({ post, isFeatured = false, setCurrentView, setSelectedItemId, viewMode = 'grid' }) => {
  const [isVideoPlaying, setIsVideoPlaying] = useState(false);
  const videoRef = useRef<HTMLVideoElement>(null);

  const toggleVideoPlay = (e: React.MouseEvent) => {
    e.stopPropagation(); // Prevent card click event when clicking video button
    if (videoRef.current) {
      if (videoRef.current.paused) {
        videoRef.current.play();
        setIsVideoPlaying(true);
      } else {
        videoRef.current.pause();
        setIsVideoPlaying(false);
      }
    }
  };

  const handleCardClick = () => {
    setCurrentView('blogPostDetail');
    setSelectedItemId(post.id);
  };
  
  if (viewMode === 'list' && !isFeatured) {
    return (
      <div 
        onClick={handleCardClick}
        className="group block p-4 rounded-lg bg-white transition-all duration-300 ease-in-out hover:bg-slate-50 cursor-pointer w-full"
        role="article"
        aria-labelledby={`post-title-${post.id}`}
      >
        <div className="flex items-start space-x-4">
          <div className="flex-shrink-0 w-24 h-24 md:w-28 md:h-28 rounded-md overflow-hidden bg-slate-200">
            <img 
              src={post.imageUrl} 
              alt={post.title}
              className="w-full h-full object-cover group-hover:scale-105 transition-transform duration-300 ease-in-out" 
              loading="lazy" 
            />
          </div>
          <div className="flex-1">
            <h3 id={`post-title-${post.id}`} className="text-base md:text-lg font-quicksand font-semibold text-slate-800 group-hover:text-black mb-1 transition-colors duration-200 leading-tight">
              {post.title}
            </h3>
            <div className="font-inter text-xs md:text-sm text-slate-500 mb-2">
              <span className="font-semibold text-slate-600">{post.category}</span>
              {(post.date || post.readTime) && <span className="mx-1.5">•</span>}
              {post.date && <span>{post.date}</span>}
              {post.date && post.readTime && <span className="mx-1.5">•</span>}
              {post.readTime && <span>{post.readTime}</span>}
            </div>
            {post.description && (
               <p className="text-sm text-slate-600 line-clamp-2 font-inter">{post.description}</p>
            )}
          </div>
        </div>
      </div>
    );
  }
  
  // Grid View (or Featured Card)
  const imageAspectRatio = isFeatured ? "aspect-[4/5] md:aspect-[16/9]" : "aspect-[1/1]";
  const titleSize = isFeatured ? "text-2xl md:text-3xl lg:text-4xl" : "text-xl md:text-lg";
  const scaleEffect = isFeatured ? "group-hover:scale-[1.0125]" : "group-hover:scale-[1.025]";

  return (
    <div 
      className={`group relative rounded-xl overflow-hidden transition-all duration-300 bg-white ${isFeatured ? 'flex flex-col' : ''} cursor-pointer shadow-sm hover:shadow-md`}
      onClick={handleCardClick}
      role="article"
      aria-labelledby={`post-title-${post.id}`}
    >
      <div className={`relative w-full overflow-hidden ${imageAspectRatio} ${scaleEffect} transition-transform duration-300`}>
        {post.videoUrl && !isFeatured ? (
          <>
            <video
              ref={videoRef}
              loop
              playsInline
              muted
              className="absolute inset-0 w-full h-full object-cover"
              poster={post.imageUrl}
              onPlay={() => setIsVideoPlaying(true)}
              onPause={() => setIsVideoPlaying(false)}
              onClick={(e) => e.stopPropagation()} // Prevent card click on video itself
            >
              <source src={post.videoUrl} type="video/mp4" />
              Your browser does not support the video tag.
            </video>
            <button
              onClick={toggleVideoPlay}
              className="absolute top-2 right-2 z-10 p-2 bg-black bg-opacity-50 rounded-full text-white hover:bg-opacity-75 transition-opacity"
              aria-label={isVideoPlaying ? UI_TEXTS.pauseVideoAriaLabel : UI_TEXTS.playVideoAriaLabel}
            >
              {isVideoPlaying ? <PauseIcon className="w-5 h-5" /> : <PlayIcon className="w-5 h-5" />}
            </button>
          </>
        ) : (
          <img
            src={post.imageUrl}
            alt={post.title}
            className="absolute inset-0 w-full h-full object-cover"
            loading="lazy"
          />
        )}
        <div className="absolute inset-0 bg-gradient-to-t from-black/50 via-transparent to-transparent opacity-0 group-hover:opacity-100 transition-opacity duration-300"></div>
      </div>
      <div className={`p-4 md:p-6 ${isFeatured ? 'flex-grow flex flex-col justify-between' : ''}`}>
        <div>
          <h3 id={`post-title-${post.id}`} className={`font-quicksand font-bold ${titleSize} mb-2 text-slate-800 transition-colors`}>
            {post.title} 
          </h3>
          {isFeatured && post.description && (
            <p className="font-inter text-sm md:text-base text-slate-600 mb-3 line-clamp-3">{post.description}</p>
          )}
           {!isFeatured && post.description && (
            <p className="font-inter text-sm text-slate-600 mb-3 line-clamp-2">{post.description}</p>
          )}
        </div>
        <div className="font-inter text-xs md:text-sm text-slate-500">
          <span className="font-semibold text-slate-600">{post.category}</span>
          {(post.date || post.readTime) && <span className="mx-1.5">•</span>}
          {post.date && <span>{post.date}</span>}
          {post.date && post.readTime && <span className="mx-1.5">•</span>}
          {post.readTime && <span>{post.readTime}</span>}
        </div>
      </div>
    </div>
  );
};

export default PostCard;