import React, { useRef, useState } from 'react';
import { useTranslation } from 'react-i18next';
import { API_URL, toggleVideoLike, isLoggedIn } from '../utils/api';
import { buildContentShareUrl, tryNativeShare } from '../utils/nativeShare';
import { ContentType } from '../types/api';
import LoginPromptModal from './LoginPromptModal';

interface ContentCardSocialActionsProps {
  videoId: number;
  /**
   * 콘텐츠 종류. video.id 와 ssul_content.id 가 겹치므로 좋아요 API 와
   * 공유 URL(/video/{id} vs /ssul/{id}) 분기에 반드시 필요하다.
   */
  contentType?: ContentType;
  storeName: string;
  region?: string;
  commentCount: number;
  initialLikeCount: number;
  initialIsLiked?: boolean;
}

const ContentCardSocialActions: React.FC<ContentCardSocialActionsProps> = ({
  videoId,
  contentType = 'video',
  storeName,
  region,
  commentCount,
  initialLikeCount,
  initialIsLiked = false,
}) => {
  const { t } = useTranslation();

  const [likeCount, setLikeCount] = useState(initialLikeCount);
  const [isLiked, setIsLiked] = useState(initialIsLiked);
  const [showLoginModal, setShowLoginModal] = useState(false);
  const likeDebounceRef = useRef<ReturnType<typeof setTimeout> | null>(null);

  const shareUrl = buildContentShareUrl(API_URL, videoId, contentType);
  const shareTitle = storeName || t('videoDetail.kakaoDefaultTitle');
  const shareDescription = t('videoDetail.kakaoDescription', { region: region ?? '' });

  const handleShareBtnClick = async (e: React.MouseEvent) => {
    e.stopPropagation();

    const handled = await tryNativeShare({
      title: shareTitle,
      text: shareDescription,
      url: shareUrl,
    });
    if (handled) {
      return;
    }

    try {
      await navigator.clipboard.writeText(shareUrl);
    } catch {
      // clipboard API 미지원 환경에서는 무시
    }
  };

  const handleLikeClick = (e: React.MouseEvent) => {
    e.stopPropagation();

    if (!isLoggedIn()) {
      setShowLoginModal(true);
      return;
    }

    const prevLiked = isLiked;
    const prevCount = likeCount;

    setIsLiked(!prevLiked);
    setLikeCount(prevLiked ? prevCount - 1 : prevCount + 1);

    if (likeDebounceRef.current) clearTimeout(likeDebounceRef.current);
    likeDebounceRef.current = setTimeout(async () => {
      try {
        const res = await toggleVideoLike(String(videoId), contentType);
        setIsLiked(res.is_liked);
        setLikeCount(res.like_count);
      } catch (err) {
        console.error('Failed to toggle like:', err);
        setIsLiked(prevLiked);
        setLikeCount(prevCount);
      }
    }, 500);
  };

  return (
    <div className="content-card-social" onClick={(e) => e.stopPropagation()}>
      <button
        className={`content-card-like-btn ${isLiked ? 'liked' : ''}`}
        onClick={handleLikeClick}
      >
        <svg width="15" height="15" viewBox="0 0 24 24" fill={isLiked ? 'currentColor' : 'none'} stroke="currentColor" strokeWidth="2">
          <path d="M20.84 4.61a5.5 5.5 0 0 0-7.78 0L12 5.67l-1.06-1.06a5.5 5.5 0 0 0-7.78 7.78l1.06 1.06L12 21.23l7.78-7.78 1.06-1.06a5.5 5.5 0 0 0 0-7.78z" />
        </svg>
        {likeCount}
      </button>

      <span className="content-card-comment">
        <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
          <path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z" />
        </svg>
        {commentCount}
      </span>

      <button
        className="content-card-share-btn"
        onClick={handleShareBtnClick}
        title={t('videoDetail.share')}
      >
        <svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
          <circle cx="18" cy="5" r="3" /><circle cx="6" cy="12" r="3" /><circle cx="18" cy="19" r="3" />
          <line x1="8.59" y1="13.51" x2="15.42" y2="17.49" /><line x1="15.41" y1="6.51" x2="8.59" y2="10.49" />
        </svg>
      </button>

      {showLoginModal && (
        <LoginPromptModal onClose={() => setShowLoginModal(false)} />
      )}
    </div>
  );
};

export default ContentCardSocialActions;