import { ExternalLink, BookmarkPlus, BookmarkCheck, Copy } from 'lucide-react';
import { clsx } from 'clsx';
import toast from 'react-hot-toast';
import { useBibliographyStore } from '../store/bibliography';
import type { SearchSource } from '../types';

interface SourceCardProps {
  source: SearchSource;
}

const SOURCE_DB_LABELS: Record<string, string> = {
  openalex: 'OpenAlex',
  cyberleninka: 'КиберЛенинка',
  arxiv: 'arXiv',
  wikipedia_ru: 'Wikipedia RU',
  wikipedia_en: 'Wikipedia EN',
};

function getRelevanceColor(score: number): string {
  if (score >= 0.7) return 'text-green-700 bg-green-50 border-green-200';
  if (score >= 0.4) return 'text-yellow-700 bg-yellow-50 border-yellow-200';
  return 'text-gray-600 bg-gray-50 border-gray-200';
}

export function SourceCard({ source }: SourceCardProps) {
  const { addSource, removeSource, hasSource } = useBibliographyStore();
  const inBibliography = hasSource(source.id);

  const handleToggleBibliography = () => {
    if (inBibliography) {
      removeSource(source.id);
      toast.success('Удалено из библиографии');
    } else {
      addSource(source);
      toast.success('Добавлено в библиографию');
    }
  };

  const handleCopyCitation = () => {
    navigator.clipboard.writeText(source.gost_citation).then(() => {
      toast.success('ГОСТ-цитата скопирована');
    });
  };

  const authorsStr = source.authors
    .slice(0, 3)
    .map((a) => `${a.last_name} ${a.initials || ''}`.trim())
    .join(', ');

  return (
    <div className="bg-white rounded-xl border border-gray-100 p-5 hover:border-gray-200 hover:shadow-sm transition-all duration-200">
      {/* Заголовок и значки */}
      <div className="flex items-start justify-between gap-3 mb-3">
        <div className="flex-1 min-w-0">
          <h3 className="text-base font-semibold text-gray-900 leading-snug line-clamp-2 mb-1">
            {source.title}
          </h3>
          <div className="flex items-center gap-2 flex-wrap">
            {authorsStr && (
              <span className="text-sm text-gray-500">{authorsStr}</span>
            )}
            {source.year && (
              <span className="text-sm text-gray-400">{source.year}</span>
            )}
            {source.journal && (
              <span className="text-sm text-gray-400 italic">{source.journal}</span>
            )}
          </div>
        </div>

        {/* Бейдж релевантности */}
        <div className={clsx(
          'flex-shrink-0 px-2 py-1 rounded-lg text-xs font-medium border',
          getRelevanceColor(source.relevance_score)
        )}>
          {(source.relevance_score * 100).toFixed(0)}%
        </div>
      </div>

      {/* Аннотация */}
      {source.abstract && (
        <p className="text-sm text-gray-600 line-clamp-3 mb-3">
          {source.abstract}
        </p>
      )}

      {/* ГОСТ-цитата */}
      <div className="bg-gray-50 rounded-lg p-3 mb-3">
        <p className="text-xs text-gray-500 mb-1 font-medium">ГОСТ-цитата:</p>
        <p className="text-xs text-gray-700 leading-relaxed">{source.gost_citation}</p>
      </div>

      {/* Действия */}
      <div className="flex items-center gap-2 flex-wrap">
        {/* Источник */}
        <span className="px-2 py-1 bg-gray-100 text-gray-500 text-xs rounded-md">
          {SOURCE_DB_LABELS[source.source_db] || source.source_db}
        </span>

        <div className="ml-auto flex items-center gap-1.5">
          {/* Открыть источник */}
          {source.url && (
            <a
              href={source.url}
              target="_blank"
              rel="noopener noreferrer"
              className="inline-flex items-center gap-1 px-3 py-1.5 text-xs font-medium text-gray-600 bg-white border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors"
            >
              <ExternalLink className="w-3 h-3" />
              Открыть
            </a>
          )}

          {/* Копировать цитату */}
          <button
            onClick={handleCopyCitation}
            className="inline-flex items-center gap-1 px-3 py-1.5 text-xs font-medium text-gray-600 bg-white border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors"
          >
            <Copy className="w-3 h-3" />
            Цитата
          </button>

          {/* В библиографию */}
          <button
            onClick={handleToggleBibliography}
            className={clsx(
              'inline-flex items-center gap-1 px-3 py-1.5 text-xs font-medium rounded-lg transition-colors',
              inBibliography
                ? 'bg-brand-600 text-white hover:bg-brand-700'
                : 'bg-white text-brand-600 border border-brand-200 hover:bg-brand-50'
            )}
          >
            {inBibliography ? (
              <><BookmarkCheck className="w-3 h-3" />Добавлено</>
            ) : (
              <><BookmarkPlus className="w-3 h-3" />В библиографию</>
            )}
          </button>
        </div>
      </div>
    </div>
  );
}