import { useSortable } from '@dnd-kit/sortable';
import { CSS } from '@dnd-kit/utilities';
import { Card as CardType } from '../../types/kanban';
import MessageSquareIcon from '../icons/MessageSquareIcon';
import CheckSquareIcon from '../icons/CheckSquareIcon';
import ChevronLeftIcon from '../icons/ChevronLeftIcon';
import { Link } from 'react-router-dom';

interface KanbanCardProps {
  card: CardType;
  onOpenModal: () => void;
}

export function KanbanCard({ card, onOpenModal }: KanbanCardProps) {
  const { attributes, listeners, setNodeRef, transform, transition, isDragging } = useSortable({
    id: `CARD_${card.id}`,
  });

  const style = {
    transform: CSS.Transform.toString(transform),
    transition,
    opacity: isDragging ? 0.5 : 1,
  };

  // Calculate checklist progress
  const checklists = (card as any).checklists || [];
  const totalItems = checklists.reduce(
    (sum: number, checklist: any) => sum + checklist.items.length,
    0
  );
  const completedItems = checklists.reduce(
    (sum: number, checklist: any) =>
      sum + checklist.items.filter((item: any) => item.state === 'complete').length,
    0
  );
  const hasChecklists = totalItems > 0;

  // Calculate comment count
  const comments = (card as any).comments || [];
  const commentCount = comments.length;
  const hasComments = commentCount > 0;

  // Get labels
  const labels = (card as any).labels || [];
  const hasLabels = labels.length > 0;

  // Get epic
  const epic = (card as any).epic;
  const hasEpic = epic !== null && epic !== undefined;

  // Get parent card name
  const parentCardName = card.parent_card_name;
  const hasParent = !!parentCardName;

  return (
    <div
      ref={setNodeRef}
      style={style}
      {...attributes}
      {...listeners}
      onClick={(e) => {
        // Only open modal if not clicking title link
        if (!(e.target as HTMLElement).closest('a')) {
          onOpenModal();
        }
      }}
      className="bg-gray-700 rounded-lg p-4 mb-3 cursor-pointer hover:bg-gray-600 transition-colors border border-gray-600 shadow-sm"
    >
      {/* Parent Card Indicator */}
      {hasParent && (
        <div className="mb-2">
          <span className="inline-flex items-center gap-1 px-2 py-0.5 rounded text-xs font-medium bg-purple-900/40 text-purple-300 border border-purple-700/50">
            <span className="w-2.5 h-2.5">
              <ChevronLeftIcon />
            </span>
            {parentCardName}
          </span>
        </div>
      )}

      {/* Epic Badge */}
      {hasEpic && (
        <div className="mb-2">
          <span
            className="px-2 py-0.5 rounded text-xs font-medium"
            style={{
              backgroundColor: epic.color ? `${epic.color}33` : '#3b82f633',
              color: epic.color || '#3b82f6',
              border: `1px solid ${epic.color || '#3b82f6'}66`,
            }}
          >
            {epic.name}
          </span>
        </div>
      )}

      {/* Labels */}
      {hasLabels && (
        <div className="flex flex-wrap gap-1 mb-2">
          {labels.slice(0, 3).map((label: any) => (
            <span
              key={label.id}
              className="px-2 py-0.5 rounded text-xs font-medium text-white"
              style={{ backgroundColor: label.color }}
            >
              {label.name}
            </span>
          ))}
          {labels.length > 3 && (
            <span className="px-2 py-0.5 rounded text-xs font-medium text-gray-400">
              +{labels.length - 3}
            </span>
          )}
        </div>
      )}

      <h3 className="text-white font-medium mb-2 hover:text-blue-400 transition-colors">
        <Link
          to={`/boards/${card.board_id}/cards/${card.id}`}
          onClick={(e) => e.stopPropagation()}
          className="hover:underline"
        >
          {card.name}
        </Link>
      </h3>

      {card.description && (
        <p className="text-gray-400 text-sm mb-3 line-clamp-2">{card.description}</p>
      )}

      {/* Badges */}
      <div className="flex items-center gap-3 text-xs text-gray-400 mt-3 pt-2 border-t border-gray-600">
        {/* Comments Badge */}
        {hasComments && (
          <div className="flex items-center gap-1">
            <span className="w-3.5 h-3.5">
              <MessageSquareIcon />
            </span>
            <span>{commentCount}</span>
          </div>
        )}

        {/* Checklist Badge */}
        {hasChecklists && (
          <div className="flex items-center gap-1">
            <span className="w-3.5 h-3.5">
              <CheckSquareIcon />
            </span>
            <span>
              {completedItems}/{totalItems}
            </span>
          </div>
        )}

        {/* Due Date Badge */}
        {card.due && (
          <span className={card.due_complete ? 'text-green-400' : 'text-yellow-400'}>
            Due: {new Date(card.due).toLocaleDateString()}
          </span>
        )}

        {/* Card ID */}
        <span className="text-gray-500">#{card.id_short}</span>
      </div>
    </div>
  );
}