import { useState } from 'react';
import { MessageSquare, Pencil, Trash2 } from 'lucide-react';
import type { DiffComment } from '@/stores/useDiffCommentStore';
import { InlineReviewEditor } from './InlineReviewEditor';

interface InlineReviewThreadProps {
  comments: DiffComment[];
  onEditComment: (id: string, body: string) => void;
  onDeleteComment: (id: string) => void;
}

export function InlineReviewThread({
  comments,
  onEditComment,
  onDeleteComment,
}: InlineReviewThreadProps) {
  const [expanded, setExpanded] = useState(true);
  const [editingId, setEditingId] = useState<string | null>(null);
  const [editBody, setEditBody] = useState('');

  if (comments.length === 0) return null;

  const handleStartEdit = (id: string, body: string) => {
    setEditingId(id);
    setEditBody(body);
  };

  const handleSaveEdit = (body: string) => {
    if (editingId) {
      onEditComment(editingId, body);
      setEditingId(null);
    }
  };

  const handleCancelEdit = () => {
    setEditingId(null);
  };

  return (
    <div className="ml-1 border-l-2 border-blue-400/40 pl-2 my-1">
      <button
        type="button"
        onClick={() => setExpanded(!expanded)}
        className="flex items-center gap-1 text-[10px] text-muted-foreground hover:text-foreground mb-0.5"
      >
        <MessageSquare size={10} />
        <span>{comments.length} comment{comments.length > 1 ? 's' : ''}</span>
        <span className="text-[9px]">{expanded ? '▲' : '▼'}</span>
      </button>

      {expanded && (
        <div className="space-y-1">
          {comments.map((comment) => (
            <div key={comment.id} className="text-xs">
              {editingId === comment.id ? (
                <InlineReviewEditor
                  initialBody={editBody}
                  onSave={handleSaveEdit}
                  onCancel={handleCancelEdit}
                />
              ) : (
                <div className="flex items-start gap-1 group">
                  <span className="flex-1 text-foreground/90 leading-relaxed whitespace-pre-wrap">
                    {comment.body}
                  </span>
                  <div className="hidden group-hover:flex items-center gap-0.5 shrink-0 mt-0.5">
                    <button
                      type="button"
                      onClick={() => handleStartEdit(comment.id, comment.body)}
                      className="p-0.5 rounded hover:bg-muted text-muted-foreground"
                      title="Edit"
                    >
                      <Pencil size={10} />
                    </button>
                    <button
                      type="button"
                      onClick={() => onDeleteComment(comment.id)}
                      className="p-0.5 rounded hover:bg-muted text-muted-foreground hover:text-destructive"
                      title="Delete"
                    >
                      <Trash2 size={10} />
                    </button>
                  </div>
                </div>
              )}
            </div>
          ))}
        </div>
      )}
    </div>
  );
}