"""
Infrastructure - Simple Reranker (Placeholder)

In production, use cross-encoder reranker.
"""
from typing import List

from app.domain.interfaces import IReranker, RetrievalResult


class SimpleReranker(IReranker):
    """Simple reranker - just returns top-k by score"""

    async def rerank(
        self, query: str, results: List[RetrievalResult], top_k: int = 10
    ) -> List[RetrievalResult]:
        """Rerank results (simplified - just sort by score)"""
        # Sort by score descending
        sorted_results = sorted(results, key=lambda x: x.score, reverse=True)
        return sorted_results[:top_k]