"""
Similarity search utilities.
"""

from typing import Any
from dataclasses import dataclass


@dataclass
class SemanticMatch:
    """Represents a semantic match result."""

    query: str
    match: str
    similarity_score: float
    match_type: str


@dataclass
class SimilarityResult:
    """Represents a similarity search result."""

    query: str
    matches: list[SemanticMatch]
    total_matches: int
    search_time: float


class SimilaritySearcher:
    """Search for similar content."""

    def __init__(self, similarity_threshold: float = 0.6, max_results: int = 5):
        """Initialize the similarity searcher."""
        self.similarity_threshold = similarity_threshold
        self.max_results = max_results
        self.enable_semantic_search = True
        self.knowledge_index = {}
        self.content_vectors = {}

    def search(self, query: str, candidates: list[str]) -> SimilarityResult:
        """Search for similar content."""
        # Placeholder implementation
        matches = [
            SemanticMatch(query=query, match=candidate, similarity_score=0.7, match_type="exact")
            for candidate in candidates[: self.max_results]
        ]

        return SimilarityResult(query=query, matches=matches, total_matches=len(matches), search_time=0.1)

    def validate_input(self, knowledge_points: list[Any]) -> bool:
        """Validate input knowledge points."""
        # Placeholder implementation
        return isinstance(knowledge_points, list) and len(knowledge_points) > 0
