import numpy as np
from typing import List, Tuple, Dict
from .openai_utils.embedding import EmbeddingModel

class VectorDatabase:
    def __init__(self, embedding_model: EmbeddingModel = None):
        self.vectors: Dict[str, np.ndarray] = {}
        self.texts: List[str] = []
        self.embedding_model = embedding_model or EmbeddingModel()

    async def abuild_from_list(self, list_of_text: List[str]) -> 'VectorDatabase':
        embeddings = await self.embedding_model.async_get_embeddings(list_of_text)
        for text, embedding in zip(list_of_text, embeddings):
            self.insert(text, np.array(embedding))
        return self

    def insert(self, text: str, vector: np.ndarray):
        self.texts.append(text)
        self.vectors[text] = vector

    def search_by_text(self, query: str, k: int = 4) -> List[Tuple[str, float]]:
        query_embedding = self.embedding_model.get_embedding(query)
        similarities = []
        
        for text, vector in self.vectors.items():
            similarity = np.dot(query_embedding, vector) / (np.linalg.norm(query_embedding) * np.linalg.norm(vector))
            similarities.append((text, similarity))
        
        return sorted(similarities, key=lambda x: x[1], reverse=True)[:k]