from dataclasses import dataclass, field
from typing import List, Optional
import os
from dotenv import load_dotenv
from fastapi import HTTPException, Depends, Security
from fastapi.security import APIKeyHeader
from starlette.status import HTTP_403_FORBIDDEN

# Load environment variables

# Construct the path to the .env file
# dotenv_path = os.path.join(os.path.dirname(__file__), '..', '.env')

# Load environment variables from the specified path
load_dotenv()

@dataclass
class Config:
    # API Keys
    cohere_api_key: str = os.getenv("COHERE_API_KEY", "")
    groq_api_key: str = os.getenv("GROQ_API_KEY", "")
    pinecone_api_key: str = os.getenv("PINECONE_API_KEY", "")
    api_token: str = os.getenv("API_TOKEN", "default_secret_token")  # Default token for development

    # Pinecone Configuration
    pinecone_index_name: str = os.getenv("PINECONE_INDEX_NAME", "news-articles")
    vector_dimension: int = 1024  # Cohere embedding dimension
    top_k_results: int = 5

    # News Sources
    rss_feeds: List[str] = field(default_factory=lambda: [
        # "https://feeds.feedburner.com/TechCrunch/",
        # "https://www.theverge.com/rss/index.xml",
        "https://www.wired.com/feed/rss",
        "https://www.technologyreview.com/feed/",
    ])

    # Data Directories
    raw_news_dir: str = "data/raw_news"
    processed_news_dir: str = "data/processed_news"

    def __post_init__(self):
        # Create directories if they don't exist
        os.makedirs(self.raw_news_dir, exist_ok=True)
        os.makedirs(self.processed_news_dir, exist_ok=True)

# Create a global config instance
config = Config()

# API Key header
api_key_header = APIKeyHeader(name="X-API-Token", auto_error=False)

def verify_api_token(api_key: str):
    """
    Verify the API token from the request header.
    
    Args:
        api_key: The API key from the request header
        
    Returns:
        The API key if valid
        
    Raises:
        HTTPException: If the API key is invalid
    """
    if api_key == config.api_token:
        print(f"API key verified: {api_key}")
        return api_key
    raise HTTPException(
        status_code=HTTP_403_FORBIDDEN, 
        detail="Invalid API token"
    )