import os
from typing import Optional
from pydantic import BaseModel
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()

class Settings(BaseModel):
    """Application settings loaded from environment variables."""
    
    # Application information
    APP_NAME: str = os.getenv("APP_NAME", "Mini SpecsComply Pro")
    APP_VERSION: str = os.getenv("APP_VERSION", "0.1.0")
    DEBUG: bool = os.getenv("DEBUG", "False").lower() in ("true", "1", "t")
    
    # API keys
    GROQ_API_KEY: Optional[str] = os.getenv("GROQ_API_KEY")
    COHERE_API_KEY: Optional[str] = os.getenv("COHERE_API_KEY")
    
    # Vector database settings
    # Pinecone
    PINECONE_API_KEY: Optional[str] = os.getenv("PINECONE_API_KEY")
    PINECONE_INDEX_NAME: str = os.getenv("PINECONE_INDEX_NAME", "specscomply_documents")
    
    # Weaviate
    WEAVIATE_URL: Optional[str] = os.getenv("WEAVIATE_URL")
    WEAVIATE_API_KEY: Optional[str] = os.getenv("WEAVIATE_API_KEY")
    
    # Models
    EMBEDDING_MODEL: str = "embed-english-v3.0"  # Default embedding model
    RERANKER_MODEL: str = "rerank-english-v2.0"  # Default reranker model
    REASONING_MODEL: str = "llama-3.3-70b-versatile"  # Default reasoning model
    PROCESSING_MODEL: str = "llama-3.3-70b-versatile"  # Default quick processing model
    
    # Vector database selector (pinecone or weaviate)
    VECTOR_DB: str = os.getenv("VECTOR_DB", "pinecone").lower()
    
    class Config:
        env_file = ".env"
        case_sensitive = True

# Create global settings instance
settings = Settings()