# app/config.py
import os
from typing import Optional
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """
    Application settings with environment variable support.
    All settings can be overridden via environment variables.
    """

    # Database settings (existing)
    mariadb_host: str = "db"
    mariadb_user: str = "crumb"
    mariadb_password: str = "secret"
    mariadb_database: str = "crumbcrm"

    # Session settings (existing)
    secret_key: str = "change-me-in-production"

    # AI Provider API Keys
    openai_api_key: Optional[str] = None
    openrouter_api_key: Optional[str] = None
    anthropic_api_key: Optional[str] = None

    # RAG Configuration - Default Providers
    default_embedding_provider: str = "openrouter"  # Use OpenRouter (supports both embeddings and Claude)
    default_embedding_model: str = "text-embedding-3-small"  # Without openai/ prefix (works for both providers)
    default_completion_provider: str = "openrouter"
    default_completion_model: str = "anthropic/claude-3-5-sonnet"

    # Qdrant Configuration
    qdrant_host: str = "qdrant"
    qdrant_port: int = 6333

    # RAG Settings
    rag_chunk_size: int = 1000
    rag_chunk_overlap: int = 200
    rag_collection_prefix: str = "posts"

    class Config:
        env_file = ".env"
        case_sensitive = False
        extra = "ignore"


# Global settings instance
settings = Settings()


def get_settings() -> Settings:
    """
    Get the global settings instance.
    Can be used as a FastAPI dependency.
    """
    return settings