"""
Configuration management using Pydantic Settings
"""

from functools import lru_cache
from typing import List

from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """Application settings"""

    # MongoDB
    MONGODB_URL: str = "mongodb://admin:password@localhost:27017"
    MONGODB_DATABASE: str = "datacenter_docs"

    # Redis
    REDIS_URL: str = "redis://localhost:6379/0"

    # MCP Server
    MCP_SERVER_URL: str = "http://localhost:8080"
    MCP_API_KEY: str = "default-key"

    # Anthropic Claude API
    ANTHROPIC_API_KEY: str = "sk-ant-default-key"

    # CORS
    CORS_ORIGINS: List[str] = ["*"]

    # Application
    LOG_LEVEL: str = "INFO"
    DEBUG: bool = False

    # API Configuration
    API_HOST: str = "0.0.0.0"
    API_PORT: int = 8000
    WORKERS: int = 4

    # LLM Configuration
    MAX_TOKENS: int = 4096
    TEMPERATURE: float = 0.3
    MODEL: str = "claude-sonnet-4-20250514"

    # Vector Store
    VECTOR_STORE_PATH: str = "./data/chroma_db"
    EMBEDDING_MODEL: str = "sentence-transformers/all-MiniLM-L6-v2"

    # Celery
    CELERY_BROKER_URL: str = "redis://localhost:6379/0"
    CELERY_RESULT_BACKEND: str = "redis://localhost:6379/0"

    class Config:
        env_file = ".env"
        case_sensitive = True


@lru_cache()
def get_settings() -> Settings:
    """Get cached settings instance"""
    return Settings()