"""
settings.py — RAG API configuration loaded from environment variables.
"""

from __future__ import annotations

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file='.env', extra='ignore')

    # App
    app_title: str = 'Second Brain RAG API'
    app_version: str = '1.0.0'
    log_level: str = 'INFO'

    # Database
    database_url: str = 'postgresql://brain:brain@postgres:5432/second_brain'
    db_pool_min: int = 2
    db_pool_max: int = 20

    # Ollama
    ollama_url: str = 'http://ollama:11434'
    embedding_model: str = 'nomic-embed-text'
    chat_model: str = 'mistral'
    embedding_dimensions: int = 768

    # Search defaults
    search_top_k: int = 10
    search_threshold: float = 0.65
    rerank_enabled: bool = False

    # CORS (comma-separated origins)
    cors_origins: str = 'http://localhost:3000'

    @property
    def cors_origins_list(self) -> list[str]:
        return [o.strip() for o in self.cors_origins.split(',') if o.strip()]