"""Core application configuration."""
from typing import Optional
from pydantic_settings import BaseSettings


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

    # Application
    APP_NAME: str = "AI Legal Assistant"
    APP_VERSION: str = "1.0.0"
    DEBUG: bool = False

    # Database
    DATABASE_URL: str = "sqlite+aiosqlite:///./data/legal_assistant.db"

    # LLM Configuration
    LLM_API_KEY: Optional[str] = None
    LLM_API_BASE: str = "https://api.openai.com/v1"
    LLM_MODEL: str = "gpt-4o-mini"

    # Embedding Configuration
    EMBEDDING_API_KEY: Optional[str] = None
    EMBEDDING_API_BASE: str = "https://api.openai.com/v1"
    EMBEDDING_MODEL: str = "text-embedding-3-small"
    EMBEDDING_DIMENSION: int = 1536

    # JWT Configuration
    JWT_SECRET_KEY: str = "your-secret-key-change-in-production"
    JWT_ALGORITHM: str = "HS256"
    JWT_ACCESS_TOKEN_EXPIRE_MINUTES: int = 1440  # 24 hours
    JWT_REFRESH_TOKEN_EXPIRE_DAYS: int = 7

    # File Storage
    UPLOAD_DIR: str = "./uploads"
    MAX_UPLOAD_SIZE: int = 10 * 1024 * 1024  # 10MB

    # Signature
    SIGNATURE_TOKEN_EXPIRE_HOURS: int = 72  # 3 days

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        case_sensitive = True


settings = Settings()