from typing import Optional

from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    # API Keys
    ANTHROPIC_API_KEY: Optional[str] = None
    OPENAI_API_KEY: Optional[str] = None

    # Provider Settings
    DEFAULT_PROVIDER: str = "claude"
    CLAUDE_MODEL: str = "claude-3-5-sonnet-20241022"
    OPENAI_MODEL: str = "gpt-4-turbo-preview"

    # API Settings
    MAX_TOKENS: int = 4000
    TEMPERATURE: float = 0.7
    TIMEOUT: int = 60

    # CORS
    FRONTEND_URL: str = "http://localhost:3000"

    # Rate Limiting
    RATE_LIMIT_REQUESTS: int = 10
    RATE_LIMIT_WINDOW: int = 60

    # Microsoft Entra ID
    ENTRA_TENANT_ID: Optional[str] = None
    ENTRA_CLIENT_ID: Optional[str] = None
    ENTRA_CLIENT_SECRET: Optional[str] = None
    ENTRA_REDIRECT_URI: str = "http://localhost:3000/auth/callback"

    # JWT
    JWT_SECRET: str = "change-this-in-production-use-a-secure-random-string"
    JWT_ALGORITHM: str = "HS256"
    JWT_EXPIRY_HOURS: int = 24

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


settings = Settings()