import os
from functools import lru_cache
from typing import Optional

from pydantic_settings import BaseSettings


if os.getenv("HUGGINGFACE_DEMO"):
    OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
    ANTHROPIC_API_KEY = os.getenv("ANTHROPIC_API_KEY")
else:
    from app.aws.secrets import get_secret

    secrets = get_secret()
    os.environ["WANDB_API_KEY"] = secrets["WANDB_API_KEY"]
    OPENAI_API_KEY = secrets["OPENAI_API_KEY"]
    ANTHROPIC_API_KEY = secrets["ANTHROPIC_API_KEY"]
os.environ["WANDB_BASE_URL"] = "https://api.wandb.ai"


class Settings(BaseSettings):
    # Supported openai models
    OPENAI_MODELS: list = [
        "gpt-4o",  # first model is the default of the vendor
        "gpt-4o-2024-11-20",
        "gpt-4o-mini",
    ]

    # Supported anthropic models
    ANTHROPIC_MODELS: list = [
        "claude-3-5-sonnet-latest"  # first model is the default of the vendor
    ]

    # Supprted AI Services
    SUPPORTED_MODELS: list = OPENAI_MODELS + ANTHROPIC_MODELS

    # API Keys
    OPENAI_API_KEY: str
    ANTHROPIC_API_KEY: str

    DEFAULT_MAX_ATTEMPTS: int = 1

    # AI Service Configuration
    DEFAULT_MODEL: str = OPENAI_MODELS[0]
    MAX_TOKENS: int = 2000
    TEMPERATURE: float = 0.0

    # CORS Configuration
    CORS_ALLOW_ORIGINS: bool = True

    # API Configuration
    API_V1_PREFIX: str = "/api/v1"
    PROJECT_NAME: str = "Dreem Attribution"
    DEBUG: bool = False

    # Rate Limiting
    RATE_LIMIT_CALLS: int = 100
    RATE_LIMIT_PERIOD: int = 60

    # Cache Configuration
    REDIS_URL: Optional[str] = None
    CACHE_TTL: int = 3600  # 1 hour

    # Logging
    LOG_LEVEL: str = "INFO"
    LOG_FORMAT: str = "json"

    # Timeout Configuration
    OPENAI_TIMEOUT: float = 30.0
    ANTHROPIC_TIMEOUT: float = 30.0

    # API Keys
    OPENAI_API_KEY: str = OPENAI_API_KEY
    ANTHROPIC_API_KEY: str = ANTHROPIC_API_KEY

    def validate_api_keys(self):
        """Validate that required API keys are present."""
        if not self.OPENAI_API_KEY:
            raise ValueError("OPENAI_API_KEY is required")
        if not self.ANTHROPIC_API_KEY:
            raise ValueError("ANTHROPIC_API_KEY is required")


# Create a cached instance of settings
@lru_cache
def get_settings() -> Settings:
    """
    Create and cache a Settings instance.
    Returns the same instance for subsequent calls.
    """
    settings = Settings()
    settings.validate_api_keys()
    return settings