from functools import lru_cache
from pathlib import Path

from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    SERVICE_NAME: str = "planet-ai-provider"
    SERVICE_VERSION: str = "0.1.0"

    AI_PROVIDER: str = "disabled"
    AI_BASE_URL: str = "https://api.openai.com/v1"
    AI_API_KEY: str = ""
    AI_MODEL: str = ""
    AI_TIMEOUT_SECONDS: int = 60
    AI_HTTP_RETRY_ATTEMPTS: int = 2
    AI_MAX_TOKENS: int = 1200
    AI_ANTHROPIC_VERSION: str = "2023-06-01"
    AI_ANALYSIS_SYSTEM_PROMPT: str = (
        "你是态势感知分析助手。请基于输入的上下文、观测与约束，输出结构化、克制、可执行的分析。"
    )

    AI_PROVIDER_SERVICE_TOKEN: str = ""

    class Config:
        env_file = Path(__file__).parent / ".env"
        case_sensitive = True


@lru_cache()
def get_settings() -> Settings:
    return Settings()


settings = get_settings()