import os
from pathlib import Path
import yaml
from dotenv import load_dotenv

PROJECT_ROOT = Path(__file__).resolve().parent.parent

# 加载 .env 文件
load_dotenv(PROJECT_ROOT / ".env")


def _get_env(key: str, default=None):
    return os.environ.get(key, default)


def _load_yaml(filename: str) -> dict:
    filepath = PROJECT_ROOT / "config" / filename
    with open(filepath, encoding="utf-8") as f:
        return yaml.safe_load(f) or {}


class _Settings:
    def __init__(self):
        self._db_cfg = _load_yaml("database_config.yaml")
        self._model_cfg = _load_yaml("model_config.yaml")
        self._service_cfg = _load_yaml("service_config.yaml")

    @property
    def mysql_host(self) -> str:
        return _get_env("MYSQL_HOST", self._db_cfg.get("mysql", {}).get("host", "localhost"))

    @property
    def mysql_port(self) -> int:
        return int(_get_env("MYSQL_PORT", self._db_cfg.get("mysql", {}).get("port", 3306)))

    @property
    def mysql_user(self) -> str:
        return _get_env("MYSQL_USER", self._db_cfg.get("mysql", {}).get("user", "root"))

    @property
    def mysql_password(self) -> str:
        return _get_env("MYSQL_PASSWORD", self._db_cfg.get("mysql", {}).get("passwd", ""))

    @property
    def mysql_db(self) -> str:
        return _get_env("MYSQL_DB", self._db_cfg.get("mysql", {}).get("db", ""))

    @property
    def redis_host(self) -> str:
        return _get_env("REDIS_HOST", self._db_cfg.get("redis", {}).get("host", "localhost"))

    @property
    def redis_port(self) -> int:
        return int(_get_env("REDIS_PORT", self._db_cfg.get("redis", {}).get("port", 6379)))

    @property
    def redis_password(self) -> str:
        return _get_env("REDIS_PASSWORD", self._db_cfg.get("redis", {}).get("passwd", ""))

    @property
    def redis_db(self) -> int:
        return int(_get_env("REDIS_DB", self._db_cfg.get("redis", {}).get("db", 0)))

    @property
    def log_level(self) -> str:
        return _get_env("LOG_LEVEL", "INFO").upper()

    @property
    def file_upload_url(self) -> str:
        return _get_env("FILE_UPLOAD_URL", self._service_cfg.get("aliyun", {}).get("upload_url", ""))

    @property
    def file_download_url(self) -> str:
        return _get_env("FILE_DOWNLOAD_URL", self._service_cfg.get("aliyun", {}).get("download_url", ""))

    @property
    def model_config(self) -> dict:
        return self._model_cfg


settings = _Settings()