import os
from pathlib import Path


class Config:
    SECRET_KEY = os.environ.get("SECRET_KEY", "dev-secret-change-in-production")
    SQLALCHEMY_DATABASE_URI = os.environ.get(
        "DATABASE_URL",
        f"sqlite:///{Path(os.environ.get('DATA_DIR', 'data')).resolve() / 'mirror.db'}",
    )
    SQLALCHEMY_TRACK_MODIFICATIONS = False

    ADMIN_USERNAME = os.environ.get("ADMIN_USERNAME", "admin")
    ADMIN_PASSWORD = os.environ.get("ADMIN_PASSWORD", "admin")

    DATA_DIR = Path(os.environ.get("DATA_DIR", "data"))
    BACKUP_DIR = DATA_DIR / "backups"
    HOST_ROOT = os.environ.get("HOST_ROOT", "")

    ROLLBACK_MINUTES = int(os.environ.get("ROLLBACK_MINUTES", "15"))
    AUTO_TEST_INTERVAL_MINUTES = int(os.environ.get("AUTO_TEST_INTERVAL_MINUTES", "30"))

    RESOLVED_DROPIN = "mirror-manager.conf"
    RESOLVED_DROPIN_DIR = "resolved.conf.d"
    GIT_CONFIG_GLOBAL = Path.home() / ".gitconfig"

    @classmethod
    def host_path(cls, *parts: str) -> Path:
        return Path(cls.HOST_ROOT).joinpath(*parts)

    @classmethod
    def ensure_dirs(cls) -> None:
        cls.DATA_DIR.mkdir(parents=True, exist_ok=True)
        cls.BACKUP_DIR.mkdir(parents=True, exist_ok=True)