"""Configuration for the billing API, loaded from environment / .env file."""
from functools import lru_cache

from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    # OpenStack endpoints
    keystone_auth_url: str = "https://internal.3engine.rootxwire.com:5000"
    cloudkitty_url: str = "https://internal.3engine.rootxwire.com:8889"

    # Keystone credentials (needs visibility over all projects' rating data,
    # i.e. admin or a reader role on the service project)
    os_username: str = "admin"
    os_password: str = ""
    os_project_name: str = "admin"
    os_user_domain: str = "Default"
    os_project_domain: str = "Default"

    # Cluster uses self-signed certs on internal endpoints
    verify_ssl: bool = False

    # CloudKitty stores period boundaries in the cluster-local tz (+05:30)
    billing_tz: str = "Asia/Kolkata"

    http_timeout: float = 30.0
    # Cache the Keystone token this long (tokens are valid ~1h by default)
    token_ttl_seconds: int = 2700

    # Optional endpoint overrides. Empty = use the Keystone catalog's
    # public URLs (correct when running outside the cluster network).
    nova_url: str = ""
    cinder_url: str = ""
    neutron_url: str = ""

    # SMTP for emailing tenant reports. Leave smtp_host empty to disable;
    # the /send endpoint then returns the report for manual sharing instead.
    smtp_host: str = ""
    smtp_port: int = 587
    smtp_user: str = ""
    smtp_password: str = ""
    smtp_from: str = "billing@connectvm.com"
    smtp_tls: bool = True

    class Config:
        env_file = ".env"
        env_prefix = "BILLING_"


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