"""Google 로그인 설정과 분리한다. 서비스 계정 키는 서버 파일로만 읽는다."""
import os
from dataclasses import dataclass
from urllib.parse import urlsplit


@dataclass(frozen=True)
class SearchConsoleSettings:
    property_url: str
    credentials_file: str
    alert_url: str = ""
    alert_days: int = 7


def load_settings() -> SearchConsoleSettings | None:
    if os.environ.get("GSC_ENABLED") != "1":
        return None
    prop = os.environ.get("GSC_PROPERTY_URL", "").strip()
    key_file = os.environ.get("GSC_CREDENTIALS_FILE", "").strip()
    if not prop or not key_file:
        raise ValueError("GSC_CONFIG_MISSING")
    parsed = urlsplit(prop)
    domain_property = prop.startswith("sc-domain:") and bool(prop.removeprefix("sc-domain:"))
    root_property = (parsed.scheme == "https" and parsed.hostname and parsed.path == "/"
                     and not parsed.query and not parsed.fragment and not parsed.username)
    if not domain_property and not root_property:
        raise ValueError("GSC_PROPERTY_INVALID")
    days = int(os.environ.get("GSC_ALERT_DAYS", "7"))
    if days < 1:
        raise ValueError("GSC_ALERT_DAYS_INVALID")
    return SearchConsoleSettings(prop, key_file, os.environ.get("GSC_ALERT_WEBHOOK_URL", ""), days)


def belongs_to_property(page_url: str, property_url: str) -> bool:
    parsed = urlsplit(page_url)
    if parsed.scheme != "https" or not parsed.hostname or parsed.username or parsed.password:
        return False
    if parsed.query or parsed.fragment:
        return False
    if property_url.startswith("sc-domain:"):
        domain = property_url.removeprefix("sc-domain:").lower()
        return bool(domain) and (parsed.hostname == domain or parsed.hostname.endswith("." + domain))
    return page_url.startswith(property_url)