import os
from dataclasses import dataclass
from pathlib import Path


def load_local_env() -> None:
    env_path = Path(__file__).parents[1] / ".env"
    if not env_path.exists():
        return

    for raw_line in env_path.read_text(encoding="utf-8").splitlines():
        line = raw_line.strip()
        if not line or line.startswith("#") or "=" not in line:
            continue
        key, value = line.split("=", 1)
        os.environ.setdefault(key.strip(), value.strip().strip('"').strip("'"))


load_local_env()


AUTH_REQUIRE_HTTPS = os.getenv("AUTH_REQUIRE_HTTPS", "1") == "1"
AUTH_ALLOW_INSECURE_LOCAL = os.getenv("AUTH_ALLOW_INSECURE_LOCAL", "1") == "1"
AUTH_COOKIE_SECURE = os.getenv("AUTH_COOKIE_SECURE", "1") == "1"

# 阿里云 OSS 配置预留：可以直接在这里填写，也可以用同名环境变量覆盖。
OSS_ENDPOINT = os.getenv("OSS_ENDPOINT", "")
OSS_INTERNAL_ENDPOINT = os.getenv("OSS_INTERNAL_ENDPOINT", "")
OSS_USE_INTERNAL = os.getenv("OSS_USE_INTERNAL", "0") == "1"
OSS_BUCKET_NAME = os.getenv("OSS_BUCKET_NAME", "")
OSS_ACCESS_KEY_ID = os.getenv("OSS_ACCESS_KEY_ID", "")
OSS_ACCESS_KEY_SECRET = os.getenv("OSS_ACCESS_KEY_SECRET", "")
OSS_PUBLIC_BASE_URL = os.getenv("OSS_PUBLIC_BASE_URL", "")
OSS_UPLOAD_PREFIX = os.getenv("OSS_UPLOAD_PREFIX", "product-images")

WECHAT_PAY_APPID = os.getenv("WECHAT_PAY_APPID", "")
WECHAT_PAY_MCH_ID = os.getenv("WECHAT_PAY_MCH_ID", "")
WECHAT_PAY_MCH_SERIAL_NO = os.getenv("WECHAT_PAY_MCH_SERIAL_NO", "")
WECHAT_PAY_API_V3_KEY = os.getenv("WECHAT_PAY_API_V3_KEY", "")
WECHAT_PAY_PRIVATE_KEY_PATH = os.getenv("WECHAT_PAY_PRIVATE_KEY_PATH", "")
WECHAT_PAY_PUBLIC_KEY_PATH = os.getenv("WECHAT_PAY_PUBLIC_KEY_PATH", "")
WECHAT_PAY_NOTIFY_URL = os.getenv("WECHAT_PAY_NOTIFY_URL", "")
WECHAT_PAY_API_BASE_URL = os.getenv("WECHAT_PAY_API_BASE_URL", "https://api.mch.weixin.qq.com")
WECHAT_PAY_SKIP_NOTIFY_VERIFY = os.getenv("WECHAT_PAY_SKIP_NOTIFY_VERIFY", "0") == "1"


@dataclass(frozen=True)
class OSSSettings:
    endpoint: str
    internal_endpoint: str
    use_internal: bool
    bucket_name: str
    access_key_id: str
    access_key_secret: str
    public_base_url: str
    upload_prefix: str

    @property
    def is_configured(self) -> bool:
        return all(
            [
                self.endpoint,
                self.bucket_name,
                self.access_key_id,
                self.access_key_secret,
            ]
        )

    @property
    def upload_endpoint(self) -> str:
        if self.use_internal and self.internal_endpoint:
            return self.internal_endpoint
        return self.endpoint


oss_settings = OSSSettings(
    endpoint=OSS_ENDPOINT,
    internal_endpoint=OSS_INTERNAL_ENDPOINT,
    use_internal=OSS_USE_INTERNAL,
    bucket_name=OSS_BUCKET_NAME,
    access_key_id=OSS_ACCESS_KEY_ID,
    access_key_secret=OSS_ACCESS_KEY_SECRET,
    public_base_url=OSS_PUBLIC_BASE_URL,
    upload_prefix=OSS_UPLOAD_PREFIX,
)


@dataclass(frozen=True)
class AuthSettings:
    require_https: bool
    allow_insecure_local: bool
    cookie_secure: bool


auth_settings = AuthSettings(
    require_https=AUTH_REQUIRE_HTTPS,
    allow_insecure_local=AUTH_ALLOW_INSECURE_LOCAL,
    cookie_secure=AUTH_COOKIE_SECURE,
)


@dataclass(frozen=True)
class WeChatPaySettings:
    appid: str
    mch_id: str
    mch_serial_no: str
    api_v3_key: str
    private_key_path: str
    public_key_path: str
    notify_url: str
    api_base_url: str
    skip_notify_verify: bool

    @property
    def is_configured(self) -> bool:
        return all(
            [
                self.appid,
                self.mch_id,
                self.mch_serial_no,
                self.api_v3_key,
                self.private_key_path,
                self.notify_url,
            ]
        )


wechat_pay_settings = WeChatPaySettings(
    appid=WECHAT_PAY_APPID,
    mch_id=WECHAT_PAY_MCH_ID,
    mch_serial_no=WECHAT_PAY_MCH_SERIAL_NO,
    api_v3_key=WECHAT_PAY_API_V3_KEY,
    private_key_path=WECHAT_PAY_PRIVATE_KEY_PATH,
    public_key_path=WECHAT_PAY_PUBLIC_KEY_PATH,
    notify_url=WECHAT_PAY_NOTIFY_URL,
    api_base_url=WECHAT_PAY_API_BASE_URL,
    skip_notify_verify=WECHAT_PAY_SKIP_NOTIFY_VERIFY,
)