from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_prefix="GG_", env_file=".env", extra="ignore")

    env: str = Field(default="development")
    http_addr: str = Field(default="0.0.0.0:8081")
    grpc_addr: str = Field(default="0.0.0.0:9091")
    nats_url: str = Field(default="nats://localhost:4222")
    stream_name: str = Field(default="GUESTGUARD")
    consumer_durable: str = Field(default="fraud-engine-access")

    # Tier 2 Block G — geolocation enrichment.
    # provider: "auto" picks MaxMind when GG_GEOIP_DB_PATH points to an
    # existing .mmdb, else falls back to the free ip-api.com endpoint.
    # "null" turns geolocation off entirely (useful for tests).
    geoip_provider: str = Field(default="auto")
    geoip_db_path: str | None = Field(default=None)
    # Redis URL for caching geo lookups (30-day TTL). Empty means
    # uncached — every miss hits the upstream resolver.
    redis_url: str = Field(default="redis://redis:6379")

    @property
    def host(self) -> str:
        return self.http_addr.split(":", 1)[0] or "0.0.0.0"

    @property
    def port(self) -> int:
        parts = self.http_addr.rsplit(":", 1)
        if len(parts) == 2 and parts[1].isdigit():
            return int(parts[1])
        return 8081


def load_settings() -> Settings:
    return Settings()