from functools import lru_cache

from pydantic import Field, field_validator
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    app_name: str = "Two Wheeler Scorecard API"
    environment: str = "local"
    database_url: str = "sqlite:///./scorecard.db"
    redis_url: str | None = None
    jwt_secret_key: str = "change-me"
    jwt_algorithm: str = "HS256"
    access_token_expire_minutes: int = 60
    default_tenant_id: str = "default"
    default_product_type: str = "TWO_WHEELER_LOAN"
    enable_auth: bool = Field(default=False)

    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8")

    @field_validator("database_url")
    @classmethod
    def normalize_database_url(cls, value: str) -> str:
        if value.startswith("postgresql://"):
            return value.replace("postgresql://", "postgresql+psycopg://", 1)
        return value


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