from functools import lru_cache

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        extra="ignore",
    )

    app_name: str = "Payment Processing Service"
    api_key: str = Field(default="change-me", min_length=1)
    database_url: str = "postgresql+asyncpg://payments:payments@localhost:5432/payments"
    rabbitmq_url: str = "amqp://guest:guest@localhost:5672/"
    outbox_poll_interval: float = Field(default=1.0, gt=0)
    outbox_batch_size: int = Field(default=100, gt=0)
    outbox_publish_timeout: float = Field(default=10.0, gt=0)
    processing_min_seconds: float = Field(default=2.0, ge=0)
    processing_max_seconds: float = Field(default=5.0, ge=0)
    processing_success_rate: float = Field(default=0.9, ge=0, le=1)
    processing_max_attempts: int = Field(default=3, ge=1)
    retry_base_delay: float = Field(default=1.0, ge=0)
    webhook_timeout: float = Field(default=10.0, gt=0)


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


settings = get_settings()