"""Application settings."""

from functools import lru_cache
from pathlib import Path

from pydantic_settings import BaseSettings, SettingsConfigDict

PROJECT_ROOT = Path(__file__).resolve().parents[2]


class Settings(BaseSettings):
    """Runtime settings loaded from environment variables."""

    app_name: str = "temporal-image-pipeline"
    api_prefix: str = "/api/v1"
    debug: bool = False
    auto_create_tables: bool = True
    database_url: str = "sqlite+aiosqlite:///./temporal_demo.db"
    temporal_address: str = "localhost:7233"
    temporal_namespace: str = "default"
    s3_access_key: str = ""
    s3_secret_key: str = ""
    s3_bucket: str = ""
    s3_region: str = ""
    s3_endpoint: str = ""
    s3_cname: str = ""
    s3_presign_expiry_seconds: int = 900
    image_generation_provider: str = "mock"
    gemini_api_key: str = ""
    gemini_base_url: str = "https://api.museidea.com/v1beta"
    gemini_model: str = "gemini-3.1-flash-image-preview"
    gemini_timeout_seconds: int = 300
    gemini_max_attempts: int = 2

    model_config = SettingsConfigDict(
        env_file=PROJECT_ROOT / ".env",
        env_file_encoding="utf-8",
        case_sensitive=False,
        extra="ignore",
    )

    @property
    def sync_database_url(self) -> str:
        """Return a synchronous SQLAlchemy URL for migrations."""

        return self.database_url.replace("+aiosqlite", "")


@lru_cache(maxsize=1)
def get_settings() -> Settings:
    """Return the cached application settings."""

    return Settings()