from functools import lru_cache
from pathlib import Path

from pydantic import computed_field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    app_name: str = "Home Automation Backend (Python)"
    app_env: str = "development"
    app_debug: bool = False
    app_host: str = "0.0.0.0"
    app_port: int = 8000

    database_url: str = "sqlite:///./data/app.db"

    ticktick_client_id: str = ""
    ticktick_client_secret: str = ""
    ticktick_redirect_uri: str = ""
    ticktick_token: str = ""

    home_assistant_base_url: str = ""
    home_assistant_auth_token: str = ""
    home_assistant_action_task_project_id: str = ""

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

    @computed_field
    @property
    def is_development(self) -> bool:
        return self.app_env.lower() == "development"

    @computed_field
    @property
    def sqlite_path(self) -> Path | None:
        prefix = "sqlite:///"
        if not self.database_url.startswith(prefix):
            return None
        raw_path = self.database_url[len(prefix) :]
        return Path(raw_path)


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