"""Tietokantamallit — SQLAlchemy 2.0, Mapped-tyypitys, SQLite."""

from datetime import date

from sqlalchemy import String, Text, Date, create_engine
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, sessionmaker

DATABASE_URL = "sqlite:///./app.db"
engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)


class Base(DeclarativeBase):
    pass


class Todo(Base):
    """Tehtävä — otsikko, kuvaus, deadline, prioriteetti ja status."""

    __tablename__ = "todos"

    id: Mapped[int] = mapped_column(primary_key=True, index=True)
    title: Mapped[str] = mapped_column(String(255))
    description: Mapped[str | None] = mapped_column(Text, default=None)
    due_date: Mapped[date | None] = mapped_column(Date, default=None)
    priority: Mapped[int] = mapped_column(default=1)
    status: Mapped[str] = mapped_column(String(20), default="pending")


Base.metadata.create_all(bind=engine)