from sqlalchemy import Float, ForeignKey, String, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from app.core.database import Base


class ScopeInfo(Base):
    """Scope-specific attributes for an AugmentedPart of PartType "Scope".

    One-to-one with AugmentedPart (unique augmented_part_id). Holds fields that
    have no home on AugmentedPart itself; populated by the scope xlsx importer.
    """

    __tablename__ = "scope_infos"
    __table_args__ = (UniqueConstraint("augmented_part_id"),)

    id: Mapped[int] = mapped_column(primary_key=True)
    augmented_part_id: Mapped[int] = mapped_column(
        ForeignKey("augmented_parts.id", ondelete="CASCADE"), nullable=False
    )
    magnification_min: Mapped[float | None] = mapped_column(
        Float, nullable=True, default=None
    )
    magnification_max: Mapped[float | None] = mapped_column(
        Float, nullable=True, default=None
    )
    model_suffix: Mapped[str | None] = mapped_column(
        String, nullable=True, default=None
    )
    # The lens diameter is a descriptive attribute (the "50" in "3-18x50"), not a
    # connection dimension — it has no AttachmentPoint.
    objective_lens_diameter_mm: Mapped[float | None] = mapped_column(
        Float, nullable=True, default=None
    )
    # Kept as the raw string from the sheet (e.g. "0.75", "1/16") so no precision
    # or notation is lost; the parsed thread lives on its own AttachmentPoint.
    objective_thread_pitch: Mapped[str | None] = mapped_column(
        String, nullable=True, default=None
    )