"""Reference data: languages, countries, certifications."""

from __future__ import annotations

from sqlalchemy import ForeignKey, String, Text, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.models.base import Base, TimestampMixin, UUIDPrimaryKeyMixin


class Language(Base):
    """ISO 639-1 language codes (e.g. 'en', 'ja')."""

    __tablename__ = "languages"

    code: Mapped[str] = mapped_column(String(10), primary_key=True)
    english_name: Mapped[str] = mapped_column(String(200), nullable=False)
    native_name: Mapped[str | None] = mapped_column(String(200), nullable=True)


class Country(Base):
    """ISO 3166-1 alpha-2 country codes (e.g. 'US', 'GB')."""

    __tablename__ = "countries"

    code: Mapped[str] = mapped_column(String(2), primary_key=True)
    name: Mapped[str] = mapped_column(String(200), nullable=False)


class Certification(Base, UUIDPrimaryKeyMixin, TimestampMixin):
    """Content rating within a country's rating system, e.g. US/MPA/PG-13."""

    __tablename__ = "certifications"
    __table_args__ = (
        UniqueConstraint("country_code", "system", "rating", name="uq_certification_scope"),
    )

    country_code: Mapped[str] = mapped_column(ForeignKey("countries.code"), nullable=False)
    system: Mapped[str] = mapped_column(String(50), nullable=False)  # e.g. "MPA", "BBFC"
    rating: Mapped[str] = mapped_column(String(20), nullable=False)  # e.g. "PG-13"
    meaning: Mapped[str | None] = mapped_column(Text, nullable=True)

    country: Mapped[Country] = relationship()


__all__ = ["Language", "Country", "Certification"]