"""FluentGerman.ai — Database models."""

import enum
from datetime import datetime, timezone

from sqlalchemy import Boolean, DateTime, Enum, ForeignKey, String, Text
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


class InstructionType(str, enum.Enum):
    GLOBAL = "global"
    PERSONAL = "personal"
    HOMEWORK = "homework"


class User(Base):
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(primary_key=True)
    username: Mapped[str] = mapped_column(String(50), unique=True, index=True)
    email: Mapped[str] = mapped_column(String(255), unique=True, index=True)
    hashed_password: Mapped[str] = mapped_column(String(255))
    is_admin: Mapped[bool] = mapped_column(Boolean, default=False)
    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )

    instructions: Mapped[list["Instruction"]] = relationship(
        back_populates="user", cascade="all, delete-orphan"
    )


class Instruction(Base):
    __tablename__ = "instructions"

    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[int | None] = mapped_column(
        ForeignKey("users.id", ondelete="CASCADE"), nullable=True, index=True
    )
    title: Mapped[str] = mapped_column(String(200))
    content: Mapped[str] = mapped_column(Text)
    type: Mapped[InstructionType] = mapped_column(
        Enum(InstructionType), default=InstructionType.PERSONAL
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc)
    )

    user: Mapped[User | None] = relationship(back_populates="instructions")