from datetime import datetime
from typing import Optional

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

from .base import Base, TimestampMixin


class User(Base, TimestampMixin):
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    username: Mapped[str] = mapped_column(String(100), unique=True, nullable=False, index=True)
    email: Mapped[Optional[str]] = mapped_column(String(255), unique=True, nullable=True)
    full_name: Mapped[Optional[str]] = mapped_column(String(255), nullable=True)
    password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
    role: Mapped[str] = mapped_column(String(20), nullable=False, default="operator")
    is_active: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)

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


class UserSession(Base):
    __tablename__ = "user_sessions"

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    user_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    refresh_token: Mapped[str] = mapped_column(String(512), unique=True, nullable=False, index=True)
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    last_used_at: Mapped[Optional[datetime]] = mapped_column(DateTime(timezone=True), nullable=True)
    user_agent: Mapped[Optional[str]] = mapped_column(String(500), nullable=True)
    ip_address: Mapped[Optional[str]] = mapped_column(String(45), nullable=True)

    user: Mapped["User"] = relationship("User", back_populates="sessions")