from datetime import datetime, timezone
from typing import List, Optional

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

from database import Base


class User(Base):
    __tablename__ = "users"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
    username: Mapped[str] = mapped_column(String(150), unique=True, index=True, nullable=False)
    hashed_password: Mapped[str] = mapped_column(String(255), nullable=False)

    # Relationships
    reviews: Mapped[List["Review"]] = relationship(
        "Review",
        back_populates="user",
        cascade="all, delete-orphan",
        passive_deletes=True,
    )

    def __repr__(self) -> str:
        return f"<User id={self.id} username={self.username!r}>"


class ReviewAspect(Base):
    __tablename__ = "review_aspects"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
    review_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("reviews.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    aspect: Mapped[str] = mapped_column(String(100), nullable=False)
    sentiment: Mapped[str] = mapped_column(String(50), nullable=False)

    # Relationships
    review: Mapped["Review"] = relationship("Review", back_populates="aspects")

    def __repr__(self) -> str:
        return f"<ReviewAspect id={self.id} review_id={self.review_id} aspect={self.aspect!r} sentiment={self.sentiment!r}>"


class Review(Base):
    __tablename__ = "reviews"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
    user_id: Mapped[int] = mapped_column(
        Integer,
        ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    review_text: Mapped[str] = mapped_column(Text, nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        default=lambda: datetime.now(timezone.utc),
        nullable=False,
    )

    # Relationships
    user: Mapped["User"] = relationship("User", back_populates="reviews")
    aspects: Mapped[List["ReviewAspect"]] = relationship(
        "ReviewAspect",
        back_populates="review",
        cascade="all, delete-orphan",
        passive_deletes=True,
    )

    def __repr__(self) -> str:
        return f"<Review id={self.id}>"