"""BoardImage junction model."""

import uuid
from datetime import datetime

from sqlalchemy import Column, DateTime, ForeignKey, Integer, UniqueConstraint
from sqlalchemy.dialects.postgresql import JSONB, UUID
from sqlalchemy.orm import relationship

from app.database.base import Base


class BoardImage(Base):
    """Junction table connecting boards and images with position/transformation data."""

    __tablename__ = "board_images"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    board_id = Column(UUID(as_uuid=True), ForeignKey("boards.id", ondelete="CASCADE"), nullable=False, index=True)
    image_id = Column(UUID(as_uuid=True), ForeignKey("images.id", ondelete="CASCADE"), nullable=False, index=True)
    position = Column(JSONB, nullable=False)
    transformations = Column(
        JSONB,
        nullable=False,
        default={
            "scale": 1.0,
            "rotation": 0,
            "opacity": 1.0,
            "flipped_h": False,
            "flipped_v": False,
            "greyscale": False,
        },
    )
    z_order = Column(Integer, nullable=False, default=0, index=True)
    group_id = Column(UUID(as_uuid=True), ForeignKey("groups.id", ondelete="SET NULL"), nullable=True, index=True)
    created_at = Column(DateTime, nullable=False, default=datetime.utcnow)
    updated_at = Column(DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow)

    __table_args__ = (UniqueConstraint("board_id", "image_id", name="uq_board_image"),)

    # Relationships
    board = relationship("Board", back_populates="board_images")
    image = relationship("Image", back_populates="board_images")
    group = relationship("Group", back_populates="board_images")

    def __repr__(self) -> str:
        return f"<BoardImage(board_id={self.board_id}, image_id={self.image_id})>"