"""
Menu ORM model
"""
from sqlalchemy import Column, String, Integer, Boolean, Text, TIMESTAMP, ForeignKey, Index
from sqlalchemy.sql import func
from sqlalchemy.orm import relationship
from app.database import Base


class Menu(Base):
    """Backend menu items"""

    __tablename__ = "menus"

    id = Column(Integer, primary_key=True, autoincrement=True)
    parent_id = Column(Integer, ForeignKey('menus.id', ondelete='CASCADE'), nullable=True, comment="Parent menu ID (NULL for root)")
    name = Column(String(100), nullable=False, comment="Menu name")
    title = Column(String(100), nullable=False, comment="Display title")
    icon = Column(String(100), nullable=True, comment="Icon name (e.g., 'settings', 'database')")
    path = Column(String(255), nullable=True, comment="Route path (e.g., '/admin/celestial-bodies')")
    component = Column(String(255), nullable=True, comment="Component path (e.g., 'admin/CelestialBodies')")
    sort_order = Column(Integer, default=0, nullable=False, comment="Display order (ascending)")
    is_active = Column(Boolean, default=True, nullable=False, comment="Menu active status")
    description = Column(Text, nullable=True, comment="Menu description")
    created_at = Column(TIMESTAMP, server_default=func.now())
    updated_at = Column(TIMESTAMP, server_default=func.now(), onupdate=func.now())

    # Relationships
    children = relationship("Menu", back_populates="parent", cascade="all, delete-orphan")
    parent = relationship("Menu", back_populates="children", remote_side=[id])
    role_menus = relationship("RoleMenu", back_populates="menu", cascade="all, delete-orphan")

    # Indexes
    __table_args__ = (
        Index("idx_menus_parent_id", "parent_id"),
        Index("idx_menus_sort_order", "sort_order"),
    )

    def __repr__(self):
        return f"<Menu(id={self.id}, name='{self.name}', path='{self.path}')>"


class RoleMenu(Base):
    """Role-Menu relationship (which menus each role can access)"""

    __tablename__ = "role_menus"

    id = Column(Integer, primary_key=True, autoincrement=True)
    role_id = Column(Integer, ForeignKey('roles.id', ondelete='CASCADE'), nullable=False)
    menu_id = Column(Integer, ForeignKey('menus.id', ondelete='CASCADE'), nullable=False)
    created_at = Column(TIMESTAMP, server_default=func.now())

    # Relationships
    role = relationship("Role", back_populates="menus")
    menu = relationship("Menu", back_populates="role_menus")

    # Constraints
    __table_args__ = (
        Index("idx_role_menus_role_id", "role_id"),
        Index("idx_role_menus_menu_id", "menu_id"),
    )

    def __repr__(self):
        return f"<RoleMenu(role_id={self.role_id}, menu_id={self.menu_id})>"