from datetime import datetime
from sqlalchemy import String, Text, Boolean, ForeignKey, Integer, DateTime, func, Table, Column
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.models.database import Base

role_permissions = Table(
    "role_permissions",
    Base.metadata,
    Column("role_id", Integer, ForeignKey("roles.id", ondelete="CASCADE"), primary_key=True),
    Column("permission_id", Integer, ForeignKey("permissions.id", ondelete="CASCADE"), primary_key=True),
)


class Role(Base):
    __tablename__ = "roles"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    name: Mapped[str] = mapped_column(String(100), unique=True, nullable=False)
    all_permissions: Mapped[bool] = mapped_column(Boolean, default=False)
    description: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())

    permissions = relationship("Permission", secondary=role_permissions, back_populates="roles")


class Permission(Base):
    __tablename__ = "permissions"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(100), unique=True, nullable=False)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    module: Mapped[str] = mapped_column(String(100), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())

    roles = relationship("Role", secondary=role_permissions, back_populates="permissions")