import uuid
from sqlalchemy import Column, DateTime, func, ForeignKey, UniqueConstraint
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import relationship
from app.config.database import Base

class RoleModuleAccess(Base):
    __tablename__ = "role_module_accesses"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    role_id = Column(UUID(as_uuid=True), ForeignKey("roles.id"), nullable=False, index=True)
    module_access_id = Column(UUID(as_uuid=True), ForeignKey("module_accesses.id"), nullable=False, index=True)
    
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    role = relationship("Role", back_populates="role_module_accesses")
    module_access = relationship("ModuleAccess", back_populates="role_module_accesses")

    __table_args__ = (
        UniqueConstraint('role_id', 'module_access_id', name='uq_role_module_access'),
    )

    def __repr__(self):
        return f"<RoleModuleAccess role={self.role_id} access={self.module_access_id}>"