from sqlalchemy import Column, DateTime, ForeignKey, Integer, String, Text, text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from backend.app.db.base import Base


class User(Base):
    __tablename__ = "users"

    id = Column(UUID(as_uuid=True), primary_key=True, server_default=text("gen_random_uuid()"))
    name = Column(String, nullable=False)
    account = Column(String, unique=True, nullable=False)
    phone = Column(String)
    title = Column(String)
    avatar = Column(Text)
    external_user_id = Column(String)
    tenant_id = Column(String)
    tenant_name = Column(String)
    hosp_id = Column(String)
    hosp_name = Column(String)
    role_id = Column(UUID(as_uuid=True), ForeignKey("roles.id", ondelete="RESTRICT"), nullable=False)
    campus_id = Column(UUID(as_uuid=True), ForeignKey("campuses.id", ondelete="SET NULL"))
    dept_id = Column(UUID(as_uuid=True), ForeignKey("departments.id", ondelete="SET NULL"))
    status = Column(String, nullable=False, server_default="active")
    password_hash = Column(String, nullable=False)
    token_version = Column(Integer, nullable=False, server_default="1")
    created_at = Column(DateTime(timezone=True), server_default=func.now(), nullable=False)
    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now(), nullable=False)

    role = relationship("Role", lazy="joined")
    campus = relationship("Campus", lazy="joined")
    department = relationship("Department", lazy="joined")