from sqlalchemy import Column, Integer, String, DateTime, Enum as SAEnum, Boolean
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from database import Base


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    phone = Column(String(20), unique=True, index=True, nullable=False)
    password_hash = Column(String(255), nullable=False)
    name = Column(String(50), nullable=False)
    avatar = Column(String(500), default="")
    subject = Column(String(50), default="")
    school = Column(String(100), default="")
    grade = Column(String(50), default="")
    role = Column(SAEnum("teacher", "admin", name="user_role"), default="teacher")
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, server_default=func.now())
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())

    coursewares = relationship("Courseware", back_populates="author", lazy="selectin")
    animations = relationship("Animation", back_populates="author", lazy="selectin")
    exercises = relationship("Exercise", back_populates="author", lazy="selectin")
    lesson_plans = relationship("LessonPlan", back_populates="author", lazy="selectin")
    essay_grades = relationship("EssayGrade", back_populates="author", lazy="selectin", cascade="all, delete-orphan")
    resources = relationship("Resource", back_populates="author", lazy="selectin")
    materials = relationship("Material", back_populates="author", lazy="selectin", cascade="all, delete-orphan")
    resource_favorites = relationship("ResourceFavorite", back_populates="user", lazy="selectin", cascade="all, delete-orphan")
    posts = relationship("Post", back_populates="author", lazy="selectin")
    credit_account = relationship("CreditAccount", back_populates="user", uselist=False, lazy="selectin", cascade="all, delete-orphan")
    credit_transactions = relationship("CreditTransaction", back_populates="user", lazy="selectin", cascade="all, delete-orphan")
    mind_maps = relationship("MindMap", back_populates="author", lazy="selectin", cascade="all, delete-orphan")
    notifications = relationship("Notification", back_populates="user", lazy="selectin", cascade="all, delete-orphan")
    chat_conversations = relationship("ChatConversation", back_populates="author", lazy="selectin", cascade="all, delete-orphan")