import enum
from uuid import uuid4

from sqlalchemy import Boolean, Column, DateTime, Enum, String, Text
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.core.database import Base


class UserRole(enum.Enum):
    CUSTOMER = "customer"
    SELLER = "seller"
    ADMIN = "admin"

class User(Base):
    __tablename__ = "users"

    id = Column(String(36), primary_key=True, default=lambda: str(uuid4()))
    email = Column(String(255), unique=True, index=True, nullable=False)
    hashed_password = Column(String(255), nullable=False)
    first_name = Column(String(100), nullable=True)
    last_name = Column(String(100), nullable=True)
    is_active = Column(Boolean, default=True)
    role = Column(Enum(UserRole), default=UserRole.CUSTOMER)
    phone_number = Column(String(20), nullable=True)
    profile_image = Column(String(255), nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    # Relationships
    orders = relationship("Order", back_populates="user")
    reviews = relationship("Review", back_populates="user")
    cart_items = relationship("CartItem", back_populates="user")

    # For sellers: products they are selling
    products = relationship("Product", back_populates="seller")

    # Address information (simplified - in a real app you'd likely have a separate table)
    address_line1 = Column(String(255), nullable=True)
    address_line2 = Column(String(255), nullable=True)
    city = Column(String(100), nullable=True)
    state = Column(String(100), nullable=True)
    postal_code = Column(String(20), nullable=True)
    country = Column(String(100), nullable=True)

    # Additional fields
    email_verified = Column(Boolean, default=False)
    verification_token = Column(String(255), nullable=True)
    reset_password_token = Column(String(255), nullable=True)
    reset_token_expires_at = Column(DateTime(timezone=True), nullable=True)
    bio = Column(Text, nullable=True)

    def __repr__(self):
        return f"<User {self.email}>"