from datetime import datetime, UTC
from werkzeug.security import generate_password_hash, check_password_hash
from app import db


class User(db.Model):
    """User model"""
    __tablename__ = "users"
    
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(120), unique=True, nullable=False, index=True)
    username = db.Column(db.String(80), unique=True, nullable=False, index=True)
    password_hash = db.Column(db.String(255), nullable=False)
    first_name = db.Column(db.String(50))
    last_name = db.Column(db.String(50))
    is_active = db.Column(db.Boolean, default=True)
    is_admin = db.Column(db.Boolean, default=False)
    created_at = db.Column(db.DateTime, default=lambda: datetime.now(UTC))
    updated_at = db.Column(db.DateTime, default=lambda: datetime.now(UTC), onupdate=lambda: datetime.now(UTC))
    
    # Relationships
    orders = db.relationship("Order", back_populates="user", lazy="dynamic")
    
    def set_password(self, password):
        """Hash and set password"""
        self.password_hash = generate_password_hash(password)
    
    def check_password(self, password):
        """Check if provided password matches hash"""
        return check_password_hash(self.password_hash, password)
    
    def to_dict(self):
        """Convert user to dictionary"""
        return {
            "id": self.id,
            "email": self.email,
            "username": self.username,
            "first_name": self.first_name,
            "last_name": self.last_name,
            "is_active": self.is_active,
            "is_admin": self.is_admin,
            "created_at": self.created_at.isoformat() if self.created_at else None,
            "updated_at": self.updated_at.isoformat() if self.updated_at else None
        }
    
    def __repr__(self):
        return f"<User {self.username}>"