from flask_login import UserMixin
from werkzeug.security import generate_password_hash, check_password_hash
from app.extensions import db, login_manager
from datetime import datetime


class User(UserMixin, db.Model):
    __tablename__ = 'users'

    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(64), unique=True, nullable=False, index=True)
    email = db.Column(db.String(120), unique=True, nullable=True)
    password_hash = db.Column(db.String(256), nullable=False)
    display_name = db.Column(db.String(100), nullable=True)
    timezone = db.Column(db.String(64), default='Asia/Ho_Chi_Minh')
    currency = db.Column(db.String(10), default='USD')
    currency_symbol = db.Column(db.String(5), default='$')
    groq_model = db.Column(db.String(64), default='llama-3.3-70b-versatile')
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    last_login = db.Column(db.DateTime, nullable=True)

    def set_password(self, password):
        self.password_hash = generate_password_hash(password)

    def check_password(self, password):
        return check_password_hash(self.password_hash, password)

    def __repr__(self):
        return f'<User {self.username}>'


@login_manager.user_loader
def load_user(user_id):
    return db.session.get(User, int(user_id))