"""User model for authentication."""
from flask_sqlalchemy import SQLAlchemy
from werkzeug.security import generate_password_hash, check_password_hash
from typing import Dict, Any

# Shared db instance for all models
db = SQLAlchemy()

class User(db.Model):
    """User model for authentication."""
    __tablename__ = 'users'
    
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False, index=True)
    email = db.Column(db.String(120), unique=True, nullable=False)
    password_hash = db.Column(db.String(255), nullable=False)
    role = db.Column(db.String(50), nullable=False)  # Fellowship member name
    gold = db.Column(db.Integer, nullable=False, default=500)
    created_at = db.Column(db.DateTime, default=db.func.current_timestamp())
    
    def set_password(self, password: str) -> None:
        """Hash and set password."""
        self.password_hash = generate_password_hash(password, method='pbkdf2:sha256')
    
    def check_password(self, password: str) -> bool:
        """Check if provided password matches hash."""
        return check_password_hash(self.password_hash, password)
    
    def to_dict(self) -> Dict[str, Any]:
        """Convert user to dictionary."""
        return {
            'id': self.id,
            'username': self.username,
            'email': self.email,
            'role': self.role,
            'gold': self.gold,
            'created_at': self.created_at.isoformat() if self.created_at else None
        }
    
    def __repr__(self) -> str:
        return f'<User {self.username}>'