from datetime import datetime
from enum import Enum
from flask_sqlalchemy import SQLAlchemy
from flask_login import UserMixin
from werkzeug.security import generate_password_hash, check_password_hash
from app.config.database import db


class UserRole(Enum):
    """User role enumeration for role-based access control."""

    VIEWER = "viewer"
    USER = "user"
    ADMIN = "admin"


class User(UserMixin, db.Model):
    """User model for authentication and authorization."""

    __tablename__ = "users"

    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(50), unique=True, nullable=False)
    email = db.Column(db.String(100), unique=True, nullable=False)
    password_hash = db.Column(db.String(255), nullable=False)
    user_level = db.Column(db.String(20), nullable=False)
    preferred_language = db.Column(db.String(5), default="en")
    preferred_theme = db.Column(db.String(10), default="light")
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    last_login = db.Column(db.DateTime)
    is_active = db.Column(db.Boolean, default=True)

    # Relationships
    user_projects = db.relationship("UserProject", backref="user", lazy=True)
    user_script_tags = db.relationship("UserScriptTag", backref="user", lazy=True)
    execution_logs = db.relationship("ExecutionLog", backref="user", lazy=True)

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

    def check_password(self, password):
        """Check password against hash."""
        return check_password_hash(self.password_hash, password)

    def get_id(self):
        """Return user ID as string for Flask-Login."""
        return str(self.id)

    def to_dict(self):
        """Convert user to dictionary."""
        return {
            "id": self.id,
            "username": self.username,
            "email": self.email,
            "user_level": self.user_level,
            "preferred_language": self.preferred_language,
            "preferred_theme": self.preferred_theme,
            "created_at": self.created_at.isoformat() if self.created_at else None,
            "last_login": self.last_login.isoformat() if self.last_login else None,
            "is_active": self.is_active,
        }