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

class User(UserMixin, db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    password_hash = db.Column(db.String(128))
    is_admin = db.Column(db.Boolean, default=False, nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    
    # Beziehungen
    saved_queries = db.relationship('SavedQuery', backref='user', lazy=True, cascade='all, delete-orphan')
    
    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}>'

class SavedQuery(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(200), nullable=False)
    description = db.Column(db.Text)
    query_text = db.Column('query', db.Text, nullable=False)  # Expliziter Spaltenname 'query', Attribut 'query_text'
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    def to_dict(self):
        return {
            'id': self.id,
            'name': self.name,
            'description': self.description,
            'query': self.query_text,
            'created_at': self.created_at.isoformat(),
            'updated_at': self.updated_at.isoformat()
        }
    
    def __repr__(self):
        return f'<SavedQuery {self.name}>'

class DatabaseConnection(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    host = db.Column(db.String(200))
    port = db.Column(db.Integer)
    database = db.Column(db.String(100))
    username = db.Column(db.String(100))
    password = db.Column(db.String(200))  # In Produktion sollte dies verschlüsselt werden
    db_type = db.Column(db.String(50))  # mysql, postgresql, sqlite, etc.
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    
    def to_dict(self):
        return {
            'id': self.id,
            'name': self.name,
            'host': self.host,
            'port': self.port,
            'database': self.database,
            'username': self.username,
            'db_type': self.db_type
        }
    
    def __repr__(self):
        return f'<DatabaseConnection {self.name}>'