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

# User model has been moved to app.core.auth
# Import it from there instead if needed: from app.core.auth import User

class Port(db.Model):
    __tablename__ = 'ports'
    
    id = db.Column(db.Integer, primary_key=True)
    app_id = db.Column(db.Integer, db.ForeignKey('apps.id', ondelete='CASCADE'), nullable=False)
    port_number = db.Column(db.Integer, nullable=False)
    protocol = db.Column(db.String(10), default='TCP')  # TCP, UDP, etc.
    description = db.Column(db.String(200))
    
    # Relationship
    app = db.relationship('App', back_populates='ports')
    
    def __repr__(self):
        return f'<Port {self.port_number}/{self.protocol}>'

class Server(db.Model):
    __tablename__ = 'servers'
    
    id = db.Column(db.Integer, primary_key=True)
    hostname = db.Column(db.String(64), nullable=False)
    ip_address = db.Column(db.String(39), nullable=False)  # IPv4 or IPv6
    subnet_id = db.Column(db.Integer, db.ForeignKey('subnets.id'), nullable=False)
    documentation = db.Column(db.Text)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Relationships
    subnet = db.relationship('Subnet', back_populates='servers')
    apps = db.relationship('App', back_populates='server', cascade='all, delete-orphan')
    
    def __repr__(self):
        return f'<Server {self.hostname}>'

class Subnet(db.Model):
    __tablename__ = 'subnets'
    
    id = db.Column(db.Integer, primary_key=True)
    cidr = db.Column(db.String(18), unique=True, nullable=False)  # e.g., 192.168.1.0/24
    location = db.Column(db.String(64))
    active_hosts = db.Column(db.Text)  # Store as JSON string
    last_scanned = db.Column(db.DateTime)
    auto_scan = db.Column(db.Boolean, default=False)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Relationships
    servers = db.relationship('Server', back_populates='subnet')
    
    def __repr__(self):
        return f'<Subnet {self.cidr}>'
    
    @property
    def used_ips(self):
        """Number of IPs used in this subnet (servers)"""
        return len(self.servers)
    
    # Getter and setter for active_hosts as JSON
    @property
    def active_hosts_list(self):
        if not self.active_hosts:
            return []
        return json.loads(self.active_hosts)
    
    @active_hosts_list.setter
    def active_hosts_list(self, hosts):
        self.active_hosts = json.dumps(hosts)

class App(db.Model):
    __tablename__ = 'apps'
    
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(64), nullable=False)
    server_id = db.Column(db.Integer, db.ForeignKey('servers.id'), nullable=False)
    documentation = db.Column(db.Text)
    created_at = db.Column(db.DateTime, default=datetime.utcnow)
    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Relationships
    server = db.relationship('Server', back_populates='apps')
    ports = db.relationship('Port', back_populates='app', cascade='all, delete-orphan')
    
    def __repr__(self):
        return f'<App {self.name}>'