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)
    url = db.Column(db.String(255), nullable=True)
    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}>"