"""Device model"""
from sqlalchemy import Column, String, Integer, ForeignKey, Boolean, Index, Enum
from sqlalchemy.orm import relationship
from app.models.base import BaseModel
import enum


class DeviceOSType(str, enum.Enum):
    """Supported Cisco OS versions"""
    IOS = "ios"
    IOS_XE = "ios_xe"
    IOS_XR = "ios_xr"


class Device(BaseModel):
    """Network device (Cisco switch/router)"""
    __tablename__ = "devices"
    __table_args__ = (
        Index("ix_devices_project_id", "project_id"),
        Index("ix_devices_hostname", "hostname"),
    )
    
    project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)
    hostname = Column(String(255), nullable=False)
    ip_address = Column(String(15), nullable=False)  # IPv4 or FQDN
    os_type = Column(Enum(DeviceOSType), default=DeviceOSType.IOS, nullable=False)
    model = Column(String(255), nullable=True)  # e.g., "Catalyst 2960"
    
    # SSH connectivity (optional, used only for push)
    # WARNING: Never store plain passwords in database
    ssh_username = Column(String(255), nullable=True)
    ssh_port = Column(Integer, default=22, nullable=False)
    
    is_active = Column(Boolean, default=True, nullable=False)
    
    # Relationships
    project = relationship("Project", back_populates="devices")
    configurations = relationship("Configuration", back_populates="device", cascade="all, delete-orphan")
    push_logs = relationship("PushLog", back_populates="device", cascade="all, delete-orphan")
    
    def __repr__(self):
        return f"<Device {self.hostname} ({self.ip_address})>"