const { DataTypes } = require('sequelize');
const { sequelize } = require('../db');
const Device = require('./Device');

const Cable = sequelize.define('Cable', {
  cableId: {
    type: DataTypes.STRING,
    primaryKey: true,
    allowNull: false,
    unique: true
  },
  sourceDeviceId: {
    type: DataTypes.STRING,
    allowNull: false,
    references: {
      model: 'devices',
      key: 'deviceId'
    }
  },
  sourcePort: {
    type: DataTypes.STRING,
    allowNull: false
  },
  targetDeviceId: {
    type: DataTypes.STRING,
    allowNull: false,
    references: {
      model: 'devices',
      key: 'deviceId'
    }
  },
  targetPort: {
    type: DataTypes.STRING,
    allowNull: false
  },
  cableType: {
    type: DataTypes.ENUM('ethernet', 'fiber', 'copper'),
    defaultValue: 'ethernet',
    allowNull: false
  },
  cableLength: {
    type: DataTypes.DECIMAL(5, 2),
    allowNull: true
  },
  status: {
    type: DataTypes.ENUM('normal', 'fault', 'disconnected'),
    defaultValue: 'normal',
    allowNull: false
  },
  description: {
    type: DataTypes.TEXT,
    allowNull: true
  }
}, {
  tableName: 'cables',
  timestamps: true,
  indexes: [
    { fields: ['sourceDeviceId'] },
    { fields: ['targetDeviceId'] },
    { fields: ['status'] },
    { fields: ['cableType'] },
    { fields: ['sourceDeviceId', 'targetDeviceId'] }
  ]
});

Cable.belongsTo(Device, { foreignKey: 'sourceDeviceId', as: 'sourceDevice' });
Cable.belongsTo(Device, { foreignKey: 'targetDeviceId', as: 'targetDevice' });

module.exports = Cable;