/**
 * GET /api/instances/:id
 * Get instance details
 */
import { query } from '../../../utils/database'
import { baileysManager } from '../../../services/baileys/manager'

interface InstanceRow {
  id: string
  name: string
  phone_number: string | null
  status: string
  qr_code: string | null
  pairing_code: string | null
  last_connected_at: Date | null
  created_by: string
  created_at: Date
}

export default defineEventHandler(async (event) => {
  const username = getHeader(event, 'x-authentik-username')
  if (!username) {
    throw createError({ statusCode: 401, message: 'Unauthorized' })
  }

  const id = getRouterParam(event, 'id')

  const result = await query<InstanceRow>(
    `SELECT id, name, phone_number, status, qr_code, pairing_code,
            last_connected_at, created_by, created_at
     FROM instances WHERE id = $1`,
    [id]
  )

  if (result.rows.length === 0) {
    throw createError({ statusCode: 404, message: 'Instance not found' })
  }

  const instance = result.rows[0]
  const liveStatus = baileysManager.getStatus(instance.id)

  return {
    id: instance.id,
    name: instance.name,
    phoneNumber: instance.phone_number,
    status: liveStatus?.status || instance.status,
    qrCode: liveStatus?.qrCode || instance.qr_code,
    pairingCode: liveStatus?.pairingCode || instance.pairing_code,
    lastConnectedAt: instance.last_connected_at,
    createdBy: instance.created_by,
    createdAt: instance.created_at
  }
})