/**
 * POST /api/instances/:id/pairing-code
 * Request a pairing code for connection without QR
 */
import { query } from '../../../utils/database'
import { baileysManager } from '../../../services/baileys/manager'

interface PairingCodeBody {
  phoneNumber: string
}

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 body = await readBody<PairingCodeBody>(event)

  if (!body.phoneNumber?.trim()) {
    throw createError({ statusCode: 400, message: 'Phone number is required' })
  }

  // Clean phone number (remove +, spaces, dashes)
  const cleanPhone = body.phoneNumber.replace(/[^0-9]/g, '')

  // Check if instance exists
  const result = await query<{ id: string; status: string }>(
    'SELECT id, status FROM instances WHERE id = $1',
    [id]
  )

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

  const instance = result.rows[0]

  if (instance.status === 'connected') {
    throw createError({ statusCode: 400, message: 'Instance already connected' })
  }

  try {
    // Connect with pairing code mode
    await baileysManager.connect(id!, true, cleanPhone)

    // Wait for pairing code
    await new Promise(resolve => setTimeout(resolve, 5000))

    const pairingCode = baileysManager.getPairingCode(id!)
    const status = baileysManager.getStatus(id!)

    if (!pairingCode) {
      throw new Error('Failed to generate pairing code')
    }

    return {
      success: true,
      code: pairingCode,
      status: status?.status || 'pairing'
    }
  } catch (error) {
    throw createError({
      statusCode: 500,
      message: `Failed to request pairing code: ${(error as Error).message}`
    })
  }
})