import type { NextApiRequest, NextApiResponse } from 'next'
import { prisma } from '@/lib/prisma'
import { requireAuth, logAction, generateRef } from '@/lib/auth'
import { NCRSeverity, EscapeStatus } from '@prisma/client'

export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  const user = await requireAuth(req, res, ['ADMIN', 'QC'])
  if (!user) return

  const { id } = req.query as { id: string }

  const escape = await prisma.qualityEscape.findUnique({
    where: { id },
    include: { shipment: true, capa: { select: { ref: true } } },
  })
  if (!escape) return res.status(404).json({ error: 'Escape not found' })

  if (req.method === 'GET') {
    return res.json({ data: escape })
  }

  if (req.method === 'PATCH') {
    const before = { ...escape }
    const { severity, status, resolution, category, standardItem, escalate, capaForm } = req.body as {
      severity?: NCRSeverity
      status?: EscapeStatus
      resolution?: string
      category?: string
      standardItem?: string
      escalate?: boolean
      capaForm?: { title: string; priority: string; ownerId: string; dueDate: string }
    }

    const updateData: any = {}
    if (severity !== undefined) updateData.severity = severity
    if (status !== undefined) updateData.status = status

    if (resolution !== undefined && category !== undefined) {
      updateData.resolution = resolution
      updateData.category = category
      updateData.status = 'RESOLVED'
      updateData.resolvedAt = new Date()
    }

    if (standardItem !== undefined) {
      updateData.standardItemAdded = standardItem || '—'
      if (standardItem) {
        const maxOrder = await prisma.shippingStandardItem.count()
        await prisma.shippingStandardItem.create({
          data: { text: standardItem, source: escape.ref, order: maxOrder },
        })
      }
    }

    let capaRef: string | undefined
    if (escalate && capaForm) {
      const count = await prisma.cAPA.count()
      capaRef = generateRef('CAPA', count)
      const capa = await prisma.cAPA.create({
        data: {
          ref: capaRef, title: capaForm.title,
          description: `Client-reported quality escape ${escape.ref} (${escape.shipment.ref}): ${escape.description}`,
          priority: capaForm.priority as any,
          ownerId: capaForm.ownerId, raisedById: user.id,
          dueDate: new Date(capaForm.dueDate),
        },
      })
      await prisma.cAPAEvent.create({
        data: { capaId: capa.id, event: 'CAPA raised', note: `Escalated from quality escape ${escape.ref} by ${user.name}` }
      })
      updateData.status = 'ESCALATED'
      updateData.capaId = capa.id
    }

    const updated = await prisma.qualityEscape.update({
      where: { id },
      data: updateData,
      include: { shipment: true, capa: { select: { ref: true } } },
    })

    // File to resolutions library
    if (resolution !== undefined && category !== undefined) {
      await prisma.resolution.create({
        data: {
          title: escape.description.length > 80 ? escape.description.slice(0, 80) + '…' : escape.description,
          category, resolution, linkedRef: escape.ref,
        }
      })
    }

    await logAction(user.id, 'UPDATE', 'QualityEscape', id, before, updated)
    return res.json({ data: updated })
  }

  res.status(405).end()
}