nextjs-app/src/app/api/stocks/route.ts

import { NextRequest, NextResponse } from 'next/server'

import { apiUrl, API_BASE } from '@/lib/runtime-config'
import { requireAuth } from '@/lib/api-auth'
import { apiError, ApiErrors } from '@/lib/api-response'

export const dynamic = 'force-dynamic'

export async function GET(req: NextRequest) {
  const auth = await requireAuth(req)
  if (!auth.authenticated) return auth.response

  try {
    const { searchParams } = new URL(req.url)
    const limitRaw = searchParams.get('limit')
    const sourceRaw = searchParams.get('source')

    const limit = Math.max(1, Math.min(Number(limitRaw || 100) || 100, 300))
    const source = (sourceRaw || 'live').trim()

    const qs = new URLSearchParams({ limit: String(limit), source })

    const controller = new AbortController()
    const timeout = setTimeout(() => controller.abort(), 30000)

    let resp: Response
    try {
      resp = await fetch(`${apiUrl('/api/stocks')}?${qs.toString()}`, {
        headers: { accept: 'application/json' },
        next: { revalidate: 300 },
        signal: controller.signal,
      })
    } finally {
      clearTimeout(timeout)
    }

    if (!resp.ok) {
      return apiError(`Stocks backend failed (HTTP ${resp.status})`, 502, { data: [] })
    }

    const payload = await resp.json().catch(() => null)
    if (!payload) {
      return apiError('Invalid payload from stocks backend', 502, { data: [] })
    }

    if (Array.isArray(payload)) {
      return NextResponse.json(payload, { status: 200 })
    }

    // Fallback: if backend returns an object with `data`.
    const payloadObj = payload as Record<string, unknown>
    if (Array.isArray(payloadObj?.data)) {
      return NextResponse.json(payloadObj.data as unknown[], { status: 200 })
    }

      return apiError('Unexpected payload format from stocks backend', 502, { data: [] })
  } catch (e: unknown) {
    const message = e instanceof Error ? e.message : 'Unknown'
      return apiError(`Stocks fetch failed: ${message}`, 502, { data: [] })
  }
}