fix: recherche produit via Google Sheets (UGS col C → Shopify ID col A) + fallback Shopify

src/app/api/products/search-sheets/route.ts

@@ -0,0 +1,61 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { getServerSession } from 'next-auth'
+import { authOptions } from '@/lib/auth'
+
+/**
+ * Cherche un produit dans Google Sheets par sa référence (UGS, col C).
+ * Retourne le Shopify ID (col A) et le titre (col D) si trouvé.
+ * Parcourt tous les onglets.
+ */
+export async function GET(req: NextRequest) {
+  const session = await getServerSession(authOptions)
+  if (!session) return NextResponse.json({ found: false }, { status: 401 })
+
+  const { searchParams } = new URL(req.url)
+  const ref = searchParams.get('ref')?.trim()
+  if (!ref) return NextResponse.json({ found: false }, { status: 400 })
+
+  const apiKey = process.env.GOOGLE_API_KEY
+  const sheetId = process.env.GOOGLE_SHEETS_ID
+  if (!apiKey || !sheetId) {
+    return NextResponse.json({ found: false, error: 'GOOGLE_API_KEY et GOOGLE_SHEETS_ID requis' }, { status: 500 })
+  }
+
+  try {
+    // Récupère la liste des onglets
+    const metaRes = await fetch(
+      `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}?key=${apiKey}&fields=sheets.properties.title`,
+    )
+    if (!metaRes.ok) throw new Error(`Sheets metadata error: ${metaRes.status}`)
+    const meta = await metaRes.json()
+    const tabs: string[] = (meta.sheets as Array<{ properties: { title: string } }>).map(
+      s => s.properties.title,
+    )
+
+    for (const tab of tabs) {
+      const range = encodeURIComponent(`${tab}!A2:D`)
+      const res = await fetch(
+        `https://sheets.googleapis.com/v4/spreadsheets/${sheetId}/values/${range}?key=${apiKey}`,
+      )
+      if (!res.ok) continue
+      const data = await res.json()
+      const rows = (data.values ?? []) as string[][]
+
+      for (const row of rows) {
+        const shopifyId = (row[0] ?? '').trim()  // col A = ID Shopify
+        // col C = UGS (index 2 car on commence à A)
+        const ugs = (row[2] ?? '').trim()
+
+        if (ugs.toLowerCase() === ref.toLowerCase() && shopifyId) {
+          const title = (row[3] ?? '').trim()  // col D = Nom
+          return NextResponse.json({ found: true, shopifyId, title })
+        }
+      }
+    }
+
+    return NextResponse.json({ found: false })
+  } catch (err) {
+    const message = err instanceof Error ? err.message : 'Erreur'
+    return NextResponse.json({ found: false, error: message }, { status: 500 })
+  }
+}