Phase2: Invoicecomputation/AdminpricingUI/Ainvoicemgnt

src/app/api/admin/billing/generate/route.ts

@@ -0,0 +1,66 @@
+import { NextResponse } from "next/server";
+import { z } from "zod";
+import { requirePlatformRole } from "@/lib/session";
+import { generateInvoice } from "@/lib/billing";
+import { safeError } from "@/lib/errors";
+
+/**
+ * POST /api/admin/billing/generate
+ *
+ * Compute (and optionally commit) an invoice for an (org, year,
+ * month). Platform-only — this is the testing/admin tool.
+ *
+ * Body:
+ *   {
+ *     zitadelOrgId: string,
+ *     year: number (e.g. 2026),
+ *     month: number (1-12),
+ *     locale?: 'de' | 'en' | 'fr' | 'it',  // default: from country
+ *     dryRun?: boolean                      // default: false
+ *   }
+ *
+ * Response on success:
+ *   {
+ *     draft: InvoiceDraft,           // line breakdown + warnings
+ *     invoice: Invoice | null,       // null when dryRun=true
+ *   }
+ *
+ * If an invoice for that (org, period) already exists, returns
+ * 409 with a clear message. Use the delete endpoint first to
+ * regenerate.
+ */
+
+const bodySchema = z.object({
+  zitadelOrgId: z.string().min(1),
+  year: z.number().int().min(2020).max(2100),
+  month: z.number().int().min(1).max(12),
+  locale: z.enum(["de", "en", "fr", "it"]).optional(),
+  dryRun: z.boolean().optional().default(false),
+});
+
+export async function POST(request: Request) {
+  try {
+    await requirePlatformRole();
+  } catch {
+    return NextResponse.json({ error: "Forbidden" }, { status: 403 });
+  }
+  const body = await request.json().catch(() => ({}));
+  const parsed = bodySchema.safeParse(body);
+  if (!parsed.success) {
+    return NextResponse.json(
+      { error: "Invalid request", details: parsed.error.flatten() },
+      { status: 400 }
+    );
+  }
+  try {
+    const result = await generateInvoice(parsed.data);
+    return NextResponse.json(result);
+  } catch (e: any) {
+    console.error("Invoice generation failed:", e);
+    const msg = safeError(e, "Generation failed");
+    // Specific 409 for the "already exists" case so the UI can
+    // show a "delete first" link.
+    const status = /already exists/i.test(msg) ? 409 : 500;
+    return NextResponse.json({ error: msg }, { status });
+  }
+}