From 11658bce2df0c15fcc17c6d65e41eb21160537ae Mon Sep 17 00:00:00 2001
From: DEls <davide.els1@outlook.com>
Date: Fri, 28 Aug 2026 13:01:58 +0200
Subject: [PATCH] feat(api): POST /api/sites/[id]/fixed-costs

---
 src/app/api/sites/[id]/fixed-costs/route.ts | 66 +++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 src/app/api/sites/[id]/fixed-costs/route.ts

diff --git a/src/app/api/sites/[id]/fixed-costs/route.ts b/src/app/api/sites/[id]/fixed-costs/route.ts
new file mode 100644
index 0000000..715d799
--- /dev/null
+++ b/src/app/api/sites/[id]/fixed-costs/route.ts
@@ -0,0 +1,66 @@
+import { NextResponse } from "next/server";
+import { pbAdmin } from "@/lib/pb";
+
+const ISO_DATE = /^\d{4}-\d{2}-\d{2}$/;
+
+function badRequest(field: string, message: string) {
+  return NextResponse.json({ error: "validation", field, message }, { status: 400 });
+}
+
+export async function POST(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> },
+) {
+  const { id } = await params;
+
+  let body: Record<string, unknown>;
+  try {
+    body = await request.json();
+  } catch {
+    return NextResponse.json({ error: "Body must be JSON" }, { status: 400 });
+  }
+
+  const description = typeof body.description === "string" ? body.description.trim() : "";
+  if (!description) return badRequest("description", "Description is required.");
+  if (description.length > 200) return badRequest("description", "Description must be 200 characters or fewer.");
+
+  const costNum = typeof body.cost === "number" ? body.cost : Number(body.cost);
+  if (!Number.isFinite(costNum) || costNum <= 0) {
+    return badRequest("cost", "Cost must be greater than zero.");
+  }
+
+  const dateLogged = typeof body.date_logged === "string" ? body.date_logged : "";
+  if (!ISO_DATE.test(dateLogged)) {
+    return badRequest("date_logged", "Date must be in YYYY-MM-DD format.");
+  }
+
+  if (typeof body.is_recurring !== "boolean") {
+    return badRequest("is_recurring", "is_recurring is required and must be a boolean.");
+  }
+
+  const notes = typeof body.notes === "string" ? body.notes.slice(0, 500) : "";
+
+  const pb = await pbAdmin();
+  let site;
+  try {
+    site = await pb.collection("sites").getOne(id);
+  } catch {
+    return NextResponse.json({ error: "site_not_found" }, { status: 404 });
+  }
+
+  try {
+    const created = await pb.collection("fixed_costs").create({
+      site: id,
+      project_code: site.project_code,
+      description,
+      cost: costNum,
+      date_logged: dateLogged,
+      notes,
+      is_recurring: body.is_recurring,
+    });
+    return NextResponse.json({ fixed_cost: created }, { status: 201 });
+  } catch (err) {
+    console.error("[POST /api/sites/[id]/fixed-costs] PB write failed", err);
+    return NextResponse.json({ error: "write_failed" }, { status: 500 });
+  }
+}
\ No newline at end of file