Add Stockfish evaluation API endpoint

src/app/api/v1/stockfish/route.ts

@@ -0,0 +1,33 @@
+import { NextRequest, NextResponse } from "next/server";
+import { evaluateStockfish } from "@/lib/server/stockfishEngine";
+import { StockfishEvaluation } from "@/lib/stockfish";
+
+export const runtime = "nodejs";
+
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json();
+    const { fen, depth = 15, multiPV = 1 } = body ?? {};
+
+    if (!fen || typeof fen !== "string") {
+      return NextResponse.json({ error: "Missing or invalid FEN" }, { status: 400 });
+    }
+
+    const parsedDepth = Number(depth);
+    const parsedMultiPV = Number(multiPV);
+
+    if (!Number.isFinite(parsedDepth) || parsedDepth <= 0) {
+      return NextResponse.json({ error: "Depth must be a positive number" }, { status: 400 });
+    }
+
+    if (!Number.isFinite(parsedMultiPV) || parsedMultiPV <= 0) {
+      return NextResponse.json({ error: "multiPV must be a positive number" }, { status: 400 });
+    }
+
+    const evaluation: StockfishEvaluation = await evaluateStockfish(fen, parsedDepth, parsedMultiPV);
+    return NextResponse.json({ evaluation });
+  } catch (error) {
+    console.error("Stockfish API error", error);
+    return NextResponse.json({ error: "Failed to evaluate position" }, { status: 500 });
+  }
+}