// POST /api/projects/[projectId]/apply — body is { ops: ModelOp[], expectedVersion?: number, reason?: string }.
// Returns { applied, model, version, idMapping, errors } from the server-side applyOps.

import { NextResponse } from "next/server";
import { applyOpsToProject } from "../../../../../lib/db/repo";
import type { ModelOp } from "../../../../../lib/sync/ops";

export async function POST(req: Request, { params }: { params: Promise<{ projectId: string }> }) {
  const { projectId } = await params;
  let body: { ops?: ModelOp[]; expectedVersion?: number; reason?: string };
  try {
    body = await req.json();
  } catch {
    return NextResponse.json({ error: "invalid json body" }, { status: 400 });
  }
  if (!body.ops || !Array.isArray(body.ops) || body.ops.length === 0) {
    return NextResponse.json({ error: "body.ops must be a non-empty array" }, { status: 400 });
  }
  try {
    const result = await applyOpsToProject(projectId, body.ops, body.expectedVersion, body.reason);
    return NextResponse.json(result);
  } catch (err) {
    return NextResponse.json({ error: (err as Error).message }, { status: 500 });
  }
}