import { deletePipeline, getPipeline, updatePipeline } from "@/lib/db";

export const runtime = "nodejs";
export const dynamic = "force-dynamic";

type Ctx = { params: Promise<{ id: string }> };

function normalizeStreams(raw: unknown): string {
  if (typeof raw === "string") return raw;
  return JSON.stringify(raw ?? []);
}

export async function GET(_request: Request, { params }: Ctx) {
  try {
    const { id } = await params;
    const pipeline = getPipeline(Number(id));
    if (!pipeline) {
      return Response.json({ error: "pipeline not found" }, { status: 404 });
    }
    return Response.json(pipeline);
  } catch (err) {
    return Response.json({ error: (err as Error).message }, { status: 500 });
  }
}

export async function PUT(request: Request, { params }: Ctx) {
  try {
    const { id } = await params;
    const body = await request.json();
    const patch: Record<string, unknown> = {};
    for (const key of [
      "name",
      "source_conn_id",
      "target_conn_id",
      "schema_sync",
      "schema_scope",
      "include_fk",
      "mode",
    ]) {
      if (body[key] !== undefined) patch[key] = body[key];
    }
    if (body.streams !== undefined) {
      patch.streams = normalizeStreams(body.streams);
    }
    const pipeline = updatePipeline(Number(id), patch);
    if (!pipeline) {
      return Response.json({ error: "pipeline not found" }, { status: 404 });
    }
    return Response.json(pipeline);
  } catch (err) {
    return Response.json({ error: (err as Error).message }, { status: 500 });
  }
}

export async function DELETE(_request: Request, { params }: Ctx) {
  try {
    const { id } = await params;
    if (!deletePipeline(Number(id))) {
      return Response.json({ error: "pipeline not found" }, { status: 404 });
    }
    return Response.json({ ok: true });
  } catch (err) {
    return Response.json({ error: (err as Error).message }, { status: 500 });
  }
}