import { NextResponse } from "next/server";
import { requireSessionUser } from "@/lib/server/session";
import { createGroup, listGroups } from "@/lib/server/groups";
import { toErrorResponse } from "@/lib/server/errors";
import { getRequestMeta } from "@/lib/server/request";

export async function GET() {
    const { requestId } = await getRequestMeta();
    try {
        const user = await requireSessionUser();
        const groups = await listGroups(user.id);
        return NextResponse.json({ requestId, groups });
    } catch (e) {
        const { status, body } = toErrorResponse(e, "GET /api/groups", requestId);
        return NextResponse.json(body, { status });
    }
}

export async function POST(req: Request) {
    const { requestId } = await getRequestMeta();
    try {
        const user = await requireSessionUser();
        const body = await req.json().catch(() => null);
        const name = String(body?.name || "").trim();
        if (!name) return NextResponse.json({ requestId, error: { code: "MISSING_NAME", message: "Name is required" } }, { status: 400 });

        const group = await createGroup(user.id, name);
        return NextResponse.json({ requestId, group });
    } catch (e) {
        const { status, body } = toErrorResponse(e, "POST /api/groups", requestId);
        return NextResponse.json(body, { status });
    }
}