import { NextRequest, NextResponse } from "next/server";
import { getTrends, type TrendGranularity } from "@/lib/queries";

const GRANULARITIES: TrendGranularity[] = ["hour", "day", "week", "month"];

export async function GET(req: NextRequest) {
  const sp = req.nextUrl.searchParams;
  const requestedGranularity = sp.get("granularity");
  const granularity = GRANULARITIES.includes(requestedGranularity as TrendGranularity)
    ? requestedGranularity as TrendGranularity
    : "day";
  const startTs = sp.get("start") ? Number(sp.get("start")) : undefined;
  const endTs = sp.get("end") ? Number(sp.get("end")) : undefined;
  const channelId = sp.get("channel_id") ? Number(sp.get("channel_id")) : undefined;

  const data = await getTrends(granularity, startTs, endTs, {
    username: sp.get("username") || undefined,
    model: sp.get("model") || undefined,
    channelId: Number.isFinite(channelId) ? channelId : undefined,
  });
  return NextResponse.json(data);
}