import { NextResponse } from "next/server";
import { fetchMatchesAndTeams, fetchOdds, attachOdds } from "@/lib/feeds";
import { computeGroupTables, computeThirdPlaceTable } from "@/lib/standings";
import { qualifiedThirdGroups, resolveAnnexC } from "@/lib/bracket";

// Diese Route wird vom Frontend gepollt. Sie ist der einzige Ort, der die
// Upstream-Feeds berührt — gecacht, damit Rate Limits eingehalten werden.
export const dynamic = "force-dynamic";

export async function GET() {
  try {
    const { matches: rawMatches, teams } = await fetchMatchesAndTeams();

    // Odds sind optional: fällt der Polymarket-Call aus, liefern wir trotzdem.
    let matches = rawMatches;
    try {
      const odds = await fetchOdds();
      matches = attachOdds(rawMatches, teams, odds);
    } catch {
      // still ohne Wahrscheinlichkeiten
    }

    const groupTables = computeGroupTables(teams, matches);
    const thirdTable = computeThirdPlaceTable(groupTables);
    const qGroups = qualifiedThirdGroups(thirdTable);
    const annex = qGroups.length === 8 ? resolveAnnexC(qGroups) : null;

    return NextResponse.json({
      updatedAt: new Date().toISOString(),
      teams,
      matches,
      groupTables,
      thirdTable,
      annexAssignment: annex,
      annexResolved: annex != null,
    });
  } catch (err) {
    const message = err instanceof Error ? err.message : "unbekannter Fehler";
    return NextResponse.json(
      { error: "Feed nicht erreichbar", detail: message },
      { status: 502 },
    );
  }
}