/**
 * Einmal-Skript: Lädt alle Team-Crests von football-data.org herunter
 * und speichert sie unter public/crests/{teamId}.svg.
 *
 * Ausführung: npx tsx --env-file=.env scripts/fetch-crests.ts
 */
import * as fs from "node:fs";
import * as path from "node:path";

const CREST_BASE = "https://crests.football-data.org";
const OUT_DIR = path.resolve(import.meta.dirname, "..", "public", "crests");
const FD_BASE = "https://api.football-data.org/v4";
const FD_COMP = "WC";

function fdHeaders(): Record<string, string> {
  const token = process.env.FOOTBALL_DATA_TOKEN;
  if (!token) {
    console.error("[fehler] FOOTBALL_DATA_TOKEN nicht gesetzt. Bitte .env prüfen.");
    process.exit(1);
  }
  return { "X-Auth-Token": token };
}

interface FdTeam {
  id: number;
  name: string;
  tla?: string | null;
  crest?: string | null;
}

async function main() {
  console.log("[fetch-crests] Rufe Team-Daten von football-data.org ab…");

  const res = await fetch(`${FD_BASE}/competitions/${FD_COMP}/teams`, {
    headers: fdHeaders(),
  });
  if (!res.ok) {
    console.error(`[fehler] football-data API: ${res.status} ${res.statusText}`);
    process.exit(1);
  }

  const data = (await res.json()) as { teams: FdTeam[] };
  const teams = data.teams ?? [];
  console.log(`[fetch-crests] ${teams.length} Teams gefunden.`);

  fs.mkdirSync(OUT_DIR, { recursive: true });

  let ok = 0;
  let failed = 0;
  const failures: string[] = [];

  for (const t of teams) {
    const id = String(t.id);
    const url = t.crest ?? `${CREST_BASE}/${id}.svg`;
    const outPath = path.join(OUT_DIR, `${id}.svg`);

    try {
      const imgRes = await fetch(url);
      if (!imgRes.ok) {
        failed++;
        failures.push(`${t.name} (id=${id}): HTTP ${imgRes.status}`);
        continue;
      }
      const buf = Buffer.from(await imgRes.arrayBuffer());
      fs.writeFileSync(outPath, buf);
      ok++;
    } catch (err) {
      failed++;
      failures.push(`${t.name} (id=${id}): ${err instanceof Error ? err.message : String(err)}`);
    }
  }

  console.log(`\n[fetch-crests] Fertig: ${ok} geladen, ${failed} fehlgeschlagen.`);
  if (failures.length > 0) {
    console.log("[fetch-crests] Fehlgeschlagene:");
    for (const f of failures) console.log(`  - ${f}`);
  }
}

main().catch((err) => {
  console.error("[fehler]", err);
  process.exit(1);
});