// Ad-hoc sanity check, not a real test runner.
//   pnpm exec tsx src/data/__check.ts

import { loadBudget } from "./load.js";

function fmtEUR(n: number): string {
  return new Intl.NumberFormat("de-DE", {
    style: "currency",
    currency: "EUR",
    maximumFractionDigits: 0,
  }).format(n);
}

const tree = await loadBudget();

console.log(`Years: ${tree.years.length} (${tree.years[0]}–${tree.years.at(-1)})`);
console.log(`Produktbereiche: ${tree.produktbereiche.length}`);
console.log(
  `Produktgruppen total: ${tree.produktbereiche.reduce(
    (n, b) => n + b.produktgruppen.length,
    0
  )}`
);
console.log(`Overlap notes (>5% disagreement): ${tree.overlaps.length}`);

// Bucket overlaps by year to confirm they're concentrated in the expected
// triple-counted years (2025/26/27 appear in two plans each).
const byYear: Record<number, number> = {};
for (const o of tree.overlaps) byYear[o.year] = (byYear[o.year] ?? 0) + 1;
console.log("Overlaps by year:", byYear);

// Sample 3 overlaps to confirm they're plausible plan revisions, not bugs.
console.log("\nSample overlaps:");
for (const o of tree.overlaps.slice(0, 3)) {
  console.log(
    `  ${o.produktbereich} > ${o.produktgruppe} · ${o.year} · ${o.category}`
  );
  for (const v of o.values) {
    console.log(`    ${v.source.padEnd(50)} ${fmtEUR(v.value)}`);
  }
  console.log(`    Δ = ${(o.divergencePct * 100).toFixed(1)}%`);
}

for (const year of [2022, 2025, 2026, 2028]) {
  const t = tree.totals[year];
  if (!t) continue;
  console.log(
    `\n${year}: Aufw ${fmtEUR(t.aufwendungen.total)}  ·  Ertr ${fmtEUR(
      t.ertraege.total
    )}  ·  Saldo ${fmtEUR(t.ertraege.total - t.aufwendungen.total)}`
  );
}

console.log("\nTop 5 Produktbereiche by Aufwand 2026:");
const ranked = [...tree.produktbereiche]
  .map((b) => ({ name: b.name, aufwand: b.totals[2026]?.aufwendungen.total ?? 0 }))
  .sort((a, b) => b.aufwand - a.aufwand)
  .slice(0, 5);
for (const r of ranked) {
  console.log(`  ${r.name.padEnd(42)} ${fmtEUR(r.aufwand)}`);
}