/**
 * Generate app/lib/fifa-2026-third-place-allocation.ts from the published FIFA
 * 2026 World Cup Annex C third-place allocation table.
 *
 * Source: Wikipedia "Template:2026 FIFA World Cup third-place table".
 * Run with: node scripts/gen-fifa-third-place.mjs
 */
import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const SOURCE_URL =
  "https://en.wikipedia.org/w/index.php?title=Template:2026_FIFA_World_Cup_third-place_table&action=raw";

const text = await (await fetch(SOURCE_URL)).text();

// Split into row blocks at each `! scope="row" | N`.
const parts = text.split(/!\s*scope="row"\s*\|/).slice(1);
if (parts.length !== 495) throw new Error(`expected 495 rows, got ${parts.length}`);

const out = {};
for (const part of parts) {
  // Cut the block at the next row separator / table end.
  const block = part.split(/\n\|\}|\n\|-/)[0];
  const tokens = block.replace(/'''/g, "").split(/\|\||\||\n/).map((t) => t.trim());

  const qualifying = tokens.filter((t) => /^[A-L]$/.test(t));
  const assignments = tokens.filter((t) => /^3[A-L]$/.test(t)).map((t) => t[1]);

  if (qualifying.length !== 8) throw new Error(`row qualifying != 8: ${qualifying}`);
  if (assignments.length !== 8) throw new Error(`row assignments != 8: ${assignments}`);

  const set = new Set(assignments);
  if (set.size !== 8) throw new Error(`duplicate thirds: ${assignments}`);
  for (const g of assignments) {
    if (!qualifying.includes(g)) throw new Error(`third ${g} not qualifying`);
  }

  const key = [...qualifying].sort().join("");
  if (out[key]) throw new Error(`duplicate key ${key}`);
  out[key] = assignments.join(""); // thirds in winner-column order [A,B,D,E,G,I,K,L]
}

const keys = Object.keys(out).sort();
if (keys.length !== 495) throw new Error(`expected 495 keys, got ${keys.length}`);

const lines = keys.map((k) => `  ${k}: "${out[k]}",`).join("\n");
const ts = `// AUTO-GENERATED from FIFA 2026 World Cup Annex C third-place allocation.
// Source: Wikipedia "Template:2026 FIFA World Cup third-place table".
// Do not edit by hand — regenerate with scripts/gen-fifa-third-place.mjs.
//
// Key:   the eight qualifying third-place group letters, sorted (e.g. "EFGHIJKL").
// Value: the qualifying third-place group facing each group winner, in the
//        column order [1A, 1B, 1D, 1E, 1G, 1I, 1K, 1L].
export const THIRD_PLACE_WINNER_COLUMNS = ["A", "B", "D", "E", "G", "I", "K", "L"] as const;

export const ANNEX_C_THIRD_PLACE_ALLOCATION: Record<string, string> = {
${lines}
};
`;

const target = path.join(
  path.dirname(fileURLToPath(import.meta.url)),
  "..",
  "app",
  "lib",
  "fifa-2026-third-place-allocation.ts"
);
fs.writeFileSync(target, ts);
console.log(`Wrote ${keys.length} rows to ${target}`);