/**
 * The official 2026 LLBWS bracket (Williamsport, Aug 19–30), transcribed from the PDF.
 *
 * The printed bracket numbers its games 1–38. Both the routing tests and the layout
 * tests check themselves against these numbers, so the transcription lives here rather
 * than in either one.
 */

// ── PDF game number ↔ (round, match number) ──────────────────────────────────
//
// Transcribed directly from the 2026 LLBWS bracket. U.S. games take the low match
// numbers in each round, International the high ones.
export const GAME_TO_MATCH: Record<number, { round: string; matchNumber: number }> = {
  // Opening Round — U.S. G2,4,6,8 (M1–4); Intl G1,3,5,7 (M5–8)
  2: { round: "Opening Round", matchNumber: 1 },
  4: { round: "Opening Round", matchNumber: 2 },
  6: { round: "Opening Round", matchNumber: 3 },
  8: { round: "Opening Round", matchNumber: 4 },
  1: { round: "Opening Round", matchNumber: 5 },
  3: { round: "Opening Round", matchNumber: 6 },
  5: { round: "Opening Round", matchNumber: 7 },
  7: { round: "Opening Round", matchNumber: 8 },
  // Winners Round 2 — U.S. G10,12; Intl G9,11
  10: { round: "Winners Round 2", matchNumber: 1 },
  12: { round: "Winners Round 2", matchNumber: 2 },
  9: { round: "Winners Round 2", matchNumber: 3 },
  11: { round: "Winners Round 2", matchNumber: 4 },
  // Elimination Round 1 — U.S. G14,16; Intl G13,15
  14: { round: "Elimination Round 1", matchNumber: 1 },
  16: { round: "Elimination Round 1", matchNumber: 2 },
  13: { round: "Elimination Round 1", matchNumber: 3 },
  15: { round: "Elimination Round 1", matchNumber: 4 },
  // Winners Semifinals — U.S. G17,19; Intl G18,20
  17: { round: "Winners Semifinals", matchNumber: 1 },
  19: { round: "Winners Semifinals", matchNumber: 2 },
  18: { round: "Winners Semifinals", matchNumber: 3 },
  20: { round: "Winners Semifinals", matchNumber: 4 },
  // Elimination Round 2 — U.S. G22,24; Intl G21,23
  22: { round: "Elimination Round 2", matchNumber: 1 },
  24: { round: "Elimination Round 2", matchNumber: 2 },
  21: { round: "Elimination Round 2", matchNumber: 3 },
  23: { round: "Elimination Round 2", matchNumber: 4 },
  // Elimination Round 3 — U.S. G26,28; Intl G25,27
  26: { round: "Elimination Round 3", matchNumber: 1 },
  28: { round: "Elimination Round 3", matchNumber: 2 },
  25: { round: "Elimination Round 3", matchNumber: 3 },
  27: { round: "Elimination Round 3", matchNumber: 4 },
  // Winners Final — U.S. G30; Intl G29
  30: { round: "Winners Final", matchNumber: 1 },
  29: { round: "Winners Final", matchNumber: 2 },
  // Elimination Round 4 — U.S. G32; Intl G31
  32: { round: "Elimination Round 4", matchNumber: 1 },
  31: { round: "Elimination Round 4", matchNumber: 2 },
  // Elimination Final — U.S. G34; Intl G33
  34: { round: "Elimination Final", matchNumber: 1 },
  33: { round: "Elimination Final", matchNumber: 2 },
  // Bracket Championship — U.S. G36; Intl G35
  36: { round: "Bracket Championship", matchNumber: 1 },
  35: { round: "Bracket Championship", matchNumber: 2 },
  // Finals
  37: { round: "Consolation Third Place", matchNumber: 1 },
  38: { round: "World Championship", matchNumber: 1 },
};

export const MATCH_TO_GAME = new Map<string, number>(
  Object.entries(GAME_TO_MATCH).map(([game, m]) => [
    `${m.round}#${m.matchNumber}`,
    Number(game),
  ])
);

export function gameNumberFor(round: string, matchNumber: number): number {
  const game = MATCH_TO_GAME.get(`${round}#${matchNumber}`);
  if (game === undefined) throw new Error(`No PDF game for ${round} #${matchNumber}`);
  return game;
}

/** Narrows a destination that the test expects to exist. */
export function required<T>(destination: T | null): T {
  if (destination === null) throw new Error("Expected a destination, got null");
  return destination;
}

/** PDF game number a destination points at. */
export function destinationGame(
  destination: { round: string; matchNumber: number } | null
): number {
  const d = required(destination);
  return gameNumberFor(d.round, d.matchNumber);
}

/**
 * The official bracket printed as feed labels: for each game, which prior game's
 * winner (W) or loser (L) fills each slot. `null` = a team seeded in directly.
 *
 * Transcribed from the PDF. This is the source of truth the routing must reproduce.
 */
export const EXPECTED_SLOTS: Record<number, [string | null, string | null]> = {
  // Opening Round — all directly seeded
  1: [null, null], 2: [null, null], 3: [null, null], 4: [null, null],
  5: [null, null], 6: [null, null], 7: [null, null], 8: [null, null],
  // Winners Round 2 — bye team, then an Opening Round winner
  9: [null, "W1"], 10: [null, "W2"], 11: [null, "W3"], 12: [null, "W4"],
  // Elimination Round 1
  13: ["L3", "L5"], 14: ["L4", "L6"], 15: ["L1", "L7"], 16: ["L2", "L8"],
  // Winners Semifinals
  17: ["W6", "W10"], 18: ["W5", "W9"], 19: ["W12", "W8"], 20: ["W11", "W7"],
  // Elimination Round 2
  21: ["L9", "W13"], 22: ["L10", "W14"], 23: ["L11", "W15"], 24: ["L12", "W16"],
  // Elimination Round 3 — cross-over
  25: ["L18", "W23"], 26: ["L17", "W24"], 27: ["L20", "W21"], 28: ["L19", "W22"],
  // Winners Final
  29: ["W18", "W20"], 30: ["W17", "W19"],
  // Elimination Round 4
  31: ["W27", "W25"], 32: ["W28", "W26"],
  // Elimination Final
  33: ["L29", "W31"], 34: ["L30", "W32"],
  // Bracket Championship
  35: ["W29", "W33"], 36: ["W30", "W34"],
  // Finals
  37: ["L36", "L35"], 38: ["W36", "W35"],
};