'use strict';

/**
 * Player-name normalization (Session 46, completed Session 47) — the ONE source
 * of truth for comparing/de-duplicating player names. PropLine sends the same
 * player many ways: "A.J. Ewing"/"AJ Ewing", "Jazz Chisholm"/"Jazz Chisholm Jr.",
 * "Iván Herrera"/"Ivan Herrera", "Matt Liberatore"/"Matthew Liberatore",
 * "Jose Fermin (STL)". This collapses them all.
 *
 *   normalizeName("A.J. Ewing")        → { display: "AJ Ewing",       key: "aj ewing" }
 *   normalizeName("Jose Fermin (STL)") → { display: "Jose Fermin",    key: "jose fermin" }
 *   normalizeName("Ronald Acuña Jr.")  → { display: "Ronald Acuña Jr", key: "ronald acuna" }
 *   nameKey("Matt Liberatore")  === nameKey("Matthew Liberatore") === "matthew liberatore"
 *   nameKey("Iván Herrera")     === nameKey("Ivan Herrera")       === "ivan herrera"
 *
 * `display` keeps proper casing + accents (periods, suffix dots, and parenthetical
 * team tags stripped). `key` is accent-folded, lowercased, suffix-stripped, and
 * first-name-nickname-resolved for comparison.
 *
 * NOTE: an identical copy lives at web/src/lib/playerName.js for the frontend
 * (the Next bundle can't import from src/). A test cross-checks they agree.
 */

const SUFFIXES = new Set(['jr', 'sr', 'ii', 'iii', 'iv', 'v']);

// Common first-name nicknames in sports. KEY = short form, VALUE = canonical
// long form. Both sides reduce to the long form so "Matt"/"Matthew" merge.
const NICKNAMES = {
  matt: 'matthew', mike: 'michael', chris: 'christopher', jake: 'jacob',
  josh: 'joshua', nick: 'nicholas', nate: 'nathaniel', dan: 'daniel',
  danny: 'daniel', dave: 'david', rob: 'robert', bob: 'robert', joe: 'joseph',
  joey: 'joseph', jon: 'jonathan', johnny: 'john', tony: 'anthony',
  alex: 'alexander', andy: 'andrew', drew: 'andrew', ben: 'benjamin',
  will: 'william', bill: 'william', billy: 'william', willy: 'william',
  zach: 'zachary', zack: 'zachary', tom: 'thomas', tommy: 'thomas',
  ty: 'tyler', ed: 'edward', eddie: 'edward', teddy: 'theodore',
  charlie: 'charles', chuck: 'charles', rick: 'richard', dick: 'richard',
  jim: 'james', jimmy: 'james', ray: 'raymond', fred: 'frederick',
  kenny: 'kenneth', sam: 'samuel', pat: 'patrick', greg: 'gregory',
  steve: 'steven', tim: 'timothy', frank: 'francis', mickey: 'michael',
  richie: 'richard',
};

// Collapse adjacent single-letter words: "J C Escarra" → "JC Escarra",
// "J C E Escarra" → "JCE Escarra" (PropLine sends space-separated initials).
function collapseInitials(s) {
  return s.replace(/\b([A-Za-z])(?: ([A-Za-z]))+\b(?=\s|$)/g, (m) => m.replace(/ /g, ''));
}

function normalizeName(raw) {
  const display = collapseInitials(String(raw == null ? '' : raw)
    .replace(/\s*\([^)]*\)\s*/g, ' ') // strip parenthetical team tags "(STL)"
    .replace(/\./g, '')               // strip dots: "A.J." → "AJ", "Jr." → "Jr"
    .replace(/-/g, ' ')               // "Jung-hoo" → "Jung hoo" (matches "Jung Hoo")
    .replace(/\s+/g, ' ')
    .trim());
  const folded = display.normalize('NFD').replace(/[̀-ͯ]/g, '').toLowerCase();
  const key = folded.split(' ').filter((t) => t && !SUFFIXES.has(t)).join(' ');
  return { display, key };
}

/**
 * Comparison key: normalized + first-name nickname resolved to the canonical
 * form ("matt" → "matthew") so nicknames collapse.
 */
function nameKey(raw) {
  const { key } = normalizeName(raw);
  let parts = key.split(/\s+/).filter(Boolean);
  if (parts.length >= 2 && NICKNAMES[parts[0]]) parts[0] = NICKNAMES[parts[0]];
  // Strip single-letter MIDDLE tokens ("josh h smith" → "josh smith"); keep the
  // first (may be a collapsed initial like "jc") and last token.
  if (parts.length >= 3) {
    parts = parts.filter((p, i, arr) => i === 0 || i === arr.length - 1 || p.length > 1);
  }
  return parts.join(' ');
}

module.exports = { normalizeName, nameKey, SUFFIXES, NICKNAMES };
