// Stadion-Zuordnung — die alleinige Quelle für Spielorte (Feed-venue wird ignoriert).
//
// Gruppenphase: über die Teampaarung (Ländercodes). Eindeutig, da jede Paarung
//   im Turnier genau einmal vorkommt — unabhängig von Heim/Auswärts-Reihenfolge
//   und von gleichzeitigen Anstößen.
// K.o.-Phase: über die FIFA-Spielnummer (dort sind die Anstöße eindeutig).

import { GroupId, Match, Team } from "./types";

// --- GRUPPENPHASE: "CODE1-CODE2" -> Stadion ---
export const FIXTURES_GROUP_STAGE: Record<string, string> = {
  // Gruppe A
  "MEX-RSA": "Estadio Azteca, Mexiko-Stadt",
  "KOR-CZE": "Estadio Akron, Guadalajara",
  "CZE-RSA": "Mercedes-Benz Stadium, Atlanta",
  "MEX-KOR": "Estadio Akron, Guadalajara",
  "CZE-MEX": "Estadio Azteca, Mexiko-Stadt",
  "RSA-KOR": "Estadio BBVA, Monterrey",
  // Gruppe B
  "CAN-BIH": "BMO Field, Toronto",
  "QAT-SUI": "Levi's Stadium, San Francisco Bay Area",
  "SUI-BIH": "SoFi Stadium, Los Angeles",
  "CAN-QAT": "BC Place, Vancouver",
  "SUI-CAN": "BC Place, Vancouver",
  "BIH-QAT": "Lumen Field, Seattle",
  // Gruppe C
  "BRA-MAR": "Gillette Stadium, Boston",
  "HAI-SCO": "MetLife Stadium, New York/New Jersey",
  "BRA-HAI": "Lincoln Financial Field, Philadelphia",
  "SCO-MAR": "Gillette Stadium, Boston",
  "SCO-BRA": "Hard Rock Stadium, Miami",
  "MAR-HAI": "Mercedes-Benz Stadium, Atlanta",
  // Gruppe D
  "USA-PAR": "SoFi Stadium, Los Angeles",
  "AUS-TUR": "BC Place, Vancouver",
  "TUR-PAR": "Levi's Stadium, San Francisco Bay Area",
  "USA-AUS": "Lumen Field, Seattle",
  "TUR-USA": "SoFi Stadium, Los Angeles",
  "PAR-AUS": "Levi's Stadium, San Francisco Bay Area",
  // Gruppe E
  "CIV-ECU": "Lincoln Financial Field, Philadelphia",
  "GER-CUR": "NRG Stadium, Houston",
  "GER-CIV": "BMO Field, Toronto",
  "ECU-CUR": "Arrowhead Stadium, Kansas City",
  "CUR-CIV": "Lincoln Financial Field, Philadelphia",
  "ECU-GER": "MetLife Stadium, New York/New Jersey",
  // Gruppe F
  "NED-JPN": "AT&T Stadium, Dallas",
  "SWE-TUN": "Estadio BBVA, Monterrey",
  "NED-SWE": "NRG Stadium, Houston",
  "TUN-JPN": "Estadio BBVA, Monterrey",
  "JPN-SWE": "AT&T Stadium, Dallas",
  "TUN-NED": "Arrowhead Stadium, Kansas City",
  // Gruppe G
  "IRN-NZL": "SoFi Stadium, Los Angeles",
  "BEL-EGY": "Lumen Field, Seattle",
  "BEL-IRN": "SoFi Stadium, Los Angeles",
  "NZL-EGY": "BC Place, Vancouver",
  "NZL-BEL": "Lumen Field, Seattle",
  "EGY-IRN": "BC Place, Vancouver",
  // Gruppe H
  "KSA-URU": "Hard Rock Stadium, Miami",
  "ESP-CPV": "Mercedes-Benz Stadium, Atlanta",
  "URU-CPV": "Mercedes-Benz Stadium, Atlanta",
  "ESP-KSA": "Hard Rock Stadium, Miami",
  "URU-ESP": "Estadio Akron, Guadalajara",
  "CPV-KSA": "NRG Stadium, Houston",
  // Gruppe I
  "FRA-SEN": "MetLife Stadium, New York/New Jersey",
  "IRQ-NOR": "Gillette Stadium, Boston",
  "NOR-SEN": "Lincoln Financial Field, Philadelphia",
  "FRA-IRQ": "MetLife Stadium, New York/New Jersey",
  "NOR-FRA": "Gillette Stadium, Boston",
  "SEN-IRQ": "BMO Field, Toronto",
  // Gruppe J
  "ARG-ALG": "Arrowhead Stadium, Kansas City",
  "AUT-JOR": "Levi's Stadium, San Francisco Bay Area",
  "ARG-AUT": "AT&T Stadium, Dallas",
  "JOR-ALG": "Levi's Stadium, San Francisco Bay Area",
  "JOR-ARG": "Arrowhead Stadium, Kansas City",
  "ALG-AUT": "NRG Stadium, Houston",
  // Gruppe K
  "UZB-COL": "Estadio Azteca, Mexiko-Stadt",
  "POR-COD": "NRG Stadium, Houston",
  "POR-UZB": "NRG Stadium, Houston",
  "COL-COD": "Estadio Akron, Guadalajara",
  "COL-POR": "Hard Rock Stadium, Miami",
  "COD-UZB": "Estadio BBVA, Monterrey",
  // Gruppe L
  "GHA-PAN": "BMO Field, Toronto",
  "ENG-CRO": "AT&T Stadium, Dallas",
  "ENG-GHA": "Gillette Stadium, Boston",
  "PAN-CRO": "BMO Field, Toronto",
  "PAN-ENG": "MetLife Stadium, New York/New Jersey",
  "CRO-GHA": "Arrowhead Stadium, Kansas City",
};

// Reihenfolge-unabhängiger Lookup: baut beide Schlüsselrichtungen.
const PAIR_VENUE = new Map<string, string>();
for (const [key, venue] of Object.entries(FIXTURES_GROUP_STAGE)) {
  const [a, b] = key.split("-");
  PAIR_VENUE.set(`${a}-${b}`, venue);
  PAIR_VENUE.set(`${b}-${a}`, venue);
}

// --- K.O.-PHASE: FIFA-Spielnummer -> Stadion ---
export const VENUE_BY_KO_MATCH: Record<number, string> = {
  // Sechzehntelfinale (R32)
  73: "SoFi Stadium, Los Angeles",
  74: "Gillette Stadium, Boston",
  75: "Estadio Azteca, Mexiko-Stadt",
  76: "Hard Rock Stadium, Miami",
  77: "Mercedes-Benz Stadium, Atlanta",
  78: "AT&T Stadium, Dallas",
  79: "Levi's Stadium, San Francisco Bay Area",
  80: "Lumen Field, Seattle",
  81: "MetLife Stadium, New York/New Jersey",
  82: "Lincoln Financial Field, Philadelphia",
  83: "BMO Field, Toronto",
  84: "NRG Stadium, Houston",
  85: "BC Place, Vancouver",
  86: "Estadio BBVA, Monterrey",
  87: "Arrowhead Stadium, Kansas City",
  88: "AT&T Stadium, Dallas",
  // Achtelfinale (R16)
  89: "MetLife Stadium, New York/New Jersey",
  90: "Hard Rock Stadium, Miami",
  91: "NRG Stadium, Houston",
  92: "Mercedes-Benz Stadium, Atlanta",
  93: "AT&T Stadium, Dallas",
  94: "Lumen Field, Seattle",
  95: "BC Place, Vancouver",
  96: "Estadio Azteca, Mexiko-Stadt",
  // Viertelfinale
  97: "Gillette Stadium, Boston",
  98: "SoFi Stadium, Los Angeles",
  99: "Hard Rock Stadium, Miami",
  100: "Arrowhead Stadium, Kansas City",
  // Halbfinale
  101: "AT&T Stadium, Dallas",
  102: "Mercedes-Benz Stadium, Atlanta",
  // Spiel um Platz 3
  103: "Hard Rock Stadium, Miami",
  // Finale
  104: "MetLife Stadium, New York/New Jersey",
};

// Manche Feeds nutzen abweichende 3-Buchstaben-Codes als die Map oben.
// Diese Tabelle übersetzt bekannte Feed-Codes auf den Map-Code.
// (Beispiel: FIFA/ISO nutzt CUW für Curaçao, die Map verwendet CUR.)
const CODE_ALIAS: Record<string, string> = {
  CUW: "CUR",   // Curaçao
  CRC: "CRC",   // (Platzhalter, falls weitere auftauchen)
};

// Fallback über den Teamnamen, falls ein Code unbekannt/abweichend ist.
// Schlüssel: normalisierter Name -> Map-Code.
const NAME_TO_CODE: Record<string, string> = {
  "curacao": "CUR", "curaçao": "CUR",
  "uruguay": "URU",
  "cape verde": "CPV", "cape verde islands": "CPV", "cabo verde": "CPV",
  "saudi arabia": "KSA",
  "ivory coast": "CIV", "côte d'ivoire": "CIV", "cote d'ivoire": "CIV",
  "south korea": "KOR", "korea republic": "KOR",
  "south africa": "RSA",
  "czechia": "CZE", "czech republic": "CZE",
  "bosnia and herzegovina": "BIH", "bosnia-herzegovina": "BIH",
  "dr congo": "COD", "congo dr": "COD", "democratic republic of the congo": "COD",
};

// Normalisiert den Code eines Teams auf den in der Map verwendeten Code.
function canonicalCode(team: Team | undefined): string | null {
  if (!team) return null;
  if (team.code) {
    const c = team.code.toUpperCase();
    if (CODE_ALIAS[c]) return CODE_ALIAS[c];
    // Wenn der Code direkt in der Map vorkommt, nimm ihn.
    return c;
  }
  // kein Code -> über den Namen versuchen
  const n = team.name?.toLowerCase().trim();
  return n ? (NAME_TO_CODE[n] ?? null) : null;
}

// Liefert das Stadion eines Spiels.
// Gruppenspiel -> über Teampaarung (Codes, mit Alias/Namen-Fallback),
// K.o.-Spiel -> über Spielnummer.
export function venueFor(m: Match, teams: Team[]): string | null {
  if (m.group != null) {
    const home = teams.find((t) => t.id === m.homeTeamId);
    const away = teams.find((t) => t.id === m.awayTeamId);
    let hc = canonicalCode(home);
    let ac = canonicalCode(away);
    // Erstversuch mit Codes
    let venue = hc && ac ? PAIR_VENUE.get(`${hc}-${ac}`) : undefined;
    // Falls kein Treffer: über die Namen normalisieren und erneut probieren.
    if (!venue) {
      const hn = home?.name?.toLowerCase().trim();
      const an = away?.name?.toLowerCase().trim();
      hc = (hn && NAME_TO_CODE[hn]) || hc;
      ac = (an && NAME_TO_CODE[an]) || ac;
      venue = hc && ac ? PAIR_VENUE.get(`${hc}-${ac}`) : undefined;
    }
    return venue ?? null;
  }
  return VENUE_BY_KO_MATCH[m.matchNumber] ?? null;
}