import { EventEmitter } from 'node:events';
import { BEST_OF, computeVetoState, resolveAction, VetoError } from './veto.js';
import { formatCode, hashToken, normalizeCode, randomCode, randomId, randomToken, safeEqual } from './security.js';
import { applyLogLines, initialLiveState, seriesScore, splitLogBody } from './liveScore.js';
import { trimLiveState } from './rounds.js';
import { sanitizeConsoleText } from './servers/cs2Config.js';
import { NOTIFY_EVENTS } from './discord.js';

export class HttpError extends Error {
  constructor(status, message, code = 'error') {
    super(message);
    this.status = status;
    this.code = code;
  }
}

export const MATCH_STATUS = {
  lobby: 'Lobby offen',
  veto: 'Map-Veto läuft',
  server_setup: 'Server wird eingerichtet',
  live: 'Match läuft',
  finished: 'Abgeschlossen',
  cancelled: 'Abgebrochen',
};
export const OPEN_STATUSES = ['lobby', 'veto'];
export const RUNNING_STATUSES = ['server_setup', 'live'];
export const CLOSED_STATUSES = ['finished', 'cancelled'];


function cleanName(value, field, max = 32) {
  const name = String(value ?? '').replace(/\s+/g, ' ').trim();
  if (name.length < 2) throw new HttpError(400, `${field} muss mindestens 2 Zeichen haben`, 'invalid_input');
  if (name.length > max) throw new HttpError(400, `${field} darf höchstens ${max} Zeichen haben`, 'invalid_input');
  return name;
}

function cleanSteamId(value) {
  const raw = String(value ?? '').trim();
  if (!raw) return null;
  if (!/^\d{17}$/.test(raw)) throw new HttpError(400, 'Steam-ID muss eine 17-stellige SteamID64 sein', 'invalid_input');
  return raw;
}

export class MatchService extends EventEmitter {
  constructor({ db, pools, config, notifier = { enabled: false, send: async () => {} } }) {
    super();
    this.db = db;
    this.pools = pools;
    this.config = config;
    this.notifier = notifier;
    this.presence = () => new Set();
  }

  now() {
    return Date.now();
  }

  // ---------- Lesen ----------

  getMatch(id) {
    const match = this.db.prepare('SELECT * FROM matches WHERE id = ?').get(id);
    if (!match) throw new HttpError(404, 'Match nicht gefunden', 'not_found');
    return match;
  }

  players(matchId) {
    return this.db
      .prepare('SELECT * FROM players WHERE match_id = ? AND active = 1 ORDER BY joined_at')
      .all(matchId);
  }

  vetoActions(matchId) {
    return this.db.prepare('SELECT * FROM veto_actions WHERE match_id = ? ORDER BY idx').all(matchId);
  }

  seriesMaps(matchId) {
    return this.db.prepare('SELECT * FROM series_maps WHERE match_id = ? ORDER BY number').all(matchId);
  }

  serverRow(matchId) {
    return this.db.prepare('SELECT * FROM servers WHERE match_id = ?').get(matchId) ?? null;
  }

  poolFor(match) {
    const pool = this.pools[match.mode];
    return { ...pool, maps: JSON.parse(match.maps) };
  }

  vetoState(match) {
    return computeVetoState({
      maps: JSON.parse(match.maps),
      flow: JSON.parse(match.flow),
      firstTeam: match.first_team ?? 'A',
      actions: this.vetoActions(match.id),
    });
  }

  /**
   * Ermittelt, wer der Aufrufer in einem Match ist. Ein Browser darf bis zu zwei Zugänge mitschicken
   * (z. B. Organisator-Token und Spieler-Token), damit der Organisator selbst mitspielen kann.
   * Unbekannte Tokens werden ignoriert; ohne gültigen Zugang ergibt sich "public".
   */
  resolveViewer(matchId, tokens) {
    const match = this.getMatch(matchId);
    const viewer = {
      matchId, role: 'public', isOrganizer: false, isSpectator: false, isCaptain: false, playerId: null, team: null,
    };
    const list = (Array.isArray(tokens) ? tokens : [tokens]).filter((t) => typeof t === 'string' && t).slice(0, 2);
    for (const token of list) {
      if (safeEqual(hashToken(token), match.organizer_token_hash)) {
        viewer.isOrganizer = true;
        continue;
      }
      const player = this.db
        .prepare('SELECT * FROM players WHERE match_id = ? AND token_hash = ? AND active = 1')
        .get(matchId, hashToken(token));
      if (player) {
        // Höchstens ein Spieler pro Aufrufer – ein zweiter Spieler-Token wird ignoriert.
        if (!viewer.playerId) Object.assign(viewer, { playerId: player.id, team: player.team, isCaptain: !!player.is_captain });
        continue;
      }
      if (safeEqual(normalizeCode(token), match.code_spectator)) viewer.isSpectator = true;
    }
    viewer.role = viewer.isOrganizer ? 'organizer'
      : viewer.isCaptain ? 'captain'
        : viewer.playerId ? 'player'
          : viewer.isSpectator ? 'spectator' : 'public';
    return viewer;
  }

  require(viewer, need) {
    const ok = {
      organizer: viewer.isOrganizer,
      captain: viewer.isCaptain,
      player: !!viewer.playerId,
      spectator: viewer.role !== 'public',
    }[need];
    if (!ok) {
      const labels = { organizer: 'den Organisator', captain: 'Team-Captains', player: 'Spieler', spectator: 'Teilnehmer' };
      throw new HttpError(403, `Diese Aktion ist nur für ${labels[need]} erlaubt`, 'forbidden');
    }
  }

  // ---------- Match anlegen ----------

  createMatch({ teamA, teamB, mode, format, vetoStart = 'coin' }) {
    const pool = this.pools[mode];
    if (!pool) throw new HttpError(400, 'Unbekannter Spielmodus', 'invalid_input');
    const formatInfo = pool.formats[format];
    if (!formatInfo?.supported) {
      throw new HttpError(400, `${String(format).toUpperCase()} wird für ${pool.label} nicht unterstützt`, 'unsupported_format');
    }
    if (!['coin', 'A', 'B'].includes(vetoStart)) throw new HttpError(400, 'Ungültige Veto-Startregel', 'invalid_input');
    const nameA = cleanName(teamA, 'Name von Team A');
    const nameB = cleanName(teamB, 'Name von Team B');
    if (nameA.toLowerCase() === nameB.toLowerCase()) {
      throw new HttpError(400, 'Die Teams brauchen unterschiedliche Namen', 'invalid_input');
    }

    const id = randomId();
    const organizerToken = randomToken();
    const now = this.now();
    const codes = this.uniqueCodes(3);
    this.db
      .prepare(
        `INSERT INTO matches (id, team_a_name, team_b_name, mode, format, flow, maps, veto_start, first_team, status,
          organizer_token_hash, code_a, code_b, code_spectator, created_at, updated_at, last_activity_at)
         VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, 'lobby', ?, ?, ?, ?, ?, ?, ?)`,
      )
      .run(
        id, nameA, nameB, mode, format,
        JSON.stringify(formatInfo.flow), JSON.stringify(pool.maps),
        vetoStart, vetoStart === 'coin' ? null : vetoStart,
        hashToken(organizerToken), codes[0], codes[1], codes[2], now, now, now,
      );
    this.log(id, 'created', `Match ${nameA} vs. ${nameB} erstellt (${pool.label}, ${format.toUpperCase()})`);
    this.emit('created', id);
    this.changed(id);
    return { id, organizerToken };
  }

  uniqueCodes(count) {
    const exists = this.db.prepare(
      'SELECT 1 FROM matches WHERE code_a = ? OR code_b = ? OR code_spectator = ?',
    );
    const codes = new Set();
    while (codes.size < count) {
      const code = randomCode(8);
      if (!exists.get(code, code, code)) codes.add(code);
    }
    return [...codes];
  }

  /** Findet Match und Zugangsart zu einem Einladungs- oder Zuschauercode. */
  lookupCode(rawCode) {
    const code = normalizeCode(rawCode);
    if (code.length !== 8) throw new HttpError(404, 'Code ungültig', 'invalid_code');
    const match = this.db
      .prepare('SELECT * FROM matches WHERE code_a = ? OR code_b = ? OR code_spectator = ?')
      .get(code, code, code);
    if (!match) throw new HttpError(404, 'Code ungültig', 'invalid_code');
    const access = match.code_spectator === code ? 'spectator' : 'team';
    const team = access === 'team' ? (match.code_a === code ? 'A' : 'B') : null;
    return { matchId: match.id, access, team, match };
  }

  // ---------- Lobby ----------

  join(matchId, { code, nickname, steamId }) {
    const found = this.lookupCode(code);
    if (found.matchId !== matchId || found.access !== 'team') {
      throw new HttpError(403, 'Dieser Code gehört nicht zu einem Team dieses Matches', 'invalid_code');
    }
    const name = cleanName(nickname, 'Spielername', 24);
    const steam = cleanSteamId(steamId);
    const token = randomToken();
    const playerId = randomId();

    this.db.transaction(() => {
      const match = this.getMatch(matchId);
      if (CLOSED_STATUSES.includes(match.status)) throw new HttpError(409, 'Das Match ist bereits beendet', 'match_closed');
      const teamPlayers = this.players(matchId).filter((p) => p.team === found.team);
      const pool = this.pools[match.mode];
      if (teamPlayers.length >= pool.teamSize) {
        throw new HttpError(409, `Das Team ist voll (${pool.teamSize}/${pool.teamSize})`, 'team_full');
      }
      const all = this.players(matchId);
      if (all.some((p) => p.nickname.toLowerCase() === name.toLowerCase())) {
        throw new HttpError(409, 'Dieser Spielername ist in diesem Match bereits vergeben', 'name_taken');
      }
      if (steam && all.some((p) => p.steam_id === steam)) {
        throw new HttpError(409, 'Diese Steam-ID ist in diesem Match bereits eingetragen', 'steam_taken');
      }
      const isCaptain = teamPlayers.length === 0 ? 1 : 0;
      this.db
        .prepare(
          `INSERT INTO players (id, match_id, team, nickname, steam_id, token_hash, is_captain, ready, active, joined_at)
           VALUES (?, ?, ?, ?, ?, ?, ?, 0, 1, ?)`,
        )
        .run(playerId, matchId, found.team, name, steam, hashToken(token), isCaptain, this.now());
      this.log(matchId, 'join', `${name} ist ${this.teamName(match, found.team)} beigetreten${isCaptain ? ' (Captain)' : ''}`);
    })();
    this.changed(matchId);
    return { playerToken: token, playerId, team: found.team };
  }

  setReady(viewer, ready) {
    this.require(viewer, 'player');
    const match = this.getMatch(viewer.matchId);
    if (match.status !== 'lobby') throw new HttpError(409, 'Bereitschaft kann nur in der Lobby geändert werden', 'wrong_phase');
    this.db.prepare('UPDATE players SET ready = ? WHERE id = ?').run(ready ? 1 : 0, viewer.playerId);
    this.changed(viewer.matchId);
  }

  leave(viewer) {
    this.require(viewer, 'player');
    this.removePlayer(viewer.matchId, viewer.playerId, 'hat das Match verlassen');
  }

  kick(viewer, playerId) {
    this.require(viewer, 'organizer');
    this.removePlayer(viewer.matchId, playerId, 'wurde vom Organisator entfernt');
  }

  removePlayer(matchId, playerId, reason) {
    this.db.transaction(() => {
      const match = this.getMatch(matchId);
      if (match.status !== 'lobby') {
        throw new HttpError(409, 'Spieler können nur in der Lobby entfernt werden', 'wrong_phase');
      }
      const player = this.db.prepare('SELECT * FROM players WHERE id = ? AND match_id = ? AND active = 1').get(playerId, matchId);
      if (!player) throw new HttpError(404, 'Spieler nicht gefunden', 'not_found');
      this.db.prepare('UPDATE players SET active = 0, is_captain = 0, ready = 0 WHERE id = ?').run(playerId);
      if (player.is_captain) {
        const next = this.players(matchId).find((p) => p.team === player.team);
        if (next) this.db.prepare('UPDATE players SET is_captain = 1 WHERE id = ?').run(next.id);
      }
      this.log(matchId, 'leave', `${player.nickname} ${reason}`);
    })();
    this.changed(matchId);
  }

  setCaptain(viewer, playerId) {
    this.db.transaction(() => {
      const target = this.db
        .prepare('SELECT * FROM players WHERE id = ? AND match_id = ? AND active = 1')
        .get(playerId, viewer.matchId);
      if (!target) throw new HttpError(404, 'Spieler nicht gefunden', 'not_found');
      const allowed = viewer.isOrganizer || (viewer.isCaptain && viewer.team === target.team);
      if (!allowed) throw new HttpError(403, 'Nur der Organisator oder der Captain des Teams kann den Captain ändern', 'forbidden');
      this.db.prepare('UPDATE players SET is_captain = 0 WHERE match_id = ? AND team = ?').run(viewer.matchId, target.team);
      this.db.prepare('UPDATE players SET is_captain = 1 WHERE id = ?').run(target.id);
      this.log(viewer.matchId, 'captain', `${target.nickname} ist jetzt Captain`);
    })();
    this.changed(viewer.matchId);
  }

  regenerateCode(viewer, target) {
    this.require(viewer, 'organizer');
    const column = { A: 'code_a', B: 'code_b', spectator: 'code_spectator' }[target];
    if (!column) throw new HttpError(400, 'Unbekannter Code', 'invalid_input');
    const [code] = this.uniqueCodes(1);
    this.db.prepare(`UPDATE matches SET ${column} = ?, updated_at = ? WHERE id = ?`).run(code, this.now(), viewer.matchId);
    this.log(viewer.matchId, 'code', `Neuer ${target === 'spectator' ? 'Zuschauer' : `Team-${target}`}-Code erzeugt`);
    this.changed(viewer.matchId);
  }

  teamReadiness(match) {
    const teamSize = this.pools[match.mode].teamSize;
    const players = this.players(match.id);
    const result = {};
    for (const team of ['A', 'B']) {
      const list = players.filter((p) => p.team === team);
      const enough = this.config.requireFullTeams ? list.length === teamSize : list.length >= 1;
      result[team] = {
        count: list.length,
        teamSize,
        hasCaptain: list.some((p) => p.is_captain),
        allReady: list.length > 0 && list.every((p) => p.ready),
        enough,
      };
      result[team].ready = result[team].enough && result[team].allReady && result[team].hasCaptain;
    }
    return result;
  }

  // ---------- Veto ----------

  startVeto(viewer) {
    this.require(viewer, 'organizer');
    this.db.transaction(() => {
      const match = this.getMatch(viewer.matchId);
      if (match.status !== 'lobby') throw new HttpError(409, 'Das Veto wurde bereits gestartet', 'wrong_phase');
      const readiness = this.teamReadiness(match);
      if (!readiness.A.ready || !readiness.B.ready) {
        throw new HttpError(409, 'Beide Teams müssen vollständig und bereit sein', 'teams_not_ready');
      }
      const firstTeam = match.first_team ?? (Math.random() < 0.5 ? 'A' : 'B');
      this.db
        .prepare("UPDATE matches SET status = 'veto', first_team = ?, veto_started_at = ?, updated_at = ? WHERE id = ?")
        .run(firstTeam, this.now(), this.now(), match.id);
      const how = match.veto_start === 'coin' ? 'per Münzwurf ausgelost' : 'vom Organisator festgelegt';
      this.log(match.id, 'veto', `Veto gestartet – ${this.teamName(match, firstTeam)} beginnt (${how})`);
      this.notify('veto_start', match.id, {
        title: '🎮 Veto gestartet',
        description: `**${this.matchTitle(match.id)}**`,
        color: 0x3b82f6,
        fields: [{ name: 'Beginnt', value: this.teamName(match, firstTeam), inline: true }],
      });
    })();
    this.changed(viewer.matchId);
  }

  /** Ablaufzeitpunkt des aktuellen Veto-Schritts (ms), null wenn keine Frist gilt. */
  vetoDeadline(match) {
    if (!this.config.vetoStepSeconds || match.status !== 'veto') return null;
    const actions = this.vetoActions(match.id);
    const since = actions.length ? actions[actions.length - 1].created_at : match.veto_started_at;
    return since == null ? null : since + this.config.vetoStepSeconds * 1000;
  }

  vetoRemainingMs(match) {
    const deadline = this.vetoDeadline(match);
    return deadline === null ? null : Math.max(0, deadline - this.now());
  }

  /** Führt den aktuellen Veto-Schritt für das Team am Zug aus: zufällige Map bzw. zufällige Seite. */
  autoVetoStep(match) {
    const state = this.vetoState(match);
    if (state.done || !state.current) return;
    const { type, team, index } = state.current;
    const pick = (list) => list[Math.floor(Math.random() * list.length)];
    const viewer = {
      matchId: match.id, role: 'captain', isOrganizer: false, isCaptain: true, isSpectator: false, playerId: null, team,
    };
    const action = type === 'side'
      ? { stepIndex: index, side: pick(['CT', 'T']) }
      : { stepIndex: index, map: pick(state.maps.filter((m) => m.status === 'available')).id };
    this.log(match.id, 'veto', `Zeit abgelaufen – ${this.teamName(match, team)} wird automatisch vertreten`);
    this.vetoAction(viewer, action);
  }

  /** Läuft die Frist eines Veto-Schritts ab, führt das Backend den Schritt aus. */
  autoVetoTimeouts() {
    for (const match of this.db.prepare("SELECT * FROM matches WHERE status = 'veto'").all()) {
      const deadline = this.vetoDeadline(match);
      if (deadline === null || this.now() < deadline) continue;
      try {
        this.autoVetoStep(match);
      } catch (err) {
        this.log(match.id, 'veto', `Automatischer Schritt fehlgeschlagen: ${err.message}`);
      }
    }
  }

  startVetoTimer() {
    if (!this.config.vetoStepSeconds || this.vetoTimer) return;
    this.vetoTimer = setInterval(() => this.autoVetoTimeouts(), 1000);
  }

  stopVetoTimer() {
    clearInterval(this.vetoTimer);
    this.vetoTimer = null;
  }

  vetoAction(viewer, { stepIndex, map, side }) {
    this.require(viewer, 'captain');
    let finished = false;
    this.db.transaction(() => {
      const match = this.getMatch(viewer.matchId);
      if (match.status !== 'veto') throw new HttpError(409, 'Es läuft gerade kein Veto', 'wrong_phase');
      const actions = this.vetoActions(match.id);
      const context = {
        maps: JSON.parse(match.maps),
        flow: JSON.parse(match.flow),
        firstTeam: match.first_team,
        actions,
      };
      let newActions;
      try {
        newActions = resolveAction(context, { team: viewer.team, stepIndex: Number(stepIndex), map, side });
      } catch (err) {
        if (err instanceof VetoError) throw new HttpError(409, err.message, err.code);
        throw err;
      }
      const insert = this.db.prepare(
        'INSERT INTO veto_actions (match_id, idx, type, team, map, side, player_id, created_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?)',
      );
      const maps = Object.fromEntries(context.maps.map((m) => [m.id, m.name]));
      newActions.forEach((a, i) => {
        insert.run(match.id, actions.length + i, a.type, a.team, a.map ?? null, a.side ?? null,
          a.type === 'decider' ? null : viewer.playerId, this.now());
        this.log(match.id, 'veto', this.describeAction(match, a, maps));
      });

      const state = computeVetoState({ ...context, actions: [...actions, ...newActions] });
      if (state.done) {
        finished = true;
        const insertMap = this.db.prepare(
          'INSERT INTO series_maps (match_id, number, map, picked_by, side_chosen_by, ct_team, status) VALUES (?, ?, ?, ?, ?, ?, ?)',
        );
        for (const entry of state.series) {
          const ctTeam = entry.startSides ? (entry.startSides.A === 'CT' ? 'A' : 'B') : null;
          insertMap.run(match.id, entry.number, entry.map, entry.pickedBy, entry.sideChosenBy, ctTeam,
            entry.number === 1 ? 'next' : 'pending');
        }
        this.db
          .prepare("UPDATE matches SET status = 'server_setup', veto_finished_at = ?, current_map_number = 1, updated_at = ? WHERE id = ?")
          .run(this.now(), this.now(), match.id);
        this.log(match.id, 'veto', `Veto abgeschlossen – Reihenfolge: ${state.series.map((s) => maps[s.map]).join(', ')}`);
      }
    })();
    this.changed(viewer.matchId);
    if (finished) this.emit('vetoFinished', viewer.matchId);
  }

  describeAction(match, action, mapNames) {
    const team = action.team ? this.teamName(match, action.team) : null;
    switch (action.type) {
      case 'ban': return `${team} bannt ${mapNames[action.map]}`;
      case 'pick': return `${team} wählt ${mapNames[action.map]}`;
      case 'side': return `${team} startet auf ${mapNames[action.map]} als ${action.side}`;
      case 'decider': return `${mapNames[action.map]} bleibt übrig und ist die Entscheidungsmap`;
      default: return action.type;
    }
  }

  // ---------- Serie / Abschluss ----------

  setStatus(matchId, status) {
    const extra = CLOSED_STATUSES.includes(status) ? ', finished_at = @now' : '';
    this.db
      .prepare(`UPDATE matches SET status = @status, updated_at = @now${extra} WHERE id = @id`)
      .run({ status, now: this.now(), id: matchId });
    this.changed(matchId);
  }

  advanceSeries(viewer) {
    this.require(viewer, 'organizer');
    return this.advanceSeriesFor(viewer.matchId);
  }

  /** Nächste Map der Serie vormerken (Organisator oder automatisch nach Map-Ende). */
  advanceSeriesFor(matchId) {
    let nextNumber;
    this.db.transaction(() => {
      const match = this.getMatch(matchId);
      if (match.status !== 'live') throw new HttpError(409, 'Die nächste Map kann erst geladen werden, wenn das Match läuft', 'wrong_phase');
      const maps = this.seriesMaps(match.id);
      nextNumber = match.current_map_number + 1;
      if (!maps.find((m) => m.number === nextNumber)) throw new HttpError(409, 'Es gibt keine weitere Map in dieser Serie', 'series_done');
      this.db.prepare("UPDATE series_maps SET status = 'done' WHERE match_id = ? AND number = ?").run(match.id, match.current_map_number);
      this.db.prepare("UPDATE series_maps SET status = 'next' WHERE match_id = ? AND number = ?").run(match.id, nextNumber);
      this.db
        .prepare("UPDATE matches SET current_map_number = ?, status = 'server_setup', updated_at = ? WHERE id = ?")
        .run(nextNumber, this.now(), match.id);
      this.log(match.id, 'series', `Map ${nextNumber} der Serie wird geladen`);
    })();
    this.changed(matchId);
    return nextNumber;
  }

  // ---------- Live-Ergebnisse ----------

  /** Startet die Zählung einer Map neu (beim Laden der Map auf dem Server). */
  resetLiveScore(matchId, number) {
    this.db
      .prepare('UPDATE series_maps SET score_a = 0, score_b = 0, winner = NULL, live = NULL, live_updated_at = NULL WHERE match_id = ? AND number = ?')
      .run(matchId, number);
  }

  /** Stand auf den Zeitpunkt nach einer Runde zurückstellen (nach Rollback). */
  rewindLiveScore(matchId, roundNumber, file) {
    const match = this.getMatch(matchId);
    const row = this.seriesMaps(matchId).find((m) => m.number === match.current_map_number);
    if (!row) return;
    const live = row.live ? trimLiveState(JSON.parse(row.live), roundNumber) : null;
    const score = live ? live.score : { A: 0, B: 0 };
    this.db
      .prepare("UPDATE series_maps SET score_a = ?, score_b = ?, winner = NULL, status = 'live', live = ?, live_updated_at = ? WHERE match_id = ? AND number = ?")
      .run(score.A, score.B, live ? JSON.stringify(live) : null, this.now(), matchId, row.number);
    this.log(matchId, 'rollback', `Map ${row.number} zurückgespielt auf Runde ${roundNumber} (${file})`);
    this.changed(matchId);
  }

  /** Organisator hat die Aufwärmphase beendet: ab dem nächsten Match_Start wird gezählt. */
  markWarmupEnded(matchId, ended = true) {
    const match = this.getMatch(matchId);
    const row = this.seriesMaps(matchId).find((m) => m.number === match.current_map_number);
    if (!row) return;
    const state = row.live ? JSON.parse(row.live) : initialLiveState({ map: row.map, ctTeam: row.ct_team });
    state.warmupEnded = ended;
    this.db
      .prepare('UPDATE series_maps SET live = ? WHERE match_id = ? AND number = ?')
      .run(JSON.stringify(state), matchId, row.number);
  }

  /** Logzeilen vom CS2-Server (logaddress_add_http). Der Schlüssel in der URL identifiziert den Server. */
  ingestLogs(matchId, key, body) {
    const server = this.serverRow(matchId);
    if (!server || !safeEqual(String(key ?? ''), server.config_key)) {
      throw new HttpError(403, 'Unbekannter Log-Schlüssel', 'forbidden');
    }
    this.applyLiveLog(matchId, splitLogBody(body));
  }

  applyLiveLog(matchId, lines) {
    if (!lines.length) return;
    let ended = null;
    this.db.transaction(() => {
      const match = this.getMatch(matchId);
      if (CLOSED_STATUSES.includes(match.status)) return;
      const row = this.seriesMaps(matchId).find((m) => m.number === match.current_map_number);
      if (!row) return;
      const before = row.live ? JSON.parse(row.live) : initialLiveState({ map: row.map, ctTeam: row.ct_team });
      const { state, events } = applyLogLines(before, lines, {
        teamNames: { A: sanitizeConsoleText(match.team_a_name), B: sanitizeConsoleText(match.team_b_name) },
        maxRounds: match.mode === 'wingman' ? this.config.match.maxRoundsWingman : this.config.match.maxRoundsCompetitive,
        overtimeRounds: 6,
      });
      if (!events.length && JSON.stringify(before) === JSON.stringify(state)) {
        // Nichts Relevantes dabei, aber der Server liefert: Empfang trotzdem vermerken (Anzeige "Live-Daten empfangen")
        this.db.prepare('UPDATE series_maps SET live_updated_at = ? WHERE match_id = ? AND number = ?').run(this.now(), matchId, row.number);
        return;
      }
      const finished = events.find((e) => e.type === 'map_end');
      this.db
        .prepare(
          `UPDATE series_maps SET score_a = ?, score_b = ?, winner = ?, live = ?, live_updated_at = ?
             ${finished ? ", status = 'done'" : ''} WHERE match_id = ? AND number = ?`,
        )
        .run(state.score.A, state.score.B, state.winner, JSON.stringify(state), this.now(), matchId, row.number);
      if (events.some((e) => e.type === 'match_start')) this.log(matchId, 'score', `Map ${row.number} (${this.mapName(match, row.map)}) live – Zählung beginnt`);
      if (finished) {
        ended = { row, state, match };
        const winner = state.winner ? this.teamName(match, state.winner) : 'Unentschieden';
        this.log(matchId, 'score',
          `Map ${row.number} (${this.mapName(match, row.map)}) beendet: ${match.team_a_name} ${state.score.A}:${state.score.B} ${match.team_b_name} – Sieger: ${winner}`);
        this.notify('map_end', matchId, {
          title: '🗺️ Map beendet',
          description: `**${this.matchTitle(matchId)}**`,
          color: 0xf59e0b,
          fields: [
            { name: `Map ${row.number}`, value: this.mapName(match, row.map), inline: true },
            { name: 'Stand', value: `${state.score.A} : ${state.score.B}`, inline: true },
            { name: 'Sieger', value: winner, inline: true },
          ],
        });
      }
    })();
    if (ended) {
      const maps = this.seriesMaps(matchId);
      const score = seriesScore(maps);
      const needed = Math.floor(BEST_OF[ended.match.format] / 2) + 1;
      const decided = score.A >= needed ? 'A' : score.B >= needed ? 'B' : null;
      if (decided) this.log(matchId, 'score', `Serie entschieden: ${this.teamName(ended.match, decided)} gewinnt ${score[decided]}:${score[decided === 'A' ? 'B' : 'A']}`);
      if (decided) {
        const loser = decided === 'A' ? 'B' : 'A';
        this.notify('series_end', matchId, {
          title: '🏆 Serie entschieden',
          description: `**${this.matchTitle(matchId)}**`,
          color: 0x22c55e,
          fields: [
            { name: 'Sieger', value: this.teamName(ended.match, decided), inline: true },
            { name: 'Serienstand', value: `${score[decided]} : ${score[loser]}`, inline: true },
          ],
        });
      }
      const hasNext = maps.some((m) => m.number === ended.row.number + 1);
      this.changed(matchId);
      this.emit('mapEnded', { matchId, number: ended.row.number, decided, hasNext });
      return;
    }
    this.changed(matchId);
  }

  mapName(match, mapId) {
    return JSON.parse(match.maps).find((m) => m.id === mapId)?.name ?? mapId;
  }

  markCurrentMapLive(matchId) {
    const match = this.getMatch(matchId);
    this.db
      .prepare("UPDATE series_maps SET status = 'live' WHERE match_id = ? AND number = ?")
      .run(matchId, match.current_map_number);
  }

  close(viewer, status) {
    this.require(viewer, 'organizer');
    this.closeMatch(viewer.matchId, status);
  }

  closeMatch(matchId, status, message) {
    const match = this.getMatch(matchId);
    if (CLOSED_STATUSES.includes(match.status)) throw new HttpError(409, 'Das Match ist bereits beendet', 'match_closed');
    if (status === 'finished') {
      this.db.prepare("UPDATE series_maps SET status = 'done' WHERE match_id = ? AND status IN ('live','next')").run(match.id);
    }
    this.log(match.id, 'status', message ?? (status === 'finished' ? 'Match abgeschlossen' : 'Match abgebrochen'));
    const finished = status === 'finished';
    this.notify('match_closed', match.id, {
      title: finished ? '✅ Match abgeschlossen' : '⛔ Match abgebrochen',
      description: `**${this.matchTitle(match.id)}**${message ? `\n${message}` : ''}`,
      color: finished ? 0x6b7280 : 0x9ca3af,
    });
    this.setStatus(match.id, status);
    this.emit('closed', match.id);
  }

  // ---------- Hilfen ----------

  teamName(match, team) {
    return team === 'A' ? match.team_a_name : match.team_b_name;
  }

  touch(matchId) {
    this.db.prepare('UPDATE matches SET last_activity_at = ? WHERE id = ?').run(this.now(), matchId);
  }

  /** Titel für Meldungen, z. B. „Team A vs. Team B (BO3)“. */
  matchTitle(matchId) {
    const m = this.getMatch(matchId);
    return `${m.team_a_name} vs. ${m.team_b_name} (${m.format.toUpperCase()})`;
  }

  /**
   * Meldung an den Discord-Webhook, falls konfiguriert. Ohne Stream-Schlüssel gehört die Übersicht
   * des Matches dazu, mit Schlüssel entfällt der Link, damit der Schlüssel nicht in den Kanal gelangt.
   */
  /** Discord-Meldungen: der Webhook muss eingerichtet und das Ereignis ausgewählt sein. */
  notificationSettings() {
    const row = this.db.prepare("SELECT value FROM settings WHERE key = 'discord_events'").get();
    let stored = {};
    try {
      stored = row ? JSON.parse(row.value) : {};
    } catch {
      stored = {};
    }
    const events = Object.fromEntries(NOTIFY_EVENTS.map(({ key }) => [key, stored[key] !== false]));
    return { enabled: this.notifier.enabled, events, catalog: NOTIFY_EVENTS };
  }

  setNotificationEvents(input) {
    if (!input || typeof input !== 'object') throw new HttpError(400, 'Ungültige Auswahl der Meldungen', 'invalid');
    const events = Object.fromEntries(NOTIFY_EVENTS.map(({ key }) => [key, input[key] === true]));
    this.db
      .prepare("INSERT INTO settings (key, value) VALUES ('discord_events', ?) ON CONFLICT(key) DO UPDATE SET value = excluded.value")
      .run(JSON.stringify(events));
    return this.notificationSettings();
  }

  /** Meldung als Discord-Embed. Ohne Stream-Schlüssel ist der Titel ein Link auf die Match-Übersicht. */
  notify(type, matchId, embed) {
    if (!this.notifier.enabled || !this.notificationSettings().events[type]) return;
    const url = this.config.streamKey ? undefined : `${this.config.publicUrl}/stream/match/${matchId}`;
    this.notifier.send({
      embeds: [{ ...embed, url, timestamp: new Date(this.now()).toISOString(), footer: { text: 'CS2 Mapveto' } }],
    });
  }

  log(matchId, type, message) {
    this.db
      .prepare('INSERT INTO events (match_id, type, message, created_at) VALUES (?, ?, ?, ?)')
      .run(matchId, type, message, this.now());
  }

  changed(matchId) {
    this.db.prepare('UPDATE matches SET updated_at = ? WHERE id = ?').run(this.now(), matchId);
    this.emit('changed', matchId);
  }

  /**
   * Übersicht aller aktiven Matches für die Stream-Seite: laufende Vetos und Matches mit Details,
   * Lobbys und kürzlich beendete Matches knapp. Enthält nur, was Zuschauer sehen dürfen –
   * keine Codes, keine Verbindungsdaten.
   */
  streamOverview({ resultsWithinMs = 3 * 3_600_000 } = {}) {
    const rows = this.db.prepare('SELECT * FROM matches ORDER BY created_at DESC LIMIT 200').all();
    const now = this.now();
    const active = [];
    const upcoming = [];
    const results = [];

    for (const m of rows) {
      const pool = this.pools[m.mode];
      const maps = JSON.parse(m.maps);
      const mapInfo = (id) => {
        const map = maps.find((x) => x.id === id);
        return { id, name: map?.name ?? id, image: map?.image ?? null, color: map?.color ?? null };
      };
      const base = {
        id: m.id,
        teams: { A: m.team_a_name, B: m.team_b_name },
        mode: m.mode,
        modeLabel: pool?.label ?? m.mode,
        format: m.format,
        status: m.status,
        statusLabel: MATCH_STATUS[m.status],
      };

      if (m.status === 'lobby') {
        const readiness = this.teamReadiness(m);
        upcoming.push({ ...base, ready: { A: readiness.A.ready, B: readiness.B.ready } });
        continue;
      }
      const seriesRows = this.seriesMaps(m.id);
      const series = seriesRows.map((s) => {
        const live = s.live ? JSON.parse(s.live) : null;
        return {
          number: s.number,
          ...mapInfo(s.map),
          pickedBy: s.picked_by,
          status: s.status,
          score: { A: s.score_a, B: s.score_b },
          winner: s.winner,
          live: live && { status: live.status, sides: live.sides, roundsPlayed: live.rounds.length },
        };
      });
      const item = { ...base, seriesScore: seriesScore(seriesRows), currentMapNumber: m.current_map_number, series };

      if (CLOSED_STATUSES.includes(m.status)) {
        if (m.status === 'finished' && now - (m.finished_at ?? 0) < resultsWithinMs) results.push(item);
        continue;
      }
      if (m.status === 'veto') {
        const veto = this.vetoState(m);
        item.veto = {
          current: veto.current,
          maps: veto.maps.map((x) => ({ ...mapInfo(x.id), status: x.status, by: x.by })),
          stepsDone: veto.steps.filter((x) => x.done).length,
          stepsTotal: veto.steps.length,
        };
      }
      active.push(item);
    }
    // Laufende Matches zuerst, dann Vetos, dann Serverstart – jeweils älteste zuerst
    const order = { live: 0, veto: 1, server_setup: 2 };
    active.sort((a, b) => (order[a.status] - order[b.status]) || a.id.localeCompare(b.id));
    return { active, upcoming: upcoming.slice(0, 8), results: results.slice(0, 8), updatedAt: now };
  }

  listMatches() {
    const rows = this.db.prepare('SELECT * FROM matches ORDER BY created_at DESC LIMIT 200').all();
    const counts = this.db.prepare('SELECT team, COUNT(*) AS n FROM players WHERE match_id = ? AND active = 1 GROUP BY team');
    return rows.map((m) => {
      const byTeam = Object.fromEntries(counts.all(m.id).map((r) => [r.team, r.n]));
      const server = this.serverRow(m.id);
      const pool = this.pools[m.mode];
      const maps = this.seriesMaps(m.id);
      const current = maps.find((s) => s.number === m.current_map_number);
      return {
        seriesScore: maps.length ? seriesScore(maps) : null,
        currentMap: current && (current.status === 'live' || current.status === 'done')
          ? {
            number: current.number,
            name: this.mapName(m, current.map),
            image: JSON.parse(m.maps).find((x) => x.id === current.map)?.image ?? null,
            color: JSON.parse(m.maps).find((x) => x.id === current.map)?.color ?? null,
            score: { A: current.score_a, B: current.score_b },
            finished: current.status === 'done',
          }
          : null,
        id: m.id,
        teamA: m.team_a_name,
        teamB: m.team_b_name,
        mode: m.mode,
        modeLabel: pool?.label ?? m.mode,
        format: m.format,
        status: m.status,
        statusLabel: MATCH_STATUS[m.status],
        group: OPEN_STATUSES.includes(m.status) ? 'open' : RUNNING_STATUSES.includes(m.status) ? 'running' : 'closed',
        players: { A: byTeam.A ?? 0, B: byTeam.B ?? 0, teamSize: pool?.teamSize ?? 0 },
        server: server ? { status: server.status, simulated: !!server.simulated } : null,
        createdAt: m.created_at,
      };
    });
  }

  /** Rollenabhängige Sicht auf ein Match. Server-Verwaltungsdaten (RCON) sind nie enthalten. */
  snapshot(matchId, viewer) {
    const match = this.getMatch(matchId);
    const pool = this.poolFor(match);
    const mapNames = Object.fromEntries(pool.maps.map((m) => [m.id, m.name]));
    const players = this.players(matchId);
    const online = this.presence(matchId);
    const readiness = this.teamReadiness(match);
    const publicView = viewer.role === 'public';

    const team = (t) => ({
      key: t,
      name: this.teamName(match, t),
      teamSize: pool.teamSize,
      readiness: readiness[t],
      players: publicView
        ? []
        : players
            .filter((p) => p.team === t)
            .map((p) => ({
              id: p.id,
              nickname: p.nickname,
              isCaptain: !!p.is_captain,
              ready: !!p.ready,
              online: online.has(p.id),
              isYou: p.id === viewer.playerId,
              hasSteamId: !!p.steam_id,
            })),
    });

    const veto = this.vetoState(match);
    const actions = this.vetoActions(matchId);
    const seriesRows = this.seriesMaps(matchId);
    const series = seriesRows.map((s) => {
      const live = s.live ? JSON.parse(s.live) : null;
      return {
        number: s.number,
        map: s.map,
        mapName: mapNames[s.map] ?? s.map,
        pickedBy: s.picked_by,
        sideChosenBy: s.side_chosen_by,
        ctTeam: s.ct_team,
        status: s.status,
        score: { A: s.score_a, B: s.score_b },
        winner: s.winner,
        // Auch ohne Spielstand (Aufwärmphase) mitschicken, sobald der Server Logs liefert
        live: (live || s.live_updated_at) && {
          status: live?.status ?? 'warmup',
          sides: live?.sides ?? null,
          rounds: live?.rounds ?? [],
          updatedAt: s.live_updated_at,
        },
      };
    });

    const snapshot = {
      id: match.id,
      teams: { A: team('A'), B: team('B') },
      mode: match.mode,
      modeLabel: pool.label,
      format: match.format,
      bestOf: BEST_OF[match.format],
      status: match.status,
      statusLabel: MATCH_STATUS[match.status],
      createdAt: match.created_at,
      updatedAt: match.updated_at,
      vetoStart: match.veto_start,
      currentMapNumber: match.current_map_number,
      viewer: {
        role: viewer.role, playerId: viewer.playerId, team: viewer.team,
        isOrganizer: viewer.isOrganizer, isCaptain: viewer.isCaptain, isSpectator: viewer.isSpectator,
      },
      canStartVeto: match.status === 'lobby' && readiness.A.ready && readiness.B.ready,
      requireFullTeams: this.config.requireFullTeams,
      autoAdvanceSeconds: this.config.autoAdvanceSeconds,
      maps: pool.maps,
      veto: publicView && match.status === 'lobby'
        ? null
        : {
            started: match.status !== 'lobby',
            firstTeam: match.first_team,
            steps: veto.steps,
            maps: veto.maps,
            current: match.status === 'veto' ? veto.current : null,
            remainingMs: this.vetoRemainingMs(match),
            stepSeconds: this.config.vetoStepSeconds,
            done: veto.done,
            history: actions.map((a) => ({
              index: a.idx,
              type: a.type,
              team: a.team,
              map: a.map,
              side: a.side,
              at: a.created_at,
              text: this.describeAction(match, a, mapNames),
            })),
          },
      series,
      seriesScore: seriesScore(seriesRows),
      maxRounds: match.mode === 'wingman' ? this.config.match.maxRoundsWingman : this.config.match.maxRoundsCompetitive,
      server: this.serverView(match, viewer),
      events: publicView
        ? []
        : this.db
            .prepare('SELECT type, message, created_at AS at FROM events WHERE match_id = ? ORDER BY id DESC LIMIT 40')
            .all(matchId),
    };

    if (viewer.isOrganizer) {
      const base = this.config.publicUrl;
      snapshot.organizer = {
        codes: { A: formatCode(match.code_a), B: formatCode(match.code_b), spectator: formatCode(match.code_spectator) },
        links: {
          A: `${base}/join/${formatCode(match.code_a)}`,
          B: `${base}/join/${formatCode(match.code_b)}`,
          spectator: `${base}/watch/${formatCode(match.code_spectator)}`,
          // Vollbild-Übersicht für den Stream (OBS-Browserquelle), nutzt den Zuschauercode
          stream: `${base}/stream/${formatCode(match.code_spectator)}`,
          // Stream-Übersicht nur für dieses Match, ohne Zuschauercode (Schlüssel nur wenn gesetzt)
          overview: `${base}/stream/match/${match.id}${this.config.streamKey ? `?key=${encodeURIComponent(this.config.streamKey)}` : ''}`,
        },
      };
    }
    return snapshot;
  }

  serverView(match, viewer) {
    const row = this.serverRow(match.id);
    if (!row) return null;
    const view = {
      adapter: row.adapter,
      simulated: !!row.simulated,
      status: row.status,
      message: row.message,
      playerCount: row.player_count,
      paused: !!row.paused,
      attempts: row.attempts,
      updatedAt: row.updated_at,
      idleTimeoutMinutes: this.config.idleTimeoutMinutes,
    };
    if (viewer.isOrganizer) {
      // Zeitpunkt der letzten Anforderung (neuer Start oder "Server neu starten / wiederholen")
      view.requestedAt = row.started_at ?? null;
      if (row.host) view.address = { host: row.host, port: row.port, tvPort: row.tv_port };
    }
    const configured = row.status === 'configured';
    if (!configured || viewer.role === 'public') return view;

    const isTeam = viewer.isOrganizer || !!viewer.playerId;
    const isSpectatorView = viewer.isOrganizer || viewer.isSpectator;
    if (isTeam) {
      view.connect = {
        host: row.host,
        port: row.port,
        password: row.server_password,
        command: `password ${row.server_password}; connect ${row.host}:${row.port}`,
        steamUrl: `steam://connect/${row.host}:${row.port}/${row.server_password}`,
      };
    }
    if (isSpectatorView && this.config.match.tvEnabled) {
      view.gotv = {
        host: row.host,
        port: row.tv_port,
        password: row.tv_password,
        delaySeconds: this.config.match.tvDelaySeconds,
        command: `password ${row.tv_password}; connect ${row.host}:${row.tv_port}`,
      };
    }
    return view;
  }
}