// src/scripts/index.js
// Modularized logic from original index.astro

// --- State ---
let games = [];
let currentGameId = null;
let playerNameHistory = [];

// --- DOM Selectors ---
const screens = {
  'new-game-screen': document.getElementById('new-game-screen'),
  'game-list-screen': document.getElementById('game-list-screen'),
  'game-detail-screen': document.getElementById('game-detail-screen'),
  'game-history-screen': document.getElementById('game-history-screen')
};

// --- Screen Management ---
function showScreen(screenId) {
  const currentScreen = document.querySelector('.screen.active');
  const newScreen = document.getElementById(screenId);
  if (currentScreen) {
    currentScreen.classList.remove('active');
    currentScreen.classList.add('slide-out');
    setTimeout(() => {
      currentScreen.classList.remove('slide-out');
      newScreen.classList.add('active');
      newScreen.classList.add('slide-in');
      setTimeout(() => {
        newScreen.classList.remove('slide-in');
      }, 300);
    }, 300);
  } else {
    newScreen.classList.add('active');
  }
  if (screenId === 'new-game-screen') {
    updateNameHistory();
  }
}

// --- Loading Overlay ---
function showLoading() {
  document.querySelector('.loading-overlay').style.display = 'block';
  document.querySelector('.loading-indicator').style.display = 'block';
}
function hideLoading() {
  document.querySelector('.loading-overlay').style.display = 'none';
  document.querySelector('.loading-indicator').style.display = 'none';
}

// --- Game Data Management ---
function loadGames() {
  const savedGames = localStorage.getItem('bscscore_games');
  if (savedGames) {
    games = JSON.parse(savedGames);
    renderGames();
  }
}
function saveGames() {
  localStorage.setItem('bscscore_games', JSON.stringify(games));
}

// --- Player Name History ---
function updateNameHistory() {
  const allNames = games.flatMap(game => [game.player1, game.player2, game.player3].filter(Boolean));
  const nameLastUsed = {};
  games.forEach(game => {
    if (game.player1) nameLastUsed[game.player1] = Math.max(nameLastUsed[game.player1] || 0, new Date(game.updatedAt).getTime());
    if (game.player2) nameLastUsed[game.player2] = Math.max(nameLastUsed[game.player2] || 0, new Date(game.updatedAt).getTime());
    if (game.player3) nameLastUsed[game.player3] = Math.max(nameLastUsed[game.player3] || 0, new Date(game.updatedAt).getTime());
  });
  playerNameHistory = [...new Set(Object.keys(nameLastUsed))].sort((a, b) => nameLastUsed[b] - nameLastUsed[a]);
  updateNameSelects();
}
function updateNameSelects() {
  const player1Select = document.getElementById('player1-select');
  const player2Select = document.getElementById('player2-select');
  const player3Select = document.getElementById('player3-select');
  while (player1Select.options.length > 1) player1Select.remove(1);
  while (player2Select.options.length > 1) player2Select.remove(1);
  while (player3Select.options.length > 1) player3Select.remove(1);
  playerNameHistory.forEach(name => {
    const option1 = new Option(name, name);
    const option2 = new Option(name, name);
    const option3 = new Option(name, name);
    player1Select.add(option1);
    player2Select.add(option2);
    player3Select.add(option3);
  });
}
function updatePlayerInput(playerId) {
  const select = document.getElementById(`${playerId}-select`);
  const input = document.getElementById(playerId);
  if (select.value) {
    input.value = select.value;
  }
}

// --- Validation Modal ---
function showValidationModal(message) {
  const modal = document.getElementById('validation-modal');
  const modalMessage = document.getElementById('validation-modal-message');
  modalMessage.textContent = message;
  modal.classList.add('show');
}
function closeValidationModal() {
  const modal = document.getElementById('validation-modal');
  modal.classList.remove('show');
}

// --- New Game Creation ---
function createNewGame() {
  const player1Name = document.getElementById('player1').value.trim();
  const player2Name = document.getElementById('player2').value.trim();
  const player3Name = document.getElementById('player3').value.trim();
  const gameType = document.getElementById('game-type').value;
  const raceTo = document.getElementById('race-to').value;
  if (!player1Name || !player2Name) {
    showValidationModal('Bitte Namen für beide Spieler eingeben');
    return;
  }
  const newGame = {
    id: Date.now(),
    player1: player1Name,
    player2: player2Name,
    player3: player3Name || null,
    score1: 0,
    score2: 0,
    score3: 0,
    gameType: gameType,
    raceTo: raceTo ? parseInt(raceTo) : null,
    status: 'active',
    createdAt: new Date().toISOString(),
    updatedAt: new Date().toISOString()
  };
  games.push(newGame);
  saveGames();
  updateNameHistory();
  renderGames();
  showGameDetail(newGame.id);
}

// --- Score Update ---
function updateScore(gameId, player, change) {
  const game = games.find(g => g.id === gameId);
  if (!game || game.status === 'completed') return;
  if (player === 1) {
    game.score1 = Math.max(0, game.score1 + change);
  } else if (player === 2) {
    game.score2 = Math.max(0, game.score2 + change);
  } else if (player === 3) {
    game.score3 = Math.max(0, game.score3 + change);
  }
  game.updatedAt = new Date().toISOString();
  if (game.raceTo && (game.score1 >= game.raceTo || game.score2 >= game.raceTo || (game.player3 && game.score3 >= game.raceTo))) {
    showGameCompletionModal();
  }
  saveGames();
  renderGames();
  if (document.getElementById('game-detail-screen').classList.contains('active')) {
    document.getElementById('score1').textContent = game.score1;
    document.getElementById('score2').textContent = game.score2;
    document.getElementById('score3').textContent = game.score3;
  }
}

// --- Game Deletion ---
function deleteGame(gameId) {
  const game = games.find(g => g.id === gameId);
  if (!game) return;
  currentGameId = gameId;
  const modal = document.getElementById('modal');
  const modalTitle = document.getElementById('modal-title');
  const modalMessage = document.getElementById('modal-message');
  modalTitle.textContent = 'Spiel löschen';
  modalMessage.textContent = `Möchten Sie das Spiel zwischen ${game.player1} und ${game.player2} wirklich löschen?`;
  modal.classList.add('show');
}
function closeModal() {
  const modal = document.getElementById('modal');
  modal.classList.remove('show');
  currentGameId = null;
}
function confirmDeleteGame(gameId) {
  if (!gameId) return;
  showLoading();
  setTimeout(() => {
    const gameIndex = games.findIndex(g => g.id === gameId);
    if (gameIndex !== -1) {
      games.splice(gameIndex, 1);
      saveGames();
      renderGames();
      if (currentGameId === gameId) {
        showScreen('game-list-screen');
      }
    }
    hideLoading();
    closeModal();
  }, 500);
}

// --- Game Rendering ---
function renderGames(filter = 'all') {
  const gamesContainer = document.getElementById('games-container');
  const filteredGames = games
    .filter(game => {
      if (filter === 'active') return game.status === 'active';
      if (filter === 'completed') return game.status === 'completed';
      return true;
    })
    .sort((a, b) => new Date(b.createdAt) - new Date(a.createdAt));
  if (filteredGames.length === 0) {
    gamesContainer.innerHTML = '<div class="empty-state">Keine Spiele vorhanden</div>';
    return;
  }
  gamesContainer.innerHTML = filteredGames.map(game => {
    const playerNames = game.player3 
      ? `${game.player1} vs ${game.player2} vs ${game.player3}`
      : `${game.player1} vs ${game.player2}`;
    const scores = game.player3
      ? `${game.score1} - ${game.score2} - ${game.score3}`
      : `${game.score1} - ${game.score2}`;
    return `
      <div class="game-item ${game.status === 'completed' ? 'completed' : 'active'}">
        <div class="game-info" onclick="showGameDetail(${game.id})">
          <div class="game-type">${game.gameType}${game.raceTo ? ` | ${game.raceTo}` : ''}</div>
          <div class="player-names">${playerNames}</div>
          <div class="game-scores">${scores}</div>
        </div>
        <button class="delete-button" onclick="deleteGame(${game.id})"></button>
      </div>
    `;
  }).join('');
}

// --- Game Detail ---
function showGameDetail(gameId) {
  const game = games.find(g => g.id === gameId);
  if (!game) return;
  currentGameId = gameId;
  document.getElementById('game-title').textContent = `${game.gameType}${game.raceTo ? ` | Race to ${game.raceTo}` : ''}`;
  document.getElementById('player1-name').textContent = game.player1;
  document.getElementById('player2-name').textContent = game.player2;
  const player3Score = document.getElementById('player3-score');
  if (game.player3) {
    document.getElementById('player3-name').textContent = game.player3;
    document.getElementById('score3').textContent = game.score3;
    player3Score.style.display = 'flex';
  } else {
    player3Score.style.display = 'none';
  }
  document.getElementById('score1').textContent = game.score1;
  document.getElementById('score2').textContent = game.score2;
  const player1Container = document.querySelector('.player-score:first-child');
  const player2Container = document.querySelector('.player-score:nth-child(2)');
  const player3Container = document.getElementById('player3-score');
  player1Container.classList.toggle('franky', game.player1 === 'Fränky');
  player2Container.classList.toggle('franky', game.player2 === 'Fränky');
  player3Container.classList.toggle('franky', game.player3 === 'Fränky');
  const controlButton = document.getElementById('game-control');
  if (game.status === 'completed') {
    controlButton.textContent = 'Zurück zur Liste';
    controlButton.onclick = () => showScreen('game-list-screen');
    controlButton.classList.add('disabled');
  } else {
    controlButton.textContent = 'Spiel beenden';
    controlButton.onclick = () => finishGame();
    controlButton.classList.remove('disabled');
  }
  const scoreButtons = document.querySelectorAll('.score-button');
  scoreButtons.forEach(button => {
    button.disabled = game.status === 'completed';
  });
  showScreen('game-detail-screen');
}

// --- Game Completion Modal ---
function showGameCompletionModal() {
  const game = games.find(g => g.id === currentGameId);
  if (!game) return;
  const modal = document.getElementById('game-completion-modal');
  const finalScores = modal.querySelector('.final-scores');
  const winnerAnnouncement = modal.querySelector('.winner-announcement');
  let scoreHtml = '';
  scoreHtml += `
    <div class="final-score">
      <span class="player-name">${game.player1}</span>
      <span class="score">${game.score1}</span>
    </div>
  `;
  scoreHtml += `
    <div class="final-score">
      <span class="player-name">${game.player2}</span>
      <span class="score">${game.score2}</span>
    </div>
  `;
  if (game.player3) {
    scoreHtml += `
      <div class="final-score">
        <span class="player-name">${game.player3}</span>
        <span class="score">${game.score3}</span>
      </div>
    `;
  }
  finalScores.innerHTML = scoreHtml;
  const scores = [game.score1, game.score2];
  if (game.player3) scores.push(game.score3);
  const maxScore = Math.max(...scores);
  const winners = [];
  if (game.score1 === maxScore) winners.push(game.player1);
  if (game.score2 === maxScore) winners.push(game.player2);
  if (game.player3 && game.score3 === maxScore) winners.push(game.player3);
  const winnerText = winners.length > 1 
    ? `Unentschieden zwischen ${winners.join(' und ')}` 
    : `${winners[0]} hat gewonnen!`;
  winnerAnnouncement.innerHTML = `<h3>${winnerText}</h3>`;
  modal.classList.add('show');
}
function closeGameCompletionModal() {
  document.getElementById('game-completion-modal').classList.remove('show');
}
function confirmGameCompletion() {
  const game = games.find(g => g.id === currentGameId);
  if (!game) return;
  game.status = 'completed';
  game.updatedAt = new Date().toISOString();
  saveGames();
  renderGames();
  showGameDetail(currentGameId);
  closeGameCompletionModal();
}

// --- Game Finish ---
function finishGame() {
  const game = games.find(g => g.id === currentGameId);
  if (!game) return;
  showGameCompletionModal();
}

// --- Filter Games ---
function filterGames(filter) {
  document.querySelectorAll('.filter-button').forEach(button => {
    button.classList.remove('active');
  });
  document.querySelector(`.filter-button[onclick=\"filterGames('${filter}')\"]`).classList.add('active');
  renderGames(filter);
}

// --- Fullscreen ---
function toggleFullscreen() {
  if (!document.fullscreenElement) {
    document.documentElement.requestFullscreen().catch(err => {
      console.log(`Error attempting to enable fullscreen: ${err.message}`);
    });
  } else {
    document.exitFullscreen();
  }
}
document.addEventListener('fullscreenchange', () => {
  const button = document.getElementById('fullscreen-toggle');
  if (document.fullscreenElement) {
    button.innerHTML = `<svg viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M5 16h3v3h2v-5H5v2zm3-8H5v2h5V5H8v3zm6 11h-3v2h5v-5h-2v3zM14 5v2h3v3h2V5h-5z"/></svg>`;
  } else {
    button.innerHTML = `<svg viewBox="0 0 24 24" width="24" height="24"><path fill="currentColor" d="M7 14H5v5h5v-2H7v-3zm-2-4h2V7h3V5H5v5zm12 7h-3v2h5v-5h-2v3zM14 5v2h3v3h2V5h-5z"/></svg>`;
  }
});

// --- Event Listeners ---
document.addEventListener('DOMContentLoaded', () => {
  loadGames();
  // Attach event listeners for navigation, game creation, modals, etc.
  document.querySelectorAll('.nav-button').forEach(btn => {
    if (btn.textContent.includes('Neues Spiel')) btn.onclick = () => showScreen('new-game-screen');
    if (btn.textContent.includes('Abbrechen')) btn.onclick = () => showScreen('game-list-screen');
    if (btn.textContent.includes('Zurück zur Liste')) btn.onclick = () => showScreen('game-list-screen');
  });
  document.querySelectorAll('.filter-button').forEach((btn, idx) => {
    if (btn.textContent === 'Alle') btn.onclick = () => filterGames('all');
    if (btn.textContent === 'Aktiv') btn.onclick = () => filterGames('active');
    if (btn.textContent === 'Abgeschlossen') btn.onclick = () => filterGames('completed');
  });
  // Attach fullscreen toggle event
  const fullscreenBtn = document.getElementById('fullscreen-toggle');
  if (fullscreenBtn) fullscreenBtn.addEventListener('click', toggleFullscreen);
  // Modal buttons
  const modal = document.getElementById('modal');
  if (modal) {
    modal.querySelector('.close-button').onclick = closeModal;
    modal.querySelector('.modal-button.cancel').onclick = closeModal;
    modal.querySelector('.modal-button.confirm').onclick = () => confirmDeleteGame(currentGameId);
  }
  const validationModal = document.getElementById('validation-modal');
  if (validationModal) {
    validationModal.querySelector('.close-button').onclick = closeValidationModal;
    validationModal.querySelector('.modal-button.cancel').onclick = closeValidationModal;
  }
  const gameCompletionModal = document.getElementById('game-completion-modal');
  if (gameCompletionModal) {
    gameCompletionModal.querySelector('.btn.btn--warning').onclick = confirmGameCompletion;
    gameCompletionModal.querySelector('.btn:not(.btn--warning)').onclick = closeGameCompletionModal;
  }
  // New game creation
  const startGameBtn = document.querySelector('.nav-button');
  if (startGameBtn && startGameBtn.textContent.includes('Spiel starten')) {
    startGameBtn.onclick = createNewGame;
  }
  // Player name selects
  ['player1', 'player2', 'player3'].forEach(pid => {
    const select = document.getElementById(`${pid}-select`);
    if (select) select.onchange = () => updatePlayerInput(pid);
  });
  // Score buttons
  document.querySelectorAll('.score-button').forEach((btn, idx) => {
    btn.onclick = () => {
      const player = Math.floor(idx / 2) + 1;
      const change = idx % 2 === 0 ? -1 : 1;
      updateScore(currentGameId, player, change);
    };
  });
});
// Initial screen
showScreen('game-list-screen');

window.toggleFullscreen = toggleFullscreen;