// SET MESSAGE (WIN/LOSE)
function setMessage(text, status){
  messageEl.textContent = text;
  messageEl.className = status; // 'win', 'lose', atau '' (tie)
}

// Simple Blackjack implementation
const SUITS = ['♠','♥','♦','♣'];
const RANKS = ['A','2','3','4','5','6','7','8','9','10','J','Q','K'];

// DOM
const dealerHandEl = document.getElementById('dealer-hand');
const playerHandEl = document.getElementById('player-hand');
const dealerValueEl = document.getElementById('dealer-value');
const playerValueEl = document.getElementById('player-value');
const balanceEl = document.getElementById('balance');
const betInput = document.getElementById('bet-input');
const betBtn = document.getElementById('bet-btn');
const currentBetEl = document.getElementById('current-bet');
const hitBtn = document.getElementById('hit');
const standBtn = document.getElementById('stand');
const doubleBtn = document.getElementById('double');
const newRoundBtn = document.getElementById('new-round');
const messageEl = document.getElementById('message');

let deck = [];
let dealer = [];
let player = [];
let dealerHidden = true;
let balance = 0; // Will be initialized from server
let currentBet = 0;
let inRound = false;

// Initialize balance from global gameBalance (set in html.php)
if (typeof gameBalance !== 'undefined') {
  balance = gameBalance;
} else {
  balance = 1000; // Fallback
}

function makeDeck(){
  deck = [];
  for(const s of SUITS){
    for(const r of RANKS){
      deck.push({suit:s,rank:r});
    }
  }
}

function shuffle(){
  for(let i=deck.length-1;i>0;i--){
    const j = Math.floor(Math.random()*(i+1));
    [deck[i],deck[j]] = [deck[j],deck[i]];
  }
}

function cardValue(card){
  const r = card.rank;
  if(r==='A') return [1,11];
  if(['J','Q','K'].includes(r)) return [10];
  return [parseInt(r,10)];
}

function handValues(hand){
  let totals = [0];
  for(const c of hand){
    const vals = cardValue(c);
    const newTotals = [];
    for(const t of totals){
      for(const v of vals){ newTotals.push(t+v); }
    }
    totals = Array.from(new Set(newTotals));
  }
  const valid = totals.filter(t=>t<=21);
  if(valid.length) return Math.max(...valid);
  return Math.min(...totals);
}

function renderHand(el,hand,hideFirst=false){
  el.innerHTML='';
  hand.forEach((c,i)=>{
    const div = document.createElement('div');
    div.className='card'+(c.suit==='♥'||c.suit==='♦'?' red':'');

    if(hideFirst && i===0){
      div.className='card back'; 
      div.textContent='TERSEMBUNYI';
    } else {
      const top = document.createElement('div'); 
      top.textContent = c.rank + ' ' + c.suit;
      const bot = document.createElement('div'); 
      bot.style.alignSelf='flex-end'; 
      bot.textContent = c.rank + ' ' + c.suit;
      div.appendChild(top); 
      div.appendChild(bot);
    }

    el.appendChild(div);
  });
}

function updateUI(){
  renderHand(dealerHandEl,dealer,dealerHidden);
  renderHand(playerHandEl,player,false);
  dealerValueEl.textContent = dealerHidden ? '??' : 'Nilai: '+handValues(dealer);
  playerValueEl.textContent = 'Nilai: '+handValues(player);
  balanceEl.textContent = balance.toLocaleString('id-ID');
  currentBetEl.textContent = currentBet.toLocaleString('id-ID');
}

// Function to update balance on server
function updateBalanceOnServer() {
  fetch('html.php', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded',
    },
    body: 'update_balance=' + balance
  })
  .catch(err => console.log('Balance update sent'));
}

function startRound(){
  if(inRound) return;

  const bet = Number(betInput.value) || 0;
  if(bet <=0 || bet > balance){ alert(' BANK TIDAK CUKUP! '); return; }

  currentBet = bet; 
  balance -= bet; 
  inRound=true; 
  dealerHidden=true;

  setMessage('', ''); // RESET MESSAGE

  makeDeck(); shuffle();
  dealer = [deck.pop(), deck.pop()];
  player = [deck.pop(), deck.pop()];

  updateUI();

  // NATURAL BLACKJACK
  if(handValues(player)===21){
    dealerHidden=false; 
    updateUI();
    const dealerVal = handValues(dealer);

    if(dealerVal===21){
      balance += currentBet;
      setMessage('Tie (seri).', '');
    } else {
      const payout = Math.floor(currentBet * 2.5);
      balance += payout;
      setMessage('Blackjack! You Win!', 'win');
    }

    inRound=false; 
    currentBet=0; 
    updateUI();
    updateBalanceOnServer();
  }
}

function playerHit(){
  if(!inRound) return;

  player.push(deck.pop());
  updateUI();

  if(handValues(player) > 21){
    dealerHidden=false;
    setMessage('Bust! You Lose!', 'lose');
    inRound=false;
    currentBet=0;
    updateUI();
    updateBalanceOnServer();
  }
}

function playerStand(){
  if(!inRound) return;

  dealerHidden=false;

  while(handValues(dealer)<17){
    dealer.push(deck.pop());
  }

  const pv = handValues(player);
  const dv = handValues(dealer);

  if(dv>21 || pv>dv){
    balance += currentBet*2;
    setMessage('You Win!', 'win');

  } else if(pv===dv){
    balance += currentBet;
    setMessage('Tie (seri).', '');

  } else {
    setMessage('You Lose!', 'lose');
  }

  inRound=false; 
  currentBet=0; 
  updateUI();
  updateBalanceOnServer();
}

function playerDouble(){
  if(!inRound) return;
  if(balance < currentBet){ alert('Bank tidak cukup untuk double.'); return; }

  balance -= currentBet; 
  currentBet *= 2;

  player.push(deck.pop());
  updateUI();

  if(handValues(player)>21){
    dealerHidden=false;
    setMessage('Bust! You Lose!', 'lose');
    inRound=false;
    currentBet=0;
    updateUI();
    updateBalanceOnServer();
    return;
  }

  playerStand();
}

// EVENTS
betBtn.addEventListener('click', startRound);
hitBtn.addEventListener('click', playerHit);
standBtn.addEventListener('click', playerStand);
doubleBtn.addEventListener('click', playerDouble);

newRoundBtn.addEventListener('click', ()=>{
  if(inRound && !confirm('Masih dalam ronde. Reset?')) return;
  balance = 1000;
  currentBet=0;
  inRound=false;
  dealer=[]; 
  player=[];
  deck=[];
  dealerHidden=true;
  setMessage('Bank di-reset.', '');
  updateUI();
});

// KEYBOARD
window.addEventListener('keydown', e=>{
  if(e.key==='h') playerHit();
  if(e.key==='s') playerStand();
  if(e.key==='d') playerDouble();
  if(e.key==='Enter') startRound();
});

updateUI();

// TOP UP FEATURE
// Tambahkan variabel global untuk top up
let topUpAmount = 0;
let topUpHistory = [];

// DOM elements untuk top up
const topUpBtn = document.getElementById('top-up-btn');
const topUpModal = document.getElementById('top-up-modal');
const topUpClose = document.getElementById('top-up-close');
const topUpInput = document.getElementById('top-up-input');
const topUpConfirm = document.getElementById('top-up-confirm');
const topUpHistoryEl = document.getElementById('top-up-history');
const topUpBalanceEl = document.getElementById('top-up-balance');

// Fungsi untuk menampilkan modal top up
function showTopUpModal() {
  topUpModal.style.display = 'block';
  topUpInput.value = '';
  updateTopUpHistory();
}

// Fungsi untuk menyembunyikan modal top up
function hideTopUpModal() {
  topUpModal.style.display = 'none';
}

// Fungsi untuk memproses top up
function processTopUp() {
  const amount = Number(topUpInput.value) || 0;
  
  if (amount <= 0) {
    alert('Masukkan jumlah top up yang valid!');
    return;
  }
  
  if (amount > 1000000) {
    alert('Maksimal top up adalah 1.000.000!');
    return;
  }
  
  // Simulasi proses top up (dalam implementasi nyata, ini akan terhubung ke payment gateway)
  balance += amount;
  topUpAmount += amount;
  
  // Tambahkan ke riwayat top up
  topUpHistory.push({
    amount: amount,
    date: new Date().toLocaleString('id-ID'),
    balanceAfter: balance
  });
  
  // Update UI
  updateUI();
  updateTopUpHistory();
  
  // Tampilkan pesan sukses
  setMessage(`Top up berhasil! +${amount.toLocaleString('id-ID')}`, 'win');
  
  // Sembunyikan modal
  hideTopUpModal();
}

// Fungsi untuk memperbarui riwayat top up
function updateTopUpHistory() {
  if (!topUpHistoryEl) return;
  
  topUpHistoryEl.innerHTML = '';
  
  if (topUpHistory.length === 0) {
    topUpHistoryEl.innerHTML = '<p class="no-history">Belum ada riwayat top up</p>';
    return;
  }
  
  // Tampilkan maksimal 5 riwayat terbaru
  const recentHistory = topUpHistory.slice(-5).reverse();
  
  recentHistory.forEach(record => {
    const historyItem = document.createElement('div');
    historyItem.className = 'history-item';
    historyItem.innerHTML = `
      <div class="history-amount">+${record.amount.toLocaleString('id-ID')}</div>
      <div class="history-date">${record.date}</div>
      <div class="history-balance">Saldo: ${record.balanceAfter.toLocaleString('id-ID')}</div>
    `;
    topUpHistoryEl.appendChild(historyItem);
  });
}

// Fungsi untuk memperbarui tampilan saldo top up
function updateTopUpBalance() {
  if (topUpBalanceEl) {
    topUpBalanceEl.textContent = `Total Top Up: ${topUpAmount.toLocaleString('id-ID')}`;
  }
}

// Event listeners untuk top up
if (topUpBtn) {
  topUpBtn.addEventListener('click', showTopUpModal);
}

if (topUpClose) {
  topUpClose.addEventListener('click', hideTopUpModal);
}

if (topUpConfirm) {
  topUpConfirm.addEventListener('click', processTopUp);
}

// Tutup modal jika klik di luar modal
window.addEventListener('click', (e) => {
  if (e.target === topUpModal) {
    hideTopUpModal();
  }
});

// Keyboard shortcut untuk top up (Ctrl+T)
window.addEventListener('keydown', e => {
  if (e.ctrlKey && e.key === 't') {
    e.preventDefault();
    showTopUpModal();
  }
});

// Modifikasi fungsi updateUI untuk menampilkan informasi top up
const originalUpdateUI = updateUI;
updateUI = function() {
  originalUpdateUI();`        []`
  updateTopUpBalance();
};

// Modifikasi fungsi newRound untuk reset saldo yang tidak mempengaruhi riwayat top up
const originalNewRound = newRoundBtn.onclick;
newRoundBtn.onclick = function() {
  if (inRound && !confirm('Masih dalam ronde. Reset?')) return;
  
  // Reset saldo tapi pertahankan riwayat top up
  const currentTopUpAmount = topUpAmount;
  balance = 1000 + currentTopUpAmount;
  currentBet = 0;
  inRound = false;
  dealer = []; 
  player = [];
  deck = [];
  dealerHidden = true;
  setMessage('Bank di-reset.', '');
  updateUI();
};

// Inisialisasi
updateTopUpHistory();
updateTopUpBalance();