/**
 * ATM Interface
 * Handles banking transactions with PIN authentication
 */

// Mock data
const mockData = {
    cash: 2500,
    bank: 45750,
    pin: '1234' // For demo purposes
};

// State
let enteredPin = '';
let currentView = 'welcomeView';

// View Management
function showView(viewId) {
    // Hide all views
    document.querySelectorAll('.atm-view').forEach(view => {
        view.style.display = 'none';
    });

    // Show selected view
    const view = document.getElementById(viewId);
    if (view) {
        view.style.display = 'flex';
        currentView = viewId;

        // Update balance displays when showing certain views
        if (viewId === 'menuView' || viewId === 'balanceView' || viewId === 'depositView') {
            updateBalances();
        }
    }
}

// PIN Entry
function enterPin(digit) {
    if (enteredPin.length < 4) {
        enteredPin += digit;
        updatePinDisplay();
    }
}

function clearPin() {
    enteredPin = '';
    updatePinDisplay();
}

function updatePinDisplay() {
    const dots = document.querySelectorAll('.pin-dot');
    dots.forEach((dot, index) => {
        if (index < enteredPin.length) {
            dot.classList.add('filled');
        } else {
            dot.classList.remove('filled');
        }
    });
}

function submitPin() {
    if (enteredPin.length !== 4) {
        showError('Please enter a 4-digit PIN');
        return;
    }

    // In a real implementation, this would validate with the server
    if (enteredPin === mockData.pin) {
        enteredPin = '';
        updatePinDisplay();
        showView('menuView');
    } else {
        showError('Incorrect PIN');
        clearPin();
    }
}

// Balance Updates
function updateBalances() {
    // Update all balance displays
    const cashElements = ['cashBalance', 'cashBalanceDetail', 'availableCash'];
    const bankElements = ['bankBalance', 'bankBalanceDetail'];

    cashElements.forEach(id => {
        const el = document.getElementById(id);
        if (el) el.textContent = `$${mockData.cash.toLocaleString()}`;
    });

    bankElements.forEach(id => {
        const el = document.getElementById(id);
        if (el) el.textContent = `$${mockData.bank.toLocaleString()}`;
    });

    const totalEl = document.getElementById('totalBalance');
    if (totalEl) {
        const total = mockData.cash + mockData.bank;
        totalEl.textContent = `$${total.toLocaleString()}`;
    }
}

// Withdraw Functions
function withdrawAmount(amount) {
    if (amount > mockData.bank) {
        showError('Insufficient funds');
        return;
    }

    mockData.bank -= amount;
    mockData.cash += amount;

    // sendEvent('atm::withdraw', { amount: amount });
    showSuccess(`Withdrew $${amount.toLocaleString()}`);
}

function withdrawCustom() {
    const input = document.getElementById('withdrawInput');
    const amount = parseFloat(input.value);

    if (!amount || amount <= 0) {
        showError('Please enter a valid amount');
        return;
    }

    if (amount > mockData.bank) {
        showError('Insufficient funds');
        return;
    }

    mockData.bank -= amount;
    mockData.cash += amount;

    // sendEvent('atm::withdraw', { amount: amount });
    input.value = '';
    showSuccess(`Withdrew $${amount.toLocaleString()}`);
}

// Deposit Functions
function depositAmount() {
    const input = document.getElementById('depositInput');
    const amount = parseFloat(input.value);

    if (!amount || amount <= 0) {
        showError('Please enter a valid amount');
        return;
    }

    if (amount > mockData.cash) {
        showError('Insufficient cash');
        return;
    }

    mockData.cash -= amount;
    mockData.bank += amount;

    // sendEvent('atm::deposit', { amount: amount });
    input.value = '';
    showSuccess(`Deposited $${amount.toLocaleString()}`);
}

function depositAll() {
    if (mockData.cash <= 0) {
        showError('No cash to deposit');
        return;
    }

    const amount = mockData.cash;
    mockData.cash = 0;
    mockData.bank += amount;

    // sendEvent('atm::deposit', { amount: amount });
    showSuccess(`Deposited $${amount.toLocaleString()}`);
}

// Transfer Function
function transferFunds() {
    const playerIdInput = document.getElementById('transferPlayerId');
    const amountInput = document.getElementById('transferAmount');

    const playerId = playerIdInput.value.trim();
    const amount = parseFloat(amountInput.value);

    if (!playerId) {
        showError('Please enter a player ID');
        return;
    }

    if (!amount || amount <= 0) {
        showError('Please enter a valid amount');
        return;
    }

    if (amount > mockData.bank) {
        showError('Insufficient funds');
        return;
    }

    mockData.bank -= amount;

    // sendEvent('atm::transfer', {
    //     playerId: playerId,
    //     amount: amount
    // });

    playerIdInput.value = '';
    amountInput.value = '';

    showSuccess(`Transferred $${amount.toLocaleString()} to Player ${playerId}`);
}

// Result Screens
function showSuccess(message) {
    document.getElementById('successMessage').textContent = message;
    showView('successView');
    updateBalances();
}

function showError(message) {
    document.getElementById('errorMessage').textContent = message;
    showView('errorView');
}

// Exit ATM
function exitATM() {
    enteredPin = '';
    updatePinDisplay();
    sendEvent('atm::exit', {});
    showView('welcomeView');
}

// Send event to Arma
function sendEvent(event, data) {
    if (typeof A3API !== 'undefined') {
        A3API.SendAlert(JSON.stringify({
            event: event,
            data: data
        }));
    } else {
        console.log('Event:', event, 'Data:', data);
    }
}

// Update ATM data from external source
function updateATMData(data) {
    if (data.cash !== undefined) {
        mockData.cash = data.cash;
    }
    if (data.bank !== undefined) {
        mockData.bank = data.bank;
    }
    updateBalances();
}

// Initialize
function initATM() {
    console.log('ATM interface initializing...');

    // Show welcome screen
    showView('welcomeView');

    // Update initial balances
    updateBalances();

    console.log('ATM interface initialized');
}

// Auto-initialize
if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', initATM);
} else {
    initATM();
}

// Expose functions globally
window.showView = showView;
window.enterPin = enterPin;
window.clearPin = clearPin;
window.submitPin = submitPin;
window.withdrawAmount = withdrawAmount;
window.withdrawCustom = withdrawCustom;
window.depositAmount = depositAmount;
window.depositAll = depositAll;
window.transferFunds = transferFunds;
window.exitATM = exitATM;
window.updateATMData = updateATMData;