// main.js - Frontend logic for the main page

let currentUsername = '';

// DOM elements
const userForm = document.getElementById('userForm');
const usernameInput = document.getElementById('username');
const loadingSection = document.getElementById('loading');
const errorSection = document.getElementById('error');
const userInfoSection = document.getElementById('userInfo');

// Initialize event listeners
document.addEventListener('DOMContentLoaded', function() {
    userForm.addEventListener('submit', handleFormSubmit);
    
    // Auto-focus username input
    usernameInput.focus();
    
    // Allow Enter key to submit
    usernameInput.addEventListener('keypress', function(e) {
        if (e.key === 'Enter') {
            handleFormSubmit(e);
        }
    });
});

// Handle form submission
async function handleFormSubmit(e) {
    e.preventDefault();
    
    const username = usernameInput.value.trim();
    if (!username) {
        showError('Please enter a username');
        return;
    }

    // Validate username format
    if (!/^[a-zA-Z0-9_-]+$/.test(username)) {
        showError('Username can only contain letters, numbers, underscores, and hyphens');
        return;
    }

    currentUsername = username;
    await fetchUserData(username);
}

// Fetch user data from API
async function fetchUserData(username) {
    showLoading();
    
    try {
        console.log(`Fetching data for user: ${username}`);
        
        const response = await fetch(`/api/userinfo?username=${encodeURIComponent(username)}`);
        const data = await response.json();
        
        if (!response.ok) {
            throw new Error(data.message || 'Failed to fetch user data');
        }
        
        console.log('User data received:', data);
        displayUserData(data);
        
    } catch (error) {
        console.error('Error fetching user data:', error);
        showError(error.message || 'Failed to load user data. Please try again.');
    }
}

// Display user data in the UI
function displayUserData(data) {
    const { user, lastGame, lastAchievement } = data;
    
    // Update user profile
    document.getElementById('userName').textContent = user.displayName;
    document.getElementById('userMotto').textContent = user.motto || 'No motto set';
    document.getElementById('totalPoints').textContent = user.totalPoints.toLocaleString();
    document.getElementById('truePoints').textContent = user.totalTruePoints.toLocaleString();
    
    // Format member since date
    if (user.memberSince) {
        const memberDate = new Date(user.memberSince);
        document.getElementById('memberSince').textContent = memberDate.toLocaleDateString();
    }
    
    // Set avatar
    const avatarImg = document.getElementById('userAvatar');
    if (user.avatar) {
        avatarImg.src = user.avatar;
        avatarImg.style.display = 'block';
    } else {
        avatarImg.style.display = 'none';
    }
    
    // Display last game
    const lastGameSection = document.getElementById('lastGameSection');
    if (lastGame) {
        document.getElementById('gameTitle').textContent = lastGame.title;
        document.getElementById('consoleName').textContent = lastGame.consoleName;
        
        const gameIconImg = document.getElementById('gameIcon');
        if (lastGame.icon) {
            gameIconImg.src = lastGame.icon;
            gameIconImg.style.display = 'block';
        } else {
            gameIconImg.style.display = 'none';
        }
        lastGameSection.style.display = 'block';
    } else {
        lastGameSection.style.display = 'none';
    }
    
    // Display last achievement
    const lastAchievementSection = document.getElementById('lastAchievementSection');
    if (lastAchievement) {
        document.getElementById('achievementTitle').textContent = lastAchievement.title;
        document.getElementById('achievementDescription').textContent = lastAchievement.description;
        document.getElementById('achievementPoints').textContent = lastAchievement.points;
        document.getElementById('achievementTrueRatio').textContent = lastAchievement.trueRatio;
        
        // Set achievement badge (try badgeName first, then gameIcon as fallback)
        const achievementBadgeImg = document.getElementById('achievementBadge');
        // For now, we'll use the game icon since badges aren't in the current API response
        if (lastAchievement.gameIcon) {
            achievementBadgeImg.src = lastAchievement.gameIcon;
            achievementBadgeImg.style.display = 'block';
        } else {
            achievementBadgeImg.style.display = 'none';
        }
        lastAchievementSection.style.display = 'block';
    } else {
        lastAchievementSection.style.display = 'none';
    }
    
    // Setup overlay URL and link
    const overlayUrl = `${window.location.origin}/overlay/${encodeURIComponent(currentUsername)}`;
    document.getElementById('overlayUrl').value = overlayUrl;
    document.getElementById('overlayLink').href = overlayUrl;
    
    showUserInfo();
}

// UI state management functions
function showLoading() {
    hideAllSections();
    loadingSection.classList.remove('hidden');
}

function showError(message) {
    hideAllSections();
    document.querySelector('.error-message').textContent = message;
    errorSection.classList.remove('hidden');
}

function showUserInfo() {
    hideAllSections();
    userInfoSection.classList.remove('hidden');
}

function hideAllSections() {
    loadingSection.classList.add('hidden');
    errorSection.classList.add('hidden');
    userInfoSection.classList.add('hidden');
}

function clearError() {
    showUserInfo();
}

// Copy overlay URL to clipboard
async function copyOverlayUrl() {
    const overlayUrlInput = document.getElementById('overlayUrl');
    
    try {
        await navigator.clipboard.writeText(overlayUrlInput.value);
        
        // Show feedback
        const button = event.target;
        const originalText = button.textContent;
        button.textContent = 'Copied!';
        button.style.background = '#28a745';
        
        setTimeout(() => {
            button.textContent = originalText;
            button.style.background = '';
        }, 2000);
        
    } catch (err) {
        // Fallback for older browsers
        overlayUrlInput.select();
        document.execCommand('copy');
        alert('Overlay URL copied to clipboard!');
    }
}