document.addEventListener('DOMContentLoaded', function() {
    // Simulate system stats updates
    function updateSystemStats() {
        const stats = [
            { selector: '.cpu-usage', min: 5, max: 40 },
            { selector: '.memory-usage', min: 2, max: 7 },
            { selector: '.network-speed', min: 5, max: 25 }
        ];
        
        stats.forEach(stat => {
            const element = document.querySelector(stat.selector);
            if (element) {
                const value = Math.floor(Math.random() * (stat.max - stat.min + 1)) + stat.min;
                element.textContent = `${value}${stat.selector === '.network-speed' ? 'Mbps' : '%'}`;
            }
        });
    }
    
    // Update stats every 3 seconds
    setInterval(updateSystemStats, 3000);
    updateSystemStats();
    
    // Terminal simulation
    const terminalElement = document.querySelector('.terminal');
    if (terminalElement) {
        const commands = [
            { cmd: 'ls -la', output: 'total 48\ndrwxr-xr-x 5 user user  4096 Dec 10 14:30 .\ndrwxr-xr-x 3 root root  4096 Nov 28 09:15 ..\n-rw------- 1 user user  1352 Dec  9 16:42 .bash_history\n-rw-r--r-- 1 user user   220 Nov 28 09:15 .bash_logout\n-rw-r--r-- 1 user user  3771 Nov 28 09:15 .bashrc\ndrwx------ 3 user user  4096 Dec  1 11:20 .cache\ndrwx------ 3 user user  4096 Dec  1 11:20 .config\n-rw-r--r-- 1 user user   807 Nov 28 09:15 .profile\n-rw-r--r-- 1 user user     0 Dec  3 17:55 .sudo_as_admin_successful' },
            { cmd: 'uname -a', output: 'Linux penguinOS 5.4.0-91-generic #102-Ubuntu SMP Fri Nov 5 16:31:28 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux' },
            { cmd: 'free -h', output: '              total        used        free      shared  buff/cache   available\nMem:           7.7Gi       3.2Gi       2.1Gi       345Mi       2.4Gi       4.0Gi\nSwap:          2.0Gi       0.0Ki       2.0Gi' }
        ];
        
        let currentCommand = 0;
        
        function typeWriter(text, element, speed, callback) {
            let i = 0;
            function typing() {
                if (i < text.length) {
                    element.innerHTML += text.charAt(i);
                    i++;
                    setTimeout(typing, speed);
                } else if (callback) {
                    callback();
                }
            }
            typing();
        }
        
        function runNextCommand() {
            if (currentCommand < commands.length) {
                const command = commands[currentCommand];
                const commandLine = document.createElement('div');
                commandLine.className = 'command-line';
                commandLine.innerHTML = `<span class="prompt">user@penguinos:~$</span> <span class="command">${command.cmd}</span>`;
                terminalElement.appendChild(commandLine);
                
                setTimeout(() => {
                    const output = document.createElement('div');
                    output.className = 'command-output';
                    terminalElement.appendChild(output);
                    typeWriter(command.output, output, 10, () => {
                        currentCommand++;
                        setTimeout(runNextCommand, 1000);
                    });
                }, 500);
            }
        }
        
        runNextCommand();
    }
    // Toggle sidebar on mobile
    const menuButton = document.querySelector('[data-feather="menu"]');
    if (menuButton) {
        menuButton.addEventListener('click', function() {
            const sidebar = document.querySelector('.w-64');
            sidebar.classList.toggle('hidden');
            sidebar.classList.toggle('block');
        });
    }

    // Notification button functionality
    const notificationsBtn = document.getElementById('notifications-btn');
    if (notificationsBtn) {
        notificationsBtn.addEventListener('click', function() {
            alert('No new notifications');
        });
    }

    // Messages button functionality
    const messagesBtn = document.getElementById('messages-btn');
    if (messagesBtn) {
        messagesBtn.addEventListener('click', function() {
            alert('Message system coming soon!');
        });
    }

    // Power button functionality
    const powerBtn = document.getElementById('power-btn');
    if (powerBtn) {
        powerBtn.addEventListener('click', function() {
            if (confirm('Are you sure you want to shut down PenguinOS?')) {
                alert('System shutting down...');
                // In a real app, this would trigger an actual shutdown
                document.body.innerHTML = '<div class="flex items-center justify-center h-screen bg-black text-white text-2xl">PenguinOS is now shutting down...</div>';
            }
        });
    }

    // Make sidebar links functional
    const sidebarLinks = document.querySelectorAll('.w-64 nav a');
    sidebarLinks.forEach(link => {
        link.addEventListener('click', function(e) {
            e.preventDefault();
            const icon = this.querySelector('i');
            const appName = this.textContent.trim();
            alert(`Launching ${appName}...`);
        });
    });

    // Make quick access links functional
    const quickAccessLinks = document.querySelectorAll('.quick-access a');
    quickAccessLinks.forEach(link => {
        link.addEventListener('click', function(e) {
            e.preventDefault();
            const appName = this.querySelector('span').textContent;
            alert(`Opening ${appName}...`);
        });
    });
});