// Initialize charts
let liveFeedChart, distributionChart, anomalyChart, lossTrendChart;

// Simulate telemetry data
let packetCounter = 0;
let missingPackets = 0;
let anomalies = 0;
let isTimelinePaused = false;
let timelineData = [];
document.addEventListener('DOMContentLoaded', function() {
    // Only initialize if on dashboard page
    if (document.getElementById('live-feed-chart')) {
        initCharts();
        simulateTelemetryData();
        document.getElementById('pause-timeline').addEventListener('click', toggleTimeline);
    }
    
    // Set active nav link based on current page
    const navLinks = document.querySelectorAll('custom-navbar a');
    navLinks.forEach(link => {
        if (link.getAttribute('href') === window.location.pathname) {
            link.classList.add('active');
        } else {
            link.classList.remove('active');
        }
    });
});

function initCharts() {
    const ctx1 = document.getElementById('live-feed-chart').getContext('2d');
    liveFeedChart = new Chart(ctx1, {
        type: 'line',
        data: {
            labels: Array(20).fill().map((_, i) => i),
            datasets: [{
                label: 'Packet Rate',
                data: Array(20).fill(0),
                borderColor: 'rgb(96, 165, 250)',
                tension: 0.1,
                fill: true,
                backgroundColor: 'rgba(96, 165, 250, 0.1)'
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
                legend: { display: false }
            },
            scales: {
                y: { beginAtZero: true },
                x: { display: false }
            }
        }
    });

    const ctx2 = document.getElementById('packet-distribution-chart').getContext('2d');
    distributionChart = new Chart(ctx2, {
        type: 'doughnut',
        data: {
            labels: ['Command', 'Telemetry', 'Science', 'Engineering'],
            datasets: [{
                data: [25, 40, 20, 15],
                backgroundColor: [
                    'rgba(59, 130, 246, 0.8)',
                    'rgba(139, 92, 246, 0.8)',
                    'rgba(16, 185, 129, 0.8)',
                    'rgba(245, 158, 11, 0.8)'
                ]
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false
        }
    });

    const ctx3 = document.getElementById('anomaly-detection-chart').getContext('2d');
    anomalyChart = new Chart(ctx3, {
        type: 'bar',
        data: {
            labels: ['Temperature', 'Power', 'Radiation', 'Comms', 'Orientation'],
            datasets: [{
                label: 'Anomaly Score',
                data: [0.2, 0.1, 0.05, 0.3, 0.15],
                backgroundColor: 'rgba(239, 68, 68, 0.8)'
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            scales: {
                y: { max: 1 }
            }
        }
    });

    const ctx4 = document.getElementById('packet-loss-trend-chart').getContext('2d');
    lossTrendChart = new Chart(ctx4, {
        type: 'line',
        data: {
            labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
            datasets: [{
                label: 'Packet Loss %',
                data: [2.1, 1.8, 1.5, 1.2, 0.9, 1.1],
                borderColor: 'rgb(239, 68, 68)',
                tension: 0.1
            }]
        },
        options: {
            responsive: true,
            maintainAspectRatio: false,
            plugins: {
                legend: { display: false }
            }
        }
    });
}

function simulateTelemetryData() {
    setInterval(() => {
        if (Math.random() < 0.95) { // 95% packet reception rate
            packetCounter++;
            
            // Update live feed chart
            liveFeedChart.data.datasets[0].data.shift();
            liveFeedChart.data.datasets[0].data.push(Math.floor(Math.random() * 100));
            liveFeedChart.update();
            
            // Add to timeline if not paused
            if (!isTimelinePaused) {
                const now = new Date();
                const packet = {
                    id: packetCounter,
                    timestamp: now.toISOString(),
                    type: ['CMD', 'TLM', 'SCI', 'ENG'][Math.floor(Math.random() * 4)],
                    size: Math.floor(Math.random() * 1024) + 128,
                    hasAnomaly: Math.random() < 0.05
                };
                
                if (packet.hasAnomaly) anomalies++;
                
                timelineData.unshift(packet);
                updateTimeline();
                updateRawData(packet);
            }
        } else {
            missingPackets++;
        }
        
        // Update counters
        document.getElementById('packet-count').textContent = packetCounter;
        document.getElementById('missing-count').textContent = missingPackets;
        document.getElementById('anomaly-count').textContent = anomalies;
    }, 500);
}

function updateTimeline() {
    const timeline = document.getElementById('packet-timeline');
    timeline.innerHTML = '';
    
    timelineData.slice(0, 20).forEach(packet => {
        const item = document.createElement('div');
        item.className = `flex items-center justify-between p-2 rounded-lg ${packet.hasAnomaly ? 'bg-red-900/50' : 'bg-gray-700/50'}`;
        
        item.innerHTML = `
            <div class="flex items-center">
                <span class="text-xs font-mono text-gray-400 mr-2">${packet.timestamp.split('T')[1].substring(0, 8)}</span>
                <span class="font-mono ${packet.hasAnomaly ? 'text-red-400' : 'text-blue-400'}">${packet.type}-${packet.id.toString().padStart(6, '0')}</span>
            </div>
            <span class="text-xs text-gray-400">${packet.size} bytes</span>
        `;
        
        timeline.appendChild(item);
    });
}

function updateRawData(packet) {
    const rawData = document.getElementById('raw-data');
    const packetText = `${packet.timestamp} - ${packet.type}-${packet.id.toString().padStart(6, '0')} - Size: ${packet.size} bytes${packet.hasAnomaly ? ' - ANOMALY DETECTED!' : ''}\n`;
    
    // Keep only last 20 lines
    const currentText = rawData.textContent;
    const lines = currentText.split('\n').slice(0, 19);
    lines.unshift(packetText);
    rawData.textContent = lines.join('\n');
}

function toggleTimeline() {
    isTimelinePaused = !isTimelinePaused;
    const button = document.getElementById('pause-timeline');
    const status = document.getElementById('timeline-status');
    
    if (isTimelinePaused) {
        button.innerHTML = '<i data-feather="play" class="mr-2"></i> Resume';
        status.textContent = 'Paused';
        status.classList.remove('text-green-400', 'live-indicator');
        status.classList.add('text-yellow-400');
    } else {
        button.innerHTML = '<i data-feather="pause" class="mr-2"></i> Pause';
        status.textContent = 'Live';
        status.classList.add('text-green-400', 'live-indicator');
        status.classList.remove('text-yellow-400');
    }
    feather.replace();
}