// API Configuration is loaded from config.js
// If API_CONFIG is not defined, the config.js file is missing
if (typeof API_CONFIG === 'undefined') {
    console.error('API_CONFIG is not defined. Please copy config.example.js to config.js and configure your credentials.');
    alert('Configuration Error: config.js file is missing. Please check the console for details.');
}

// GraphQL query executor
async function executeGraphQLQuery(query) {
    try {
        const response = await fetch(API_CONFIG.serverUrl, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'x-api-key': API_CONFIG.apiKey
            },
            body: JSON.stringify({ query })
        });

        if (!response.ok) {
            const errorText = await response.text();
            console.error('API Error:', errorText);
            throw new Error(`HTTP error! status: ${response.status}`);
        }

        const result = await response.json();

        if (result.errors) {
            console.error('GraphQL errors:', result.errors);
            throw new Error('GraphQL query failed');
        }

        return result.data;
    } catch (error) {
        console.error('API request failed:', error);
        throw error;
    }
}

// Fetch system metrics (CPU, Memory usage)
async function fetchSystemMetrics() {
    const query = `query { metrics { cpu { percentTotal } memory { total used free percentTotal } } }`;

    const data = await executeGraphQLQuery(query);
    return data.metrics;
}

// Fetch array and disk information
async function fetchArrayInfo() {
    const query = `query { array { state disks { name size status temp fsSize fsFree fsUsed } parityCheckStatus { status errors date } } }`;

    const data = await executeGraphQLQuery(query);
    return data.array;
}

// Fetch Docker container information
async function fetchDockerContainers() {
    const query = `query { docker { containers { id names state status autoStart } } }`;

    const data = await executeGraphQLQuery(query);
    return data.docker.containers;
}

// Update timestamp
function updateTimestamp() {
    const now = new Date();
    const formatted = now.toLocaleString('en-US', {
        year: 'numeric',
        month: '2-digit',
        day: '2-digit',
        hour: '2-digit',
        minute: '2-digit',
        second: '2-digit',
        hour12: false
    });
    document.getElementById('timestamp').textContent = formatted;
}

// Update CPU usage
function updateCPU(percentage) {
    const progressBar = document.getElementById('cpu-progress');
    const progressText = document.getElementById('cpu-text');

    progressBar.style.width = percentage + '%';
    progressText.textContent = percentage + '%';

    // Apply color coding
    progressBar.classList.remove('warning', 'critical');
    if (percentage >= 90) {
        progressBar.classList.add('critical');
    } else if (percentage >= 70) {
        progressBar.classList.add('warning');
    }
}

// Update Memory usage
function updateMemory(percentage) {
    const progressBar = document.getElementById('memory-progress');
    const progressText = document.getElementById('memory-text');

    progressBar.style.width = percentage + '%';
    progressText.textContent = percentage + '%';

    // Apply color coding
    progressBar.classList.remove('warning', 'critical');
    if (percentage >= 90) {
        progressBar.classList.add('critical');
    } else if (percentage >= 70) {
        progressBar.classList.add('warning');
    }
}

// Update Disk Ring Chart
function updateDiskRingChart(percentage, usedKB, totalKB) {
    const ring = document.getElementById('disk-ring');
    const text = document.getElementById('disk-percentage');
    const fraction = document.getElementById('disk-fraction');

    // SVG circle circumference calculation: 2 * PI * radius (radius = 80)
    const circumference = 2 * Math.PI * 80; // 502.65
    const offset = circumference - (percentage / 100) * circumference;

    ring.style.strokeDashoffset = offset;
    text.textContent = percentage + '%';

    // Calculate and display fraction (convert KB to TB, rounded to 2 decimals)
    const usedTB = (usedKB / 1024 / 1024 / 1024).toFixed(2);
    const totalTB = (totalKB / 1024 / 1024 / 1024).toFixed(2);
    fraction.textContent = `${usedTB} / ${totalTB} TB`;

    // Change color based on usage
    if (percentage >= 90) {
        ring.style.stroke = '#ffffff';
        text.style.fill = '#ffffff';
        fraction.style.fill = '#ffffff';
    } else if (percentage >= 70) {
        ring.style.stroke = '#ff00ff';
        text.style.fill = '#ff00ff';
        fraction.style.fill = '#ff00ff';
    } else {
        ring.style.stroke = '#00ffff';
        text.style.fill = '#00ffff';
        fraction.style.fill = '#00ffff';
    }
}

// Update Photos Ring Chart (Disk 7)
function updatePhotosRingChart(percentage, usedKB, totalKB) {
    const ring = document.getElementById('photos-ring');
    const text = document.getElementById('photos-percentage');
    const fraction = document.getElementById('photos-fraction');

    const circumference = 2 * Math.PI * 80;
    const offset = circumference - (percentage / 100) * circumference;

    ring.style.strokeDashoffset = offset;
    text.textContent = percentage + '%';

    const usedTB = (usedKB / 1024 / 1024 / 1024).toFixed(2);
    const totalTB = (totalKB / 1024 / 1024 / 1024).toFixed(2);
    fraction.textContent = `${usedTB} / ${totalTB} TB`;

    // Change color based on usage
    if (percentage >= 90) {
        ring.style.stroke = '#ffffff';
        text.style.fill = '#ffffff';
        fraction.style.fill = '#ffffff';
    } else if (percentage >= 70) {
        ring.style.stroke = '#ff00ff';
        text.style.fill = '#ff00ff';
        fraction.style.fill = '#ff00ff';
    } else {
        ring.style.stroke = '#00ffff';
        text.style.fill = '#00ffff';
        fraction.style.fill = '#00ffff';
    }
}

// Update Media Ring Chart (All disks except 6 and 7)
function updateMediaRingChart(percentage, usedKB, totalKB) {
    const ring = document.getElementById('media-ring');
    const text = document.getElementById('media-percentage');
    const fraction = document.getElementById('media-fraction');

    const circumference = 2 * Math.PI * 80;
    const offset = circumference - (percentage / 100) * circumference;

    ring.style.strokeDashoffset = offset;
    text.textContent = percentage + '%';

    const usedTB = (usedKB / 1024 / 1024 / 1024).toFixed(2);
    const totalTB = (totalKB / 1024 / 1024 / 1024).toFixed(2);
    fraction.textContent = `${usedTB} / ${totalTB} TB`;

    // Change color based on usage
    if (percentage >= 90) {
        ring.style.stroke = '#ffffff';
        text.style.fill = '#ffffff';
        fraction.style.fill = '#ffffff';
    } else if (percentage >= 70) {
        ring.style.stroke = '#ff00ff';
        text.style.fill = '#ff00ff';
        fraction.style.fill = '#ff00ff';
    } else {
        ring.style.stroke = '#00ffff';
        text.style.fill = '#00ffff';
        fraction.style.fill = '#00ffff';
    }
}

// Update Docker Ring Chart (Disk 6)
function updateDockerRingChart(percentage, usedKB, totalKB) {
    const ring = document.getElementById('docker-ring');
    const text = document.getElementById('docker-percentage');
    const fraction = document.getElementById('docker-fraction');

    const circumference = 2 * Math.PI * 80;
    const offset = circumference - (percentage / 100) * circumference;

    ring.style.strokeDashoffset = offset;
    text.textContent = percentage + '%';

    const usedTB = (usedKB / 1024 / 1024 / 1024).toFixed(2);
    const totalTB = (totalKB / 1024 / 1024 / 1024).toFixed(2);
    fraction.textContent = `${usedTB} / ${totalTB} TB`;

    // Change color based on usage
    if (percentage >= 90) {
        ring.style.stroke = '#ffffff';
        text.style.fill = '#ffffff';
        fraction.style.fill = '#ffffff';
    } else if (percentage >= 70) {
        ring.style.stroke = '#ff00ff';
        text.style.fill = '#ff00ff';
        fraction.style.fill = '#ff00ff';
    } else {
        ring.style.stroke = '#00ffff';
        text.style.fill = '#00ffff';
        fraction.style.fill = '#00ffff';
    }
}

// Update Parity status
function updateParity(parityData) {
    const statusElement = document.getElementById('parity-status');
    const errorsElement = document.getElementById('parity-errors');

    statusElement.textContent = parityData.status;
    errorsElement.textContent = parityData.errors;

    if (parityData.status !== 'VALID' || parityData.errors > 0) {
        statusElement.classList.add('error');
        errorsElement.classList.add('error');
    } else {
        statusElement.classList.remove('error');
        errorsElement.classList.remove('error');
    }

    document.getElementById('parity-last-check').textContent = parityData.lastCheck;
}

// Update Disk Array
function updateDisks(disks) {
    const container = document.getElementById('disk-container');
    container.innerHTML = '';

    disks.forEach(disk => {
        const diskElement = document.createElement('div');
        diskElement.className = 'disk-item';

        const usedPercentage = disk.used;
        let progressClass = '';
        if (usedPercentage >= 90) {
            progressClass = 'critical';
        } else if (usedPercentage >= 80) {
            progressClass = 'warning';
        }

        // Add label for disk6 and disk7
        let diskLabel = disk.name;
        if (disk.name === 'disk6') {
            diskLabel = disk.name + ' (docker)';
        } else if (disk.name === 'disk7') {
            diskLabel = disk.name + ' (photos)';
        }

        diskElement.innerHTML = `
            <div class="disk-header">
                <span class="disk-name">${diskLabel}</span>
                <span class="disk-info">${disk.size} | ${disk.temperature}</span>
            </div>
            <div class="progress-bar">
                <div class="progress-fill ${progressClass}" style="width: ${usedPercentage}%"></div>
                <span class="progress-text">${usedPercentage}% USED</span>
            </div>
        `;

        container.appendChild(diskElement);
    });
}

// Update Docker Containers
function updateDocker(containers) {
    const container = document.getElementById('docker-container');

    const gridDiv = document.createElement('div');
    gridDiv.className = 'docker-grid';

    containers.forEach(docker => {
        const dockerElement = document.createElement('div');
        dockerElement.className = 'docker-item';

        dockerElement.innerHTML = `
            <div class="docker-name">${docker.name}</div>
            <div class="docker-status ${docker.status}">${docker.status.toUpperCase()}</div>
        `;

        gridDiv.appendChild(dockerElement);
    });

    container.innerHTML = '';
    container.appendChild(gridDiv);
}

// Process and update all dashboard data
async function updateDashboard() {
    try {
        // Fetch all data in parallel
        const [metrics, arrayInfo, dockerContainers] = await Promise.all([
            fetchSystemMetrics(),
            fetchArrayInfo(),
            fetchDockerContainers()
        ]);

        // Update CPU usage from metrics
        if (metrics.cpu && metrics.cpu.percentTotal !== undefined) {
            const cpuUsage = Math.round(metrics.cpu.percentTotal);
            updateCPU(cpuUsage);
        }

        // Update Memory usage from metrics
        if (metrics.memory && metrics.memory.percentTotal !== undefined) {
            const memoryPercentage = Math.round(metrics.memory.percentTotal);
            updateMemory(memoryPercentage);
        }

        // Update Parity status
        if (arrayInfo.parityCheckStatus) {
            const parity = arrayInfo.parityCheckStatus;
            const parityData = {
                status: parity.status || 'UNKNOWN',
                lastCheck: parity.date || 'N/A',
                errors: parity.errors || 0
            };
            updateParity(parityData);
        }

        // Update Disks
        if (arrayInfo.disks && arrayInfo.disks.length > 0) {
            console.log('Processing disks:', arrayInfo.disks);

            // Calculate total disk usage across all disks
            let totalCapacity = 0;
            let totalUsed = 0;
            let dockerCapacity = 0;
            let dockerUsed = 0;
            let photosCapacity = 0;
            let photosUsed = 0;
            let mediaCapacity = 0;
            let mediaUsed = 0;

            const disksData = arrayInfo.disks.map(disk => {
                // Use filesystem data from the disk itself (fsSize, fsUsed are in KB)
                const total = disk.fsSize || disk.size || 0;
                const used = disk.fsUsed || 0;
                const usedPercentage = total > 0 ? Math.round((used / total) * 100) : 0;

                // Accumulate totals for ring charts
                totalCapacity += total;
                totalUsed += used;

                // Docker = disk6
                if (disk.name === 'disk6') {
                    dockerCapacity = total;
                    dockerUsed = used;
                }

                // Photos = disk7
                if (disk.name === 'disk7') {
                    photosCapacity = total;
                    photosUsed = used;
                }

                // Media = all disks except disk6 and disk7
                if (disk.name !== 'disk6' && disk.name !== 'disk7') {
                    mediaCapacity += total;
                    mediaUsed += used;
                }

                // Handle temperature - could be null, number, or NaN
                let temperature = 'N/A';
                if (disk.temp !== null && disk.temp !== undefined && !isNaN(disk.temp)) {
                    temperature = disk.temp + '°C';
                }

                return {
                    name: disk.name || 'Unknown',
                    size: formatBytes(total * 1024), // Convert KB to bytes for formatting
                    used: usedPercentage,
                    temperature: temperature
                };
            });

            // Update ring charts
            const totalUsagePercentage = totalCapacity > 0 ? Math.round((totalUsed / totalCapacity) * 100) : 0;
            console.log('Total usage:', { totalUsagePercentage, totalUsed, totalCapacity });
            updateDiskRingChart(totalUsagePercentage, totalUsed, totalCapacity);

            const dockerUsagePercentage = dockerCapacity > 0 ? Math.round((dockerUsed / dockerCapacity) * 100) : 0;
            console.log('Docker usage:', { dockerUsagePercentage, dockerUsed, dockerCapacity });
            updateDockerRingChart(dockerUsagePercentage, dockerUsed, dockerCapacity);

            const photosUsagePercentage = photosCapacity > 0 ? Math.round((photosUsed / photosCapacity) * 100) : 0;
            console.log('Photos usage:', { photosUsagePercentage, photosUsed, photosCapacity });
            updatePhotosRingChart(photosUsagePercentage, photosUsed, photosCapacity);

            const mediaUsagePercentage = mediaCapacity > 0 ? Math.round((mediaUsed / mediaCapacity) * 100) : 0;
            console.log('Media usage:', { mediaUsagePercentage, mediaUsed, mediaCapacity });
            updateMediaRingChart(mediaUsagePercentage, mediaUsed, mediaCapacity);

            console.log('Processed disk data:', disksData);
            updateDisks(disksData);
        } else {
            console.log('No disks data available');
        }

        // Update Docker containers
        if (dockerContainers && dockerContainers.length > 0) {
            console.log('Processing docker containers:', dockerContainers);
            const dockerData = dockerContainers.map(container => {
                // Extract container name (remove leading slash if present)
                const name = container.names[0] ? container.names[0].replace(/^\//, '') : 'Unknown';
                let state = container.state.toLowerCase();

                // Map "exited" to "offline"
                if (state === 'exited') {
                    state = 'offline';
                }

                return {
                    name: name,
                    status: state
                };
            });
            console.log('Processed docker data:', dockerData);
            updateDocker(dockerData);
        } else {
            console.log('No docker containers available');
        }

    } catch (error) {
        console.error('Dashboard update failed:', error);
        // Show error state in UI
        showError('Failed to fetch data from Unraid server. Retrying...');
    }
}

// Format bytes to human-readable format
function formatBytes(bytes) {
    if (!bytes || bytes === 0) return '0 B';

    const k = 1024;
    const sizes = ['B', 'KB', 'MB', 'GB', 'TB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));

    return Math.round((bytes / Math.pow(k, i)) * 100) / 100 + ' ' + sizes[i];
}

// Show error message
function showError(message) {
    const timestamp = document.getElementById('timestamp');
    if (timestamp) {
        timestamp.textContent = `ERROR: ${message}`;
        timestamp.style.color = '#ffffff';
    }
}

// Initialize dashboard
document.addEventListener('DOMContentLoaded', () => {
    updateDashboard();

    // Update every 5 seconds
    setInterval(updateDashboard, 5000);
});