let drives = [];
let driveCounter = 0;

const driveTypes = {
    'IBM ULT3580-TD5': { vendor: 'IBM', product: 'ULT3580-TD5', type: 'LTO-5' },
    'IBM ULT3580-TD6': { vendor: 'IBM', product: 'ULT3580-TD6', type: 'LTO-6' },
    'IBM ULT3580-TD7': { vendor: 'IBM', product: 'ULT3580-TD7', type: 'LTO-7' },
    'IBM ULT3580-TD8': { vendor: 'IBM', product: 'ULT3580-TD8', type: 'LTO-8' },
    'IBM ULT3580-TD9': { vendor: 'IBM', product: 'ULT3580-TD9', type: 'LTO-9' },
    'HP Ultrium 5-SCSI': { vendor: 'HP', product: 'Ultrium 5-SCSI', type: 'LTO-5' },
    'HP Ultrium 6-SCSI': { vendor: 'HP', product: 'Ultrium 6-SCSI', type: 'LTO-6' },
};

document.addEventListener('DOMContentLoaded', function() {
    initNavigation();
    addDefaultDrives();
    generateConfig();
});

function initNavigation() {
    const navLinks = document.querySelectorAll('.nav-link');
    navLinks.forEach(link => {
        link.addEventListener('click', function(e) {
            e.preventDefault();
            const targetId = this.getAttribute('href').substring(1);
            
            document.querySelectorAll('.nav-link').forEach(l => l.classList.remove('active'));
            document.querySelectorAll('.section').forEach(s => s.classList.remove('active'));
            
            this.classList.add('active');
            document.getElementById(targetId).classList.add('active');
        });
    });
}

function addDefaultDrives() {
    for (let i = 0; i < 4; i++) {
        addDrive(i < 2 ? 'IBM ULT3580-TD5' : 'IBM ULT3580-TD6');
    }
}

function addDrive(driveType = 'IBM ULT3580-TD5') {
    const driveId = driveCounter++;
    const drive = {
        id: driveId,
        driveNum: drives.length,
        channel: 0,
        target: drives.length + 1,
        lun: 0,
        libraryId: 10,
        slot: drives.length + 1,
        type: driveType,
        serial: `XYZZY_A${drives.length + 1}`,
        naa: `10:22:33:44:ab:cd:ef:0${drives.length + 1}`,
        compression: 3,
        compressionEnabled: 1,
        compressionType: 'lzo',
        backoff: 400
    };
    
    drives.push(drive);
    renderDrive(drive);
}

function renderDrive(drive) {
    const container = document.getElementById('drives-container');
    const driveInfo = driveTypes[drive.type];
    
    const driveCard = document.createElement('div');
    driveCard.className = 'drive-card';
    driveCard.id = `drive-${drive.id}`;
    
    driveCard.innerHTML = `
        <div class="drive-card-header">
            <h4>💾 Drive ${drive.driveNum}</h4>
            <button class="btn btn-danger" onclick="removeDrive(${drive.id})">
                <span>🗑️</span> Remove
            </button>
        </div>
        <div class="form-grid">
            <div class="form-group">
                <label>Drive Type</label>
                <select onchange="updateDriveType(${drive.id}, this.value)">
                    ${Object.keys(driveTypes).map(type => 
                        `<option value="${type}" ${type === drive.type ? 'selected' : ''}>${type}</option>`
                    ).join('')}
                </select>
            </div>
            <div class="form-group">
                <label>Drive Number</label>
                <input type="number" value="${drive.driveNum}" min="0" max="99" 
                    onchange="updateDrive(${drive.id}, 'driveNum', parseInt(this.value))">
            </div>
            <div class="form-group">
                <label>Channel</label>
                <input type="number" value="${drive.channel}" min="0" max="15" 
                    onchange="updateDrive(${drive.id}, 'channel', parseInt(this.value))">
            </div>
            <div class="form-group">
                <label>Target</label>
                <input type="number" value="${drive.target}" min="0" max="15" 
                    onchange="updateDrive(${drive.id}, 'target', parseInt(this.value))">
            </div>
            <div class="form-group">
                <label>LUN</label>
                <input type="number" value="${drive.lun}" min="0" max="7" 
                    onchange="updateDrive(${drive.id}, 'lun', parseInt(this.value))">
            </div>
            <div class="form-group">
                <label>Library ID</label>
                <input type="number" value="${drive.libraryId}" min="0" max="99" 
                    onchange="updateDrive(${drive.id}, 'libraryId', parseInt(this.value))">
            </div>
            <div class="form-group">
                <label>Slot</label>
                <input type="number" value="${drive.slot}" min="1" max="999" 
                    onchange="updateDrive(${drive.id}, 'slot', parseInt(this.value))">
            </div>
            <div class="form-group">
                <label>Serial Number</label>
                <input type="text" value="${drive.serial}" maxlength="10" 
                    onchange="updateDrive(${drive.id}, 'serial', this.value)">
            </div>
            <div class="form-group">
                <label>NAA</label>
                <input type="text" value="${drive.naa}" pattern="[0-9a-f:]+" 
                    onchange="updateDrive(${drive.id}, 'naa', this.value)">
            </div>
            <div class="form-group">
                <label>Compression Factor</label>
                <input type="number" value="${drive.compression}" min="1" max="10" 
                    onchange="updateDrive(${drive.id}, 'compression', parseInt(this.value))">
            </div>
            <div class="form-group">
                <label>Compression Type</label>
                <select onchange="updateDrive(${drive.id}, 'compressionType', this.value)">
                    <option value="lzo" ${drive.compressionType === 'lzo' ? 'selected' : ''}>LZO</option>
                    <option value="zlib" ${drive.compressionType === 'zlib' ? 'selected' : ''}>ZLIB</option>
                </select>
            </div>
            <div class="form-group">
                <label>Backoff (ms)</label>
                <input type="number" value="${drive.backoff}" min="0" max="10000" 
                    onchange="updateDrive(${drive.id}, 'backoff', parseInt(this.value))">
            </div>
        </div>
    `;
    
    container.appendChild(driveCard);
}

function updateDrive(driveId, field, value) {
    const drive = drives.find(d => d.id === driveId);
    if (drive) {
        drive[field] = value;
    }
}

function updateDriveType(driveId, type) {
    const drive = drives.find(d => d.id === driveId);
    if (drive) {
        drive.type = type;
    }
}

function removeDrive(driveId) {
    const index = drives.findIndex(d => d.id === driveId);
    if (index !== -1) {
        drives.splice(index, 1);
        document.getElementById(`drive-${driveId}`).remove();
        
        drives.forEach((drive, idx) => {
            drive.driveNum = idx;
        });
        
        document.getElementById('drives-container').innerHTML = '';
        drives.forEach(drive => renderDrive(drive));
    }
}

function generateConfig() {
    const libId = document.getElementById('lib-id').value;
    const libChannel = document.getElementById('lib-channel').value;
    const libTarget = document.getElementById('lib-target').value;
    const libLun = document.getElementById('lib-lun').value;
    const libVendor = document.getElementById('lib-vendor').value;
    const libProduct = document.getElementById('lib-product').value;
    const libSerial = document.getElementById('lib-serial').value;
    const libNaa = document.getElementById('lib-naa').value;
    const libHome = document.getElementById('lib-home').value;
    const libBackoff = document.getElementById('lib-backoff').value;
    
    let config = `VERSION: 5\n\n`;
    config += `Library: ${libId} CHANNEL: ${libChannel.padStart(2, '0')} TARGET: ${libTarget.padStart(2, '0')} LUN: ${libLun.padStart(2, '0')}\n`;
    config += ` Vendor identification: ${libVendor}\n`;
    config += ` Product identification: ${libProduct}\n`;
    config += ` Unit serial number: ${libSerial}\n`;
    config += ` NAA: ${libNaa}\n`;
    config += ` Home directory: ${libHome}\n`;
    config += ` Backoff: ${libBackoff}\n`;
    
    drives.forEach(drive => {
        const driveInfo = driveTypes[drive.type];
        config += `\nDrive: ${drive.driveNum.toString().padStart(2, '0')} CHANNEL: ${drive.channel.toString().padStart(2, '0')} TARGET: ${drive.target.toString().padStart(2, '0')} LUN: ${drive.lun.toString().padStart(2, '0')}\n`;
        config += ` Library ID: ${drive.libraryId} Slot: ${drive.slot.toString().padStart(2, '0')}\n`;
        config += ` Vendor identification: ${driveInfo.vendor}\n`;
        config += ` Product identification: ${driveInfo.product}\n`;
        config += ` Unit serial number: ${drive.serial}\n`;
        config += ` NAA: ${drive.naa}\n`;
        config += ` Compression: factor ${drive.compression} enabled ${drive.compressionEnabled}\n`;
        config += ` Compression type: ${drive.compressionType}\n`;
        config += ` Backoff: ${drive.backoff}\n`;
    });
    
    document.getElementById('config-preview').textContent = config;

    const tapeLibrary = document.getElementById('tape-library').value;
    const tapeBarcodePrefix = document.getElementById('tape-barcode-prefix').value;
    const tapeStartNum = parseInt(document.getElementById('tape-start-num').value);
    const tapeSize = document.getElementById('tape-size').value;
    const tapeMediaType = document.getElementById('tape-media-type').value;
    const tapeDensity = document.getElementById('tape-density').value;
    const tapeCount = parseInt(document.getElementById('tape-count').value);

    let installCmds = '#!/bin/bash\n';
    installCmds += '# Generate virtual tapes for mhvtl\n';
    installCmds += '# Run this script after mhvtl installation\n\n';

    for (let i = 0; i < tapeCount; i++) {
        const barcodeNum = String(tapeStartNum + i).padStart(6, '0');
        const barcode = `${tapeBarcodePrefix}${barcodeNum}`;
        installCmds += `mktape -l ${tapeLibrary} -m ${barcode} -s ${tapeSize} -t ${tapeMediaType} -d ${tapeDensity}\n`;
    }

    document.getElementById('install-command').textContent = installCmds;
}

function downloadConfig() {
    generateConfig();
    const config = document.getElementById('config-preview').textContent;
    const blob = new Blob([config], { type: 'text/plain' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = 'device.conf';
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    URL.revokeObjectURL(url);
    
    showNotification('Configuration downloaded successfully!', 'success');
}

function copyConfig() {
    generateConfig();
    const config = document.getElementById('config-preview').textContent;
    navigator.clipboard.writeText(config).then(() => {
        showNotification('Configuration copied to clipboard!', 'success');
    }).catch(() => {
        showNotification('Failed to copy configuration', 'danger');
    });
}

function copyInstallCommand() {
    const cmd = document.getElementById('install-command').textContent;
    navigator.clipboard.writeText(cmd).then(() => {
        showNotification('Command copied to clipboard!', 'success');
    }).catch(() => {
        showNotification('Failed to copy command', 'danger');
    });
}

function generateConfigText() {
    const libId = document.getElementById('lib-id').value;
    const libChannel = document.getElementById('lib-channel').value;
    const libTarget = document.getElementById('lib-target').value;
    const libLun = document.getElementById('lib-lun').value;
    const libVendor = document.getElementById('lib-vendor').value;
    const libProduct = document.getElementById('lib-product').value;
    const libSerial = document.getElementById('lib-serial').value;
    const libNaa = document.getElementById('lib-naa').value;
    const libHome = document.getElementById('lib-home').value;
    const libBackoff = document.getElementById('lib-backoff').value;

    let config = `VERSION: 5\n\n`;
    config += `Library: ${libId} CHANNEL: ${libChannel.padStart(2, '0')} TARGET: ${libTarget.padStart(2, '0')} LUN: ${libLun.padStart(2, '0')}\n`;
    config += ` Vendor identification: ${libVendor}\n`;
    config += ` Product identification: ${libProduct}\n`;
    config += ` Unit serial number: ${libSerial}\n`;
    config += ` NAA: ${libNaa}\n`;
    config += ` Home directory: ${libHome}\n`;
    config += ` Backoff: ${libBackoff}\n`;

    drives.forEach(drive => {
        const driveInfo = driveTypes[drive.type];
        config += `\nDrive: ${drive.driveNum.toString().padStart(2, '0')} CHANNEL: ${drive.channel.toString().padStart(2, '0')} TARGET: ${drive.target.toString().padStart(2, '0')} LUN: ${drive.lun.toString().padStart(2, '0')}\n`;
        config += ` Library ID: ${drive.libraryId} Slot: ${drive.slot.toString().padStart(2, '0')}\n`;
        config += ` Vendor identification: ${driveInfo.vendor}\n`;
        config += ` Product identification: ${driveInfo.product}\n`;
        config += ` Unit serial number: ${drive.serial}\n`;
        config += ` NAA: ${drive.naa}\n`;
        config += ` Compression: factor ${drive.compression} enabled ${drive.compressionEnabled}\n`;
        config += ` Compression type: ${drive.compressionType}\n`;
        config += ` Backoff: ${drive.backoff}\n`;
    });

    return config;
}

function applyConfig() {
    const config = generateConfigText();
    const resultDiv = document.getElementById('apply-result');

    resultDiv.style.display = 'block';
    resultDiv.className = 'alert alert-info';
    resultDiv.innerHTML = '<strong>⏳</strong> Applying configuration to server...';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'save_config',
            config: config
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            resultDiv.className = 'alert alert-success';
            resultDiv.innerHTML = `
                <strong>✅ Success!</strong> Configuration saved to ${data.file}<br>
                <small>Restart mhvtl service to apply changes using the button below.</small>
            `;
            showNotification('Configuration applied successfully!', 'success');
        } else {
            resultDiv.className = 'alert alert-danger';
            resultDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
            showNotification('Failed to apply configuration', 'danger');
        }
    })
    .catch(error => {
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
        showNotification('Failed to apply configuration', 'danger');
    });
}

function restartService() {
    const resultDiv = document.getElementById('restart-result');

    resultDiv.style.display = 'block';
    resultDiv.className = 'alert alert-info';
    resultDiv.innerHTML = '<strong>⏳</strong> Restarting mhvtl service...';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'restart_service'
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            resultDiv.className = 'alert alert-success';
            resultDiv.innerHTML = '<strong>✅ Success!</strong> Service restarted successfully';
            showNotification('Service restarted successfully!', 'success');
        } else {
            resultDiv.className = 'alert alert-danger';
            resultDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
            showNotification('Failed to restart service', 'danger');
        }
    })
    .catch(error => {
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
        showNotification('Failed to restart service', 'danger');
    });
}

function showNotification(message, type) {
    const notification = document.createElement('div');
    notification.className = `alert alert-${type}`;
    notification.style.position = 'fixed';
    notification.style.top = '20px';
    notification.style.right = '20px';
    notification.style.zIndex = '9999';
    notification.style.minWidth = '300px';
    notification.style.animation = 'slideIn 0.3s ease';
    notification.innerHTML = `<strong>${type === 'success' ? '✅' : '❌'}</strong> ${message}`;
    
    document.body.appendChild(notification);
    
    setTimeout(() => {
        notification.style.animation = 'slideOut 0.3s ease';
        setTimeout(() => {
            document.body.removeChild(notification);
        }, 300);
    }, 3000);
}

const style = document.createElement('style');
style.textContent = `
    @keyframes slideIn {
        from {
            transform: translateX(400px);
            opacity: 0;
        }
        to {
            transform: translateX(0);
            opacity: 1;
        }
    }

    @keyframes slideOut {
        from {
            transform: translateX(0);
            opacity: 1;
        }
        to {
            transform: translateX(400px);
            opacity: 0;
        }
    }
`;
document.head.appendChild(style);

let tapeListCache = [];

function loadTapeList() {
    const loadingDiv = document.getElementById('tape-list-loading');
    const errorDiv = document.getElementById('tape-list-error');
    const emptyDiv = document.getElementById('tape-list-empty');
    const containerDiv = document.getElementById('tape-list-container');

    loadingDiv.style.display = 'block';
    errorDiv.style.display = 'none';
    emptyDiv.style.display = 'none';
    containerDiv.style.display = 'none';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'list_tapes'
        })
    })
    .then(response => response.json())
    .then(data => {
        loadingDiv.style.display = 'none';

        if (data.success) {
            tapeListCache = data.tapes;
            if (data.tapes.length === 0) {
                emptyDiv.style.display = 'block';
            } else {
                containerDiv.style.display = 'block';
                renderTapeList(data.tapes);
            }
        } else {
            errorDiv.style.display = 'block';
            errorDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
        }
    })
    .catch(error => {
        loadingDiv.style.display = 'none';
        errorDiv.style.display = 'block';
        errorDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
    });
}

function renderTapeList(tapes) {
    const tbody = document.getElementById('tape-list-body');
    const countDisplay = document.getElementById('tape-count-display');

    tbody.innerHTML = '';
    countDisplay.textContent = tapes.length;

    tapes.forEach(tape => {
        const row = document.createElement('tr');
        row.innerHTML = `
            <td class="tape-barcode">${tape.name}</td>
            <td class="tape-size">${tape.size}</td>
            <td class="tape-date">${tape.modified}</td>
            <td class="tape-actions">
                <button class="btn btn-danger btn-small" onclick="deleteTape('${tape.name}')">
                    <span>🗑️</span> Delete
                </button>
            </td>
        `;
        tbody.appendChild(row);
    });
}

function filterTapes() {
    const searchTerm = document.getElementById('tape-search').value.toLowerCase();
    const filteredTapes = tapeListCache.filter(tape =>
        tape.name.toLowerCase().includes(searchTerm)
    );
    renderTapeList(filteredTapes);
}

function deleteTape(tapeName) {
    if (!confirm(`Are you sure you want to delete tape "${tapeName}"?\n\nThis action cannot be undone!`)) {
        return;
    }

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'delete_tape',
            tape_name: tapeName
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            showNotification(`Tape "${tapeName}" deleted successfully!`, 'success');
            loadTapeList();
        } else {
            showNotification(`Failed to delete tape: ${data.error}`, 'danger');
        }
    })
    .catch(error => {
        showNotification(`Error: ${error.message}`, 'danger');
    });
}

function bulkDeleteTapes() {
    const pattern = document.getElementById('bulk-delete-pattern').value.trim();
    const resultDiv = document.getElementById('bulk-delete-result');

    if (!pattern) {
        resultDiv.style.display = 'block';
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = '<strong>❌ Error:</strong> Please enter a delete pattern';
        return;
    }

    if (!confirm(`Are you sure you want to delete all tapes matching "${pattern}"?\n\nThis action cannot be undone!`)) {
        return;
    }

    resultDiv.style.display = 'block';
    resultDiv.className = 'alert alert-info';
    resultDiv.innerHTML = '<strong>⏳</strong> Deleting tapes...';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'bulk_delete_tapes',
            pattern: pattern
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            resultDiv.className = 'alert alert-success';
            resultDiv.innerHTML = `<strong>✅ Success!</strong> Deleted ${data.deleted_count} tape(s)`;
            showNotification(`Deleted ${data.deleted_count} tape(s)`, 'success');
            loadTapeList();
        } else {
            resultDiv.className = 'alert alert-danger';
            resultDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
        }
    })
    .catch(error => {
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
    });
}

function createTapes() {
    const library = document.getElementById('create-library').value;
    const barcodePrefix = document.getElementById('create-barcode-prefix').value.trim();
    const startNum = parseInt(document.getElementById('create-start-num').value);
    const count = parseInt(document.getElementById('create-count').value);
    const size = document.getElementById('create-size').value;
    const mediaType = document.getElementById('create-media-type').value;
    const density = document.getElementById('create-density').value;
    const resultDiv = document.getElementById('create-result');

    if (!barcodePrefix) {
        resultDiv.style.display = 'block';
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = '<strong>❌ Error:</strong> Barcode prefix is required';
        return;
    }

    if (count < 1 || count > 100) {
        resultDiv.style.display = 'block';
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = '<strong>❌ Error:</strong> Number of tapes must be between 1 and 100';
        return;
    }

    resultDiv.style.display = 'block';
    resultDiv.className = 'alert alert-info';
    resultDiv.innerHTML = '<strong>⏳</strong> Creating tapes...';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'create_tapes',
            library: library,
            barcode_prefix: barcodePrefix,
            start_num: startNum,
            count: count,
            size: size,
            media_type: mediaType,
            density: density
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            resultDiv.className = 'alert alert-success';
            resultDiv.innerHTML = `<strong>✅ Success!</strong> Created ${data.created_count} tape(s)`;
            if (data.errors && data.errors.length > 0) {
                resultDiv.innerHTML += `<br><small>Errors: ${data.errors.join(', ')}</small>`;
            }
            showNotification(`Created ${data.created_count} tape(s)`, 'success');
            loadTapeList();
        } else {
            resultDiv.className = 'alert alert-danger';
            resultDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
        }
    })
    .catch(error => {
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
    });
}

// ============================================
// iSCSI Target Management Functions
// ============================================

function loadTargets() {
    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'list_targets'
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            const tbody = document.getElementById('target-list-body');
            const emptyDiv = document.getElementById('target-list-empty');
            const containerDiv = document.getElementById('target-list-container');

            if (data.targets.length === 0) {
                emptyDiv.style.display = 'block';
                containerDiv.style.display = 'none';
            } else {
                emptyDiv.style.display = 'none';
                containerDiv.style.display = 'block';

                tbody.innerHTML = data.targets.map(target => `
                    <tr>
                        <td><strong>${target.tid}</strong></td>
                        <td><code>${target.name}</code></td>
                        <td>${target.luns || 0}</td>
                        <td>${target.acls || 0}</td>
                        <td>
                            <button class="btn btn-danger btn-sm" onclick="deleteTarget(${target.tid})">
                                🗑️ Delete
                            </button>
                        </td>
                    </tr>
                `).join('');
            }
        } else {
            showNotification(data.error, 'error');
        }
    })
    .catch(error => {
        showNotification('Failed to load targets: ' + error.message, 'error');
    });
}

function createTarget() {
    const tid = document.getElementById('target-tid').value;
    const name = document.getElementById('target-name').value.trim();
    const resultDiv = document.getElementById('create-target-result');

    if (!name) {
        resultDiv.style.display = 'block';
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = '<strong>❌ Error:</strong> Target name is required';
        return;
    }

    resultDiv.style.display = 'block';
    resultDiv.className = 'alert alert-info';
    resultDiv.innerHTML = '<strong>⏳</strong> Creating target...';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'create_target',
            tid: tid,
            name: name
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            resultDiv.className = 'alert alert-success';
            resultDiv.innerHTML = `<strong>✅ Success!</strong> Target created: ${data.iqn}`;
            showNotification('Target created successfully', 'success');
            loadTargets();
        } else {
            resultDiv.className = 'alert alert-danger';
            resultDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
        }
    })
    .catch(error => {
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
    });
}

function deleteTarget(tid) {
    if (!confirm(`Delete target ${tid}? This will remove all LUNs and ACLs.`)) {
        return;
    }

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'delete_target',
            tid: tid
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            showNotification('Target deleted successfully', 'success');
            loadTargets();
        } else {
            showNotification(data.error, 'error');
        }
    })
    .catch(error => {
        showNotification('Failed to delete target: ' + error.message, 'error');
    });
}

function addLun() {
    const tid = document.getElementById('lun-tid').value;
    const lun = document.getElementById('lun-number').value;
    const device = document.getElementById('lun-device').value.trim();
    const resultDiv = document.getElementById('add-lun-result');

    if (!device) {
        resultDiv.style.display = 'block';
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = '<strong>❌ Error:</strong> Device path is required';
        return;
    }

    resultDiv.style.display = 'block';
    resultDiv.className = 'alert alert-info';
    resultDiv.innerHTML = '<strong>⏳</strong> Adding LUN...';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'add_lun',
            tid: tid,
            lun: lun,
            device: device
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            resultDiv.className = 'alert alert-success';
            resultDiv.innerHTML = '<strong>✅ Success!</strong> LUN added successfully';
            showNotification('LUN added successfully', 'success');
            loadTargets();
        } else {
            resultDiv.className = 'alert alert-danger';
            resultDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
        }
    })
    .catch(error => {
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
    });
}

function bindInitiator() {
    const tid = document.getElementById('acl-tid').value;
    const address = document.getElementById('acl-address').value.trim();
    const resultDiv = document.getElementById('acl-result');

    if (!address) {
        resultDiv.style.display = 'block';
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = '<strong>❌ Error:</strong> Initiator address is required';
        return;
    }

    resultDiv.style.display = 'block';
    resultDiv.className = 'alert alert-info';
    resultDiv.innerHTML = '<strong>⏳</strong> Binding initiator...';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'bind_initiator',
            tid: tid,
            address: address
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            resultDiv.className = 'alert alert-success';
            resultDiv.innerHTML = '<strong>✅ Success!</strong> Initiator allowed';
            showNotification('Initiator allowed successfully', 'success');
            loadTargets();
        } else {
            resultDiv.className = 'alert alert-danger';
            resultDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
        }
    })
    .catch(error => {
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
    });
}

function unbindInitiator() {
    const tid = document.getElementById('acl-tid').value;
    const address = document.getElementById('acl-address').value.trim();
    const resultDiv = document.getElementById('acl-result');

    if (!address) {
        resultDiv.style.display = 'block';
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = '<strong>❌ Error:</strong> Initiator address is required';
        return;
    }

    if (!confirm(`Block initiator ${address} from target ${tid}?`)) {
        return;
    }

    resultDiv.style.display = 'block';
    resultDiv.className = 'alert alert-info';
    resultDiv.innerHTML = '<strong>⏳</strong> Unbinding initiator...';

    fetch('api.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            action: 'unbind_initiator',
            tid: tid,
            address: address
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            resultDiv.className = 'alert alert-success';
            resultDiv.innerHTML = '<strong>✅ Success!</strong> Initiator blocked';
            showNotification('Initiator blocked successfully', 'success');
            loadTargets();
        } else {
            resultDiv.className = 'alert alert-danger';
            resultDiv.innerHTML = `<strong>❌ Error:</strong> ${data.error}`;
        }
    })
    .catch(error => {
        resultDiv.className = 'alert alert-danger';
        resultDiv.innerHTML = `<strong>❌ Error:</strong> ${error.message}`;
    });
}